'\"
'\" Copyright (c) 2001 Vincent Darley
+'\" Copyright (c) 2008-2010 Donal K. Fellows
'\"
'\" See the file "license.terms" for information on usage and redistribution
'\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
'\"
-'\" RCS: @(#) $Id: FileSystem.3,v 1.32.2.2 2003/10/03 17:24:34 vincentdarley Exp $
-'\"
-'\" The definitions below are for supplemental macros used in Tcl/Tk
-'\" manual entries.
-'\"
-'\" .AP type name in/out ?indent?
-'\" Start paragraph describing an argument to a library procedure.
-'\" type is type of argument (int, etc.), in/out is either "in", "out",
-'\" or "in/out" to describe whether procedure reads or modifies arg,
-'\" and indent is equivalent to second arg of .IP (shouldn't ever be
-'\" needed; use .AS below instead)
-'\"
-'\" .AS ?type? ?name?
-'\" Give maximum sizes of arguments for setting tab stops. Type and
-'\" name are examples of largest possible arguments that will be passed
-'\" to .AP later. If args are omitted, default tab stops are used.
-'\"
-'\" .BS
-'\" Start box enclosure. From here until next .BE, everything will be
-'\" enclosed in one large box.
-'\"
-'\" .BE
-'\" End of box enclosure.
-'\"
-'\" .CS
-'\" Begin code excerpt.
-'\"
-'\" .CE
-'\" End code excerpt.
-'\"
-'\" .VS ?version? ?br?
-'\" Begin vertical sidebar, for use in marking newly-changed parts
-'\" of man pages. The first argument is ignored and used for recording
-'\" the version when the .VS was added, so that the sidebars can be
-'\" found and removed when they reach a certain age. If another argument
-'\" is present, then a line break is forced before starting the sidebar.
-'\"
-'\" .VE
-'\" End of vertical sidebar.
-'\"
-'\" .DS
-'\" Begin an indented unfilled display.
-'\"
-'\" .DE
-'\" End of indented unfilled display.
-'\"
-'\" .SO
-'\" Start of list of standard options for a Tk widget. The
-'\" options follow on successive lines, in four columns separated
-'\" by tabs.
-'\"
-'\" .SE
-'\" End of list of standard options for a Tk widget.
-'\"
-'\" .OP cmdName dbName dbClass
-'\" Start of description of a specific option. cmdName gives the
-'\" option's name as specified in the class command, dbName gives
-'\" the option's name in the option database, and dbClass gives
-'\" the option's class in the option database.
-'\"
-'\" .UL arg1 arg2
-'\" Print arg1 underlined, then print arg2 normally.
-'\"
-'\" RCS: @(#) $Id: man.macros,v 1.4 2000/08/25 06:18:32 ericm Exp $
-'\"
-'\" # Set up traps and other miscellaneous stuff for Tcl/Tk man pages.
+.TH Filesystem 3 8.4 Tcl "Tcl Library Procedures"
+.\" The -*- nroff -*- definitions below are for supplemental macros used
+.\" in Tcl/Tk manual entries.
+.\"
+.\" .AP type name in/out ?indent?
+.\" Start paragraph describing an argument to a library procedure.
+.\" type is type of argument (int, etc.), in/out is either "in", "out",
+.\" or "in/out" to describe whether procedure reads or modifies arg,
+.\" and indent is equivalent to second arg of .IP (shouldn't ever be
+.\" needed; use .AS below instead)
+.\"
+.\" .AS ?type? ?name?
+.\" Give maximum sizes of arguments for setting tab stops. Type and
+.\" name are examples of largest possible arguments that will be passed
+.\" to .AP later. If args are omitted, default tab stops are used.
+.\"
+.\" .BS
+.\" Start box enclosure. From here until next .BE, everything will be
+.\" enclosed in one large box.
+.\"
+.\" .BE
+.\" End of box enclosure.
+.\"
+.\" .CS
+.\" Begin code excerpt.
+.\"
+.\" .CE
+.\" End code excerpt.
+.\"
+.\" .VS ?version? ?br?
+.\" Begin vertical sidebar, for use in marking newly-changed parts
+.\" of man pages. The first argument is ignored and used for recording
+.\" the version when the .VS was added, so that the sidebars can be
+.\" found and removed when they reach a certain age. If another argument
+.\" is present, then a line break is forced before starting the sidebar.
+.\"
+.\" .VE
+.\" End of vertical sidebar.
+.\"
+.\" .DS
+.\" Begin an indented unfilled display.
+.\"
+.\" .DE
+.\" End of indented unfilled display.
+.\"
+.\" .SO ?manpage?
+.\" Start of list of standard options for a Tk widget. The manpage
+.\" argument defines where to look up the standard options; if
+.\" omitted, defaults to "options". The options follow on successive
+.\" lines, in three columns separated by tabs.
+.\"
+.\" .SE
+.\" End of list of standard options for a Tk widget.
+.\"
+.\" .OP cmdName dbName dbClass
+.\" Start of description of a specific option. cmdName gives the
+.\" option's name as specified in the class command, dbName gives
+.\" the option's name in the option database, and dbClass gives
+.\" the option's class in the option database.
+.\"
+.\" .UL arg1 arg2
+.\" Print arg1 underlined, then print arg2 normally.
+.\"
+.\" .QW arg1 ?arg2?
+.\" Print arg1 in quotes, then arg2 normally (for trailing punctuation).
+.\"
+.\" .PQ arg1 ?arg2?
+.\" Print an open parenthesis, arg1 in quotes, then arg2 normally
+.\" (for trailing punctuation) and then a closing parenthesis.
+.\"
+.\" # Set up traps and other miscellaneous stuff for Tcl/Tk man pages.
.if t .wh -1.3i ^B
.nr ^l \n(.l
.ad b
-'\" # Start an argument description
+.\" # Start an argument description
.de AP
.ie !"\\$4"" .TP \\$4
.el \{\
.\}
.ta \\n()Au \\n()Bu
.ie !"\\$3"" \{\
-\&\\$1 \\fI\\$2\\fP (\\$3)
+\&\\$1 \\fI\\$2\\fP (\\$3)
.\".b
.\}
.el \{\
.\}
.\}
..
-'\" # define tabbing values for .AP
+.\" # define tabbing values for .AP
.de AS
.nr )A 10n
.if !"\\$1"" .nr )A \\w'\\$1'u+3n
.nr )C \\n()Bu+\\w'(in/out)'u+2n
..
.AS Tcl_Interp Tcl_CreateInterp in/out
-'\" # BS - start boxed text
-'\" # ^y = starting y location
-'\" # ^b = 1
+.\" # BS - start boxed text
+.\" # ^y = starting y location
+.\" # ^b = 1
.de BS
.br
.mk ^y
.if n \l'\\n(.lu\(ul'
.if n .fi
..
-'\" # BE - end boxed text (draw box now)
+.\" # BE - end boxed text (draw box now)
.de BE
.nf
.ti 0
.br
.nr ^b 0
..
-'\" # VS - start vertical sidebar
-'\" # ^Y = starting y location
-'\" # ^v = 1 (for troff; for nroff this doesn't matter)
+.\" # VS - start vertical sidebar
+.\" # ^Y = starting y location
+.\" # ^v = 1 (for troff; for nroff this doesn't matter)
.de VS
.if !"\\$2"" .br
.mk ^Y
.ie n 'mc \s12\(br\s0
.el .nr ^v 1u
..
-'\" # VE - end of vertical sidebar
+.\" # VE - end of vertical sidebar
.de VE
.ie n 'mc
.el \{\
.\}
.nr ^v 0
..
-'\" # Special macro to handle page bottom: finish off current
-'\" # box/sidebar if in box/sidebar mode, then invoked standard
-'\" # page bottom macro.
+.\" # Special macro to handle page bottom: finish off current
+.\" # box/sidebar if in box/sidebar mode, then invoked standard
+.\" # page bottom macro.
.de ^B
.ev 2
'ti 0
.mk ^Y
.\}
..
-'\" # DS - begin display
+.\" # DS - begin display
.de DS
.RS
.nf
.sp
..
-'\" # DE - end display
+.\" # DE - end display
.de DE
.fi
.RE
.sp
..
-'\" # SO - start of list of standard options
+.\" # SO - start of list of standard options
.de SO
+'ie '\\$1'' .ds So \\fBoptions\\fR
+'el .ds So \\fB\\$1\\fR
.SH "STANDARD OPTIONS"
.LP
.nf
.ta 5.5c 11c
.ft B
..
-'\" # SE - end of list of standard options
+.\" # SE - end of list of standard options
.de SE
.fi
.ft R
.LP
-See the \\fBoptions\\fR manual entry for details on the standard options.
+See the \\*(So manual entry for details on the standard options.
..
-'\" # OP - start of full description for a single option
+.\" # OP - start of full description for a single option
.de OP
.LP
.nf
.fi
.IP
..
-'\" # CS - begin code excerpt
+.\" # CS - begin code excerpt
.de CS
.RS
.nf
.ta .25i .5i .75i 1i
..
-'\" # CE - end code excerpt
+.\" # CE - end code excerpt
.de CE
.fi
.RE
..
+.\" # UL - underline word
.de UL
\\$1\l'|0\(ul'\\$2
..
-.TH Filesystem 3 8.4 Tcl "Tcl Library Procedures"
+.\" # QW - apply quotation marks to word
+.de QW
+.ie '\\*(lq'"' ``\\$1''\\$2
+.\"" fix emacs highlighting
+.el \\*(lq\\$1\\*(rq\\$2
+..
+.\" # PQ - apply parens and quotation marks to word
+.de PQ
+.ie '\\*(lq'"' (``\\$1''\\$2)\\$3
+.\"" fix emacs highlighting
+.el (\\*(lq\\$1\\*(rq\\$2)\\$3
+..
+.\" # QR - quoted range
+.de QR
+.ie '\\*(lq'"' ``\\$1''\\-``\\$2''\\$3
+.\"" fix emacs highlighting
+.el \\*(lq\\$1\\*(rq\\-\\*(lq\\$2\\*(rq\\$3
+..
+.\" # MT - "empty" string
+.de MT
+.QW ""
+..
.BS
.SH NAME
-Tcl_FSRegister, Tcl_FSUnregister, Tcl_FSData, Tcl_FSMountsChanged, Tcl_FSGetFileSystemForPath, Tcl_FSGetPathType, Tcl_FSCopyFile, Tcl_FSCopyDirectory, Tcl_FSCreateDirectory, Tcl_FSDeleteFile, Tcl_FSRemoveDirectory, Tcl_FSRenameFile, Tcl_FSListVolumes, Tcl_FSEvalFile, Tcl_FSLoadFile, Tcl_FSMatchInDirectory, Tcl_FSLink, Tcl_FSLstat, Tcl_FSUtime, Tcl_FSFileAttrsGet, Tcl_FSFileAttrsSet, Tcl_FSFileAttrStrings, Tcl_FSStat, Tcl_FSAccess, Tcl_FSOpenFileChannel, Tcl_FSGetCwd, Tcl_FSChdir, Tcl_FSPathSeparator, Tcl_FSJoinPath, Tcl_FSSplitPath, Tcl_FSEqualPaths, Tcl_FSGetNormalizedPath, Tcl_FSJoinToPath, Tcl_FSConvertToPathType, Tcl_FSGetInternalRep, Tcl_FSGetTranslatedPath, Tcl_FSGetTranslatedStringPath, Tcl_FSNewNativePath, Tcl_FSGetNativePath, Tcl_FSFileSystemInfo, Tcl_AllocStatBuf \- procedures to interact with any filesystem
+Tcl_FSRegister, Tcl_FSUnregister, Tcl_FSData, Tcl_FSMountsChanged, Tcl_FSGetFileSystemForPath, Tcl_FSGetPathType, Tcl_FSCopyFile, Tcl_FSCopyDirectory, Tcl_FSCreateDirectory, Tcl_FSDeleteFile, Tcl_FSRemoveDirectory, Tcl_FSRenameFile, Tcl_FSListVolumes, Tcl_FSEvalFile, Tcl_FSEvalFileEx, Tcl_FSLoadFile, Tcl_FSUnloadFile, Tcl_FSMatchInDirectory, Tcl_FSLink, Tcl_FSLstat, Tcl_FSUtime, Tcl_FSFileAttrsGet, Tcl_FSFileAttrsSet, Tcl_FSFileAttrStrings, Tcl_FSStat, Tcl_FSAccess, Tcl_FSOpenFileChannel, Tcl_FSGetCwd, Tcl_FSChdir, Tcl_FSPathSeparator, Tcl_FSJoinPath, Tcl_FSSplitPath, Tcl_FSEqualPaths, Tcl_FSGetNormalizedPath, Tcl_FSJoinToPath, Tcl_FSConvertToPathType, Tcl_FSGetInternalRep, Tcl_FSGetTranslatedPath, Tcl_FSGetTranslatedStringPath, Tcl_FSNewNativePath, Tcl_FSGetNativePath, Tcl_FSFileSystemInfo, Tcl_GetAccessTimeFromStat, Tcl_GetBlockSizeFromStat, Tcl_GetBlocksFromStat, Tcl_GetChangeTimeFromStat, Tcl_GetDeviceTypeFromStat, Tcl_GetFSDeviceFromStat, Tcl_GetFSInodeFromStat, Tcl_GetGroupIdFromStat, Tcl_GetLinkCountFromStat, Tcl_GetModeFromStat, Tcl_GetModificationTimeFromStat, Tcl_GetSizeFromStat, Tcl_GetUserIdFromStat, Tcl_AllocStatBuf \- procedures to interact with any filesystem
.SH SYNOPSIS
.nf
\fB#include <tcl.h>\fR
void
\fBTcl_FSMountsChanged\fR(\fIfsPtr\fR)
.sp
-Tcl_Filesystem*
-\fBTcl_FSGetFileSystemForPath\fR(\fIpathObjPtr\fR)
+const Tcl_Filesystem *
+\fBTcl_FSGetFileSystemForPath\fR(\fIpathPtr\fR)
.sp
Tcl_PathType
-\fBTcl_FSGetPathType\fR(\fIpathObjPtr\fR)
+\fBTcl_FSGetPathType\fR(\fIpathPtr\fR)
.sp
int
\fBTcl_FSCopyFile\fR(\fIsrcPathPtr, destPathPtr\fR)
int
\fBTcl_FSRenameFile\fR(\fIsrcPathPtr, destPathPtr\fR)
.sp
-Tcl_Obj*
+Tcl_Obj *
\fBTcl_FSListVolumes\fR(\fIvoid\fR)
.sp
int
+\fBTcl_FSEvalFileEx\fR(\fIinterp, pathPtr, encodingName\fR)
+.sp
+int
\fBTcl_FSEvalFile\fR(\fIinterp, pathPtr\fR)
.sp
int
-\fBTcl_FSLoadFile\fR(\fIinterp, pathPtr, sym1, sym2, proc1Ptr, proc2Ptr, handlePtr, unloadProcPtr\fR)
+\fBTcl_FSLoadFile\fR(\fIinterp, pathPtr, sym1, sym2, proc1Ptr, proc2Ptr,
+ loadHandlePtr, unloadProcPtr\fR)
.sp
+.VS 8.6
int
-\fBTcl_FSMatchInDirectory\fR(\fIinterp, result, pathPtr, pattern, types\fR)
+\fBTcl_FSUnloadFile\fR(\fIinterp, loadHandle\fR)
+.VE 8.6
.sp
-Tcl_Obj*
+int
+\fBTcl_FSMatchInDirectory\fR(\fIinterp, resultPtr, pathPtr, pattern, types\fR)
+.sp
+Tcl_Obj *
\fBTcl_FSLink\fR(\fIlinkNamePtr, toPtr, linkAction\fR)
.sp
int
int
\fBTcl_FSFileAttrsSet\fR(\fIinterp, int index, pathPtr, Tcl_Obj *objPtr\fR)
.sp
-CONST char**
+const char *const *
\fBTcl_FSFileAttrStrings\fR(\fIpathPtr, objPtrRef\fR)
.sp
int
int
\fBTcl_FSAccess\fR(\fIpathPtr, mode\fR)
.sp
-Tcl_Channel
+Tcl_Channel
\fBTcl_FSOpenFileChannel\fR(\fIinterp, pathPtr, modeString, permissions\fR)
.sp
-Tcl_Obj*
+Tcl_Obj *
\fBTcl_FSGetCwd\fR(\fIinterp\fR)
.sp
int
\fBTcl_FSChdir\fR(\fIpathPtr\fR)
.sp
-Tcl_Obj*
+Tcl_Obj *
\fBTcl_FSPathSeparator\fR(\fIpathPtr\fR)
.sp
-Tcl_Obj*
+Tcl_Obj *
\fBTcl_FSJoinPath\fR(\fIlistObj, elements\fR)
.sp
-Tcl_Obj*
+Tcl_Obj *
\fBTcl_FSSplitPath\fR(\fIpathPtr, lenPtr\fR)
.sp
int
\fBTcl_FSEqualPaths\fR(\fIfirstPtr, secondPtr\fR)
.sp
-Tcl_Obj*
+Tcl_Obj *
\fBTcl_FSGetNormalizedPath\fR(\fIinterp, pathPtr\fR)
.sp
-Tcl_Obj*
+Tcl_Obj *
\fBTcl_FSJoinToPath\fR(\fIbasePtr, objc, objv\fR)
.sp
int
\fBTcl_FSConvertToPathType\fR(\fIinterp, pathPtr\fR)
.sp
-ClientData
+ClientData
\fBTcl_FSGetInternalRep\fR(\fIpathPtr, fsPtr\fR)
.sp
-Tcl_Obj*
+Tcl_Obj *
\fBTcl_FSGetTranslatedPath\fR(\fIinterp, pathPtr\fR)
.sp
-CONST char*
+const char *
\fBTcl_FSGetTranslatedStringPath\fR(\fIinterp, pathPtr\fR)
.sp
-Tcl_Obj*
+Tcl_Obj *
\fBTcl_FSNewNativePath\fR(\fIfsPtr, clientData\fR)
.sp
-CONST char*
+const void *
\fBTcl_FSGetNativePath\fR(\fIpathPtr\fR)
.sp
-Tcl_Obj*
+Tcl_Obj *
\fBTcl_FSFileSystemInfo\fR(\fIpathPtr\fR)
.sp
-Tcl_StatBuf*
+Tcl_StatBuf *
\fBTcl_AllocStatBuf\fR()
+.sp
+.VS 8.6
+Tcl_WideInt
+\fBTcl_GetAccessTimeFromStat\fR(\fIstatPtr\fR)
+.sp
+unsigned
+\fBTcl_GetBlockSizeFromStat\fR(\fIstatPtr\fR)
+.sp
+Tcl_WideUInt
+\fBTcl_GetBlocksFromStat\fR(\fIstatPtr\fR)
+.sp
+Tcl_WideInt
+\fBTcl_GetChangeTimeFromStat\fR(\fIstatPtr\fR)
+.sp
+int
+\fBTcl_GetDeviceTypeFromStat\fR(\fIstatPtr\fR)
+.sp
+unsigned
+\fBTcl_GetFSDeviceFromStat\fR(\fIstatPtr\fR)
+.sp
+unsigned
+\fBTcl_GetFSInodeFromStat\fR(\fIstatPtr\fR)
+.sp
+int
+\fBTcl_GetGroupIdFromStat\fR(\fIstatPtr\fR)
+.sp
+int
+\fBTcl_GetLinkCountFromStat\fR(\fIstatPtr\fR)
+.sp
+unsigned
+\fBTcl_GetModeFromStat\fR(\fIstatPtr\fR)
+.sp
+Tcl_WideInt
+\fBTcl_GetModificationTimeFromStat\fR(\fIstatPtr\fR)
+.sp
+Tcl_WideUInt
+\fBTcl_GetSizeFromStat\fR(\fIstatPtr\fR)
+.sp
+int
+\fBTcl_GetUserIdFromStat\fR(\fIstatPtr\fR)
+.VE 8.6
.SH ARGUMENTS
-.AS Tcl_Filesystem *fsPtr in
-.AP Tcl_Filesystem *fsPtr in
+.AS Tcl_GlobTypeData **srcPathPtr out
+.AP "const Tcl_Filesystem" *fsPtr in
Points to a structure containing the addresses of procedures that
can be called to perform the various filesystem operations.
.AP Tcl_Obj *pathPtr in
-The path represented by this object is used for the operation in
-question. If the object does not already have an internal \fBpath\fR
+The path represented by this value is used for the operation in
+question. If the value does not already have an internal \fBpath\fR
representation, it will be converted to have one.
.AP Tcl_Obj *srcPathPtr in
-As for \fBpathPtr\fR, but used for the source file for a copy or
+As for \fIpathPtr\fR, but used for the source file for a copy or
rename operation.
.AP Tcl_Obj *destPathPtr in
-As for \fBpathPtr\fR, but used for the destination filename for a copy or
+As for \fIpathPtr\fR, but used for the destination filename for a copy or
rename operation.
-.AP "CONST char" *pattern in
-Only files or directories matching this pattern will be returned by
-\fBTcl_FSMatchInDirectory\fR.
-.AP GlobTypeData *types in
+.AP "const char" *encodingName in
+The encoding of the data stored in the
+file identified by \fIpathPtr\fR and to be evaluated.
+.AP "const char" *pattern in
+Only files or directories matching this pattern will be returned.
+.AP Tcl_GlobTypeData *types in
Only files or directories matching the type descriptions contained in
-this structure will be returned by \fBTcl_FSMatchInDirectory\fR. It
-is very important that the 'directory' flag is properly handled.
-This parameter may be NULL.
+this structure will be returned. This parameter may be NULL.
.AP Tcl_Interp *interp in
-Interpreter to use either for results, evaluation, or reporting error
+Interpreter to use either for results, evaluation, or reporting error
messages.
.AP ClientData clientData in
-The native description of the path object to create.
+The native description of the path value to create.
.AP Tcl_Obj *firstPtr in
-The first of two path objects to compare. The object may be converted
+The first of two path values to compare. The value may be converted
to \fBpath\fR type.
.AP Tcl_Obj *secondPtr in
-The second of two path objects to compare. The object may be converted
+The second of two path values to compare. The value may be converted
to \fBpath\fR type.
.AP Tcl_Obj *listObj in
The list of path elements to operate on with a \fBjoin\fR operation.
.AP int elements in
-If non-negative, the number of elements in the listObj which should
-be joined together. If negative, then all elements are joined.
+If non-negative, the number of elements in the \fIlistObj\fR which should
+be joined together. If negative, then all elements are joined.
.AP Tcl_Obj **errorPtr out
-In the case of an error, filled with an object containing the name of
+In the case of an error, filled with a value containing the name of
the file which caused an error in the various copy/rename operations.
.AP Tcl_Obj **objPtrRef out
-Filled with an object containing the result of the operation.
-.AP Tcl_Obj *result out
-Pre-allocated object in which to store (by lappending) the list of
-files or directories which are successfully matched in
-\fBTcl_FSMatchInDirectory\fR.
+Filled with a value containing the result of the operation.
+.AP Tcl_Obj *resultPtr out
+Pre-allocated value in which to store (using
+\fBTcl_ListObjAppendElement\fR) the list of
+files or directories which are successfully matched.
.AP int mode in
-Mask consisting of one or more of R_OK, W_OK, X_OK and F_OK. R_OK,
+Mask consisting of one or more of R_OK, W_OK, X_OK and F_OK. R_OK,
W_OK and X_OK request checking whether the file exists and has read,
-write and execute permissions, respectively. F_OK just requests
+write and execute permissions, respectively. F_OK just requests
checking for the existence of the file.
.AP Tcl_StatBuf *statPtr out
The structure that contains the result of a stat or lstat operation.
-.AP "CONST char" *sym1 in
+.AP "const char" *sym1 in
Name of a procedure to look up in the file's symbol table
-.AP "CONST char" *sym2 in
+.AP "const char" *sym2 in
Name of a procedure to look up in the file's symbol table
.AP Tcl_PackageInitProc **proc1Ptr out
Filled with the init function for this code.
.AP ClientData *clientDataPtr out
Filled with the clientData value to pass to this code's unload
function when it is called.
-.AP TclfsUnloadFileProc_ **unloadProcPtr out
+.AP Tcl_LoadHandle *loadHandlePtr out
+Filled with an abstract token representing the loaded file.
+.AP Tcl_FSUnloadFileProc **unloadProcPtr out
Filled with the function to use to unload this piece of code.
+.AP Tcl_LoadHandle loadHandle in
+Handle to the loaded library to be unloaded.
.AP utimbuf *tval in
-The access and modification times in this structure are read and
+The access and modification times in this structure are read and
used to set those values for a given file.
-.AP "CONST char" *modeString in
-Specifies how the file is to be accessed. May have any of the values
+.AP "const char" *modeString in
+Specifies how the file is to be accessed. May have any of the values
allowed for the \fImode\fR argument to the Tcl \fBopen\fR command.
.AP int permissions in
-POSIX-style permission flags such as 0644. If a new file is created, these
+POSIX-style permission flags such as 0644. If a new file is created, these
permissions will be set on the created file.
.AP int *lenPtr out
If non-NULL, filled with the number of elements in the split path.
.AP Tcl_Obj *basePtr in
-The base path on to which to join the given elements. May be NULL.
+The base path on to which to join the given elements. May be NULL.
.AP int objc in
The number of elements in \fIobjv\fR.
-.AP "Tcl_Obj *CONST" objv[] in
+.AP "Tcl_Obj *const" objv[] in
The elements to join to the given base path.
+.AP Tcl_Obj *linkNamePtr in
+The name of the link to be created or read.
+.AP Tcl_Obj *toPtr in
+What the link called \fIlinkNamePtr\fR should be linked to, or NULL if
+the symbolic link specified by \fIlinkNamePtr\fR is to be read.
+.AP int linkAction in
+OR-ed combination of flags indicating what kind of link should be
+created (will be ignored if \fItoPtr\fR is NULL). Valid bits to set
+are \fBTCL_CREATE_SYMBOLIC_LINK\fR and \fBTCL_CREATE_HARD_LINK\fR.
+When both flags are set and the underlying filesystem can do either,
+symbolic links are preferred.
.BE
-
.SH DESCRIPTION
.PP
-There are several reasons for calling the \fBTcl_FS...\fR functions
+There are several reasons for calling the \fBTcl_FS\fR API functions
+(e.g.\ \fBTcl_FSAccess\fR and \fBTcl_FSStat\fR)
rather than calling system level functions like \fBaccess\fR and
-\fBstat\fR directly. First, they will work cross-platform, so an
-extension which calls them should work unmodified on Unix, MacOS and
-Windows. Second, the Windows implementation of some of these functions
-fixes some bugs in the system level calls. Third, these function calls
-deal with any 'Utf to platform-native' path conversions which may be
+\fBstat\fR directly. First, they will work cross-platform, so an
+extension which calls them should work unmodified on Unix and
+Windows. Second, the Windows implementation of some of these functions
+fixes some bugs in the system level calls. Third, these function calls
+deal with any
+.QW "Utf to platform-native"
+path conversions which may be
required (and may cache the results of such conversions for greater
-efficiency on subsequent calls). Fourth, and perhaps most importantly,
-all of these functions are 'virtual filesystem aware'. Any virtual
-filesystem which has been registered (through
+efficiency on subsequent calls). Fourth, and perhaps most importantly,
+all of these functions are
+.QW "virtual filesystem aware" .
+Any virtual filesystem (VFS for short) which has been registered (through
\fBTcl_FSRegister\fR) may reroute file access to alternative
-media or access methods. This means that all of these functions (and
+media or access methods. This means that all of these functions (and
therefore the corresponding \fBfile\fR, \fBglob\fR, \fBpwd\fR, \fBcd\fR,
-\fBopen\fR, etc. Tcl commands) may be operate on 'files' which are not
-native files in the native filesystem. This also means that any Tcl
-extension which accesses the filesystem through this API is
-automatically 'virtual filesystem aware'. Of course, if an extension
+\fBopen\fR, etc.\ Tcl commands) may be operate on
+.QW files
+which are not
+native files in the native filesystem. This also means that any Tcl
+extension which accesses the filesystem (FS for short) through this API is
+automatically
+.QW "virtual filesystem aware" .
+Of course, if an extension
accesses the native filesystem directly (through platform-specific
-APIs, for example), then Tcl cannot intercept such calls.
+APIs, for example), then Tcl cannot intercept such calls.
.PP
-If appropriate vfs's have been registered, the 'files' may, to give two
-examples, be remote (e.g. situated on a remote ftp server) or archived
-(e.g. lying inside a .zip archive). Such registered filesystems provide
+If appropriate VFSes have been registered, the
+.QW files
+may, to give two
+examples, be remote (e.g.\ situated on a remote ftp server) or archived
+(e.g.\ lying inside a .zip archive). Such registered filesystems provide
a lookup table of functions to implement all or some of the functionality
-listed here. Finally, the \fBTcl_FSStat\fR and \fBTcl_FSLstat\fR calls
-abstract away from what the 'struct stat' buffer buffer is actually
+listed here. Finally, the \fBTcl_FSStat\fR and \fBTcl_FSLstat\fR calls
+abstract away from what the
+.QW "struct stat"
+buffer is actually
declared to be, allowing the same code to be used both on systems with
and systems without support for files larger than 2GB in size.
.PP
-The \fBTcl_FS...\fR are objectified and may cache internal
-representations and other path-related strings (e.g. the current working
-directory). One side-effect of this is that one must not pass in objects
-with a refCount of zero to any of these functions. If such calls were
+The \fBTcl_FS\fR API is \fBTcl_Obj\fR-ified and may cache internal
+representations and other path-related strings (e.g.\ the current working
+directory). One side-effect of this is that one must not pass in values
+with a reference count of zero to any of these functions. If such calls were
handled, they might result
in memory leaks (under some circumstances, the filesystem code may wish
-to retain a reference to the passed in object, and so one must not assume
-that after any of these calls return, the object still has a refCount of
-zero - it may have been incremented), or in a direct segfault
-due to the object being freed part way through the complex object
+to retain a reference to the passed in value, and so one must not assume
+that after any of these calls return, the value still has a reference count of
+zero - it may have been incremented) or in a direct segmentation fault
+(or other memory access error)
+due to the value being freed part way through the complex value
manipulation required to ensure that the path is fully normalized and
-absolute for filesystem determination. The practical lesson to learn
-from this is that \fBTcl_Obj *path = Tcl_NewStringObj(...) ;
-Tcl_FS...(path) ; Tcl_DecrRefCount(path)\fR is wrong, and may segfault.
-The 'path' must have its refCount incremented before passing it in, or
-decrementing it. For this reason, objects with a refCount of zero are
-considered not to be valid filesystem paths and calling any Tcl_FS API
-with such an object will result in no action being taken.
+absolute for filesystem determination. The practical lesson to learn
+from this is that
.PP
-\fBTcl_FSCopyFile\fR attempts to copy the file given by srcPathPtr to the
-path name given by destPathPtr. If the two paths given lie in the same
-filesystem (according to \fBTcl_FSGetFileSystemForPath\fR) then that
-filesystem's 'copy file' function is called (if it is non-NULL).
-Otherwise the function returns -1 and sets Tcl's errno to the 'EXDEV'
-posix error code (which signifies a 'cross-domain link').
+.CS
+Tcl_Obj *path = Tcl_NewStringObj(...);
+Tcl_FS\fIWhatever\fR(path);
+Tcl_DecrRefCount(path);
+.CE
.PP
-\fBTcl_FSCopyDirectory\fR attempts to copy the directory given by srcPathPtr to the
-path name given by destPathPtr. If the two paths given lie in the same
+is wrong, and may cause memory errors. The \fIpath\fR must have its
+reference count incremented before passing it in, or
+decrementing it. For this reason, values with a reference count of zero are
+considered not to be valid filesystem paths and calling any Tcl_FS API
+function with such a value will result in no action being taken.
+.SS "FS API FUNCTIONS"
+\fBTcl_FSCopyFile\fR attempts to copy the file given by \fIsrcPathPtr\fR to the
+path name given by \fIdestPathPtr\fR. If the two paths given lie in the same
filesystem (according to \fBTcl_FSGetFileSystemForPath\fR) then that
-filesystem's 'copy file' function is called (if it is non-NULL).
-Otherwise the function returns -1 and sets Tcl's errno to the 'EXDEV'
-posix error code (which signifies a 'cross-domain link').
+filesystem's
+.QW "copy file"
+function is called (if it is non-NULL).
+Otherwise the function returns -1 and sets the \fBerrno\fR global C
+variable to the
+.QW EXDEV
+POSIX error code (which signifies a
+.QW "cross-domain link" ).
+.PP
+\fBTcl_FSCopyDirectory\fR attempts to copy the directory given by \fIsrcPathPtr\fR to the
+path name given by \fIdestPathPtr\fR. If the two paths given lie in the same
+filesystem (according to \fBTcl_FSGetFileSystemForPath\fR) then that
+filesystem's
+.QW "copy file"
+function is called (if it is non-NULL).
+Otherwise the function returns -1 and sets the \fBerrno\fR global C
+variable to the
+.QW EXDEV
+POSIX error code (which signifies a
+.QW "cross-domain link" ).
.PP
\fBTcl_FSCreateDirectory\fR attempts to create the directory given by
-pathPtr by calling the owning filesystem's 'create directory'
+\fIpathPtr\fR by calling the owning filesystem's
+.QW "create directory"
function.
.PP
\fBTcl_FSDeleteFile\fR attempts to delete the file given by
-pathPtr by calling the owning filesystem's 'delete file'
+\fIpathPtr\fR by calling the owning filesystem's
+.QW "delete file"
function.
.PP
\fBTcl_FSRemoveDirectory\fR attempts to remove the directory given by
-pathPtr by calling the owning filesystem's 'remove directory'
+\fIpathPtr\fR by calling the owning filesystem's
+.QW "remove directory"
function.
.PP
\fBTcl_FSRenameFile\fR attempts to rename the file or directory given by
-srcPathPtr to the path name given by destPathPtr. If the two paths
+\fIsrcPathPtr\fR to the path name given by \fIdestPathPtr\fR. If the two paths
given lie in the same filesystem (according to
-\fBTcl_FSGetFileSystemForPath\fR) then that filesystem's 'rename file'
-function is called (if it is non-NULL). Otherwise the function returns -1
-and sets Tcl's errno to the 'EXDEV' posix error code (which signifies
-a ``cross-domain link'').
-.PP
-\fBTcl_FSListVolumes\fR calls each filesystem which has a non-NULL 'list
-volumes' function and asks them to return their list of root volumes. It
+\fBTcl_FSGetFileSystemForPath\fR) then that filesystem's
+.QW "rename file"
+function is called (if it is non-NULL). Otherwise the function returns -1
+and sets the \fBerrno\fR global C variable to the
+.QW EXDEV
+POSIX error code (which signifies a
+.QW "cross-domain link" ).
+.PP
+\fBTcl_FSListVolumes\fR calls each filesystem which has a non-NULL
+.QW "list volumes"
+function and asks them to return their list of root volumes. It
accumulates the return values in a list which is returned to the
-caller (with a refCount of 0).
+caller (with a reference count of 0).
.PP
-\fBTcl_FSEvalFile\fR reads the file given by \fIpathPtr\fR and evaluates
-its contents as a Tcl script. It returns the same information as
+\fBTcl_FSEvalFileEx\fR reads the file given by \fIpathPtr\fR using
+the encoding identified by \fIencodingName\fR and evaluates
+its contents as a Tcl script. It returns the same information as
\fBTcl_EvalObjEx\fR.
-If the file couldn't be read then a Tcl error is returned to describe
-why the file couldn't be read.
-The eofchar for files is '\\32' (^Z) for all platforms.
-If you require a ``^Z'' in code for string comparison, you can use
-``\\032'' or ``\\u001a'', which will be safely substituted by the Tcl
-interpreter into ``^Z''.
+If \fIencodingName\fR is NULL, the system encoding is used for
+reading the file contents.
+If the file could not be read then a Tcl error is returned to describe
+why the file could not be read.
+The eofchar for files is
+.QW \e32
+(^Z) for all platforms.
+If you require a
+.QW ^Z
+in code for string comparison, you can use
+.QW \e032
+or
+.QW \eu001a ,
+which will be safely substituted by the Tcl interpreter into
+.QW ^Z .
+\fBTcl_FSEvalFile\fR is a simpler version of
+\fBTcl_FSEvalFileEx\fR that always uses the system encoding
+when reading the file.
.PP
\fBTcl_FSLoadFile\fR dynamically loads a binary code file into memory and
returns the addresses of two procedures within that file, if they are
-defined. The appropriate function for the filesystem to which pathPtr
-belongs will be called. If that filesystem does not implement this
+defined. The appropriate function for the filesystem to which \fIpathPtr\fR
+belongs will be called. If that filesystem does not implement this
function (most virtual filesystems will not, because of OS limitations
in dynamically loading binary code), Tcl will attempt to copy the file
to a temporary directory and load that temporary file.
+.VS 8.6
+\fBTcl_FSUnloadFile\fR reverses the operation, asking for the library
+indicated by the \fIloadHandle\fR to be removed from the process. Note that,
+unlike with the \fBunload\fR command, this does not give the library any
+opportunity to clean up.
+.VE 8.6
.PP
-Returns a standard Tcl completion code. If an error occurs, an error
-message is left in the interp's result.
+Both the above functions return a standard Tcl completion code. If an error
+occurs, an error message is left in the \fIinterp\fR's result.
+.PP
+.VS 8.6
+The token provided via the variable indicated by \fIloadHandlePtr\fR may be
+used with \fBTcl_FindSymbol\fR.
+.VE 8.6
.PP
\fBTcl_FSMatchInDirectory\fR is used by the globbing code to search a
-directory for all files which match a given pattern. The appropriate
-function for the filesystem to which pathPtr belongs will be called.
+directory for all files which match a given pattern. The appropriate
+function for the filesystem to which \fIpathPtr\fR belongs will be called.
.PP
The return value is a standard Tcl result indicating whether an error
-occurred in globbing. Error messages are placed in interp, but good
-results are placed in the resultPtr given.
-
-Note that the 'glob' code implements recursive patterns internally, so
+occurred in globbing. Error messages are placed in interp (unless
+interp is NULL, which is allowed), but good results are placed in the
+resultPtr given.
+.PP
+Note that the \fBglob\fR code implements recursive patterns internally, so
this function will only ever be passed simple patterns, which can be
-matched using the logic of 'string match'. To handle recursion, Tcl
+matched using the logic of \fBstring match\fR. To handle recursion, Tcl
will call this function frequently asking only for directories to be
-returned.
+returned. A special case of being called with a NULL pattern indicates
+that the path needs to be checked only for the correct type.
.PP
-\fBTcl_FSLink\fR replaces the library version of readlink(), and
-extends it to support the creation of links. The appropriate function
-for the filesystem to which linkNamePtr belongs will be called.
+\fBTcl_FSLink\fR replaces the library version of \fBreadlink\fR, and
+extends it to support the creation of links. The appropriate function
+for the filesystem to which \fIlinkNamePtr\fR belongs will be called.
.PP
-If the \fItoPtr\fR is NULL, a readlink action is performed. The result
+If the \fItoPtr\fR is NULL, a
+.QW "read link"
+action is performed. The result
is a Tcl_Obj specifying the contents of the symbolic link given by
-\fIlinkNamePtr\fR, or NULL if the link could not be read. The result is owned
-by the caller, which should call Tcl_DecrRefCount when the result is no
-longer needed. If the \fItoPtr\fR is not NULL, Tcl should create a link
-of one of the types passed in in the \fIlinkAction\fR flag. This flag is
-an or'd combination of TCL_CREATE_SYMBOLIC_LINK and TCL_CREATE_HARD_LINK.
-Where a choice exists (i.e. more than one flag is passed in), the Tcl
-convention is to prefer symbolic links. When a link is successfully
+\fIlinkNamePtr\fR, or NULL if the link could not be read. The result is owned
+by the caller, which should call \fBTcl_DecrRefCount\fR when the result is no
+longer needed. If the \fItoPtr\fR is not NULL, Tcl should create a link
+of one of the types passed in in the \fIlinkAction\fR flag. This flag is
+an ORed combination of \fBTCL_CREATE_SYMBOLIC_LINK\fR and \fBTCL_CREATE_HARD_LINK\fR.
+Where a choice exists (i.e.\ more than one flag is passed in), the Tcl
+convention is to prefer symbolic links. When a link is successfully
created, the return value should be \fItoPtr\fR (which is therefore
-already owned by the caller). If unsuccessful, NULL should be
-returned.
+already owned by the caller). If unsuccessful, NULL is returned.
.PP
-\fBTcl_FSLstat\fR fills the stat structure \fIstatPtr\fR with information
-about the specified file. You do not need any access rights to the
+\fBTcl_FSLstat\fR fills the \fITcl_StatBuf\fR structure \fIstatPtr\fR with
+information about the specified file. You do not need any access rights to the
file to get this information but you need search rights to all
-directories named in the path leading to the file. The stat structure
-includes info regarding device, inode (always 0 on Windows),
+directories named in the path leading to the file. The \fITcl_StatBuf\fR
+structure includes info regarding device, inode (always 0 on Windows),
privilege mode, nlink (always 1 on Windows), user id (always 0 on
Windows), group id (always 0 on Windows), rdev (same as device on
-Windows), size, last access time, last modification time, and creation
-time.
+Windows), size, last access time, last modification time, and
+last metadata change time.
+See \fBPORTABLE STAT RESULT API\fR for a description of how to write
+portable code to allocate and access the \fITcl_StatBuf\fR structure.
.PP
If \fIpath\fR exists, \fBTcl_FSLstat\fR returns 0 and the stat structure
-is filled with data. Otherwise, -1 is returned, and no stat info is
+is filled with data. Otherwise, -1 is returned, and no stat info is
given.
.PP
-\fBTcl_FSUtime\fR replaces the library version of utime.
+\fBTcl_FSUtime\fR replaces the library version of utime.
+.PP
+This returns 0 on success and -1 on error (as per the \fButime\fR
+documentation). If successful, the function
+will update the
+.QW atime
+and
+.QW mtime
+values of the file given.
.PP
-For results see 'utime' documentation. If successful, the function
-will update the 'atime' and 'mtime' values of the file given.
+\fBTcl_FSFileAttrsGet\fR implements read access for the hookable \fBfile
+attributes\fR subcommand. The appropriate function for the filesystem to
+which \fIpathPtr\fR belongs will be called.
.PP
-\fBTcl_FSFileAttrsGet\fR implements read access for the hookable 'file
-attributes' subcommand. The appropriate function for the filesystem to
-which pathPtr belongs will be called.
+If the result is \fBTCL_OK\fR, then a value was placed in
+\fIobjPtrRef\fR, which
+will only be temporarily valid (unless \fBTcl_IncrRefCount\fR is called).
.PP
-If the result is TCL_OK, then an object was placed in objPtrRef, which
-will only be temporarily valid (unless Tcl_IncrRefCount is called).
+\fBTcl_FSFileAttrsSet\fR implements write access for the hookable \fBfile
+attributes\fR subcommand. The appropriate function for the filesystem to
+which \fIpathPtr\fR belongs will be called.
.PP
-\fBTcl_FSFileAttrsSet\fR implements write access for the hookable 'file
-attributes' subcommand. The appropriate function for the filesystem to
-which pathPtr belongs will be called.
+\fBTcl_FSFileAttrStrings\fR implements part of the hookable \fBfile
+attributes\fR subcommand. The appropriate function for the filesystem
+to which \fIpathPtr\fR belongs will be called.
.PP
-\fBTcl_FSFileAttrStrings\fR implements part of the hookable 'file attributes'
-subcommand. The appropriate function for the filesystem to which
-pathPtr belongs will be called.
-.PP
The called procedure may either return an array of strings, or may
-instead return NULL and place a Tcl list into the given objPtrRef. Tcl
-will take that list and first increment its refCount before using it.
-On completion of that use, Tcl will decrement its refCount. Hence if
+instead return NULL and place a Tcl list into the given \fIobjPtrRef\fR. Tcl
+will take that list and first increment its reference count before using it.
+On completion of that use, Tcl will decrement its reference count. Hence if
the list should be disposed of by Tcl when done, it should have a
-refCount of zero, and if the list should not be disposed of, the
-filesystem should ensure it retains a refCount on the object.
+reference count of zero, and if the list should not be disposed of, the
+filesystem should ensure it retains a reference count to the value.
.PP
\fBTcl_FSAccess\fR checks whether the process would be allowed to read,
-write or test for existence of the file (or other file system object)
-whose name is pathname. If pathname is a symbolic link on Unix,
+write or test for existence of the file (or other filesystem object)
+whose name is \fIpathname\fR. If \fIpathname\fR is a symbolic link on Unix,
then permissions of the file referred by this symbolic link are
tested.
.PP
-On success (all requested permissions granted), zero is returned. On
+On success (all requested permissions granted), zero is returned. On
error (at least one bit in mode asked for a permission that is denied,
-or some other error occurred), -1 is returned.
+or some other error occurred), -1 is returned.
.PP
-\fBTcl_FSStat\fR fills the stat structure \fIstatPtr\fR with information
-about the specified file. You do not need any access rights to the
+\fBTcl_FSStat\fR fills the \fITcl_StatBuf\fR structure \fIstatPtr\fR with
+information about the specified file. You do not need any access rights to the
file to get this information but you need search rights to all
-directories named in the path leading to the file. The stat structure
-includes info regarding device, inode (always 0 on Windows),
+directories named in the path leading to the file. The \fITcl_StatBuf\fR
+structure includes info regarding device, inode (always 0 on Windows),
privilege mode, nlink (always 1 on Windows), user id (always 0 on
Windows), group id (always 0 on Windows), rdev (same as device on
-Windows), size, last access time, last modification time, and creation
-time.
+Windows), size, last access time, last modification time, and
+last metadata change time.
+See \fBPORTABLE STAT RESULT API\fR for a description of how to write
+portable code to allocate and access the \fITcl_StatBuf\fR structure.
.PP
If \fIpath\fR exists, \fBTcl_FSStat\fR returns 0 and the stat structure
-is filled with data. Otherwise, -1 is returned, and no stat info is
+is filled with data. Otherwise, -1 is returned, and no stat info is
given.
.PP
\fBTcl_FSOpenFileChannel\fR opens a file specified by \fIpathPtr\fR and
leaves an error message in \fIinterp\fR's result after any error.
.PP
The newly created channel is not registered in the supplied interpreter; to
-register it, use \fBTcl_RegisterChannel\fR, described below.
-If one of the standard channels, \fBstdin, stdout\fR or \fBstderr\fR was
+register it, use \fBTcl_RegisterChannel\fR.
+If one of the standard channels, \fBstdin\fR, \fBstdout\fR or \fBstderr\fR was
previously closed, the act of creating the new channel also assigns it as a
replacement for the standard channel.
.PP
-\fBTcl_FSGetCwd\fR replaces the library version of getcwd().
+\fBTcl_FSGetCwd\fR replaces the library version of \fBgetcwd\fR.
.PP
-It returns the Tcl library's current working directory. This may be
-different to the native platform's working directory, in the case for
-which the cwd is not in the native filesystem.
+It returns the Tcl library's current working directory. This may be
+different to the native platform's working directory, which happens when
+the current working directory is not in the native filesystem.
.PP
The result is a pointer to a Tcl_Obj specifying the current directory,
-or NULL if the current directory could not be determined. If NULL is
-returned, an error message is left in the interp's result.
-
-The result already has its refCount incremented for the caller. When
-it is no longer needed, that refCount should be decremented. This is
+or NULL if the current directory could not be determined. If NULL is
+returned, an error message is left in the \fIinterp\fR's result.
+.PP
+The result already has its reference count incremented for the caller. When
+it is no longer needed, that reference count should be decremented. This is
needed for thread-safety purposes, to allow multiple threads to access
this and related functions, while ensuring the results are always
valid.
.PP
-\fBTcl_FSChdir\fR replaces the library version of chdir(). The path is
-normalized and then passed to the filesystem which claims it. If that
-filesystem does not implement this function, Tcl will fallback to a
-combination of stat and access to check whether the directory exists
-and has appropriate permissions.
-.PP
-For results, see chdir() documentation. If successful, we keep a
-record of the successful path in cwdPathPtr for subsequent calls to
-getcwd.
-.PP
-\fBTcl_FSPathSeparator\fR returns the separator character to be used for
-most specific element of the path specified by pathPtr (i.e. the last
-part of the path).
+\fBTcl_FSChdir\fR replaces the library version of \fBchdir\fR. The path is
+normalized and then passed to the filesystem which claims it. If that
+filesystem does not implement this function, Tcl will fallback to a
+combination of \fBstat\fR and \fBaccess\fR to check whether the directory
+exists and has appropriate permissions.
.PP
-The separator is returned as a Tcl_Obj containing a string of length
-1. If the path is invalid, NULL is returned.
+For results, see \fBchdir\fR documentation. If successful, we keep a
+record of the successful path in \fIcwdPathPtr\fR for subsequent calls to
+\fBTcl_FSGetCwd\fR.
.PP
-\fBTcl_FSJoinPath\fR takes the given Tcl_Obj, which should be a valid list,
-and returns the path object given by considering the first 'elements'
-elements as valid path segments. If elements < 0, we use the entire
-list.
+\fBTcl_FSPathSeparator\fR returns the separator character to be used for
+most specific element of the path specified by \fIpathPtr\fR (i.e.\ the last
+part of the path).
.PP
-Returns object with refCount of zero, containing the joined path.
+The separator is returned as a Tcl_Obj containing a string of length
+1. If the path is invalid, NULL is returned.
+.PP
+\fBTcl_FSJoinPath\fR takes the given Tcl_Obj, which must be a valid
+list (which is allowed to have a reference count of zero), and returns the path
+value given by considering the first \fIelements\fR elements as valid path
+segments (each path segment may be a complete path, a partial path or
+just a single possible directory or file name). If any path segment is
+actually an absolute path, then all prior path segments are discarded.
+If \fIelements\fR is less than 0, we use the entire list.
+.PP
+It is possible that the returned value is actually an element
+of the given list, so the caller should be careful to increment the
+reference count of the result before freeing the list.
+.PP
+The returned value, typically with a reference count of zero (but it
+could be shared
+under some conditions), contains the joined path. The caller must
+add a reference count to the value before using it. In particular, the
+returned value could be an element of the given list, so freeing the
+list might free the value prematurely if no reference count has been taken.
+If the number of elements is zero, then the returned value will be
+an empty-string Tcl_Obj.
.PP
\fBTcl_FSSplitPath\fR takes the given Tcl_Obj, which should be a valid path,
-and returns a Tcl List object containing each segment of that path as
+and returns a Tcl list value containing each segment of that path as
an element.
-.PP
-Returns list object with refCount of zero. If the passed in lenPtr is
-non-NULL, we use it to return the number of elements in the returned
-list.
+It returns a list value with a reference count of zero. If the
+passed in \fIlenPtr\fR is non-NULL, the variable it points to will be
+updated to contain the number of elements in the returned list.
.PP
\fBTcl_FSEqualPaths\fR tests whether the two paths given represent the same
-filesystem object
-.PP
-It returns 1 if the paths are equal, and 0 if they are different. If
+filesystem object.
+It returns 1 if the paths are equal, and 0 if they are different. If
either path is NULL, 0 is always returned.
.PP
\fBTcl_FSGetNormalizedPath\fR this important function attempts to extract
from the given Tcl_Obj a unique normalized path representation, whose
string value can be used as a unique identifier for the file.
.PP
-It returns the normalized path object, with refCount of zero, or NULL
-if the path was invalid or could otherwise not be successfully
-converted. Extraction of absolute, normalized paths is very
-efficient (because the filesystem operates on these representations
-internally), although the result when the filesystem contains
-numerous symbolic links may not be the most user-friendly
-version of a path.
-.PP
-\fBTcl_FSJoinToPath\fR takes the given object, which should usually be a
+It returns the normalized path value, owned by Tcl, or NULL if the path
+was invalid or could otherwise not be successfully converted.
+Extraction of absolute, normalized paths is very efficient (because the
+filesystem operates on these representations internally), although the
+result when the filesystem contains numerous symbolic links may not be
+the most user-friendly version of a path. The return value is owned by
+Tcl and has a lifetime equivalent to that of the \fIpathPtr\fR passed in
+(unless that is a relative path, in which case the normalized path
+value may be freed any time the cwd changes) - the caller can of
+course increment the reference count if it wishes to maintain a copy for longer.
+.PP
+\fBTcl_FSJoinToPath\fR takes the given value, which should usually be a
valid path or NULL, and joins onto it the array of paths segments
given.
.PP
-Returns object with refCount of zero, containing the joined path.
+Returns a value, typically with reference count of zero (but it could be shared
+under some conditions), containing the joined path. The caller must
+add a reference count to the value before using it. If any of the values
+passed into this function (\fIpathPtr\fR or \fIpath\fR elements) have
+a reference count
+of zero, they will be freed when this function returns.
.PP
\fBTcl_FSConvertToPathType\fR tries to convert the given Tcl_Obj to a valid
Tcl path type, taking account of the fact that the cwd may have changed
-even if this object is already supposedly of the correct type.
-The filename may begin with "~" (to indicate current user's home
-directory) or "~<user>" (to indicate any user's home directory).
-.PP
-If the conversion succeeds (i.e. the object is a valid path in one of
-the current filesystems), then TCL_OK is returned. Otherwise
-TCL_ERROR is returned, and an error message may
+even if this value is already supposedly of the correct type.
+The filename may begin with
+.QW ~
+(to indicate current user's home directory) or
+.QW ~<user>
+(to indicate any user's home directory).
+.PP
+If the conversion succeeds (i.e.\ the value is a valid path in one of
+the current filesystems), then \fBTCL_OK\fR is returned. Otherwise
+\fBTCL_ERROR\fR is returned, and an error message may
be left in the interpreter.
.PP
\fBTcl_FSGetInternalRep\fR extracts the internal representation of a given
-path object, in the given filesystem. If the path object belongs to a
+path value, in the given filesystem. If the path value belongs to a
different filesystem, we return NULL. If the internal representation is
currently NULL, we attempt to generate it, by calling the filesystem's
\fBTcl_FSCreateInternalRepProc\fR.
.PP
-Returns NULL or a valid internal path representation. This internal
+Returns NULL or a valid internal path representation. This internal
representation is cached, so that repeated calls to this function will
not require additional conversions.
.PP
\fBTcl_FSGetTranslatedPath\fR attempts to extract the translated path
-from the given Tcl_Obj.
-.PP
-If the translation succeeds (i.e. the object is a valid path), then it is
-returned. Otherwise NULL will be returned, and an error message may be
-left in the interpreter. A "translated" path is one which contains no
-"~" or "~user" sequences (these have been expanded to their current
-representation in the filesystem). The object returned is owned by the
-caller, which must store it or call Tcl_DecrRefCount to ensure memory is
-freed. This function is of little practical use, and
-\fBTcl_FSGetNormalizedPath\fR or \fBTcl_GetNativePath\fR are usually
+from the given Tcl_Obj.
+.PP
+If the translation succeeds (i.e.\ the value is a valid path), then it is
+returned. Otherwise NULL will be returned, and an error message may be
+left in the interpreter. A
+.QW translated
+path is one which contains no
+.QW ~
+or
+.QW ~user
+sequences (these have been expanded to their current
+representation in the filesystem). The value returned is owned by the
+caller, which must store it or call \fBTcl_DecrRefCount\fR to ensure memory is
+freed. This function is of little practical use, and
+\fBTcl_FSGetNormalizedPath\fR or \fBTcl_FSGetNativePath\fR are usually
better functions to use for most purposes.
.PP
\fBTcl_FSGetTranslatedStringPath\fR does the same as
\fBTcl_FSGetTranslatedPath\fR, but returns a character string or NULL.
The string returned is dynamically allocated and owned by the caller,
-which must store it or call ckfree to ensure it is freed. Again,
-\fBTcl_FSGetNormalizedPath\fR or \fBTcl_GetNativePath\fR are usually
+which must store it or call \fBckfree\fR to ensure it is freed. Again,
+\fBTcl_FSGetNormalizedPath\fR or \fBTcl_FSGetNativePath\fR are usually
better functions to use for most purposes.
.PP
-\fBTcl_FSNewNativePath\fR performs something like that reverse of the
-usual obj->path->nativerep conversions. If some code retrieves a path
-in native form (from, e.g. readlink or a native dialog), and that path
+\fBTcl_FSNewNativePath\fR performs something like the reverse of the
+usual obj->path->nativerep conversions. If some code retrieves a path
+in native form (from, e.g.\ \fBreadlink\fR or a native dialog), and that path
is to be used at the Tcl level, then calling this function is an
-efficient way of creating the appropriate path object type.
+efficient way of creating the appropriate path value type.
.PP
-The resulting object is a pure 'path' object, which will only receive
-a Utf-8 string representation if that is required by some Tcl code.
+The resulting value is a pure
+.QW path
+value, which will only receive
+a UTF-8 string representation if that is required by some Tcl code.
.PP
-\fBTcl_FSGetNativePath\fR is for use by the Win/Unix/MacOS native
+\fBTcl_FSGetNativePath\fR is for use by the Win/Unix native
filesystems, so that they can easily retrieve the native (char* or
-TCHAR*) representation of a path. This function is a convenience
-wrapper around \fBTcl_FSGetInternalRep\fR, and assumes the native
-representation is string-based. It may be desirable in the future
-to have non-string-based native representations (for example, on
-MacOS, a representation using a fileSpec of FSRef structure would
-probably be more efficient). On Windows a full Unicode
-representation would allow for paths of unlimited length. Currently
-the representation is simply a character string containing the
-complete, absolute path in the native encoding.
+TCHAR*) representation of a path. This function is a convenience
+wrapper around \fBTcl_FSGetInternalRep\fR. It may be desirable in the
+future to have non-string-based native representations (for example,
+on MacOSX, a representation using a fileSpec of FSRef structure would
+probably be more efficient). On Windows a full Unicode representation
+would allow for paths of unlimited length. Currently the representation
+is simply a character string which may contain either the relative path
+or a complete, absolute normalized path in the native encoding (complex
+conditions dictate which of these will be provided, so neither can be
+relied upon, unless the path is known to be absolute). If you need a
+native path which must be absolute, then you should ask for the native
+version of a normalized path. If for some reason a non-absolute,
+non-normalized version of the path is needed, that must be constructed
+separately (e.g.\ using \fBTcl_FSGetTranslatedPath\fR).
.PP
The native representation is cached so that repeated calls to this
-function will not require additional conversions.
-.PP
-\fBTcl_FSFileSystemInfo\fR returns a list of two elements. The first
-element is the name of the filesystem (e.g. "native" or "vfs" or "zip"
-or "prowrap", perhaps), and the second is the particular type of the
-given path within that filesystem (which is filesystem dependent). The
+function will not require additional conversions. The return value is
+owned by Tcl and has a lifetime equivalent to that of the \fIpathPtr\fR
+passed in (unless that is a relative path, in which case the native
+representation may be freed any time the cwd changes).
+.PP
+\fBTcl_FSFileSystemInfo\fR returns a list of two elements. The first
+element is the name of the filesystem (e.g.
+.QW native ,
+.QW vfs ,
+.QW zip ,
+or
+.QW prowrap ,
+perhaps), and the second is the particular type of the
+given path within that filesystem (which is filesystem dependent). The
second element may be empty if the filesystem does not provide a
further categorization of files.
.PP
-A valid list object is returned, unless the path object is not
+A valid list value is returned, unless the path value is not
recognized, when NULL will be returned.
.PP
-\fBTcl_FSGetFileSystemForPath\fR returns the a pointer to the
+\fBTcl_FSGetFileSystemForPath\fR returns a pointer to the
\fBTcl_Filesystem\fR which accepts this path as valid.
.PP
If no filesystem will accept the path, NULL is returned.
.PP
-\fBTcl_FSGetPathType\fR determines whether the given path is relative
+\fBTcl_FSGetPathType\fR determines whether the given path is relative
to the current directory, relative to the current volume, or
absolute.
.PP
-It returns one of TCL_PATH_ABSOLUTE, TCL_PATH_RELATIVE, or
-TCL_PATH_VOLUME_RELATIVE
-.PP
-\fBTcl_AllocStatBuf\fR allocates a \fITcl_StatBuf\fR on the system
-heap (which may be deallocated by being passed to \fBckfree\fR.) This
-allows extensions to invoke \fBTcl_FSStat\fR and \fBTcl_FSLStat\fR
-without being dependent on the size of the buffer. That in turn
-depends on the flags used to build Tcl.
-.PP
-.SH TCL_FILESYSTEM
+It returns one of \fBTCL_PATH_ABSOLUTE\fR, \fBTCL_PATH_RELATIVE\fR, or
+\fBTCL_PATH_VOLUME_RELATIVE\fR
+.SS "PORTABLE STAT RESULT API"
+.PP
+\fBTcl_AllocStatBuf\fR allocates a \fITcl_StatBuf\fR on the system heap (which
+may be deallocated by being passed to \fBckfree\fR). This allows extensions to
+invoke \fBTcl_FSStat\fR and \fBTcl_FSLstat\fR without being dependent on the
+size of the buffer. That in turn depends on the flags used to build Tcl.
+.PP
+.VS 8.6
+The portable fields of a \fITcl_StatBuf\fR may be read using the following
+functions, each of which returns the value of the corresponding field listed
+in the table below. Note that on some platforms there may be other fields in
+the \fITcl_StatBuf\fR as it is an alias for a suitable system structure, but
+only the portable ones are made available here. See your system documentation
+for a full description of these fields.
+.DS
+.ta \w'\fBTcl_GetModificationTimeFromStat\fR\0\0\0\0'u
+\fIAccess Function\fR \fIField\fR
+ \fBTcl_GetFSDeviceFromStat\fR st_dev
+ \fBTcl_GetFSInodeFromStat\fR st_ino
+ \fBTcl_GetModeFromStat\fR st_mode
+ \fBTcl_GetLinkCountFromStat\fR st_nlink
+ \fBTcl_GetUserIdFromStat\fR st_uid
+ \fBTcl_GetGroupIdFromStat\fR st_gid
+ \fBTcl_GetDeviceTypeFromStat\fR st_rdev
+ \fBTcl_GetAccessTimeFromStat\fR st_atime
+ \fBTcl_GetModificationTimeFromStat\fR st_mtime
+ \fBTcl_GetChangeTimeFromStat\fR st_ctime
+ \fBTcl_GetSizeFromStat\fR st_size
+ \fBTcl_GetBlocksFromStat\fR st_blocks
+ \fBTcl_GetBlockSizeFromStat\fR st_blksize
+.DE
+.VE 8.6
+.SH "THE VIRTUAL FILESYSTEM API"
.PP
A filesystem provides a \fBTcl_Filesystem\fR structure that contains
pointers to functions that implement the various operations on a
filesystem; these operations are invoked as needed by the generic
-layer, which generally occurs through the functions listed above.
+layer, which generally occurs through the functions listed above.
.PP
The \fBTcl_Filesystem\fR structures are manipulated using the following
methods.
.PP
\fBTcl_FSRegister\fR takes a pointer to a filesystem structure and an
-optional piece of data to associated with that filesystem. On calling
+optional piece of data to associated with that filesystem. On calling
this function, Tcl will attach the filesystem to the list of known
-filesystems, and it will become fully functional immediately. Tcl does
+filesystems, and it will become fully functional immediately. Tcl does
not check if the same filesystem is registered multiple times (and in
-general that is not a good thing to do). TCL_OK will be returned.
+general that is not a good thing to do). \fBTCL_OK\fR will be returned.
.PP
\fBTcl_FSUnregister\fR removes the given filesystem structure from
-the list of known filesystems, if it is known, and returns TCL_OK. If
-the filesystem is not currently registered, TCL_ERROR is returned.
+the list of known filesystems, if it is known, and returns \fBTCL_OK\fR. If
+the filesystem is not currently registered, \fBTCL_ERROR\fR is returned.
.PP
-\fBTcl_FSData\fR will return the ClientData associated with the given
-filesystem, if that filesystem is registered. Otherwise it will
+\fBTcl_FSData\fR will return the ClientData associated with the given
+filesystem, if that filesystem is registered. Otherwise it will
return NULL.
.PP
\fBTcl_FSMountsChanged\fR is used to inform the Tcl's core that
the set of mount points for the given (already registered) filesystem
have changed, and that cached file representations may therefore no
longer be correct.
+.SS "THE TCL_FILESYSTEM STRUCTURE"
.PP
The \fBTcl_Filesystem\fR structure contains the following fields:
+.PP
.CS
typedef struct Tcl_Filesystem {
- CONST char *\fItypeName\fR;
- int \fIstructureLength\fR;
- Tcl_FSVersion \fIversion\fR;
+ const char *\fItypeName\fR;
+ int \fIstructureLength\fR;
+ Tcl_FSVersion \fIversion\fR;
Tcl_FSPathInFilesystemProc *\fIpathInFilesystemProc\fR;
Tcl_FSDupInternalRepProc *\fIdupInternalRepProc\fR;
Tcl_FSFreeInternalRepProc *\fIfreeInternalRepProc\fR;
Tcl_FSInternalToNormalizedProc *\fIinternalToNormalizedProc\fR;
Tcl_FSCreateInternalRepProc *\fIcreateInternalRepProc\fR;
- Tcl_FSNormalizePathProc *\fInormalizePathProc\fR;
+ Tcl_FSNormalizePathProc *\fInormalizePathProc\fR;
Tcl_FSFilesystemPathTypeProc *\fIfilesystemPathTypeProc\fR;
Tcl_FSFilesystemSeparatorProc *\fIfilesystemSeparatorProc\fR;
- Tcl_FSStatProc *\fIstatProc\fR;
- Tcl_FSAccessProc *\fIaccessProc\fR;
- Tcl_FSOpenFileChannelProc *\fIopenFileChannelProc\fR;
- Tcl_FSMatchInDirectoryProc *\fImatchInDirectoryProc\fR;
- Tcl_FSUtimeProc *\fIutimeProc\fR;
- Tcl_FSLinkProc *\fIlinkProc\fR;
- Tcl_FSListVolumesProc *\fIlistVolumesProc\fR;
+ Tcl_FSStatProc *\fIstatProc\fR;
+ Tcl_FSAccessProc *\fIaccessProc\fR;
+ Tcl_FSOpenFileChannelProc *\fIopenFileChannelProc\fR;
+ Tcl_FSMatchInDirectoryProc *\fImatchInDirectoryProc\fR;
+ Tcl_FSUtimeProc *\fIutimeProc\fR;
+ Tcl_FSLinkProc *\fIlinkProc\fR;
+ Tcl_FSListVolumesProc *\fIlistVolumesProc\fR;
Tcl_FSFileAttrStringsProc *\fIfileAttrStringsProc\fR;
Tcl_FSFileAttrsGetProc *\fIfileAttrsGetProc\fR;
Tcl_FSFileAttrsSetProc *\fIfileAttrsSetProc\fR;
- Tcl_FSCreateDirectoryProc *\fIcreateDirectoryProc\fR;
- Tcl_FSRemoveDirectoryProc *\fIremoveDirectoryProc\fR;
- Tcl_FSDeleteFileProc *\fIdeleteFileProc\fR;
- Tcl_FSCopyFileProc *\fIcopyFileProc\fR;
- Tcl_FSRenameFileProc *\fIrenameFileProc\fR;
- Tcl_FSCopyDirectoryProc *\fIcopyDirectoryProc\fR;
- Tcl_FSLstatProc *\fIlstatProc\fR;
- Tcl_FSLoadFileProc *\fIloadFileProc\fR;
- Tcl_FSGetCwdProc *\fIgetCwdProc\fR;
- Tcl_FSChdirProc *\fIchdirProc\fR;
-} Tcl_Filesystem;
+ Tcl_FSCreateDirectoryProc *\fIcreateDirectoryProc\fR;
+ Tcl_FSRemoveDirectoryProc *\fIremoveDirectoryProc\fR;
+ Tcl_FSDeleteFileProc *\fIdeleteFileProc\fR;
+ Tcl_FSCopyFileProc *\fIcopyFileProc\fR;
+ Tcl_FSRenameFileProc *\fIrenameFileProc\fR;
+ Tcl_FSCopyDirectoryProc *\fIcopyDirectoryProc\fR;
+ Tcl_FSLstatProc *\fIlstatProc\fR;
+ Tcl_FSLoadFileProc *\fIloadFileProc\fR;
+ Tcl_FSGetCwdProc *\fIgetCwdProc\fR;
+ Tcl_FSChdirProc *\fIchdirProc\fR;
+} \fBTcl_Filesystem\fR;
.CE
.PP
Except for the first three fields in this structure which contain
complete filesystem is provided), and efficiency functions (which need
only be implemented if they can be done so efficiently, or if they have
side-effects which are required by the filesystem; Tcl has less
-efficient emulations it can fall back on). It is important to note
+efficient emulations it can fall back on). It is important to note
that, in the current version of Tcl, most of these fallbacks are only
used to handle commands initiated in Tcl, not in C. What this means is,
-that if a 'file rename' command is issued in Tcl, and the relevant
+that if a \fBfile rename\fR command is issued in Tcl, and the relevant
filesystem(s) do not implement their \fITcl_FSRenameFileProc\fR, Tcl's
core will instead fallback on a combination of other filesystem
functions (it will use \fITcl_FSCopyFileProc\fR followed by
\fITcl_FSDeleteFileProc\fR, and if \fITcl_FSCopyFileProc\fR is not
-implemented there is a further fallback). However, if a
-\fITcl_FSRenameFile\fR command is issued at the C level, no such
-fallbacks occur. This is true except for the last four entries in the
-filesystem table (lstat, load, getcwd and chdir)
+implemented there is a further fallback). However, if a
+\fITcl_FSRenameFileProc\fR command is issued at the C level, no such
+fallbacks occur. This is true except for the last four entries in the
+filesystem table (\fBlstat\fR, \fBload\fR, \fBgetcwd\fR and \fBchdir\fR)
for which fallbacks do in fact occur at the C level.
.PP
-As an example, here is the filesystem lookup table used by the
-"vfs" extension which allows filesystem actions to be implemented
-in Tcl.
+Any functions which take path names in Tcl_Obj form take
+those names in UTF\-8 form. The filesystem infrastructure API is
+designed to support efficient, cached conversion of these UTF\-8 paths
+to other native representations.
+.SS "EXAMPLE FILESYSTEM DEFINITION"
+.PP
+Here is the filesystem lookup table used by the
+.QW vfs
+extension which allows filesystem actions to be implemented in Tcl.
+.PP
.CS
static Tcl_Filesystem vfsFilesystem = {
"tclvfs",
&VfsPathInFilesystem,
&VfsDupInternalRep,
&VfsFreeInternalRep,
- /* No internal to normalized, since we don't create any
- * pure 'internal' Tcl_Obj path representations */
+ /* No internal to normalized, since we don't create
+ * any pure 'internal' Tcl_Obj path representations */
NULL,
- /* No create native rep function, since we don't use it
- * and don't choose to support uses of 'Tcl_FSNewNativePath' */
+ /* No create native rep function, since we don't use
+ * it and don't choose to support uses of
+ * Tcl_FSNewNativePath */
NULL,
- /* Normalize path isn't needed - we assume paths only have
- * one representation */
+ /* Normalize path isn't needed - we assume paths only
+ * have one representation */
NULL,
&VfsFilesystemPathType,
&VfsFilesystemSeparator,
&VfsOpenFileChannel,
&VfsMatchInDirectory,
&VfsUtime,
- /* We choose not to support symbolic links inside our vfs's */
+ /* We choose not to support symbolic links inside our
+ * VFS's */
NULL,
&VfsListVolumes,
&VfsFileAttrStrings,
&VfsFileAttrsGet,
&VfsFileAttrsSet,
&VfsCreateDirectory,
- &VfsRemoveDirectory,
+ &VfsRemoveDirectory,
&VfsDeleteFile,
- /* No copy file - fallback will occur at Tcl level */
+ /* No copy file; use the core fallback mechanism */
+ NULL,
+ /* No rename file; use the core fallback mechanism */
NULL,
- /* No rename file - fallback will occur at Tcl level */
+ /* No copy directory; use the core fallback mechanism */
NULL,
- /* No copy directory - fallback will occur at Tcl level */
- NULL,
/* Core will use stat for lstat */
NULL,
- /* No load - fallback on core implementation */
+ /* No load; use the core fallback mechanism */
NULL,
- /* We don't need a getcwd or chdir - fallback on Tcl's versions */
+ /* We don't need a getcwd or chdir; the core's own
+ * internal value is suitable */
NULL,
NULL
};
.CE
+.SH "FILESYSTEM INFRASTRUCTURE"
.PP
-Any functions which take path names in Tcl_Obj form take
-those names in UTF\-8 form. The filesystem infrastructure API is
-designed to support efficient, cached conversion of these UTF\-8 paths
-to other native representations.
-.SH TYPENAME
+These fields contain basic information about the filesystem structure
+and addresses of functions which are used to associate
+a particular filesystem with a file path, and deal with the internal
+handling of path representations, for example copying and freeing such
+representations.
+.SS TYPENAME
.PP
The \fItypeName\fR field contains a null-terminated string that
identifies the type of the filesystem implemented, e.g.
-\fBnative\fR or \fBzip\fR or \fBvfs\fR.
-.PP
-.SH "STRUCTURE LENGTH"
+.QW native ,
+.QW zip
+or
+.QW vfs .
+.SS "STRUCTURE LENGTH"
.PP
The \fIstructureLength\fR field is generally implemented as
\fIsizeof(Tcl_Filesystem)\fR, and is there to allow easier
binary backwards compatibility if the size of the structure
changes in a future Tcl release.
-.SH VERSION
+.SS VERSION
.PP
The \fIversion\fR field should be set to \fBTCL_FILESYSTEM_VERSION_1\fR.
-.SH "FILESYSTEM INFRASTRUCTURE"
-.PP
-These fields contain addresses of functions which are used to associate
-a particular filesystem with a file path, and deal with the internal
-handling of path representations, for example copying and freeing such
-representations.
-.SH PATHINFILESYSTEMPROC
+.SS PATHINFILESYSTEMPROC
.PP
The \fIpathInFilesystemProc\fR field contains the address of a function
-which is called to determine whether a given path object belongs to this
-filesystem or not. Tcl will only call the rest of the filesystem
+which is called to determine whether a given path value belongs to this
+filesystem or not. Tcl will only call the rest of the filesystem
functions with a path for which this function has returned \fBTCL_OK\fR.
-If the path does not belong, -1 should be returned (the behaviour of Tcl
-for any other return value is not defined). If \fBTCL_OK\fR is returned,
-then the optional \fBclientDataPtr\fR output parameter can be used to
+If the path does not belong, -1 should be returned (the behavior of Tcl
+for any other return value is not defined). If \fBTCL_OK\fR is returned,
+then the optional \fIclientDataPtr\fR output parameter can be used to
return an internal (filesystem specific) representation of the path,
-which will be cached inside the path object, and may be retrieved
-efficiently by the other filesystem functions. Tcl will simultaneously
-cache the fact that this path belongs to this filesystem. Such caches
+which will be cached inside the path value, and may be retrieved
+efficiently by the other filesystem functions. Tcl will simultaneously
+cache the fact that this path belongs to this filesystem. Such caches
are invalidated when filesystem structures are added or removed from
Tcl's internal list of known filesystems.
.PP
.CS
-typedef int Tcl_FSPathInFilesystemProc(
- Tcl_Obj *\fIpathPtr\fR,
- ClientData *\fIclientDataPtr\fR);
+typedef int \fBTcl_FSPathInFilesystemProc\fR(
+ Tcl_Obj *\fIpathPtr\fR,
+ ClientData *\fIclientDataPtr\fR);
.CE
-.SH DUPINTERNALREPPROC
+.SS DUPINTERNALREPPROC
.PP
This function makes a copy of a path's internal representation, and is
-called when Tcl needs to duplicate a path object. If NULL, Tcl will
+called when Tcl needs to duplicate a path value. If NULL, Tcl will
simply not copy the internal representation, which may then need to be
regenerated later.
.PP
.CS
-typedef ClientData Tcl_FSDupInternalRepProc(
- ClientData \fIclientData\fR);
+typedef ClientData \fBTcl_FSDupInternalRepProc\fR(
+ ClientData \fIclientData\fR);
.CE
-.SH FREEINTERNALREPPROC
-Free the internal representation. This must be implemented if internal
-representations need freeing (i.e. if some memory is allocated when an
+.SS FREEINTERNALREPPROC
+Free the internal representation. This must be implemented if internal
+representations need freeing (i.e.\ if some memory is allocated when an
internal representation is generated), but may otherwise be NULL.
.PP
.CS
-typedef void Tcl_FSFreeInternalRepProc(
- ClientData \fIclientData\fR);
+typedef void \fBTcl_FSFreeInternalRepProc\fR(
+ ClientData \fIclientData\fR);
.CE
-.SH INTERNALTONORMALIZEDPROC
+.SS INTERNALTONORMALIZEDPROC
.PP
-Function to convert internal representation to a normalized path. Only
-required if the filesystem creates pure path objects with no string/path
-representation. The return value is a Tcl object whose string
+Function to convert internal representation to a normalized path. Only
+required if the filesystem creates pure path values with no string/path
+representation. The return value is a Tcl value whose string
representation is the normalized path.
.PP
.CS
-typedef Tcl_Obj* Tcl_FSInternalToNormalizedProc(
- ClientData \fIclientData\fR);
+typedef Tcl_Obj *\fBTcl_FSInternalToNormalizedProc\fR(
+ ClientData \fIclientData\fR);
.CE
-.SH CREATEINTERNALREPPROC
+.SS CREATEINTERNALREPPROC
.PP
-Function to take a path object, and calculate an internal
+Function to take a path value, and calculate an internal
representation for it, and store that native representation in the
-object. May be NULL if paths have no internal representation, or if
+value. May be NULL if paths have no internal representation, or if
the \fITcl_FSPathInFilesystemProc\fR for this filesystem always
immediately creates an internal representation for paths it accepts.
.PP
.CS
-typedef ClientData Tcl_FSCreateInternalRepProc(
- Tcl_Obj *\fIpathPtr\fR);
+typedef ClientData \fBTcl_FSCreateInternalRepProc\fR(
+ Tcl_Obj *\fIpathPtr\fR);
.CE
-.SH NORMALIZEPATHPROC
+.SS NORMALIZEPATHPROC
.PP
-Function to normalize a path. Should be implemented for all
+Function to normalize a path. Should be implemented for all
filesystems which can have multiple string representations for the same
-path object. In Tcl, every 'path' must have a single unique 'normalized'
-string representation. Depending on the filesystem,
+path value. In Tcl, every
+.QW path
+must have a single unique
+.QW normalized
+string representation. Depending on the filesystem,
there may be more than one unnormalized string representation which
-refers to that path (e.g. a relative path, a path with different
+refers to that path (e.g.\ a relative path, a path with different
character case if the filesystem is case insensitive, a path contain a
-reference to a home directory such as '~', a path containing symbolic
-links, etc). If the very last component in the path is a symbolic
-link, it should not be converted into the object it points to (but
-its case or other aspects should be made unique). All other path
-components should be converted from symbolic links. This one
-exception is required to agree with Tcl's semantics with 'file
-delete', 'file rename', 'file copy' operating on symbolic links.
-This function may be called with 'nextCheckpoint' either
-at the beginning of the path (i.e. zero), at the end of the path, or
-at any intermediate file separator in the path. It will never
+reference to a home directory such as
+.QW ~ ,
+a path containing symbolic
+links, etc). If the very last component in the path is a symbolic
+link, it should not be converted into the value it points to (but
+its case or other aspects should be made unique). All other path
+components should be converted from symbolic links. This one
+exception is required to agree with Tcl's semantics with \fBfile
+delete\fR, \fBfile rename\fR, \fBfile copy\fR operating on symbolic links.
+This function may be called with \fInextCheckpoint\fR either
+at the beginning of the path (i.e.\ zero), at the end of the path, or
+at any intermediate file separator in the path. It will never
point to any other arbitrary position in the path. In the last of
-the three valid cases, the implementation can assume that the path
+the three valid cases, the implementation can assume that the path
up to and including the file separator is known and normalized.
.PP
.CS
-typedef int Tcl_FSNormalizePathProc(
- Tcl_Interp *\fIinterp\fR,
- Tcl_Obj *\fIpathPtr\fR,
- int \fInextCheckpoint\fR);
+typedef int \fBTcl_FSNormalizePathProc\fR(
+ Tcl_Interp *\fIinterp\fR,
+ Tcl_Obj *\fIpathPtr\fR,
+ int \fInextCheckpoint\fR);
.CE
.SH "FILESYSTEM OPERATIONS"
.PP
The fields in this section of the structure contain addresses of
functions which are called to carry out the basic filesystem
-operations. A filesystem which expects to be used with the complete
-standard Tcl command set must implement all of these. If some of
+operations. A filesystem which expects to be used with the complete
+standard Tcl command set must implement all of these. If some of
them are not implemented, then certain Tcl commands may fail when
-operating on paths within that filesystem. However, in some instances
+operating on paths within that filesystem. However, in some instances
this may be desirable (for example, a read-only filesystem should not
implement the last four functions, and a filesystem which does not
support symbolic links need not implement the \fBreadlink\fR function,
-etc. The Tcl core expects filesystems to behave in this way).
-.SH FILESYSTEMPATHTYPEPROC
+etc. The Tcl core expects filesystems to behave in this way).
+.SS FILESYSTEMPATHTYPEPROC
.PP
-Function to determine the type of a path in this filesystem. May be
+Function to determine the type of a path in this filesystem. May be
NULL, in which case no type information will be available to users of
-the filesystem. The 'type' is used only for informational purposes,
+the filesystem. The
+.QW type
+is used only for informational purposes,
and should be returned as the string representation of the Tcl_Obj
-which is returned. A typical return value might be "networked", "zip"
-or "ftp". The Tcl_Obj result is owned by the filesystem and so Tcl will
-increment the refCount of that object if it wishes to retain a reference
+which is returned. A typical return value might be
+.QW networked ,
+.QW zip
+or
+.QW ftp .
+The Tcl_Obj result is owned by the filesystem and so Tcl will
+increment the reference count of that value if it wishes to retain a reference
to it.
.PP
.CS
-typedef Tcl_Obj* Tcl_FSFilesystemPathTypeProc(
- Tcl_Obj *\fIpathPtr\fR);
+typedef Tcl_Obj *\fBTcl_FSFilesystemPathTypeProc\fR(
+ Tcl_Obj *\fIpathPtr\fR);
.CE
-.SH FILESYSTEMSEPARATORPROC
+.SS FILESYSTEMSEPARATORPROC
.PP
Function to return the separator character(s) for this filesystem.
-Must be implemented, otherwise the \fBfile separator\fR command will not
-function correctly. The usual return value will be a Tcl_Obj
-containing the string "/".
+This need only be implemented if the filesystem wishes to use a
+different separator than the standard string
+.QW / .
+Amongst other
+uses, it is returned by the \fBfile separator\fR command. The
+return value should be a value with reference count of zero.
.PP
.CS
-typedef Tcl_Obj* Tcl_FSFilesystemSeparatorProc(
- Tcl_Obj *\fIpathPtr\fR);
+typedef Tcl_Obj *\fBTcl_FSFilesystemSeparatorProc\fR(
+ Tcl_Obj *\fIpathPtr\fR);
.CE
-.SH STATPROC
+.SS STATPROC
.PP
-Function to process a \fBTcl_FSStat()\fR call. Must be implemented for any
-reasonable filesystem, since many Tcl level commands depend crucially
-upon it (e.g. \fBfile atime\fR, \fBfile isdirectory\fR, \fBfile size\fR,
+Function to process a \fBTcl_FSStat\fR call. Must be implemented for any
+reasonable filesystem, since many Tcl level commands depend crucially
+upon it (e.g.\ \fBfile atime\fR, \fBfile isdirectory\fR, \fBfile size\fR,
\fBglob\fR).
.PP
.CS
-typedef int Tcl_FSStatProc(
- Tcl_Obj *\fIpathPtr\fR,
- Tcl_StatBuf *\fIstatPtr\fR);
+typedef int \fBTcl_FSStatProc\fR(
+ Tcl_Obj *\fIpathPtr\fR,
+ Tcl_StatBuf *\fIstatPtr\fR);
.CE
.PP
The \fBTcl_FSStatProc\fR fills the stat structure \fIstatPtr\fR with
-information about the specified file. You do not need any access
+information about the specified file. You do not need any access
rights to the file to get this information but you need search rights
-to all directories named in the path leading to the file. The stat
+to all directories named in the path leading to the file. The stat
structure includes info regarding device, inode (always 0 on Windows),
privilege mode, nlink (always 1 on Windows), user id (always 0 on
Windows), group id (always 0 on Windows), rdev (same as device on
-Windows), size, last access time, last modification time, and creation
-time.
+Windows), size, last access time, last modification time, and
+last metadata change time.
.PP
If the file represented by \fIpathPtr\fR exists, the
\fBTcl_FSStatProc\fR returns 0 and the stat structure is filled with
-data. Otherwise, -1 is returned, and no stat info is given.
-.SH ACCESSPROC
+data. Otherwise, -1 is returned, and no stat info is given.
+.SS ACCESSPROC
.PP
-Function to process a \fBTcl_FSAccess()\fR call. Must be implemented for
-any reasonable filesystem, since many Tcl level commands depend crucially
-upon it (e.g. \fBfile exists\fR, \fBfile readable\fR).
+Function to process a \fBTcl_FSAccess\fR call. Must be implemented for
+any reasonable filesystem, since many Tcl level commands depend crucially
+upon it (e.g.\ \fBfile exists\fR, \fBfile readable\fR).
.PP
.CS
-typedef int Tcl_FSAccessProc(
- Tcl_Obj *\fIpathPtr\fR,
- int \fImode\fR);
+typedef int \fBTcl_FSAccessProc\fR(
+ Tcl_Obj *\fIpathPtr\fR,
+ int \fImode\fR);
.CE
.PP
The \fBTcl_FSAccessProc\fR checks whether the process would be allowed
-to read, write or test for existence of the file (or other file system
-object) whose name is pathname. If pathname is a symbolic link, then
+to read, write or test for existence of the file (or other filesystem
+object) whose name is in \fIpathPtr\fR. If the pathname refers to a
+symbolic link, then the
permissions of the file referred by this symbolic link should be tested.
.PP
-On success (all requested permissions granted), zero is returned. On
+On success (all requested permissions granted), zero is returned. On
error (at least one bit in mode asked for a permission that is denied,
or some other error occurred), -1 is returned.
+.SS OPENFILECHANNELPROC
.PP
-.SH OPENFILECHANNELPROC
-.PP
-Function to process a \fBTcl_FSOpenFileChannel()\fR call. Must be
+Function to process a \fBTcl_FSOpenFileChannel\fR call. Must be
implemented for any reasonable filesystem, since any operations
-which require open or accessing a file's contents will use it
-(e.g. \fBopen\fR, \fBencoding\fR, and many Tk commands).
+which require open or accessing a file's contents will use it
+(e.g.\ \fBopen\fR, \fBencoding\fR, and many Tk commands).
.PP
.CS
-typedef Tcl_Channel Tcl_FSOpenFileChannelProc(
- Tcl_Interp *\fIinterp\fR,
- Tcl_Obj *\fIpathPtr\fR,
- int \fImode\fR,
- int \fIpermissions\fR);
+typedef Tcl_Channel \fBTcl_FSOpenFileChannelProc\fR(
+ Tcl_Interp *\fIinterp\fR,
+ Tcl_Obj *\fIpathPtr\fR,
+ int \fImode\fR,
+ int \fIpermissions\fR);
.CE
.PP
The \fBTcl_FSOpenFileChannelProc\fR opens a file specified by
\fIpathPtr\fR and returns a channel handle that can be used to perform
-input and output on the file. This API is modeled after the \fBfopen\fR
-procedure of the Unix standard I/O library. The syntax and meaning of
+input and output on the file. This API is modeled after the \fBfopen\fR
+procedure of the Unix standard I/O library. The syntax and meaning of
all arguments is similar to those given in the Tcl \fBopen\fR command
when opening a file, where the \fImode\fR argument is a combination of
-the POSIX flags O_RDONLY, O_WRONLY, etc. If an error occurs while
+the POSIX flags O_RDONLY, O_WRONLY, etc. If an error occurs while
opening the channel, the \fBTcl_FSOpenFileChannelProc\fR returns NULL and
records a POSIX error code that can be retrieved with \fBTcl_GetErrno\fR.
In addition, if \fIinterp\fR is non-NULL, the
\fBTcl_FSOpenFileChannelProc\fR leaves an error message in \fIinterp\fR's
result after any error.
.PP
-The newly created channel is not registered in the supplied
-interpreter; to register it, use \fBTcl_RegisterChannel\fR. If one of
-the standard channels, \fBstdin, stdout\fR or \fBstderr\fR was
+The newly created channel must not be registered in the supplied interpreter
+by a \fBTcl_FSOpenFileChannelProc\fR; that task is up to the caller of
+\fBTcl_FSOpenFileChannel\fR (if necessary). If one of
+the standard channels, \fBstdin\fR, \fBstdout\fR or \fBstderr\fR was
previously closed, the act of creating the new channel also assigns it
as a replacement for the standard channel.
-.SH MATCHINDIRECTORYPROC
+.SS MATCHINDIRECTORYPROC
.PP
-Function to process a \fBTcl_FSMatchInDirectory()\fR call. If not
+Function to process a \fBTcl_FSMatchInDirectory\fR call. If not
implemented, then glob and recursive copy functionality will be lacking
-in the filesystem (and this may impact commands like 'encoding names'
+in the filesystem (and this may impact commands like \fBencoding names\fR
which use glob functionality internally).
.PP
.CS
-typedef int Tcl_FSMatchInDirectoryProc(
- Tcl_Interp* \fIinterp\fR,
- Tcl_Obj *\fIresult\fR,
- Tcl_Obj *\fIpathPtr\fR,
- CONST char *\fIpattern\fR,
- Tcl_GlobTypeData * \fItypes\fR);
+typedef int \fBTcl_FSMatchInDirectoryProc\fR(
+ Tcl_Interp *\fIinterp\fR,
+ Tcl_Obj *\fIresultPtr\fR,
+ Tcl_Obj *\fIpathPtr\fR,
+ const char *\fIpattern\fR,
+ Tcl_GlobTypeData *\fItypes\fR);
.CE
.PP
The function should return all files or directories (or other filesystem
objects) which match the given pattern and accord with the \fItypes\fR
-specification given. There are two ways in which this function may be
-called. If \fIpattern\fR is NULL, then \fIpathPtr\fR is a full path
+specification given. There are two ways in which this function may be
+called. If \fIpattern\fR is NULL, then \fIpathPtr\fR is a full path
specification of a single file or directory which should be checked for
-existence and correct type. Otherwise, \fIpathPtr\fR is a directory, the
+existence and correct type. Otherwise, \fIpathPtr\fR is a directory, the
contents of which the function should search for files or directories
-which have the correct type. In either case, \fIpathPtr\fR can be
-assumed to be both non-NULL and non-empty. It is not currently
+which have the correct type. In either case, \fIpathPtr\fR can be
+assumed to be both non-NULL and non-empty. It is not currently
documented whether \fIpathPtr\fR will have a file separator at its end of
not, so code should be flexible to both possibilities.
.PP
The return value is a standard Tcl result indicating whether an error
-occurred in the matching process. Error messages are placed in interp,
-but on a TCL_OK result, the interpreter should not be modified, but
-rather results should be added to the \fIresult\fR object given
-(which can be assumed to be a valid Tcl list). The matches added
-to \fIresult\fR should include any path prefix given in \fIpathPtr\fR
-(this usually means they will be absolute path specifications).
-Note that if no matches are found, that simply leads to an empty
-result --- errors are only signaled for actual file or filesystem
+occurred in the matching process. Error messages are placed in
+\fIinterp\fR, unless \fIinterp\fR in NULL in which case no error
+message need be generated; on a \fBTCL_OK\fR result, results should be
+added to the \fIresultPtr\fR value given (which can be assumed to be a
+valid unshared Tcl list). The matches added
+to \fIresultPtr\fR should include any path prefix given in \fIpathPtr\fR
+(this usually means they will be absolute path specifications).
+Note that if no matches are found, that simply leads to an empty
+result; errors are only signaled for actual file or filesystem
problems which may occur during the matching process.
-.SH UTIMEPROC
.PP
-Function to process a \fBTcl_FSUtime()\fR call. Required to allow setting
-(not reading) of times with 'file mtime', 'file atime' and the
-open-r/open-w/fcopy implementation of 'file copy'.
+The \fBTcl_GlobTypeData\fR structure passed in the \fItypes\fR
+parameter contains the following fields:
+.PP
+.CS
+typedef struct Tcl_GlobTypeData {
+ /* Corresponds to bcdpfls as in 'find -t' */
+ int \fItype\fR;
+ /* Corresponds to file permissions */
+ int \fIperm\fR;
+ /* Acceptable mac type */
+ Tcl_Obj *\fImacType\fR;
+ /* Acceptable mac creator */
+ Tcl_Obj *\fImacCreator\fR;
+} \fBTcl_GlobTypeData\fR;
+.CE
+.PP
+There are two specific cases which it is important to handle correctly,
+both when \fItypes\fR is non-NULL. The two cases are when \fItypes->types
+& TCL_GLOB_TYPE_DIR\fR or \fItypes->types & TCL_GLOB_TYPE_MOUNT\fR are
+true (and in particular when the other flags are false). In the first of
+these cases, the function must list the contained directories. Tcl uses
+this to implement recursive globbing, so it is critical that filesystems
+implement directory matching correctly. In the second of these cases,
+with \fBTCL_GLOB_TYPE_MOUNT\fR, the filesystem must list the mount points
+which lie within the given \fIpathPtr\fR (and in this case, \fIpathPtr\fR
+need not lie within the same filesystem - different to all other cases in
+which this function is called). Support for this is critical if Tcl is
+to have seamless transitions between from one filesystem to another.
+.SS UTIMEPROC
+.PP
+Function to process a \fBTcl_FSUtime\fR call. Required to allow setting
+(not reading) of times with \fBfile mtime\fR, \fBfile atime\fR and the
+open-r/open-w/fcopy implementation of \fBfile copy\fR.
.PP
.CS
-typedef int Tcl_FSUtimeProc(
- Tcl_Obj *\fIpathPtr\fR,
- struct utimbuf *\fItval\fR);
+typedef int \fBTcl_FSUtimeProc\fR(
+ Tcl_Obj *\fIpathPtr\fR,
+ struct utimbuf *\fItval\fR);
.CE
.PP
The access and modification times of the file specified by \fIpathPtr\fR
should be changed to the values given in the \fItval\fR structure.
.PP
-The return value is a standard Tcl result indicating whether an error
-occurred in the process.
-.SH LINKPROC
+The return value should be 0 on success and -1 on an error, as
+with the system \fButime\fR.
+.SS LINKPROC
.PP
-Function to process a \fBTcl_FSLink()\fR call. Should be implemented
+Function to process a \fBTcl_FSLink\fR call. Should be implemented
only if the filesystem supports links, and may otherwise be NULL.
.PP
.CS
-typedef Tcl_Obj* Tcl_FSLinkProc(
- Tcl_Obj *\fIlinkNamePtr\fR,
- Tcl_Obj *\fItoPtr\fR,
- int \fIlinkAction\fR);
+typedef Tcl_Obj *\fBTcl_FSLinkProc\fR(
+ Tcl_Obj *\fIlinkNamePtr\fR,
+ Tcl_Obj *\fItoPtr\fR,
+ int \fIlinkAction\fR);
.CE
.PP
If \fItoPtr\fR is NULL, the function is being asked to read the
-contents of a link. The result is a Tcl_Obj specifying the contents of
+contents of a link. The result is a Tcl_Obj specifying the contents of
the link given by \fIlinkNamePtr\fR, or NULL if the link could
-not be read. The result is owned by the caller, which should call
-Tcl_DecrRefCount when the result is no longer needed. If \fItoPtr\fR
-is not NULL, the function should attempt to create a link. The result
-in this case should be \fItoPtr\fR if the link was successful and NULL
-otherwise. In this case the result is not owned by the caller. See
+not be read. The result is owned by the caller (and should therefore
+have its ref count incremented before being returned). Any callers
+should call \fBTcl_DecrRefCount\fR on this result when it is no longer needed.
+If \fItoPtr\fR is not NULL, the function should attempt to create a link.
+The result in this case should be \fItoPtr\fR if the link was successful
+and NULL otherwise. In this case the result is not owned by the caller
+(i.e.\ no reference count manipulations on either end are needed). See
the documentation for \fBTcl_FSLink\fR for the correct interpretation
of the \fIlinkAction\fR flags.
-.SH LISTVOLUMESPROC
+.SS LISTVOLUMESPROC
.PP
Function to list any filesystem volumes added by this filesystem.
Should be implemented only if the filesystem adds volumes at the head
-of the filesystem, so that they can be returned by 'file volumes'.
+of the filesystem, so that they can be returned by \fBfile volumes\fR.
.PP
.CS
-typedef Tcl_Obj* Tcl_FSListVolumesProc(void);
+typedef Tcl_Obj *\fBTcl_FSListVolumesProc\fR(void);
.CE
.PP
The result should be a list of volumes added by this filesystem, or
-NULL (or an empty list) if no volumes are provided. The result object
+NULL (or an empty list) if no volumes are provided. The result value
is considered to be owned by the filesystem (not by Tcl's core), but
-should be given a refCount for Tcl. Tcl will use the contents of the
-list and then decrement that refCount. This allows filesystems to
-choose whether they actually want to retain a 'master list' of volumes
+should be given a reference count for Tcl. Tcl will use the contents of the
+list and then decrement that reference count. This allows filesystems to
+choose whether they actually want to retain a
+.QW "master list"
+of volumes
or not (if not, they generate the list on the fly and pass it to Tcl
-with a refCount of 1 and then forget about the list, if yes, then
-they simply increment the refCount of their master list and pass it
+with a reference count of 1 and then forget about the list, if yes, then
+they simply increment the reference count of their master list and pass it
to Tcl which will copy the contents and then decrement the count back
to where it was).
.PP
Therefore, Tcl considers return values from this proc to be read-only.
-.PP
-.SH FILEATTRSTRINGSPROC
+.SS FILEATTRSTRINGSPROC
.PP
Function to list all attribute strings which are valid for this
-filesystem. If not implemented the filesystem will not support
-the \fBfile attributes\fR command. This allows arbitrary additional
-information to be attached to files in the filesystem. If it is
+filesystem. If not implemented the filesystem will not support
+the \fBfile attributes\fR command. This allows arbitrary additional
+information to be attached to files in the filesystem. If it is
not implemented, there is no need to implement the \fBget\fR and \fBset\fR
methods.
.PP
.CS
-typedef CONST char** Tcl_FSFileAttrStringsProc(
- Tcl_Obj *\fIpathPtr\fR,
- Tcl_Obj** \fIobjPtrRef\fR);
+typedef const char *const *\fBTcl_FSFileAttrStringsProc\fR(
+ Tcl_Obj *\fIpathPtr\fR,
+ Tcl_Obj **\fIobjPtrRef\fR);
.CE
.PP
The called function may either return an array of strings, or may
-instead return NULL and place a Tcl list into the given objPtrRef. Tcl
-will take that list and first increment its refCount before using it.
-On completion of that use, Tcl will decrement its refCount. Hence if
+instead return NULL and place a Tcl list into the given \fIobjPtrRef\fR. Tcl
+will take that list and first increment its reference count before using it.
+On completion of that use, Tcl will decrement its reference count. Hence if
the list should be disposed of by Tcl when done, it should have a
-refCount of zero, and if the list should not be disposed of, the
-filesystem should ensure it retains a refCount on the object.
-.SH FILEATTRSGETPROC
+reference count of zero, and if the list should not be disposed of, the
+filesystem should ensure it returns a value with a reference count
+of at least one.
+.SS FILEATTRSGETPROC
.PP
-Function to process a \fBTcl_FSFileAttrsGet()\fR call, used by 'file
-attributes'.
+Function to process a \fBTcl_FSFileAttrsGet\fR call, used by \fBfile
+attributes\fR.
.PP
.CS
-typedef int Tcl_FSFileAttrsGetProc(
- Tcl_Interp *\fIinterp\fR,
- int \fIindex\fR,
- Tcl_Obj *\fIpathPtr\fR,
- Tcl_Obj **\fIobjPtrRef\fR);
+typedef int \fBTcl_FSFileAttrsGetProc\fR(
+ Tcl_Interp *\fIinterp\fR,
+ int \fIindex\fR,
+ Tcl_Obj *\fIpathPtr\fR,
+ Tcl_Obj **\fIobjPtrRef\fR);
.CE
.PP
-Returns a standard Tcl return code. The attribute value retrieved,
+Returns a standard Tcl return code. The attribute value retrieved,
which corresponds to the \fIindex\fR'th element in the list returned by
-the Tcl_FSFileAttrStringsProc, is a Tcl_Obj placed in objPtrRef (if
-TCL_OK was returned) and is likely to have a refCount of zero. Either
-way we must either store it somewhere (e.g. the Tcl result), or
-Incr/Decr its refCount to ensure it is properly freed.
-.SH FILEATTRSSETPROC
-.PP
-Function to process a \fBTcl_FSFileAttrsSet()\fR call, used by 'file
-attributes'. If the filesystem is read-only, there is no need
+the \fBTcl_FSFileAttrStringsProc\fR, is a Tcl_Obj placed in \fIobjPtrRef\fR (if
+\fBTCL_OK\fR was returned) and is likely to have a reference count of zero. Either
+way we must either store it somewhere (e.g.\ the Tcl result), or
+Incr/Decr its reference count to ensure it is properly freed.
+.SS FILEATTRSSETPROC
+.PP
+Function to process a \fBTcl_FSFileAttrsSet\fR call, used by \fBfile
+attributes\fR. If the filesystem is read-only, there is no need
to implement this.
.PP
.CS
-typedef int Tcl_FSFileAttrsSetProc(
- Tcl_Interp *\fIinterp\fR,
- int \fIindex\fR,
- Tcl_Obj *\fIpathPtr\fR,
- Tcl_Obj *\fIobjPtr\fR);
+typedef int \fBTcl_FSFileAttrsSetProc\fR(
+ Tcl_Interp *\fIinterp\fR,
+ int \fIindex\fR,
+ Tcl_Obj *\fIpathPtr\fR,
+ Tcl_Obj *\fIobjPtr\fR);
.CE
.PP
The attribute value of the \fIindex\fR'th element in the list returned by
the Tcl_FSFileAttrStringsProc should be set to the \fIobjPtr\fR given.
-.SH CREATEDIRECTORYPROC
+.SS CREATEDIRECTORYPROC
.PP
-Function to process a \fBTcl_FSCreateDirectory()\fR call. Should be
+Function to process a \fBTcl_FSCreateDirectory\fR call. Should be
implemented unless the FS is read-only.
.PP
.CS
-typedef int Tcl_FSCreateDirectoryProc(
- Tcl_Obj *\fIpathPtr\fR);
+typedef int \fBTcl_FSCreateDirectoryProc\fR(
+ Tcl_Obj *\fIpathPtr\fR);
.CE
.PP
The return value is a standard Tcl result indicating whether an error
-occurred in the process. If successful, a new directory should have
+occurred in the process. If successful, a new directory should have
been added to the filesystem in the location specified by
\fIpathPtr\fR.
-.SH REMOVEDIRECTORYPROC
+.SS REMOVEDIRECTORYPROC
.PP
-Function to process a 'Tcl_FSRemoveDirectory()' call. Should be
+Function to process a \fBTcl_FSRemoveDirectory\fR call. Should be
implemented unless the FS is read-only.
.PP
.CS
-typedef int Tcl_FSRemoveDirectoryProc(
- Tcl_Obj *\fIpathPtr\fR,
- int \fIrecursive\fR,
- Tcl_Obj **\fIerrorPtr\fR);
+typedef int \fBTcl_FSRemoveDirectoryProc\fR(
+ Tcl_Obj *\fIpathPtr\fR,
+ int \fIrecursive\fR,
+ Tcl_Obj **\fIerrorPtr\fR);
.CE
.PP
The return value is a standard Tcl result indicating whether an error
-occurred in the process. If successful, the directory specified by
-\fIpathPtr\fR should have been removed from the filesystem. If the
-\fIrecursive\fR flag is given, then a non-empty directory should
-be deleted without error. If an error does occur, the name of
-the file or directory which caused the error should be placed in
-\fIerrorPtr\fR.
-.SH DELETEFILEPROC
-.PP
-Function to process a \fBTcl_FSDeleteFile()\fR call. Should be implemented
+occurred in the process. If successful, the directory specified by
+\fIpathPtr\fR should have been removed from the filesystem. If the
+\fIrecursive\fR flag is given, then a non-empty directory should be
+deleted without error. If this flag is not given, then and the
+directory is non-empty a POSIX
+.QW EEXIST
+error should be signaled. If an
+error does occur, the name of the file or directory which caused the
+error should be placed in \fIerrorPtr\fR.
+.SS DELETEFILEPROC
+.PP
+Function to process a \fBTcl_FSDeleteFile\fR call. Should be implemented
unless the FS is read-only.
.PP
.CS
-typedef int Tcl_FSDeleteFileProc(
- Tcl_Obj *\fIpathPtr\fR);
+typedef int \fBTcl_FSDeleteFileProc\fR(
+ Tcl_Obj *\fIpathPtr\fR);
.CE
.PP
The return value is a standard Tcl result indicating whether an error
-occurred in the process. If successful, the file specified by
-\fIpathPtr\fR should have been removed from the filesystem. Note that,
+occurred in the process. If successful, the file specified by
+\fIpathPtr\fR should have been removed from the filesystem. Note that,
if the filesystem supports symbolic links, Tcl will always call this
function and not Tcl_FSRemoveDirectoryProc when needed to delete them
(even if they are symbolic links to directories).
.SH "FILESYSTEM EFFICIENCY"
.PP
-.SH LSTATPROC
+These functions need not be implemented for a particular filesystem
+because the core has a fallback implementation available. See each
+individual description for the consequences of leaving the field NULL.
+.SS LSTATPROC
.PP
-Function to process a \fBTcl_FSLstat()\fR call. If not implemented, Tcl
-will attempt to use the \fIstatProc\fR defined above instead. Therefore
+Function to process a \fBTcl_FSLstat\fR call. If not implemented, Tcl
+will attempt to use the \fIstatProc\fR defined above instead. Therefore
it need only be implemented if a filesystem can differentiate between
\fBstat\fR and \fBlstat\fR calls.
.PP
.CS
-typedef int Tcl_FSLstatProc(
- Tcl_Obj *\fIpathPtr\fR,
- Tcl_StatBuf *\fIstatPtr\fR);
+typedef int \fBTcl_FSLstatProc\fR(
+ Tcl_Obj *\fIpathPtr\fR,
+ Tcl_StatBuf *\fIstatPtr\fR);
.CE
.PP
-The behavior of this function is very similar to that of the
-Tcl_FSStatProc defined above, except that if it is applied
+The behavior of this function is very similar to that of the
+\fBTcl_FSStatProc\fR defined above, except that if it is applied
to a symbolic link, it returns information about the link, not
about the target file.
+.SS COPYFILEPROC
.PP
-.SH COPYFILEPROC
-.PP
-Function to process a \fBTcl_FSCopyFile()\fR call. If not implemented Tcl
-will fall back on open-r, open-w and fcopy as a copying mechanism.
+Function to process a \fBTcl_FSCopyFile\fR call. If not implemented Tcl
+will fall back on \fBopen\fR-r, \fBopen\fR-w and \fBfcopy\fR as a
+copying mechanism.
Therefore it need only be implemented if the filesystem can perform
that action more efficiently.
.PP
.CS
-typedef int Tcl_FSCopyFileProc(
- Tcl_Obj *\fIsrcPathPtr\fR,
- Tcl_Obj *\fIdestPathPtr\fR);
+typedef int \fBTcl_FSCopyFileProc\fR(
+ Tcl_Obj *\fIsrcPathPtr\fR,
+ Tcl_Obj *\fIdestPathPtr\fR);
.CE
.PP
The return value is a standard Tcl result indicating whether an error
-occurred in the copying process. Note that, \fIdestPathPtr\fR is the
+occurred in the copying process. Note that, \fIdestPathPtr\fR is the
name of the file which should become the copy of \fIsrcPathPtr\fR. It
is never the name of a directory into which \fIsrcPathPtr\fR could be
-copied (i.e. the function is much simpler than the Tcl level 'file
-copy' subcommand). Note that,
+copied (i.e.\ the function is much simpler than the Tcl level \fBfile
+copy\fR subcommand). Note that,
if the filesystem supports symbolic links, Tcl will always call this
-function and not Tcl_FSCopyDirectoryProc when needed to copy them
-(even if they are symbolic links to directories).
-.SH RENAMEFILEPROC
-.PP
-Function to process a \fBTcl_FSRenameFile()\fR call. If not implemented,
-Tcl will fall back on a copy and delete mechanism. Therefore it need
+function and not \fIcopyDirectoryProc\fR when needed to copy them
+(even if they are symbolic links to directories). Finally, if the
+filesystem determines it cannot support the \fBfile copy\fR action,
+calling \fBTcl_SetErrno(EXDEV)\fR and returning a non-\fBTCL_OK\fR
+result will tell Tcl to use its standard fallback mechanisms.
+.SS RENAMEFILEPROC
+.PP
+Function to process a \fBTcl_FSRenameFile\fR call. If not implemented,
+Tcl will fall back on a copy and delete mechanism. Therefore it need
only be implemented if the filesystem can perform that action more
efficiently.
.PP
.CS
-typedef int Tcl_FSRenameFileProc(
- Tcl_Obj *\fIsrcPathPtr\fR,
- Tcl_Obj *\fIdestPathPtr\fR);
+typedef int \fBTcl_FSRenameFileProc\fR(
+ Tcl_Obj *\fIsrcPathPtr\fR,
+ Tcl_Obj *\fIdestPathPtr\fR);
.CE
.PP
The return value is a standard Tcl result indicating whether an error
-occurred in the renaming process.
-.SH COPYDIRECTORYPROC
-.PP
-Function to process a \fBTcl_FSCopyDirectory()\fR call. If not
-implemented, Tcl will fall back on a recursive create-dir, file copy
-mechanism. Therefore it need only be implemented if the filesystem can
+occurred in the renaming process. If the
+filesystem determines it cannot support the \fBfile rename\fR action,
+calling \fBTcl_SetErrno(EXDEV)\fR and returning a non-\fBTCL_OK\fR
+result will tell Tcl to use its standard fallback mechanisms.
+.SS COPYDIRECTORYPROC
+.PP
+Function to process a \fBTcl_FSCopyDirectory\fR call. If not
+implemented, Tcl will fall back on a recursive \fBfile mkdir\fR, \fBfile copy\fR
+mechanism. Therefore it need only be implemented if the filesystem can
perform that action more efficiently.
.PP
.CS
-typedef int Tcl_FSCopyDirectoryProc(
- Tcl_Obj *\fIsrcPathPtr\fR,
- Tcl_Obj *\fIdestPathPtr\fR,
- Tcl_Obj **\fIerrorPtr\fR);
+typedef int \fBTcl_FSCopyDirectoryProc\fR(
+ Tcl_Obj *\fIsrcPathPtr\fR,
+ Tcl_Obj *\fIdestPathPtr\fR,
+ Tcl_Obj **\fIerrorPtr\fR);
.CE
.PP
The return value is a standard Tcl result indicating whether an error
-occurred in the copying process. If an error does occur, the name of
+occurred in the copying process. If an error does occur, the name of
the file or directory which caused the error should be placed in
\fIerrorPtr\fR. Note that, \fIdestPathPtr\fR is the name of the
directory-name which should become the mirror-image of
\fIsrcPathPtr\fR. It is not the name of a directory into which
-\fIsrcPathPtr\fR should be copied (i.e. the function is much simpler
-than the Tcl level 'file copy' subcommand).
-.SH LOADFILEPROC
-.PP
-Function to process a \fBTcl_FSLoadFile()\fR call. If not implemented, Tcl
-will fall back on a copy to native-temp followed by a Tcl_FSLoadFile on
-that temporary copy. Therefore it need only be implemented if the
+\fIsrcPathPtr\fR should be copied (i.e.\ the function is much simpler
+than the Tcl level \fBfile copy\fR subcommand). Finally, if the
+filesystem determines it cannot support the directory copy action,
+calling \fBTcl_SetErrno(EXDEV)\fR and returning a non-\fBTCL_OK\fR
+result will tell Tcl to use its standard fallback mechanisms.
+.SS LOADFILEPROC
+.PP
+Function to process a \fBTcl_FSLoadFile\fR call. If not implemented, Tcl
+will fall back on a copy to native-temp followed by a \fBTcl_FSLoadFile\fR on
+that temporary copy. Therefore it need only be implemented if the
filesystem can load code directly, or it can be implemented simply to
-return TCL_ERROR to disable load functionality in this filesystem
+return \fBTCL_ERROR\fR to disable load functionality in this filesystem
entirely.
.PP
.CS
-typedef int Tcl_FSLoadFileProc(
- Tcl_Interp * \fIinterp\fR,
- Tcl_Obj *\fIpathPtr\fR,
- Tcl_LoadHandle * \fIhandlePtr\fR,
- Tcl_FSUnloadFileProc * \fIunloadProcPtr\fR);
+typedef int \fBTcl_FSLoadFileProc\fR(
+ Tcl_Interp *\fIinterp\fR,
+ Tcl_Obj *\fIpathPtr\fR,
+ Tcl_LoadHandle *\fIhandlePtr\fR,
+ Tcl_FSUnloadFileProc *\fIunloadProcPtr\fR);
.CE
.PP
-Returns a standard Tcl completion code. If an error occurs, an error
-message is left in the interp's result. The function dynamically loads
-a binary code file into memory. On a successful
-load, the \fIhandlePtr\fR should be filled with a token for
-the dynamically loaded file, and the \fIunloadProcPtr\fR should be
-filled in with the address of a procedure. The procedure will be
-called with the given Tcl_LoadHandle as its only parameter when Tcl
-needs to unload the file.
-.SH UNLOADFILEPROC
-.PP
-Function to unload a previously successfully loaded file. If load was
+Returns a standard Tcl completion code. If an error occurs, an error
+message is left in the \fIinterp\fR's result. The function dynamically loads a
+binary code file into memory. On a successful load, the \fIhandlePtr\fR
+should be filled with a token for the dynamically loaded file, and the
+\fIunloadProcPtr\fR should be filled in with the address of a procedure.
+The unload procedure will be called with the given \fBTcl_LoadHandle\fR as its
+only parameter when Tcl needs to unload the file. For example, for the
+native filesystem, the \fBTcl_LoadHandle\fR returned is currently a token
+which can be used in the private \fBTclpFindSymbol\fR to access functions
+in the new code. Each filesystem is free to define the
+\fBTcl_LoadHandle\fR as it requires. Finally, if the
+filesystem determines it cannot support the file load action,
+calling \fBTcl_SetErrno(EXDEV)\fR and returning a non-\fBTCL_OK\fR
+result will tell Tcl to use its standard fallback mechanisms.
+.SS UNLOADFILEPROC
+.PP
+Function to unload a previously successfully loaded file. If load was
implemented, then this should also be implemented, if there is any
cleanup action required.
.PP
.CS
-typedef void Tcl_FSUnloadFileProc(
- Tcl_LoadHandle \fIloadHandle\fR);
+typedef void \fBTcl_FSUnloadFileProc\fR(
+ Tcl_LoadHandle \fIloadHandle\fR);
.CE
-.SH GETCWDPROC
+.SS GETCWDPROC
.PP
-Function to process a \fBTcl_FSGetCwd()\fR call. Most filesystems need not
-implement this. It will usually only be called once, if 'getcwd' is
-called before 'chdir'. May be NULL.
+Function to process a \fBTcl_FSGetCwd\fR call. Most filesystems need not
+implement this. It will usually only be called once, if \fBgetcwd\fR is
+called before \fBchdir\fR. May be NULL.
.PP
.CS
-typedef Tcl_Obj* Tcl_FSGetCwdProc(
- Tcl_Interp *\fIinterp\fR);
+typedef Tcl_Obj *\fBTcl_FSGetCwdProc\fR(
+ Tcl_Interp *\fIinterp\fR);
.CE
.PP
If the filesystem supports a native notion of a current working
directory (which might perhaps change independent of Tcl), this
function should return that cwd as the result, or NULL if the current
-directory could not be determined (e.g. the user does not have
-appropriate permissions on the cwd directory). If NULL is returned, an
-error message is left in the interp's result.
-.PP
-.SH CHDIRPROC
+directory could not be determined (e.g.\ the user does not have
+appropriate permissions on the cwd directory). If NULL is returned, an
+error message is left in the \fIinterp\fR's result.
+.SS CHDIRPROC
.PP
-Function to process a \fBTcl_FSChdir()\fR call. If filesystems do not
+Function to process a \fBTcl_FSChdir\fR call. If filesystems do not
implement this, it will be emulated by a series of directory access
-checks. Otherwise, virtual filesystems which do implement it need only
-respond with a positive return result if the dirName is a valid,
-accessible directory in their filesystem. They need not remember the
-result, since that will be automatically remembered for use by GetCwd.
-Real filesystems should carry out the correct action (i.e. call the
-correct system 'chdir' api).
+checks. Otherwise, virtual filesystems which do implement it need only
+respond with a positive return result if the \fIpathPtr\fR is a valid,
+accessible directory in their filesystem. They need not remember the
+result, since that will be automatically remembered for use by
+\fBTcl_FSGetCwd\fR.
+Real filesystems should carry out the correct action (i.e.\ call the
+correct system \fBchdir\fR API).
.PP
.CS
-typedef int Tcl_FSChdirProc(
- Tcl_Obj *\fIpathPtr\fR);
+typedef int \fBTcl_FSChdirProc\fR(
+ Tcl_Obj *\fIpathPtr\fR);
.CE
.PP
The \fBTcl_FSChdirProc\fR changes the applications current working
directory to the value specified in \fIpathPtr\fR. The function returns
-1 on error or 0 on success.
+.SH "SEE ALSO"
+cd(n), file(n), filename(n), load(n), open(n), pwd(n), source(n), unload(n)
.SH KEYWORDS
-stat access filesystem vfs
+stat, access, filesystem, vfs, virtual filesystem
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