1 /* path.h: path data structures
3 Copyright 1996, 1997, 1998, 2000, 2001, 2002, 2003, 2004, 2005,
4 2006, 2007, 2008, 2009, 2010, 2011 Red Hat, Inc.
6 This file is part of Cygwin.
8 This software is a copyrighted work licensed under the terms of the
9 Cygwin license. Please consult the file "CYGWIN_LICENSE" for
14 #include "cygheap_malloc.h"
17 #include <sys/ioctl.h>
22 has_attribute (DWORD attributes, DWORD attribs_to_test)
24 return attributes != INVALID_FILE_ATTRIBUTES
25 && (attributes & attribs_to_test);
28 enum executable_states
31 dont_care_if_executable,
32 not_executable = dont_care_if_executable,
33 dont_know_if_executable
40 suffix_info (const char *s, int addit = 0): name (s), addon (addit) {}
43 extern suffix_info stat_suffixes[];
47 PC_SYM_FOLLOW = 0x0001,
48 PC_SYM_NOFOLLOW = 0x0002,
49 PC_SYM_NOFOLLOW_REP = 0x0004,
50 PC_SYM_CONTENTS = 0x0008,
52 PC_NULLEMPTY = 0x0020,
55 PC_OPEN = 0x0200, /* use open semantics */
56 PC_CTTY = 0x0400, /* could later be used as ctty */
57 PC_KEEP_HANDLE = 0x00400000,
58 PC_NO_ACCESS_CHECK = 0x00800000
61 #define PC_NONULLEMPTY -1
63 #include "sys/mount.h"
68 PATH_SYMLINK = MOUNT_SYMLINK,
69 PATH_BINARY = MOUNT_BINARY,
70 PATH_EXEC = MOUNT_EXEC,
71 PATH_NOTEXEC = MOUNT_NOTEXEC,
72 PATH_CYGWIN_EXEC = MOUNT_CYGWIN_EXEC,
74 PATH_NOACL = MOUNT_NOACL,
75 PATH_NOPOSIX = MOUNT_NOPOSIX,
77 PATH_IHASH = MOUNT_IHASH,
78 PATH_ALL_EXEC = (PATH_CYGWIN_EXEC | PATH_EXEC),
79 PATH_NO_ACCESS_CHECK = PC_NO_ACCESS_CHECK,
80 PATH_CTTY = 0x00400000, /* could later be used as ctty */
81 PATH_OPEN = 0x00800000, /* use open semantics */
82 PATH_LNK = 0x01000000,
83 PATH_TEXT = 0x02000000,
84 PATH_REP = 0x04000000,
85 PATH_HAS_SYMLINKS = 0x10000000,
86 PATH_SOCKET = 0x40000000
90 struct _FILE_NETWORK_OPEN_INFORMATION;
92 class path_conv_handle
96 /* Identical to FILE_NETWORK_OPEN_INFORMATION. We don't want to pull in
97 ntdll.h here, though. */
99 LARGE_INTEGER CreationTime;
100 LARGE_INTEGER LastAccessTime;
101 LARGE_INTEGER LastWriteTime;
102 LARGE_INTEGER ChangeTime;
103 LARGE_INTEGER AllocationSize;
104 LARGE_INTEGER EndOfFile;
105 ULONG FileAttributes;
111 path_conv_handle () : hdl (NULL) {}
112 inline void set (HANDLE h) { hdl = h; }
119 inline void dup (const path_conv_handle &pch)
121 if (!DuplicateHandle (GetCurrentProcess (), pch.handle (),
122 GetCurrentProcess (), &hdl,
123 0, TRUE, DUPLICATE_SAME_ACCESS))
126 inline HANDLE handle () const { return hdl; }
127 inline struct _FILE_NETWORK_OPEN_INFORMATION *fnoi ()
128 { return (struct _FILE_NETWORK_OPEN_INFORMATION *) &attribs._fnoi; }
129 inline struct fattr3 *nfsattr ()
130 { return (struct fattr3 *) &attribs._fattr3; }
136 ULONG caseinsensitive;
139 UNICODE_STRING uni_path;
140 void add_ext_from_sym (symlink_info&);
141 DWORD symlink_length;
143 path_conv_handle conv_handle;
146 const char *known_suffix;
147 const char *normalized_path;
151 bool isremote () const {return fs.is_remote_drive ();}
152 ULONG objcaseinsensitive () const {return caseinsensitive;}
153 bool has_acls () const {return !(path_flags & PATH_NOACL) && fs.has_acls (); }
154 bool hasgood_inode () const {return !(path_flags & PATH_IHASH); }
155 bool isgood_inode (__ino64_t ino) const;
156 int has_symlinks () const {return path_flags & PATH_HAS_SYMLINKS;}
157 int has_dos_filenames_only () const {return path_flags & PATH_DOS;}
158 int has_buggy_open () const {return fs.has_buggy_open ();}
159 int has_buggy_reopen () const {return fs.has_buggy_reopen ();}
160 int has_buggy_fileid_dirinfo () const {return fs.has_buggy_fileid_dirinfo ();}
161 int has_buggy_basic_info () const {return fs.has_buggy_basic_info ();}
164 if (path_flags & PATH_BINARY)
166 if (path_flags & PATH_TEXT)
170 int issymlink () const {return path_flags & PATH_SYMLINK;}
171 int is_lnk_symlink () const {return path_flags & PATH_LNK;}
172 int is_rep_symlink () const {return path_flags & PATH_REP;}
173 int isdevice () const {return dev.not_device (FH_FS) && dev.not_device (FH_FIFO);}
174 int isfifo () const {return dev.is_device (FH_FIFO);}
175 int isspecial () const {return dev.not_device (FH_FS);}
176 int iscygdrive () const {return dev.is_device (FH_CYGDRIVE);}
177 int is_auto_device () const {return isdevice () && !is_fs_special ();}
178 int is_fs_device () const {return isdevice () && is_fs_special ();}
179 int is_fs_special () const {return dev.is_fs_special ();}
180 int is_lnk_special () const {return is_fs_device () || isfifo () || is_lnk_symlink ();}
181 int issocket () const {return dev.is_device (FH_UNIX);}
182 int iscygexec () const {return path_flags & PATH_CYGWIN_EXEC;}
183 int isopen () const {return path_flags & PATH_OPEN;}
184 int isctty_capable () const {return path_flags & PATH_CTTY;}
185 void set_cygexec (bool isset)
188 path_flags |= PATH_CYGWIN_EXEC;
190 path_flags &= ~PATH_CYGWIN_EXEC;
192 bool isro () const {return !!(path_flags & PATH_RO);}
193 bool exists () const {return fileattr != INVALID_FILE_ATTRIBUTES;}
194 bool has_attribute (DWORD x) const {return exists () && (fileattr & x);}
195 int isdir () const {return has_attribute (FILE_ATTRIBUTE_DIRECTORY);}
196 executable_states exec_state ()
198 extern int _check_for_executable;
199 if (path_flags & PATH_ALL_EXEC)
200 return is_executable;
201 if (path_flags & PATH_NOTEXEC)
202 return not_executable;
203 if (!_check_for_executable)
204 return dont_care_if_executable;
205 return dont_know_if_executable;
208 void set_symlink (DWORD n) {path_flags |= PATH_SYMLINK; symlink_length = n;}
209 void set_has_symlinks () {path_flags |= PATH_HAS_SYMLINKS;}
210 void set_exec (int x = 1) {path_flags |= x ? PATH_EXEC : PATH_NOTEXEC;}
212 void check (const UNICODE_STRING *upath, unsigned opt = PC_SYM_FOLLOW,
213 const suffix_info *suffixes = NULL) __attribute__ ((regparm(3)));
214 void check (const char *src, unsigned opt = PC_SYM_FOLLOW,
215 const suffix_info *suffixes = NULL) __attribute__ ((regparm(3)));
217 path_conv (const device& in_dev)
218 : fileattr (INVALID_FILE_ATTRIBUTES), wide_path (NULL), path (NULL),
219 path_flags (0), known_suffix (NULL), normalized_path (NULL), error (0),
222 set_path (in_dev.native);
225 path_conv (int, const char *src, unsigned opt = PC_SYM_FOLLOW,
226 const suffix_info *suffixes = NULL)
227 : fileattr (INVALID_FILE_ATTRIBUTES), wide_path (NULL), path (NULL),
228 path_flags (0), known_suffix (NULL), normalized_path (NULL), error (0)
230 check (src, opt, suffixes);
233 path_conv (const UNICODE_STRING *src, unsigned opt = PC_SYM_FOLLOW,
234 const suffix_info *suffixes = NULL)
235 : fileattr (INVALID_FILE_ATTRIBUTES), wide_path (NULL), path (NULL),
236 path_flags (0), known_suffix (NULL), normalized_path (NULL), error (0)
238 check (src, opt | PC_NULLEMPTY, suffixes);
241 path_conv (const char *src, unsigned opt = PC_SYM_FOLLOW,
242 const suffix_info *suffixes = NULL)
243 : fileattr (INVALID_FILE_ATTRIBUTES), wide_path (NULL), path (NULL),
244 path_flags (0), known_suffix (NULL), normalized_path (NULL), error (0)
246 check (src, opt | PC_NULLEMPTY, suffixes);
250 : fileattr (INVALID_FILE_ATTRIBUTES), wide_path (NULL), path (NULL),
251 path_flags (0), known_suffix (NULL), normalized_path (NULL), error (0)
255 inline const char *get_win32 () { return path; }
256 PUNICODE_STRING get_nt_native_path ();
257 inline POBJECT_ATTRIBUTES get_object_attr (OBJECT_ATTRIBUTES &attr,
258 SECURITY_ATTRIBUTES &sa)
260 if (!get_nt_native_path ())
262 InitializeObjectAttributes (&attr, &uni_path,
263 objcaseinsensitive ()
264 | (sa.bInheritHandle ? OBJ_INHERIT : 0),
265 NULL, sa.lpSecurityDescriptor);
268 inline void init_reopen_attr (POBJECT_ATTRIBUTES attr, HANDLE h)
270 if (has_buggy_reopen ())
271 InitializeObjectAttributes (attr, get_nt_native_path (),
272 objcaseinsensitive (), NULL, NULL)
274 InitializeObjectAttributes (attr, &ro_u_empty, objcaseinsensitive (),
277 inline size_t get_wide_win32_path_len ()
279 get_nt_native_path ();
280 return uni_path.Length / sizeof (WCHAR);
283 PWCHAR get_wide_win32_path (PWCHAR wc);
284 operator DWORD &() {return fileattr;}
285 operator int () {return fileattr; }
286 # define cfree_and_null(x) \
289 cfree ((void *) (x)); \
294 cfree_and_null (path);
295 cfree_and_null (normalized_path);
296 cfree_and_null (wide_path);
298 path_conv& eq_worker (const path_conv& pc, const char *in_path,
299 const char *in_normalized_path)
302 memcpy (this, &pc, sizeof pc);
303 path = cstrdup (in_path);
304 conv_handle.dup (pc.conv_handle);
305 normalized_path = cstrdup(pc.normalized_path);
308 wide_path = cwcsdup (uni_path.Buffer);
310 api_fatal ("cwcsdup would have returned NULL");
311 uni_path.Buffer = wide_path;
316 path_conv &operator << (const path_conv& pc)
318 const char *save_path;
319 const char *save_normalized_path;
324 save_path = (char *) alloca (strlen (path) + 1);
325 strcpy ((char *) save_path, path);
327 if (!normalized_path)
328 save_normalized_path = pc.normalized_path;
331 save_normalized_path = (char *) alloca (strlen (normalized_path) + 1);
332 strcpy ((char *) save_normalized_path, path);
334 return eq_worker (pc, save_path, save_normalized_path);
337 path_conv &operator =(const path_conv& pc)
339 return eq_worker (pc, pc.path, pc.normalized_path);
341 DWORD get_devn () {return (DWORD) dev;}
342 short get_unitn () const {return dev.get_minor ();}
343 DWORD file_attributes () const {return fileattr;}
344 void file_attributes (DWORD new_attr) {fileattr = new_attr;}
345 DWORD fs_flags () {return fs.flags ();}
346 DWORD fs_name_len () {return fs.name_len ();}
347 bool fs_is_fat () const {return fs.is_fat ();}
348 bool fs_is_ntfs () const {return fs.is_ntfs ();}
349 bool fs_is_samba () const {return fs.is_samba ();}
350 bool fs_is_nfs () const {return fs.is_nfs ();}
351 bool fs_is_netapp () const {return fs.is_netapp ();}
352 bool fs_is_cdrom () const {return fs.is_cdrom ();}
353 bool fs_is_mvfs () const {return fs.is_mvfs ();}
354 bool fs_is_cifs () const {return fs.is_cifs ();}
355 bool fs_is_nwfs () const {return fs.is_nwfs ();}
356 bool fs_is_ncfsd () const {return fs.is_ncfsd ();}
357 ULONG fs_serial_number () const {return fs.serial_number ();}
358 inline const char *set_path (const char *p)
361 cfree (modifiable_path ());
362 char *new_path = (char *) cmalloc_abort (HEAP_STR, strlen (p) + 7);
363 strcpy (new_path, p);
364 return path = new_path;
368 HANDLE handle () const { return conv_handle.handle (); }
369 struct _FILE_NETWORK_OPEN_INFORMATION *fnoi () { return conv_handle.fnoi (); }
370 struct fattr3 *nfsattr () { return conv_handle.nfsattr (); }
371 void reset_conv_handle () { conv_handle.set (NULL); }
372 void close_conv_handle () { conv_handle.close (); }
374 __ino64_t get_ino_by_handle (HANDLE h);
375 #if 0 /* obsolete, method still exists in fhandler_disk_file.cc */
376 unsigned __stdcall ndisk_links (DWORD);
378 void set_normalized_path (const char *) __attribute__ ((regparm (2)));
379 DWORD get_symlink_length () { return symlink_length; };
381 char *modifiable_path () {return (char *) path;}
385 #define SYMLINK_COOKIE "!<symlink>"
388 #define SOCKET_COOKIE "!<socket >"
390 /* Interix symlink marker */
391 #define INTERIX_SYMLINK_COOKIE "IntxLNK\1"
395 FE_NADA = 0, /* Nothing special */
396 FE_NNF = 1, /* Return NULL if not found */
397 FE_NATIVE = 2, /* Return native path in path_conv struct */
398 FE_CWD = 4, /* Search CWD for program */
399 FE_DLL = 8 /* Search for DLLs, not executables. */
401 const char *__stdcall find_exec (const char *name, path_conv& buf,
402 const char *winenv = "PATH=",
403 unsigned opt = FE_NADA,
404 const char **known_suffix = NULL)
405 __attribute__ ((regparm(3)));
407 /* Common macros for checking for invalid path names */
408 #define isdrive(s) (isalpha (*(s)) && (s)[1] == ':')
409 #define iswdrive(s) (iswalpha (*(s)) && (s)[1] == L':')
412 has_exec_chars (const char *buf, int len)
415 ((buf[0] == '#' && buf[1] == '!') ||
416 (buf[0] == ':' && buf[1] == '\n') ||
417 (buf[0] == 'M' && buf[1] == 'Z'));
420 int pathmatch (const char *path1, const char *path2, bool caseinsensitive) __attribute__ ((regparm (3)));
421 int pathnmatch (const char *path1, const char *path2, int len, bool caseinsensitive) __attribute__ ((regparm (3)));
422 bool has_dot_last_component (const char *dir, bool test_dot_dot) __attribute__ ((regparm (2)));
424 int path_prefix_p (const char *path1, const char *path2, int len1,
425 bool caseinsensitive) __attribute__ ((regparm (3)));
427 bool is_floppy (const char *);
428 int normalize_win32_path (const char *, char *, char *&);
429 int normalize_posix_path (const char *, char *, char *&);
430 PUNICODE_STRING get_nt_native_path (const char *, UNICODE_STRING&, bool) __attribute__ ((regparm (3)));
432 /* FIXME: Move to own include file eventually */
434 #define MAX_ETC_FILES 2
439 static HANDLE changed_h;
440 static bool change_possible[MAX_ETC_FILES + 1];
441 static OBJECT_ATTRIBUTES fn[MAX_ETC_FILES + 1];
442 static LARGE_INTEGER last_modified[MAX_ETC_FILES + 1];
443 static bool dir_changed (int);
444 static int init (int, POBJECT_ATTRIBUTES);
445 static bool file_changed (int);
446 static bool test_file_change (int);