+++ /dev/null
-.\" This manpage is Copyright (C) 1995 James R. Van Zandt <jrv@vanzandt.mv.com>
-.\" and Copyright (C) 2006, 2014 Michael Kerrisk
-.\"
-.\" %%%LICENSE_START(VERBATIM)
-.\" Permission is granted to make and distribute verbatim copies of this
-.\" manual provided the copyright notice and this permission notice are
-.\" preserved on all copies.
-.\"
-.\" Permission is granted to copy and distribute modified versions of this
-.\" manual under the conditions for verbatim copying, provided that the
-.\" entire resulting derived work is distributed under the terms of a
-.\" permission notice identical to this one.
-.\"
-.\" Since the Linux kernel and libraries are constantly changing, this
-.\" manual page may be incorrect or out-of-date. The author(s) assume no
-.\" responsibility for errors or omissions, or for damages resulting from
-.\" the use of the information contained herein. The author(s) may not
-.\" have taken the same level of care in the production of this manual,
-.\" which is licensed free of charge, as they might when working
-.\" professionally.
-.\"
-.\" Formatted or processed versions of this manual, if unaccompanied by
-.\" the source, must acknowledge the copyright and authors of this work.
-.\" %%%LICENSE_END
-.\"
-.\" changed section from 2 to 3, aeb, 950919
-.\"
-.TH MKFIFO 3 2014-03-24 "GNU" "Linux Programmer's Manual"
-.SH NAME
-mkfifo, mkfifoat \- make a FIFO special file (a named pipe)
-.SH SYNOPSIS
-.nf
-.B #include <sys/types.h>
-.B #include <sys/stat.h>
-.sp
-.BI "int mkfifo(const char *" pathname ", mode_t " mode );
-.sp
-.BR "#include <fcntl.h> " "/* Definition of AT_* constants */"
-.B #include <sys/stat.h>
-.sp
-.BI "int mkfifoat(int " dirfd ", const char *" pathname ", mode_t " mode );
-.fi
-.sp
-.in -4n
-Feature Test Macro Requirements for glibc (see
-.BR feature_test_macros (7)):
-.in
-.sp
-.BR mkfifoat ():
-.PD 0
-.ad l
-.RS 4
-.TP 4
-Since glibc 2.10:
-_XOPEN_SOURCE\ >=\ 700 || _POSIX_C_SOURCE\ >=\ 200809L
-.TP
-Before glibc 2.10:
-_ATFILE_SOURCE
-.RE
-.ad
-.PD
-.SH DESCRIPTION
-.BR mkfifo ()
-makes a FIFO special file with name \fIpathname\fP.
-\fImode\fP specifies the FIFO's permissions.
-It is modified by the
-process's \fBumask\fP in the usual way: the permissions of the created
-file are \fB(\fP\fImode\fP\fB & ~umask)\fP.
-.PP
-A FIFO special file is similar to a pipe, except that it is created
-in a different way.
-Instead of being an anonymous communications
-channel, a FIFO special file is entered into the filesystem by
-calling
-.BR mkfifo ().
-.PP
-Once you have created a FIFO special file in this way, any process can
-open it for reading or writing, in the same way as an ordinary file.
-However, it has to be open at both ends simultaneously before you can
-proceed to do any input or output operations on it.
-Opening a FIFO for reading normally blocks until some
-other process opens the same FIFO for writing, and vice versa.
-See
-.BR fifo (7)
-for nonblocking handling of FIFO special files.
-.SS mkfifoat()
-The
-.BR mkfifoat ()
-function operates in exactly the same way as
-.BR mkfifo (),
-except for the differences described here.
-
-If the pathname given in
-.I pathname
-is relative, then it is interpreted relative to the directory
-referred to by the file descriptor
-.I dirfd
-(rather than relative to the current working directory of
-the calling process, as is done by
-.BR mkfifo ()
-for a relative pathname).
-
-If
-.I pathname
-is relative and
-.I dirfd
-is the special value
-.BR AT_FDCWD ,
-then
-.I pathname
-is interpreted relative to the current working
-directory of the calling process (like
-.BR mkfifo ()).
-
-If
-.I pathname
-is absolute, then
-.I dirfd
-is ignored.
-.SH RETURN VALUE
-On success
-.BR mkfifo ()
-and
-.BR mkfifoat ()
-return 0.
-In the case of an error, \-1 is returned (in which case, \fIerrno\fP
-is set appropriately).
-.SH ERRORS
-.TP
-.B EACCES
-One of the directories in \fIpathname\fP did not allow search
-(execute) permission.
-.TP
-.B EDQUOT
-The user's quota of disk blocks or inodes on the filesystem has been
-exhausted.
-.TP
-.B EEXIST
-\fIpathname\fP already exists.
-This includes the case where
-.I pathname
-is a symbolic link, dangling or not.
-.TP
-.B ENAMETOOLONG
-Either the total length of \fIpathname\fP is greater than
-\fBPATH_MAX\fP, or an individual filename component has a length
-greater than \fBNAME_MAX\fP.
-In the GNU system, there is no imposed
-limit on overall filename length, but some filesystems may place
-limits on the length of a component.
-.TP
-.B ENOENT
-A directory component in \fIpathname\fP does not exist or is a
-dangling symbolic link.
-.TP
-.B ENOSPC
-The directory or filesystem has no room for the new file.
-.TP
-.B ENOTDIR
-A component used as a directory in \fIpathname\fP is not, in fact, a
-directory.
-.TP
-.B EROFS
-\fIpathname\fP refers to a read-only filesystem.
-.PP
-The following additional errors can occur for
-.BR mkfifoat ():
-.TP
-.B EBADF
-.I dirfd
-is not a valid file descriptor.
-.TP
-.B ENOTDIR
-.I pathname
-is a relative path and
-.I dirfd
-is a file descriptor referring to a file other than a directory.
-.SH VERSIONS
-.BR mkfifoat ()
-was added to glibc in version 2.4.
-It is implemented using
-.BR mknodat (2),
-available on Linux since kernel 2.6.16.
-.SH ATTRIBUTES
-.SS Multithreading (see pthreads(7))
-The
-.BR mkfifo ()
-and
-.BR mkfifoat ()
-functions are thread-safe.
-.SH CONFORMING TO
-.BR mkfifo ():
-POSIX.1-2001, POSIX.1-2008.
-
-.BR mkfifoat ():
-POSIX.1-2008.
-.SH SEE ALSO
-.BR mkfifo (1),
-.BR close (2),
-.BR open (2),
-.BR read (2),
-.BR stat (2),
-.BR umask (2),
-.BR write (2),
-.BR fifo (7)
-.SH COLOPHON
-This page is part of release 3.79 of the Linux
-.I man-pages
-project.
-A description of the project,
-information about reporting bugs,
-and the latest version of this page,
-can be found at
-\%http://www.kernel.org/doc/man\-pages/.
OSDN Git Service
