mkfifoat(3)

1MKFIFOAT(3)                Linux Programmer's Manual               MKFIFOAT(3)
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NAME

6       mkfifoat  -  make  a  FIFO  (named  pipe)  relative to a directory file
7       descriptor
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SYNOPSIS

10       #include <fcntl.h> /* Definition of AT_* constants */
11       #include <sys/stat.h>
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13       int mkfifoat(int dirfd, const char *pathname, mode_t mode);
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15   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
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17       mkfifoat():
18       Since glibc 2.10: _XOPEN_SOURCE >= 700 || _POSIX_C_SOURCE >= 200809L
19       Before glibc 2.10: _ATFILE_SOURCE
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DESCRIPTION

22       The mkfifoat()  system  call  operates  in  exactly  the  same  way  as
23       mkfifo(3), except for the differences described in this manual page.
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25       If  the  pathname given in pathname is relative, then it is interpreted
26       relative to the directory referred to  by  the  file  descriptor  dirfd
27       (rather  than  relative to the current working directory of the calling
28       process, as is done by mkfifo(3) for a relative pathname).
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30       If pathname is relative and dirfd is the special value  AT_FDCWD,  then
31       pathname  is  interpreted  relative to the current working directory of
32       the calling process (like mkfifo(3)).
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34       If pathname is absolute, then dirfd is ignored.
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RETURN VALUE

37       On success, mkfifoat() returns 0.  On error, -1 is returned  and  errno
38       is set to indicate the error.
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ERRORS

41       The same errors that occur for mkfifo(3) can also occur for mkfifoat().
42       The following additional errors can occur for mkfifoat():
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44       EBADF  dirfd is not a valid file descriptor.
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46       ENOTDIR
47              pathname is a relative path  and  dirfd  is  a  file  descriptor
48              referring to a file other than a directory.
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VERSIONS

51       mkfifoat()  was added to glibc in version 2.4.  It is implemented using
52       mknod(2), available on Linux since kernel 2.6.16.
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CONFORMING TO

55       POSIX.1-2008.
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NOTES

58       See openat(2) for an explanation of the need for mkfifoat().
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COLOPHON

64       This page is part of release 3.25 of the Linux  man-pages  project.   A
65       description  of  the project, and information about reporting bugs, can
66       be found at http://www.kernel.org/doc/man-pages/.
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70Linux                             2009-12-13                       MKFIFOAT(3)