NAME

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

SYNOPSIS

       #include <fcntl.h> /* Definition of AT_* constants */
       #include <sys/stat.h>

       int mkfifoat(int dirfd, const char *pathname, mode_t mode);

   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

       mkfifoat():
           Since glibc 2.10:
               _XOPEN_SOURCE >= 700 || _POSIX_C_SOURCE >= 200809L
           Before glibc 2.10:
               _ATFILE_SOURCE

DESCRIPTION

       The  mkfifoat()  system  call  operates  in exactly the same way as mkfifo(3), except for the differences
       described in this manual page.

       If the pathname given in pathname is relative, then it is interpreted relative to the directory  referred
       to  by  the  file  descriptor dirfd (rather than relative to the current working directory of the calling
       process, as is done by mkfifo(3) for a relative pathname).

       If pathname is relative and dirfd is the special value AT_FDCWD, then pathname is interpreted relative to
       the current working directory of the calling process (like mkfifo(3)).

       If pathname is absolute, then dirfd is ignored.

RETURN VALUE

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

ERRORS

       The same errors that occur for mkfifo(3) can also occur for mkfifoat().  The following additional  errors
       can occur for mkfifoat():

       EBADF  dirfd is not a valid file descriptor.

       ENOTDIR
              pathname  is  a  relative  path  and  dirfd  is a file descriptor referring to a file other than a
              directory.

VERSIONS

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

CONFORMING TO

       POSIX.1-2008.

NOTES

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

SEE ALSO

       openat(2), mkfifo(3), path_resolution(7)

COLOPHON

       This page is part of release 3.54 of the Linux man-pages project.  A  description  of  the  project,  and
       information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.

Linux                                              2009-12-13                                        MKFIFOAT(3)