MKFIFOAT

Section: Linux Programmer's Manual (3)
Updated: 2006-04-06
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NAME

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

SYNOPSIS

#include <sys/stat.h>

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

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 the pathname given in 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 the pathname given in 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.
 

NOTES

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

CONFORMING TO

This function is non-standard but is proposed for inclusion in a future revision of POSIX.1.  

VERSIONS

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

SEE ALSO

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


 

Index

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
ERRORS
NOTES
CONFORMING TO
VERSIONS
SEE ALSO

linux.jgfs.net manual pages