mkfifoat

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

#define _ATFILE_SOURCE
#include <sys/stat.h>
 I int mkfifoat(int  dirfd , const char * pathname , mode_t  mode );

The R 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 R 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 R AT_FDCWD , then pathname is interpreted relative to the current working directory of the calling process (like mkfifo(3)). If R pathname is absolute, then dirfd is ignored.

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

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

EBADF

ENOTDIR

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

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

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

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