MKNODAT(2) Linux Programmers Manual MKNODAT(2)
NAME
mknodat - create a special or ordinary file relative to a directory
file descriptor
SYNOPSIS
#define _ATFILE_SOURCE
#include /* Definition of AT_* constants */
#include
int mknodat(int dirfd, const char *pathname, mode_t mode, dev_t dev);
DESCRIPTION
The mknodat() system call operates in exactly the same way as mknod(2),
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 mknod(2) 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 mknod(2)).
If pathname is absolute, then dirfd is ignored.
RETURN VALUE
On success, mknodat() returns 0. On error, -1 is returned and errno is
set to indicate the error.
ERRORS
The same errors that occur for mknod(2) can also occur for mknodat().
The following additional errors can occur for mknodat():
EBADF dirfd is not a valid file descriptor.
ENOTDIR
pathname is relative and dirfd is a file descriptor referring to
a file other than a directory.
VERSIONS
mknodat() was added to Linux in kernel 2.6.16.
CONFORMING TO
This system call is non-standard but is proposed for inclusion in a
future revision of POSIX.1.
NOTES
See openat(2) for an explanation of the need for mknodat().
SEE ALSO
mknod(2), openat(2), path_resolution(7)
COLOPHON
This page is part of release 3.05 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 2006-04-06 MKNODAT(2)
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