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MKNODAT(2) Linux Programmer's Manual MKNODAT(2)
mknodat - create a special or ordinary file relative to a directory file
descriptor
#include <fcntl.h> /* Definition of AT_* constants */
#include <sys/stat.h>
int mknodat(int dirfd, const char *pathname, mode_t mode, dev_t dev);
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
mknodat():
Since glibc 2.10:
_XOPEN_SOURCE >= 700
Before glibc 2.10:
_ATFILE_SOURCE
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.
On success, mknodat() returns 0. On error, -1 is returned and errno is set to
indicate the error.
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.
mknodat() was added to Linux in kernel 2.6.16.
POSIX.1-2008.
See openat(2) for an explanation of the need for mknodat().
mknod(2), openat(2), path_resolution(7)
This page is part of release 3.32 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 2010-09-20 MKNODAT(2)
HTML rendering created 2010-12-03 by Michael Kerrisk, author of The Linux Programming Interface