MKDIRAT

Section: Linux Programmer's Manual (2)
Updated: 2008-08-21
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NAME

mkdirat - create a directory relative to a directory file descriptor

SYNOPSIS

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

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

DESCRIPTION

The mkdirat() system call operates in exactly the same way as mkdir(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 mkdir(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 mkdir(2)).

If pathname is absolute, then dirfd is ignored.

RETURN VALUE

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

ERRORS

The same errors that occur for mkdir(2) can also occur for mkdirat(). The following additional errors can occur for mkdirat():

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

mkdirat() was added to Linux in kernel 2.6.16.

CONFORMING TO

POSIX.1-2008.

NOTES

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

COLOPHON

This page is part of release 3.22 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/.