mkdirat() - Unix, Linux System Call

NAME

mkdirat - create a directory relative to a directory file descriptor

SYNOPSIS

#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 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 mkdir(2)).

If the pathname given in 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():

Tag	Description
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 mkdirat().

CONFORMING TO

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

VERSIONS

mkdirat() was added to Linux in kernel 2.6.16.