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MKDIRAT(2)			    Linux Programmer's Manual			       MKDIRAT(2)

NAME
       mkdirat - create a directory relative to a directory file descriptor

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

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

   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

       mkdirat():
	   Since glibc 2.10:
	       _XOPEN_SOURCE >= 700 || _POSIX_C_SOURCE >= 200809L
	   Before glibc 2.10:
	       _ATFILE_SOURCE

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  inter-
       preted 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 addi-
       tional 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; library support was added to glibc in  ver-
       sion 2.4.

CONFORMING TO
       POSIX.1-2008.

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

SEE ALSO
       mkdir(2), openat(2), path_resolution(7)

COLOPHON
       This  page  is  part of release 3.55 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					    2012-05-04				       MKDIRAT(2)
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