linux man page for mknodat

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

NAME
       mknodat - create a special or ordinary file relative to a directory file descriptor

SYNOPSIS
       #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:cw
		_XOPEN_SOURCE >= 700
	   Before glibc 2.10:
	       _ATFILE_SOURCE

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
       POSIX.1-2008.

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 3.27 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)