mknodat man page on Oracle

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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:
		_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; library support was
       added to glibc in version 2.4.

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 3.53 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			    MKNODAT(2)
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