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 3.54 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/.