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/.