2:fchownat

From Linux Man Pages

      fchownat - change ownership of a file relative to a directory file descriptor
      

Contents 1 SYNOPSIS 2 DESCRIPTION 3 RETURN VALUE 4 ERRORS 5 NOTES 6 CONFORMING TO 7 VERSIONS 8 RELATED 9 CATEGORY

SYNOPSIS

      #include <unistd.h>
 
      int fchownat(int dirfd, const char *pathname,
                   uid_t owner, gid_t group, int flags);

DESCRIPTION

      The  fchownat() system call operates in exactly the same way as chown(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 chown(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 chown(2)).
 
      If pathname is absolute, then dirfd is ignored.
 
      flags can either be 0, or include the following flag:
 
      AT_SYMLINK_NOFOLLOW
             If pathname is a symbolic link, do not dereference it: instead operate on the link itself, like lchown(2).
             (By default, fchownat() dereferences symbolic links, like chown(2).)

RETURN VALUE

      On success, fchownat() returns 0.  On error, -1 is returned and errno is set to indicate the error.

ERRORS

      The same errors that occur for chown(2) can also occur for fchownat().  The following additional errors can occur
      for fchownat():
 
      EBADF  dirfd is not a valid file descriptor.
 
      EINVAL Invalid flag specified in flags.
 
      ENOTDIR
             pathname is relative and dirfd is a file descriptor referring to a file other than a directory.

NOTES

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

CONFORMING TO

      This system call is non-standard but is proposed for inclusion in a future revision of POSIX.1.  A similar system
      call exists on Solaris.

VERSIONS

      fchownat() was added to Linux in kernel 2.6.16.

RELATED

      chown(2), openat(2), path_resolution(2)

CATEGORY