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NAME

       fstatat - get file status relative to a directory file descriptor

SYNOPSIS

       #include <fcntl.h> /* Definition of AT_* constants */
       #include <sys/stat.h>

       int fstatat(int dirfd, const char *pathname, struct stat *buf,
                   int flags);

   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

       fstatat():
           Since glibc 2.10:
               _XOPEN_SOURCE >= 700 || _POSIX_C_SOURCE >= 200809L
           Before glibc 2.10:
               _ATFILE_SOURCE

DESCRIPTION

       The  fstatat()  system  call  operates  in exactly the same way as stat(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 stat(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
       stat(2)).

       If pathname is absolute, then dirfd is ignored.

       flags can either be 0, or include one or more of the following flags ORed:

       AT_NO_AUTOMOUNT (since Linux 2.6.38)
              Don't automount the  terminal  ("basename")  component  of  pathname  if  it  is  a
              directory  that is an automount point.  This allows the caller to gather attributes
              of an automount point (rather than the location it would mount).  This flag can  be
              used  in tools that scan directories to prevent mass-automounting of a directory of
              automount points.  The AT_NO_AUTOMOUNT flag has no effect if the  mount  point  has
              already been mounted over.

       AT_SYMLINK_NOFOLLOW
              If  pathname  is a symbolic link, do not dereference it: instead return information
              about the link itself, like lstat(2).  (By default, fstatat() dereferences symbolic
              links, like stat(2).)

RETURN VALUE

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

ERRORS

       The same errors that occur for stat(2)  can  also  occur  for  fstatat().   The  following
       additional errors can occur for fstatat():

       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.

VERSIONS

       fstatat() was added to Linux in kernel 2.6.16.

CONFORMING TO

       POSIX.1-2008.  A similar system call exists on Solaris.

NOTES

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

       The underlying system call employed by the glibc fstatat() wrapper  function  is  actually
       called fstatat64().

SEE ALSO

       openat(2), stat(2), path_resolution(7), symlink(7)

COLOPHON

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