| NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | VERSIONS | CONFORMING TO | NOTES | SEE ALSO | COLOPHON | The Linux Programming Interface |
FSTATAT(2) Linux Programmer's Manual FSTATAT(2)
fstatat - get file status relative to a directory file descriptor
#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
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).)
On success, fstatat() returns 0. On error, -1 is returned and errno
is set to indicate the error.
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.
fstatat() was added to Linux in kernel 2.6.16; library support was
added to glibc in version 2.4.
POSIX.1-2008. A similar system call exists on Solaris.
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().
openat(2), stat(2), path_resolution(7), symlink(7)
This page is part of release 3.51 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 FSTATAT(2)
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