fstatat() - Unix, Linux System Call
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NAME
fstatat - get file status relative to a directory file descriptor
SYNOPSIS
#include <sys/stat.h>
int fstatat(int dirfd, const char *path, struct stat *
buf ", int " flags );
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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
path 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 the pathname given in
path is relative and
dirfd is the special value
AT_FDCWD, then
path is interpreted relative to the current working
directory of the calling process (like
stat(2)).
If the pathname given in
path is absolute, then
dirfd is ignored.
flags can either be 0, or include the following flag:
Tag | Description |
AT_SYMLINK_NOFOLLOW |
If
path 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).)
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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():
Tag | Description |
EBADF |
dirfd is not a valid file descriptor.
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EINVAL |
Invalid flag specified in
flags. |
ENOTDIR |
path is a relative path and
dirfd is a file descriptor referring to a file other than a directory.
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NOTES
See openat(2)
for an explanation of the need for
fstatat().
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
fstatat() was added to Linux in kernel 2.6.16.
SEE ALSO
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