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FSTATAT(2) Linux Programmer's Manual FSTATAT(2)
fstatat - get file status relative to a directory file descriptor
int fstatat(int dirfd, const char *path, struct stat *buf, int flags);
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 rela-
tive 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 work-
ing 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:
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).)
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.
path is a relative path and dirfd is a file descriptor referring
to a file other than a directory.
See openat(2) for an explanation of the need for fstatat().
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.
fstatat() was added to Linux in kernel 2.6.16.
openat(2), path_resolution(2), stat(2)
Linux 2.6.16 2006-04-30 FSTATAT(2)
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