Section: Linux Programmer's Manual (2)
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fchmodat - change permissions of a file relative to a directory file descriptor
#include <fcntl.h> /* Definition of AT_* constants */
int fchmodat(int dirfd, const char *pathname, mode_t mode, int flags);
Feature Test Macro Requirements for glibc (see
- Since glibc 2.10:
_XOPEN_SOURCE >= 700 || _POSIX_C_SOURCE >= 200809L
- Before glibc 2.10:
system call operates in exactly the same way as
except for the differences described in this manual page.
If the pathname given in
is relative, then it is interpreted relative to the directory
referred to by the file descriptor
(rather than relative to the current working directory of
the calling process, as is done by
for a relative pathname).
is relative and
is the special value
is interpreted relative to the current working
directory of the calling process (like
is absolute, then
can either be 0, or include the following flag:
is a symbolic link, do not dereference it:
instead operate on the link itself.
This flag is not currently implemented.
On error, -1 is returned and
is set to indicate the error.
The same errors that occur for
can also occur for
The following additional errors can occur for
is not a valid file descriptor.
Invalid flag specified in
is relative and
is a file descriptor referring to a file other than a directory.
which is not supported.
was added to Linux in kernel 2.6.16;
library support was added to glibc in version 2.4.
for an explanation of the need for
The GNU C library wrapper function implements the POSIX-specified
interface described in this page.
This interface differs from the underlying Linux system call, which does
This page is part of release 3.54 of the Linux
A description of the project,
and information about reporting bugs,
can be found at
- RETURN VALUE
- CONFORMING TO
- SEE ALSO
This document was created by
using the manual pages.
Time: 08:18:15 GMT, January 22, 2018