glibc/hurd/fchroot.c
Paul Eggert 581c785bf3 Update copyright dates with scripts/update-copyrights
I used these shell commands:

../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright
(cd ../glibc && git commit -am"[this commit message]")

and then ignored the output, which consisted lines saying "FOO: warning:
copyright statement not found" for each of 7061 files FOO.

I then removed trailing white space from math/tgmath.h,
support/tst-support-open-dev-null-range.c, and
sysdeps/x86_64/multiarch/strlen-vec.S, to work around the following
obscure pre-commit check failure diagnostics from Savannah.  I don't
know why I run into these diagnostics whereas others evidently do not.

remote: *** 912-#endif
remote: *** 913:
remote: *** 914-
remote: *** error: lines with trailing whitespace found
...
remote: *** error: sysdeps/unix/sysv/linux/statx_cp.c: trailing lines
2022-01-01 11:40:24 -08:00

50 lines
1.4 KiB
C

/* Copyright (C) 1999-2022 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <unistd.h>
#include <hurd.h>
#include <hurd/fd.h>
#include <hurd/port.h>
/* Change the current root directory to FD. */
int
fchroot (int fd)
{
error_t err;
file_t dir;
err = HURD_DPORT_USE (fd,
({
dir = __file_name_lookup_under (port, ".", 0, 0);
dir == MACH_PORT_NULL ? errno : 0;
}));
if (! err)
{
file_t root;
/* Prevent going through DIR's .. */
err = __file_reparent (dir, MACH_PORT_NULL, &root);
__mach_port_deallocate (__mach_task_self (), dir);
if (! err)
_hurd_port_set (&_hurd_ports[INIT_PORT_CRDIR], root);
}
return err ? __hurd_fail (err) : 0;
}