glibc/posix/shm-directory.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

48 lines
1.6 KiB
C

/* Determine directory for shm/sem files. Generic POSIX version.
Copyright (C) 2014-2022 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>
#if _POSIX_MAPPED_FILES
#include <alloc_buffer.h>
#include <shm-directory.h>
#include <string.h>
int
__shm_get_name (struct shmdir_name *result, const char *name, bool sem_prefix)
{
while (name[0] == '/')
++name;
size_t namelen = strlen (name);
struct alloc_buffer buffer
= alloc_buffer_create (result->name, sizeof (result->name));
alloc_buffer_copy_bytes (&buffer, SHMDIR, strlen (SHMDIR));
if (sem_prefix)
alloc_buffer_copy_bytes (&buffer, "sem.", strlen ("sem."));
alloc_buffer_copy_bytes (&buffer, name, namelen + 1);
if (namelen == 0 || memchr (name, '/', namelen) != NULL
|| alloc_buffer_has_failed (&buffer))
return -1;
return 0;
}
libc_hidden_def (__shm_get_name)
#endif