mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-27 07:20:11 +00:00
221dc560bb
so the label is not considered unused. * sysdeps/mach/hurd/pwrite64.c: New file. * sysdeps/mach/hurd/pread64.c: New file. * sysdeps/mach/hurd/pread.c (__libc_pread): Define this name, with __pread as an alias. * sysdeps/mach/hurd/pwrite.c (__libc_pwrite): Define this name, with __pwrite as an alias. Implement POSIX "shared memory objects" as regular files residing in the /var/run/shm/ directory. This works on any system that supports _POSIX_MAPPED_FILES, to make it also support _POSIX_SHARED_MEMORY_OBJECTS. * sysdeps/posix/shm_open.c: New file. * sysdeps/posix/shm_unlink.c: New file. * sysdeps/mach/hurd/bits/posix_opt.h (_POSIX_SHARED_MEMORY_OBJECTS): Define it. * rt/aio_notify.c (__aio_notify_only) [! _POSIX_REALTIME_SIGNALS]: Use raise instead of __aio_sigqueue.
63 lines
1.7 KiB
C
63 lines
1.7 KiB
C
/* shm_unlink -- remove a POSIX shared memory object. Generic POSIX version.
|
|
Copyright (C) 2001 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 Library General Public License as
|
|
published by the Free Software Foundation; either version 2 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
|
|
Library General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Library General Public
|
|
License along with the GNU C Library; see the file COPYING.LIB. If not,
|
|
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
Boston, MA 02111-1307, USA. */
|
|
|
|
#include <unistd.h>
|
|
|
|
#if ! _POSIX_MAPPED_FILES
|
|
#include <sysdeps/generic/shm_unlink.c>
|
|
|
|
#else
|
|
|
|
#include <errno.h>
|
|
#include <sys/mman.h>
|
|
#include <string.h>
|
|
#include <stdlib.h>
|
|
#include <paths.h>
|
|
|
|
#define SHMDIR (_PATH_VARRUN "shm/")
|
|
|
|
/* Remove shared memory object. */
|
|
int
|
|
shm_unlink (const char *name)
|
|
{
|
|
size_t namelen;
|
|
char *fname;
|
|
|
|
/* Construct the filename. */
|
|
while (name[0] == '/')
|
|
++name;
|
|
|
|
if (name[0] == '\0')
|
|
{
|
|
/* The name "/" is not supported. */
|
|
__set_errno (EINVAL);
|
|
return -1;
|
|
}
|
|
|
|
namelen = strlen (name);
|
|
fname = (char *) __alloca (sizeof SHMDIR - 1 + namelen + 1);
|
|
__mempcpy (__mempcpy (fname, SHMDIR, sizeof SHMDIR - 1),
|
|
name, namelen + 1);
|
|
|
|
|
|
return __unlink (name);
|
|
}
|
|
|
|
#endif
|