glibc/sysdeps/posix/shm_unlink.c
Roland McGrath f0b1a6c876 * hurd/Versions (libc: GLIBC_2.2.5): New set; add _hurd_raise_signal,
_hurdsig_interrupt_timeout, _hurdsig_fault_preemptor.

	* sysdeps/posix/shm_unlink.c (shm_unlink): __unlink -> unlink.

	* mach/Versions (libc: GLIBC_2.2.5): New set; add __mach_msg_destroy,
	__mach_reply_port.
2001-08-24 21:47:53 +00:00

63 lines
1.6 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 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, 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