bd6060a1c6
are aliases for the syscall stubs and are plt-interposed, to the libc-private aliases of internally interposed sigprocmask() etc. Since e.g. _sigaction is not interposed by libthr, calling signal() removes thr_sighandler() from the handler slot etc. The result was breaking signal semantic and rtld locking. The added __libc_sigprocmask and other symbols are hidden, they are not exported and cannot be called through PLT. The setjmp/longjmp functions for x86 were changed to use direct calls, and since PIC_PROLOGUE only needed for functional PLT indirection on i386, it is removed as well. The PowerPC bug of calling the syscall directly in the setjmp/longjmp implementation is kept as is. Reported by: Pete French <petefrench@ingresso.co.uk> Tested by: Michiel Boland <boland37@xs4all.nl> Reviewed by: jilles (previous version) Sponsored by: The FreeBSD Foundation MFC after: 1 week
94 lines
2.8 KiB
C
94 lines
2.8 KiB
C
/*-
|
|
* Copyright (c) 1990, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to Berkeley by
|
|
* Chris Torek.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#if defined(LIBC_SCCS) && !defined(lint)
|
|
static char sccsid[] = "@(#)tmpfile.c 8.1 (Berkeley) 6/4/93";
|
|
#endif /* LIBC_SCCS and not lint */
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include "namespace.h"
|
|
#include <sys/types.h>
|
|
#include <signal.h>
|
|
#include <unistd.h>
|
|
#include <errno.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <paths.h>
|
|
#include "un-namespace.h"
|
|
#include "libc_private.h"
|
|
|
|
FILE *
|
|
tmpfile(void)
|
|
{
|
|
sigset_t set, oset;
|
|
FILE *fp;
|
|
int fd, sverrno;
|
|
#define TRAILER "tmp.XXXXXX"
|
|
char *buf;
|
|
const char *tmpdir;
|
|
|
|
tmpdir = NULL;
|
|
if (issetugid() == 0)
|
|
tmpdir = getenv("TMPDIR");
|
|
if (tmpdir == NULL)
|
|
tmpdir = _PATH_TMP;
|
|
|
|
(void)asprintf(&buf, "%s%s%s", tmpdir,
|
|
(tmpdir[strlen(tmpdir) - 1] == '/') ? "" : "/", TRAILER);
|
|
if (buf == NULL)
|
|
return (NULL);
|
|
|
|
sigfillset(&set);
|
|
(void)__libc_sigprocmask(SIG_BLOCK, &set, &oset);
|
|
|
|
fd = mkstemp(buf);
|
|
if (fd != -1)
|
|
(void)unlink(buf);
|
|
|
|
free(buf);
|
|
|
|
(void)__libc_sigprocmask(SIG_SETMASK, &oset, NULL);
|
|
|
|
if (fd == -1)
|
|
return (NULL);
|
|
|
|
if ((fp = fdopen(fd, "w+")) == NULL) {
|
|
sverrno = errno;
|
|
(void)_close(fd);
|
|
errno = sverrno;
|
|
return (NULL);
|
|
}
|
|
return (fp);
|
|
}
|