* Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
* Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; only version 2 of the License.
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License, version 2 only,
+ * as published by the Free Software Foundation.
*
* This program 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 General Public License for
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
- * Place - Suite 330, Boston, MA 02111-1307, USA.
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#define _GNU_SOURCE
#define RUNAS_CHILD_STACK_SIZE 10485760
+#ifndef MAP_STACK
+#define MAP_STACK 0
+#endif
+
#ifdef __FreeBSD__
/* FreeBSD MAP_STACK always return -ENOMEM */
#define LTTNG_MAP_STACK 0
if (data->gid != getegid()) {
ret = setegid(data->gid);
if (ret < 0) {
- perror("setegid");
+ PERROR("setegid");
return EXIT_FAILURE;
}
}
if (data->uid != geteuid()) {
ret = seteuid(data->uid);
if (ret < 0) {
- perror("seteuid");
+ PERROR("seteuid");
return EXIT_FAILURE;
}
}
writelen = write(data->retval_pipe, &sendret.c[index],
writeleft);
if (writelen < 0) {
- perror("write");
+ PERROR("write");
return EXIT_FAILURE;
}
writeleft -= writelen;
ret = pipe(retval_pipe);
if (ret < 0) {
- perror("pipe");
+ PERROR("pipe");
retval.i = ret;
goto end;
}
MAP_PRIVATE | MAP_GROWSDOWN | MAP_ANONYMOUS | LTTNG_MAP_STACK,
-1, 0);
if (child_stack == MAP_FAILED) {
- perror("mmap");
+ PERROR("mmap");
retval.i = -ENOMEM;
goto close_pipe;
}
pid = lttng_clone_files(child_run_as, child_stack + (RUNAS_CHILD_STACK_SIZE / 2),
&run_as_data);
if (pid < 0) {
- perror("clone");
+ PERROR("clone");
retval.i = pid;
goto unmap_stack;
}
do {
readlen = read(retval_pipe[0], &retval.c[index], readleft);
if (readlen < 0) {
- perror("read");
+ PERROR("read");
ret = -1;
break;
}
*/
pid = waitpid(pid, &status, 0);
if (pid < 0 || !WIFEXITED(status) || WEXITSTATUS(status) != 0) {
- perror("wait");
+ PERROR("wait");
retval.i = -1;
}
unmap_stack:
ret = munmap(child_stack, RUNAS_CHILD_STACK_SIZE);
if (ret < 0) {
- perror("munmap");
+ PERROR("munmap");
retval.i = ret;
}
close_pipe:
- close(retval_pipe[0]);
- close(retval_pipe[1]);
+ ret = close(retval_pipe[0]);
+ if (ret) {
+ PERROR("close");
+ }
+ ret = close(retval_pipe[1]);
+ if (ret) {
+ PERROR("close");
+ }
end:
return retval.i;
}
int run_as(int (*cmd)(void *data), void *data, uid_t uid, gid_t gid)
{
if (!getenv("LTTNG_DEBUG_NOCLONE")) {
+ int ret;
+
DBG("Using run_as_clone");
- return run_as_clone(cmd, data, uid, gid);
+ pthread_mutex_lock(<tng_libc_state_lock);
+ ret = run_as_clone(cmd, data, uid, gid);
+ pthread_mutex_unlock(<tng_libc_state_lock);
+ return ret;
} else {
DBG("Using run_as_noclone");
return run_as_noclone(cmd, data, uid, gid);