[lttng-tools.git] / src / common / runas.c

/*
 * 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, 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
 * 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.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#define _GNU_SOURCE
#define _LGPL_SOURCE
#include <errno.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/wait.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <fcntl.h>
#include <sched.h>
#include <sys/signal.h>

#include <common/common.h>
#include <common/utils.h>
#include <common/compat/mman.h>
#include <common/compat/clone.h>
#include <common/compat/getenv.h>

#include "runas.h"

#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
#else
#define LTTNG_MAP_STACK		MAP_STACK
#endif

#ifndef MAP_GROWSDOWN
#define MAP_GROWSDOWN		0
#endif

#ifndef MAP_ANONYMOUS
#define MAP_ANONYMOUS		MAP_ANON
#endif

struct run_as_data {
	int (*cmd)(void *data);
	void *data;
	uid_t uid;
	gid_t gid;
	int retval_pipe;
};

struct run_as_mkdir_data {
	const char *path;
	mode_t mode;
};

struct run_as_open_data {
	const char *path;
	int flags;
	mode_t mode;
};

struct run_as_unlink_data {
	const char *path;
};

struct run_as_recursive_rmdir_data {
	const char *path;
};

#ifdef VALGRIND
static
int use_clone(void)
{
	return 0;
}
#else
static
int use_clone(void)
{
	return !lttng_secure_getenv("LTTNG_DEBUG_NOCLONE");
}
#endif

LTTNG_HIDDEN
int _utils_mkdir_recursive_unsafe(const char *path, mode_t mode);

/*
 * Create recursively directory using the FULL path.
 */
static
int _mkdir_recursive(void *_data)
{
	struct run_as_mkdir_data *data = _data;
	const char *path;
	mode_t mode;

	path = data->path;
	mode = data->mode;

	/* Safe to call as we have transitioned to the requested uid/gid. */
	return _utils_mkdir_recursive_unsafe(path, mode);
}

static
int _mkdir(void *_data)
{
	int ret;
	struct run_as_mkdir_data *data = _data;

	ret = mkdir(data->path, data->mode);
	if (ret < 0) {
		ret = -errno;
	}

	return ret;
}

static
int _open(void *_data)
{
	struct run_as_open_data *data = _data;
	return open(data->path, data->flags, data->mode);
}

static
int _unlink(void *_data)
{
	int ret;
	struct run_as_unlink_data *data = _data;

	ret = unlink(data->path);
	if (ret < 0) {
		ret = -errno;
	}

	return ret;
}

static
int _recursive_rmdir(void *_data)
{
	int ret;
	struct run_as_recursive_rmdir_data *data = _data;

	ret = utils_recursive_rmdir(data->path);
	if (ret < 0) {
		ret = -errno;
	}

	return ret;
}

static
int child_run_as(void *_data)
{
	int ret;
	struct run_as_data *data = _data;
	ssize_t writelen;
	int sendret;

	/*
	 * Child: it is safe to drop egid and euid while sharing the
	 * file descriptors with the parent process, since we do not
	 * drop "uid": therefore, the user we are dropping egid/euid to
	 * cannot attach to this process with, e.g. ptrace, nor map this
	 * process memory.
	 */
	if (data->gid != getegid()) {
		ret = setegid(data->gid);
		if (ret < 0) {
			PERROR("setegid");
			sendret = -1;
			goto write_return;
		}
	}
	if (data->uid != geteuid()) {
		ret = seteuid(data->uid);
		if (ret < 0) {
			PERROR("seteuid");
			sendret = -1;
			goto write_return;
		}
	}
	/*
	 * Also set umask to 0 for mkdir executable bit.
	 */
	umask(0);
	sendret = (*data->cmd)(data->data);

write_return:
	/* send back return value */
	writelen = lttng_write(data->retval_pipe, &sendret, sizeof(sendret));
	if (writelen < sizeof(sendret)) {
		PERROR("lttng_write error");
		return EXIT_FAILURE;
	} else {
		return EXIT_SUCCESS;
	}
}

static
int run_as_clone(int (*cmd)(void *data), void *data, uid_t uid, gid_t gid)
{
	struct run_as_data run_as_data;
	int ret = 0;
	ssize_t readlen;
	int status;
	pid_t pid;
	int retval_pipe[2];
	void *child_stack;
	int retval;

	/*
	 * If we are non-root, we can only deal with our own uid.
	 */
	if (geteuid() != 0) {
		if (uid != geteuid()) {
			ERR("Client (%d)/Server (%d) UID mismatch (and sessiond is not root)",
				uid, geteuid());
			return -EPERM;
		}
	}

	ret = pipe(retval_pipe);
	if (ret < 0) {
		PERROR("pipe");
		retval = ret;
		goto end;
	}
	run_as_data.data = data;
	run_as_data.cmd = cmd;
	run_as_data.uid = uid;
	run_as_data.gid = gid;
	run_as_data.retval_pipe = retval_pipe[1];	/* write end */
	child_stack = mmap(NULL, RUNAS_CHILD_STACK_SIZE,
		PROT_WRITE | PROT_READ,
		MAP_PRIVATE | MAP_GROWSDOWN | MAP_ANONYMOUS | LTTNG_MAP_STACK,
		-1, 0);
	if (child_stack == MAP_FAILED) {
		PERROR("mmap");
		retval = -ENOMEM;
		goto close_pipe;
	}
	/*
	 * Pointing to the middle of the stack to support architectures
	 * where the stack grows up (HPPA).
	 */
	pid = lttng_clone_files(child_run_as, child_stack + (RUNAS_CHILD_STACK_SIZE / 2),
		&run_as_data);
	if (pid < 0) {
		PERROR("clone");
		retval = pid;
		goto unmap_stack;
	}
	/* receive return value */
	readlen = lttng_read(retval_pipe[0], &retval, sizeof(retval));
	if (readlen < sizeof(retval)) {
		ret = -1;
	}

	/*
	 * Parent: wait for child to return, in which case the
	 * shared memory map will have been created.
	 */
	pid = waitpid(pid, &status, 0);
	if (pid < 0 || !WIFEXITED(status) || WEXITSTATUS(status) != 0) {
		PERROR("wait");
		retval = -1;
	}
unmap_stack:
	ret = munmap(child_stack, RUNAS_CHILD_STACK_SIZE);
	if (ret < 0) {
		PERROR("munmap");
		retval = ret;
	}
close_pipe:
	ret = close(retval_pipe[0]);
	if (ret) {
		PERROR("close");
	}
	ret = close(retval_pipe[1]);
	if (ret) {
		PERROR("close");
	}
end:
	return retval;
}

/*
 * To be used on setups where gdb has issues debugging programs using
 * clone/rfork. Note that this is for debuging ONLY, and should not be
 * considered secure.
 */
static
int run_as_noclone(int (*cmd)(void *data), void *data, uid_t uid, gid_t gid)
{
	int ret;
	mode_t old_mask;

	old_mask = umask(0);
	ret = cmd(data);
	umask(old_mask);

	return ret;
}

static
int run_as(int (*cmd)(void *data), void *data, uid_t uid, gid_t gid)
{
	if (use_clone()) {
		int ret;

		DBG("Using run_as_clone");
		pthread_mutex_lock(&lttng_libc_state_lock);
		ret = run_as_clone(cmd, data, uid, gid);
		pthread_mutex_unlock(&lttng_libc_state_lock);
		return ret;
	} else {
		DBG("Using run_as_noclone");
		return run_as_noclone(cmd, data, uid, gid);
	}
}

LTTNG_HIDDEN
int run_as_mkdir_recursive(const char *path, mode_t mode, uid_t uid, gid_t gid)
{
	struct run_as_mkdir_data data;

	DBG3("mkdir() recursive %s with mode %d for uid %d and gid %d",
			path, mode, uid, gid);
	data.path = path;
	data.mode = mode;
	return run_as(_mkdir_recursive, &data, uid, gid);
}

LTTNG_HIDDEN
int run_as_mkdir(const char *path, mode_t mode, uid_t uid, gid_t gid)
{
	struct run_as_mkdir_data data;

	DBG3("mkdir() %s with mode %d for uid %d and gid %d",
			path, mode, uid, gid);
	data.path = path;
	data.mode = mode;
	return run_as(_mkdir, &data, uid, gid);
}

/*
 * Note: open_run_as is currently not working. We'd need to pass the fd
 * opened in the child to the parent.
 */
LTTNG_HIDDEN
int run_as_open(const char *path, int flags, mode_t mode, uid_t uid, gid_t gid)
{
	struct run_as_open_data data;

	DBG3("open() %s with flags %X mode %d for uid %d and gid %d",
			path, flags, mode, uid, gid);
	data.path = path;
	data.flags = flags;
	data.mode = mode;
	return run_as(_open, &data, uid, gid);
}

LTTNG_HIDDEN
int run_as_unlink(const char *path, uid_t uid, gid_t gid)
{
	struct run_as_unlink_data data;

	DBG3("unlink() %s with for uid %d and gid %d",
			path, uid, gid);
	data.path = path;
	return run_as(_unlink, &data, uid, gid);
}

LTTNG_HIDDEN
int run_as_recursive_rmdir(const char *path, uid_t uid, gid_t gid)
{
	struct run_as_recursive_rmdir_data data;

	DBG3("recursive_rmdir() %s with for uid %d and gid %d",
			path, uid, gid);
	data.path = path;
	return run_as(_recursive_rmdir, &data, uid, gid);
}
Commit	Line	Data
60b6c79c MD	1	/*
	2	* Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
	3	* Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
	4	*
d14d33bf AM	5	* This program is free software; you can redistribute it and/or modify
	6	* it under the terms of the GNU General Public License, version 2 only,
	7	* as published by the Free Software Foundation.
60b6c79c MD	8	*
	9	* This program is distributed in the hope that it will be useful, but WITHOUT
	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
d14d33bf	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
60b6c79c MD	12	* more details.
60b6c79c MD	13	*
d14d33bf AM	14	* You should have received a copy of the GNU General Public License along
	15	* with this program; if not, write to the Free Software Foundation, Inc.,
	16	* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
60b6c79c MD	17	*/
	18
	19	#define _GNU_SOURCE
6c1c0768	20	#define _LGPL_SOURCE
60b6c79c MD	21	#include <errno.h>
	22	#include <limits.h>
	23	#include <stdio.h>
	24	#include <stdlib.h>
	25	#include <string.h>
	26	#include <sys/wait.h>
	27	#include <sys/types.h>
	28	#include <sys/stat.h>
	29	#include <unistd.h>
	30	#include <fcntl.h>
c2b75c49	31	#include <sched.h>
730389d9	32	#include <sys/signal.h>
60b6c79c	33
90e535ef	34	#include <common/common.h>
3fd15a74	35	#include <common/utils.h>
730389d9 DG	36	#include <common/compat/mman.h>
730389d9 DG	37	#include <common/compat/clone.h>
e8fa9fb0	38	#include <common/compat/getenv.h>
60b6c79c	39
0857097f DG	40	#include "runas.h"
0857097f DG	41
e11d277b	42	#define RUNAS_CHILD_STACK_SIZE 10485760
c2b75c49	43
1e4035fc AS	44	#ifndef MAP_STACK
	45	#define MAP_STACK 0
	46	#endif
	47
0756d557 MD	48	#ifdef __FreeBSD__
	49	/* FreeBSD MAP_STACK always return -ENOMEM */
	50	#define LTTNG_MAP_STACK 0
	51	#else
	52	#define LTTNG_MAP_STACK MAP_STACK
059e1d3d MD	53	#endif
059e1d3d MD	54
a5ae566a	55	#ifndef MAP_GROWSDOWN
edb025e8	56	#define MAP_GROWSDOWN 0
a5ae566a MD	57	#endif
	58
	59	#ifndef MAP_ANONYMOUS
	60	#define MAP_ANONYMOUS MAP_ANON
	61	#endif
	62
c2b75c49 MD	63	struct run_as_data {
	64	int (cmd)(void data);
	65	void *data;
	66	uid_t uid;
	67	gid_t gid;
	68	int retval_pipe;
	69	};
	70
e11d277b	71	struct run_as_mkdir_data {
60b6c79c MD	72	const char *path;
	73	mode_t mode;
	74	};
	75
e11d277b	76	struct run_as_open_data {
60b6c79c MD	77	const char *path;
	78	int flags;
	79	mode_t mode;
	80	};
	81
4628484a MD	82	struct run_as_unlink_data {
	83	const char *path;
	84	};
	85
	86	struct run_as_recursive_rmdir_data {
	87	const char *path;
	88	};
	89
8f0044bf MD	90	#ifdef VALGRIND
	91	static
	92	int use_clone(void)
	93	{
	94	return 0;
	95	}
	96	#else
	97	static
	98	int use_clone(void)
	99	{
e8fa9fb0	100	return !lttng_secure_getenv("LTTNG_DEBUG_NOCLONE");
8f0044bf MD	101	}
	102	#endif
	103
d77dded2 JG	104	LTTNG_HIDDEN
	105	int _utils_mkdir_recursive_unsafe(const char *path, mode_t mode);
	106
60b6c79c MD	107	/*
	108	* Create recursively directory using the FULL path.
	109	*/
	110	static
	111	int _mkdir_recursive(void *_data)
	112	{
e11d277b	113	struct run_as_mkdir_data *data = _data;
60b6c79c	114	const char *path;
60b6c79c	115	mode_t mode;
60b6c79c MD	116
	117	path = data->path;
	118	mode = data->mode;
	119
d77dded2 JG	120	/* Safe to call as we have transitioned to the requested uid/gid. */
d77dded2 JG	121	return _utils_mkdir_recursive_unsafe(path, mode);
60b6c79c MD	122	}
	123
	124	static
	125	int _mkdir(void *_data)
	126	{
7ce36756	127	int ret;
e11d277b	128	struct run_as_mkdir_data *data = _data;
7ce36756 DG	129
	130	ret = mkdir(data->path, data->mode);
	131	if (ret < 0) {
	132	ret = -errno;
	133	}
	134
	135	return ret;
60b6c79c MD	136	}
	137
	138	static
	139	int _open(void *_data)
	140	{
e11d277b	141	struct run_as_open_data *data = _data;
60b6c79c MD	142	return open(data->path, data->flags, data->mode);
	143	}
	144
4628484a MD	145	static
	146	int _unlink(void *_data)
	147	{
	148	int ret;
	149	struct run_as_unlink_data *data = _data;
	150
	151	ret = unlink(data->path);
	152	if (ret < 0) {
	153	ret = -errno;
	154	}
	155
	156	return ret;
	157	}
	158
	159	static
	160	int _recursive_rmdir(void *_data)
	161	{
	162	int ret;
	163	struct run_as_recursive_rmdir_data *data = _data;
	164
	165	ret = utils_recursive_rmdir(data->path);
	166	if (ret < 0) {
	167	ret = -errno;
	168	}
	169
	170	return ret;
	171	}
	172
c2b75c49 MD	173	static
	174	int child_run_as(void *_data)
	175	{
6775595e	176	int ret;
c2b75c49	177	struct run_as_data *data = _data;
6775595e	178	ssize_t writelen;
6cd525e8	179	int sendret;
c2b75c49 MD	180
	181	/*
	182	* Child: it is safe to drop egid and euid while sharing the
	183	* file descriptors with the parent process, since we do not
	184	* drop "uid": therefore, the user we are dropping egid/euid to
	185	* cannot attach to this process with, e.g. ptrace, nor map this
	186	* process memory.
	187	*/
1576d582 MD	188	if (data->gid != getegid()) {
	189	ret = setegid(data->gid);
	190	if (ret < 0) {
4c462e79	191	PERROR("setegid");
6cd525e8	192	sendret = -1;
6d73c4ef	193	goto write_return;
1576d582	194	}
c2b75c49	195	}
1576d582 MD	196	if (data->uid != geteuid()) {
	197	ret = seteuid(data->uid);
	198	if (ret < 0) {
4c462e79	199	PERROR("seteuid");
6cd525e8	200	sendret = -1;
6d73c4ef	201	goto write_return;
1576d582	202	}
c2b75c49 MD	203	}
	204	/*
	205	* Also set umask to 0 for mkdir executable bit.
	206	*/
	207	umask(0);
6cd525e8	208	sendret = (*data->cmd)(data->data);
6d73c4ef MD	209
6d73c4ef MD	210	write_return:
c2b75c49	211	/* send back return value */
6cd525e8 MD	212	writelen = lttng_write(data->retval_pipe, &sendret, sizeof(sendret));
	213	if (writelen < sizeof(sendret)) {
	214	PERROR("lttng_write error");
	215	return EXIT_FAILURE;
	216	} else {
	217	return EXIT_SUCCESS;
	218	}
c2b75c49 MD	219	}
c2b75c49 MD	220
60b6c79c	221	static
2d85a600	222	int run_as_clone(int (cmd)(void data), void *data, uid_t uid, gid_t gid)
60b6c79c	223	{
c2b75c49	224	struct run_as_data run_as_data;
60b6c79c	225	int ret = 0;
6cd525e8	226	ssize_t readlen;
c2b75c49	227	int status;
60b6c79c	228	pid_t pid;
c2b75c49	229	int retval_pipe[2];
d5bd7573	230	void *child_stack;
6cd525e8	231	int retval;
60b6c79c MD	232
	233	/*
	234	* If we are non-root, we can only deal with our own uid.
	235	*/
	236	if (geteuid() != 0) {
	237	if (uid != geteuid()) {
	238	ERR("Client (%d)/Server (%d) UID mismatch (and sessiond is not root)",
	239	uid, geteuid());
	240	return -EPERM;
	241	}
60b6c79c MD	242	}
60b6c79c MD	243
c2b75c49 MD	244	ret = pipe(retval_pipe);
c2b75c49 MD	245	if (ret < 0) {
4c462e79	246	PERROR("pipe");
6cd525e8	247	retval = ret;
60b6c79c	248	goto end;
c2b75c49 MD	249	}
	250	run_as_data.data = data;
	251	run_as_data.cmd = cmd;
	252	run_as_data.uid = uid;
	253	run_as_data.gid = gid;
	254	run_as_data.retval_pipe = retval_pipe[1]; /* write end */
e11d277b	255	child_stack = mmap(NULL, RUNAS_CHILD_STACK_SIZE,
d5bd7573	256	PROT_WRITE \| PROT_READ,
0756d557	257	MAP_PRIVATE \| MAP_GROWSDOWN \| MAP_ANONYMOUS \| LTTNG_MAP_STACK,
d5bd7573 MD	258	-1, 0);
d5bd7573 MD	259	if (child_stack == MAP_FAILED) {
4c462e79	260	PERROR("mmap");
6cd525e8	261	retval = -ENOMEM;
d5bd7573 MD	262	goto close_pipe;
	263	}
	264	/*
	265	* Pointing to the middle of the stack to support architectures
	266	* where the stack grows up (HPPA).
	267	*/
89831a74 MD	268	pid = lttng_clone_files(child_run_as, child_stack + (RUNAS_CHILD_STACK_SIZE / 2),
89831a74 MD	269	&run_as_data);
c2b75c49	270	if (pid < 0) {
4c462e79	271	PERROR("clone");
6cd525e8	272	retval = pid;
d5bd7573	273	goto unmap_stack;
c2b75c49 MD	274	}
c2b75c49 MD	275	/* receive return value */
6cd525e8 MD	276	readlen = lttng_read(retval_pipe[0], &retval, sizeof(retval));
	277	if (readlen < sizeof(retval)) {
	278	ret = -1;
	279	}
c2b75c49 MD	280
	281	/*
	282	* Parent: wait for child to return, in which case the
	283	* shared memory map will have been created.
	284	*/
47fb7563	285	pid = waitpid(pid, &status, 0);
c2b75c49	286	if (pid < 0 \|\| !WIFEXITED(status) \|\| WEXITSTATUS(status) != 0) {
4c462e79	287	PERROR("wait");
6cd525e8	288	retval = -1;
60b6c79c	289	}
d5bd7573	290	unmap_stack:
e11d277b	291	ret = munmap(child_stack, RUNAS_CHILD_STACK_SIZE);
d5bd7573	292	if (ret < 0) {
4c462e79	293	PERROR("munmap");
6cd525e8	294	retval = ret;
d5bd7573	295	}
c2b75c49	296	close_pipe:
4c462e79 MD	297	ret = close(retval_pipe[0]);
	298	if (ret) {
	299	PERROR("close");
	300	}
	301	ret = close(retval_pipe[1]);
	302	if (ret) {
	303	PERROR("close");
	304	}
60b6c79c	305	end:
6cd525e8	306	return retval;
60b6c79c MD	307	}
60b6c79c MD	308
2d85a600 MD	309	/*
	310	* To be used on setups where gdb has issues debugging programs using
	311	* clone/rfork. Note that this is for debuging ONLY, and should not be
	312	* considered secure.
	313	*/
	314	static
	315	int run_as_noclone(int (cmd)(void data), void *data, uid_t uid, gid_t gid)
	316	{
5b73926f DG	317	int ret;
	318	mode_t old_mask;
	319
	320	old_mask = umask(0);
	321	ret = cmd(data);
	322	umask(old_mask);
	323
	324	return ret;
2d85a600 MD	325	}
	326
	327	static
	328	int run_as(int (cmd)(void data), void *data, uid_t uid, gid_t gid)
	329	{
8f0044bf	330	if (use_clone()) {
9ef70f87 MD	331	int ret;
9ef70f87 MD	332
2d85a600	333	DBG("Using run_as_clone");
9ef70f87 MD	334	pthread_mutex_lock(&lttng_libc_state_lock);
	335	ret = run_as_clone(cmd, data, uid, gid);
	336	pthread_mutex_unlock(&lttng_libc_state_lock);
	337	return ret;
2d85a600 MD	338	} else {
	339	DBG("Using run_as_noclone");
	340	return run_as_noclone(cmd, data, uid, gid);
	341	}
	342	}
	343
90e535ef	344	LTTNG_HIDDEN
e11d277b	345	int run_as_mkdir_recursive(const char *path, mode_t mode, uid_t uid, gid_t gid)
60b6c79c	346	{
e11d277b	347	struct run_as_mkdir_data data;
60b6c79c MD	348
	349	DBG3("mkdir() recursive %s with mode %d for uid %d and gid %d",
	350	path, mode, uid, gid);
	351	data.path = path;
	352	data.mode = mode;
	353	return run_as(_mkdir_recursive, &data, uid, gid);
	354	}
	355
90e535ef	356	LTTNG_HIDDEN
e11d277b	357	int run_as_mkdir(const char *path, mode_t mode, uid_t uid, gid_t gid)
60b6c79c	358	{
e11d277b	359	struct run_as_mkdir_data data;
60b6c79c MD	360
	361	DBG3("mkdir() %s with mode %d for uid %d and gid %d",
	362	path, mode, uid, gid);
	363	data.path = path;
	364	data.mode = mode;
	365	return run_as(_mkdir, &data, uid, gid);
	366	}
	367
	368	/*
	369	* Note: open_run_as is currently not working. We'd need to pass the fd
	370	* opened in the child to the parent.
	371	*/
90e535ef	372	LTTNG_HIDDEN
e11d277b	373	int run_as_open(const char *path, int flags, mode_t mode, uid_t uid, gid_t gid)
60b6c79c	374	{
e11d277b	375	struct run_as_open_data data;
c2b75c49	376
47fb7563 MD	377	DBG3("open() %s with flags %X mode %d for uid %d and gid %d",
47fb7563 MD	378	path, flags, mode, uid, gid);
60b6c79c MD	379	data.path = path;
	380	data.flags = flags;
	381	data.mode = mode;
	382	return run_as(_open, &data, uid, gid);
60b6c79c	383	}
4628484a MD	384
	385	LTTNG_HIDDEN
	386	int run_as_unlink(const char *path, uid_t uid, gid_t gid)
	387	{
	388	struct run_as_unlink_data data;
	389
	390	DBG3("unlink() %s with for uid %d and gid %d",
	391	path, uid, gid);
	392	data.path = path;
	393	return run_as(_unlink, &data, uid, gid);
	394	}
	395
	396	LTTNG_HIDDEN
	397	int run_as_recursive_rmdir(const char *path, uid_t uid, gid_t gid)
	398	{
	399	struct run_as_recursive_rmdir_data data;
	400
	401	DBG3("recursive_rmdir() %s with for uid %d and gid %d",
	402	path, uid, gid);
	403	data.path = path;
	404	return run_as(_recursive_rmdir, &data, uid, gid);
	405	}