[thirdparty/git.git] / refs.c

#include "refs.h"
#include "cache.h"

#include <errno.h>

/* We allow "recursive" symbolic refs. Only within reason, though */
#define MAXDEPTH 5

const char *resolve_ref(const char *path, unsigned char *sha1, int reading)
{
	int depth = MAXDEPTH, len;
	char buffer[256];

	for (;;) {
		struct stat st;
		char *buf;
		int fd;

		if (--depth < 0)
			return NULL;

		/* Special case: non-existing file.
		 * Not having the refs/heads/new-branch is OK
		 * if we are writing into it, so is .git/HEAD
		 * that points at refs/heads/master still to be
		 * born.  It is NOT OK if we are resolving for
		 * reading.
		 */
		if (lstat(path, &st) < 0) {
			if (reading || errno != ENOENT)
				return NULL;
			memset(sha1, 0, 20);
			return path;
		}

		/* Follow "normalized" - ie "refs/.." symlinks by hand */
		if (S_ISLNK(st.st_mode)) {
			len = readlink(path, buffer, sizeof(buffer)-1);
			if (len >= 5 && !memcmp("refs/", buffer, 5)) {
				path = git_path("%.*s", len, buffer);
				continue;
			}
		}

		/*
		 * Anything else, just open it and try to use it as
		 * a ref
		 */
		fd = open(path, O_RDONLY);
		if (fd < 0)
			return NULL;
		len = read(fd, buffer, sizeof(buffer)-1);
		close(fd);

		/*
		 * Is it a symbolic ref?
		 */
		if (len < 4 || memcmp("ref:", buffer, 4))
			break;
		buf = buffer + 4;
		len -= 4;
		while (len && isspace(*buf))
			buf++, len--;
		while (len && isspace(buf[len-1]))
			buf[--len] = 0;
		path = git_path("%.*s", len, buf);
	}
	if (len < 40 || get_sha1_hex(buffer, sha1))
		return NULL;
	return path;
}

int create_symref(const char *git_HEAD, const char *refs_heads_master)
{
	const char *lockpath;
	char ref[1000];
	int fd, len, written;

#ifndef NO_SYMLINK_HEAD
	if (prefer_symlink_refs) {
		unlink(git_HEAD);
		if (!symlink(refs_heads_master, git_HEAD))
			return 0;
		fprintf(stderr, "no symlink - falling back to symbolic ref\n");
	}
#endif

	len = snprintf(ref, sizeof(ref), "ref: %s\n", refs_heads_master);
	if (sizeof(ref) <= len) {
		error("refname too long: %s", refs_heads_master);
		return -1;
	}
	lockpath = mkpath("%s.lock", git_HEAD);
	fd = open(lockpath, O_CREAT | O_EXCL | O_WRONLY, 0666);	
	written = write(fd, ref, len);
	close(fd);
	if (written != len) {
		unlink(lockpath);
		error("Unable to write to %s", lockpath);
		return -2;
	}
	if (rename(lockpath, git_HEAD) < 0) {
		unlink(lockpath);
		error("Unable to create %s", git_HEAD);
		return -3;
	}
	return 0;
}

int read_ref(const char *filename, unsigned char *sha1)
{
	if (resolve_ref(filename, sha1, 1))
		return 0;
	return -1;
}

static int do_for_each_ref(const char *base, int (*fn)(const char *path, const unsigned char *sha1), int trim)
{
	int retval = 0;
	DIR *dir = opendir(git_path("%s", base));

	if (dir) {
		struct dirent *de;
		int baselen = strlen(base);
		char *path = xmalloc(baselen + 257);

		if (!strncmp(base, "./", 2)) {
			base += 2;
			baselen -= 2;
		}
		memcpy(path, base, baselen);
		if (baselen && base[baselen-1] != '/')
			path[baselen++] = '/';

		while ((de = readdir(dir)) != NULL) {
			unsigned char sha1[20];
			struct stat st;
			int namelen;

			if (de->d_name[0] == '.')
				continue;
			namelen = strlen(de->d_name);
			if (namelen > 255)
				continue;
			memcpy(path + baselen, de->d_name, namelen+1);
			if (stat(git_path("%s", path), &st) < 0)
				continue;
			if (S_ISDIR(st.st_mode)) {
				retval = do_for_each_ref(path, fn, trim);
				if (retval)
					break;
				continue;
			}
			if (read_ref(git_path("%s", path), sha1) < 0) {
				error("%s points nowhere!", path);
				continue;
			}
			if (!has_sha1_file(sha1)) {
				error("%s does not point to a valid "
				      "commit object!", path);
				continue;
			}
			retval = fn(path + trim, sha1);
			if (retval)
				break;
		}
		free(path);
		closedir(dir);
	}
	return retval;
}

int head_ref(int (*fn)(const char *path, const unsigned char *sha1))
{
	unsigned char sha1[20];
	if (!read_ref(git_path("HEAD"), sha1))
		return fn("HEAD", sha1);
	return 0;
}

int for_each_ref(int (*fn)(const char *path, const unsigned char *sha1))
{
	return do_for_each_ref("refs", fn, 0);
}

int for_each_tag_ref(int (*fn)(const char *path, const unsigned char *sha1))
{
	return do_for_each_ref("refs/tags", fn, 10);
}

int for_each_branch_ref(int (*fn)(const char *path, const unsigned char *sha1))
{
	return do_for_each_ref("refs/heads", fn, 11);
}

int for_each_remote_ref(int (*fn)(const char *path, const unsigned char *sha1))
{
	return do_for_each_ref("refs/remotes", fn, 13);
}

int get_ref_sha1(const char *ref, unsigned char *sha1)
{
	if (check_ref_format(ref))
		return -1;
	return read_ref(git_path("refs/%s", ref), sha1);
}

/*
 * Make sure "ref" is something reasonable to have under ".git/refs/";
 * We do not like it if:
 *
 * - any path component of it begins with ".", or
 * - it has double dots "..", or
 * - it has ASCII control character, "~", "^", ":" or SP, anywhere, or
 * - it ends with a "/".
 */

static inline int bad_ref_char(int ch)
{
	return (((unsigned) ch) <= ' ' ||
		ch == '~' || ch == '^' || ch == ':' ||
		/* 2.13 Pattern Matching Notation */
		ch == '?' || ch == '*' || ch == '[');
}

int check_ref_format(const char *ref)
{
	int ch, level;
	const char *cp = ref;

	level = 0;
	while (1) {
		while ((ch = *cp++) == '/')
			; /* tolerate duplicated slashes */
		if (!ch)
			return -1; /* should not end with slashes */

		/* we are at the beginning of the path component */
		if (ch == '.' || bad_ref_char(ch))
			return -1;

		/* scan the rest of the path component */
		while ((ch = *cp++) != 0) {
			if (bad_ref_char(ch))
				return -1;
			if (ch == '/')
				break;
			if (ch == '.' && *cp == '.')
				return -1;
		}
		level++;
		if (!ch) {
			if (level < 2)
				return -1; /* at least of form "heads/blah" */
			return 0;
		}
	}
}

static struct ref_lock* verify_lock(struct ref_lock *lock,
	const unsigned char *old_sha1, int mustexist)
{
	char buf[40];
	int nr, fd = open(lock->ref_file, O_RDONLY);
	if (fd < 0 && (mustexist || errno != ENOENT)) {
		error("Can't verify ref %s", lock->ref_file);
		unlock_ref(lock);
		return NULL;
	}
	nr = read(fd, buf, 40);
	close(fd);
	if (nr != 40 || get_sha1_hex(buf, lock->old_sha1) < 0) {
		error("Can't verify ref %s", lock->ref_file);
		unlock_ref(lock);
		return NULL;
	}
	if (memcmp(lock->old_sha1, old_sha1, 20)) {
		error("Ref %s is at %s but expected %s", lock->ref_file,
			sha1_to_hex(lock->old_sha1), sha1_to_hex(old_sha1));
		unlock_ref(lock);
		return NULL;
	}
	return lock;
}

static struct ref_lock* lock_ref_sha1_basic(const char *path,
	int plen,
	const unsigned char *old_sha1, int mustexist)
{
	struct ref_lock *lock;

	lock = xcalloc(1, sizeof(struct ref_lock));
	lock->lock_fd = -1;

	plen = strlen(path) - plen;
	path = resolve_ref(path, lock->old_sha1, mustexist);
	if (!path) {
		error("Can't read ref %s", path);
		unlock_ref(lock);
		return NULL;
	}

	lock->ref_file = strdup(path);
	lock->lock_file = strdup(mkpath("%s.lock", lock->ref_file));

	if (safe_create_leading_directories(lock->lock_file))
		die("unable to create directory for %s", lock->lock_file);
	lock->lock_fd = open(lock->lock_file,
		O_WRONLY | O_CREAT | O_EXCL, 0666);
	if (lock->lock_fd < 0) {
		error("Couldn't open lock file %s: %s",
			lock->lock_file, strerror(errno));
		unlock_ref(lock);
		return NULL;
	}

	return old_sha1 ? verify_lock(lock, old_sha1, mustexist) : lock;
}

struct ref_lock* lock_ref_sha1(const char *ref,
	const unsigned char *old_sha1, int mustexist)
{
	if (check_ref_format(ref))
		return NULL;
	return lock_ref_sha1_basic(git_path("refs/%s", ref),
		strlen(ref), old_sha1, mustexist);
}

struct ref_lock* lock_any_ref_for_update(const char *ref,
	const unsigned char *old_sha1, int mustexist)
{
	return lock_ref_sha1_basic(git_path("%s", ref),
		strlen(ref), old_sha1, mustexist);
}

void unlock_ref (struct ref_lock *lock)
{
	if (lock->lock_fd >= 0) {
		close(lock->lock_fd);
		unlink(lock->lock_file);
	}
	if (lock->ref_file)
		free(lock->ref_file);
	if (lock->lock_file)
		free(lock->lock_file);
	free(lock);
}

int write_ref_sha1(struct ref_lock *lock,
	const unsigned char *sha1, const char *logmsg)
{
	static char term = '\n';

	if (!lock)
		return -1;
	if (!memcmp(lock->old_sha1, sha1, 20)) {
		unlock_ref(lock);
		return 0;
	}
	if (write(lock->lock_fd, sha1_to_hex(sha1), 40) != 40 ||
	    write(lock->lock_fd, &term, 1) != 1
		|| close(lock->lock_fd) < 0) {
		error("Couldn't write %s", lock->lock_file);
		unlock_ref(lock);
		return -1;
	}
	if (rename(lock->lock_file, lock->ref_file) < 0) {
		error("Couldn't set %s", lock->ref_file);
		unlock_ref(lock);
		return -1;
	}
	lock->lock_fd = -1;
	unlock_ref(lock);
	return 0;
}
Commit	Line	Data
95fc7512 DB	1	#include "refs.h"
	2	#include "cache.h"
	3
	4	#include <errno.h>
	5
ca8db142 LT	6	/* We allow "recursive" symbolic refs. Only within reason, though */
	7	#define MAXDEPTH 5
	8
a876ed83	9	const char resolve_ref(const char path, unsigned char *sha1, int reading)
8a65ff76	10	{
a876ed83 JH	11	int depth = MAXDEPTH, len;
a876ed83 JH	12	char buffer[256];
ca8db142	13
a876ed83 JH	14	for (;;) {
	15	struct stat st;
	16	char *buf;
	17	int fd;
8a65ff76	18
a876ed83 JH	19	if (--depth < 0)
a876ed83 JH	20	return NULL;
ca8db142	21
a876ed83 JH	22	/* Special case: non-existing file.
	23	* Not having the refs/heads/new-branch is OK
	24	* if we are writing into it, so is .git/HEAD
	25	* that points at refs/heads/master still to be
	26	* born. It is NOT OK if we are resolving for
	27	* reading.
	28	*/
	29	if (lstat(path, &st) < 0) {
	30	if (reading \|\| errno != ENOENT)
	31	return NULL;
	32	memset(sha1, 0, 20);
	33	return path;
	34	}
ca8db142	35
a876ed83 JH	36	/* Follow "normalized" - ie "refs/.." symlinks by hand */
	37	if (S_ISLNK(st.st_mode)) {
	38	len = readlink(path, buffer, sizeof(buffer)-1);
	39	if (len >= 5 && !memcmp("refs/", buffer, 5)) {
	40	path = git_path("%.*s", len, buffer);
	41	continue;
	42	}
ca8db142	43	}
a876ed83 JH	44
	45	/*
	46	* Anything else, just open it and try to use it as
	47	* a ref
	48	*/
	49	fd = open(path, O_RDONLY);
	50	if (fd < 0)
	51	return NULL;
	52	len = read(fd, buffer, sizeof(buffer)-1);
	53	close(fd);
	54
	55	/*
	56	* Is it a symbolic ref?
	57	*/
	58	if (len < 4 \|\| memcmp("ref:", buffer, 4))
	59	break;
	60	buf = buffer + 4;
	61	len -= 4;
	62	while (len && isspace(*buf))
	63	buf++, len--;
	64	while (len && isspace(buf[len-1]))
	65	buf[--len] = 0;
	66	path = git_path("%.*s", len, buf);
8a65ff76	67	}
a876ed83 JH	68	if (len < 40 \|\| get_sha1_hex(buffer, sha1))
	69	return NULL;
	70	return path;
	71	}
	72
8098a178 JH	73	int create_symref(const char git_HEAD, const char refs_heads_master)
8098a178 JH	74	{
8098a178 JH	75	const char *lockpath;
	76	char ref[1000];
	77	int fd, len, written;
	78
9f0bb90d JH	79	#ifndef NO_SYMLINK_HEAD
9f0bb90d JH	80	if (prefer_symlink_refs) {
f8348be3 JS	81	unlink(git_HEAD);
	82	if (!symlink(refs_heads_master, git_HEAD))
	83	return 0;
	84	fprintf(stderr, "no symlink - falling back to symbolic ref\n");
	85	}
303958dc JS	86	#endif
303958dc JS	87
8098a178 JH	88	len = snprintf(ref, sizeof(ref), "ref: %s\n", refs_heads_master);
	89	if (sizeof(ref) <= len) {
	90	error("refname too long: %s", refs_heads_master);
	91	return -1;
	92	}
	93	lockpath = mkpath("%s.lock", git_HEAD);
	94	fd = open(lockpath, O_CREAT \| O_EXCL \| O_WRONLY, 0666);
	95	written = write(fd, ref, len);
	96	close(fd);
	97	if (written != len) {
	98	unlink(lockpath);
	99	error("Unable to write to %s", lockpath);
	100	return -2;
	101	}
	102	if (rename(lockpath, git_HEAD) < 0) {
	103	unlink(lockpath);
	104	error("Unable to create %s", git_HEAD);
	105	return -3;
	106	}
	107	return 0;
8098a178 JH	108	}
8098a178 JH	109
a876ed83 JH	110	int read_ref(const char filename, unsigned char sha1)
	111	{
	112	if (resolve_ref(filename, sha1, 1))
	113	return 0;
	114	return -1;
8a65ff76 LT	115	}
8a65ff76 LT	116
a62be77f	117	static int do_for_each_ref(const char base, int (fn)(const char path, const unsigned char sha1), int trim)
8a65ff76 LT	118	{
8a65ff76 LT	119	int retval = 0;
4ec99bf0	120	DIR *dir = opendir(git_path("%s", base));
8a65ff76 LT	121
	122	if (dir) {
	123	struct dirent *de;
	124	int baselen = strlen(base);
	125	char *path = xmalloc(baselen + 257);
6cada6a9 LT	126
	127	if (!strncmp(base, "./", 2)) {
	128	base += 2;
	129	baselen -= 2;
	130	}
8a65ff76	131	memcpy(path, base, baselen);
944d8589 LT	132	if (baselen && base[baselen-1] != '/')
944d8589 LT	133	path[baselen++] = '/';
8a65ff76 LT	134
	135	while ((de = readdir(dir)) != NULL) {
	136	unsigned char sha1[20];
	137	struct stat st;
	138	int namelen;
	139
	140	if (de->d_name[0] == '.')
	141	continue;
	142	namelen = strlen(de->d_name);
	143	if (namelen > 255)
	144	continue;
	145	memcpy(path + baselen, de->d_name, namelen+1);
a7e66ae3	146	if (stat(git_path("%s", path), &st) < 0)
8a65ff76 LT	147	continue;
8a65ff76 LT	148	if (S_ISDIR(st.st_mode)) {
a62be77f	149	retval = do_for_each_ref(path, fn, trim);
8a65ff76 LT	150	if (retval)
	151	break;
	152	continue;
	153	}
c401cb48	154	if (read_ref(git_path("%s", path), sha1) < 0) {
f61c2c97	155	error("%s points nowhere!", path);
8a65ff76	156	continue;
c401cb48 JS	157	}
c401cb48 JS	158	if (!has_sha1_file(sha1)) {
f61c2c97 JH	159	error("%s does not point to a valid "
f61c2c97 JH	160	"commit object!", path);
8a65ff76	161	continue;
c401cb48	162	}
a62be77f	163	retval = fn(path + trim, sha1);
8a65ff76 LT	164	if (retval)
	165	break;
	166	}
	167	free(path);
	168	closedir(dir);
	169	}
	170	return retval;
	171	}
	172
723c31fe LT	173	int head_ref(int (fn)(const char path, const unsigned char *sha1))
	174	{
	175	unsigned char sha1[20];
ca8db142	176	if (!read_ref(git_path("HEAD"), sha1))
99a0a6e0	177	return fn("HEAD", sha1);
2f34ba32	178	return 0;
723c31fe LT	179	}
723c31fe LT	180
944d8589	181	int for_each_ref(int (fn)(const char path, const unsigned char *sha1))
8a65ff76	182	{
a62be77f SE	183	return do_for_each_ref("refs", fn, 0);
	184	}
	185
	186	int for_each_tag_ref(int (fn)(const char path, const unsigned char *sha1))
	187	{
	188	return do_for_each_ref("refs/tags", fn, 10);
	189	}
	190
	191	int for_each_branch_ref(int (fn)(const char path, const unsigned char *sha1))
	192	{
	193	return do_for_each_ref("refs/heads", fn, 11);
	194	}
	195
	196	int for_each_remote_ref(int (fn)(const char path, const unsigned char *sha1))
	197	{
	198	return do_for_each_ref("refs/remotes", fn, 13);
8a65ff76 LT	199	}
8a65ff76 LT	200
95fc7512 DB	201	int get_ref_sha1(const char ref, unsigned char sha1)
95fc7512 DB	202	{
95fc7512 DB	203	if (check_ref_format(ref))
95fc7512 DB	204	return -1;
70e1a880	205	return read_ref(git_path("refs/%s", ref), sha1);
95fc7512 DB	206	}
95fc7512 DB	207
03feddd6 JH	208	/*
	209	* Make sure "ref" is something reasonable to have under ".git/refs/";
	210	* We do not like it if:
	211	*
	212	* - any path component of it begins with ".", or
	213	* - it has double dots "..", or
	214	* - it has ASCII control character, "~", "^", ":" or SP, anywhere, or
	215	* - it ends with a "/".
	216	*/
	217
	218	static inline int bad_ref_char(int ch)
	219	{
	220	return (((unsigned) ch) <= ' ' \|\|
68283999 JH	221	ch == '~' \|\| ch == '^' \|\| ch == ':' \|\|
	222	/* 2.13 Pattern Matching Notation */
	223	ch == '?' \|\| ch == '*' \|\| ch == '[');
03feddd6 JH	224	}
03feddd6 JH	225
95fc7512 DB	226	int check_ref_format(const char *ref)
95fc7512 DB	227	{
03feddd6 JH	228	int ch, level;
	229	const char *cp = ref;
	230
	231	level = 0;
	232	while (1) {
	233	while ((ch = *cp++) == '/')
	234	; /* tolerate duplicated slashes */
	235	if (!ch)
	236	return -1; /* should not end with slashes */
	237
	238	/* we are at the beginning of the path component */
	239	if (ch == '.' \|\| bad_ref_char(ch))
	240	return -1;
	241
	242	/* scan the rest of the path component */
	243	while ((ch = *cp++) != 0) {
	244	if (bad_ref_char(ch))
	245	return -1;
	246	if (ch == '/')
	247	break;
	248	if (ch == '.' && *cp == '.')
	249	return -1;
	250	}
	251	level++;
	252	if (!ch) {
	253	if (level < 2)
	254	return -1; /* at least of form "heads/blah" */
	255	return 0;
	256	}
	257	}
95fc7512 DB	258	}
95fc7512 DB	259
4bd18c43 SP	260	static struct ref_lock* verify_lock(struct ref_lock *lock,
	261	const unsigned char *old_sha1, int mustexist)
	262	{
	263	char buf[40];
	264	int nr, fd = open(lock->ref_file, O_RDONLY);
	265	if (fd < 0 && (mustexist \|\| errno != ENOENT)) {
	266	error("Can't verify ref %s", lock->ref_file);
	267	unlock_ref(lock);
	268	return NULL;
	269	}
	270	nr = read(fd, buf, 40);
	271	close(fd);
	272	if (nr != 40 \|\| get_sha1_hex(buf, lock->old_sha1) < 0) {
	273	error("Can't verify ref %s", lock->ref_file);
	274	unlock_ref(lock);
	275	return NULL;
	276	}
	277	if (memcmp(lock->old_sha1, old_sha1, 20)) {
	278	error("Ref %s is at %s but expected %s", lock->ref_file,
	279	sha1_to_hex(lock->old_sha1), sha1_to_hex(old_sha1));
	280	unlock_ref(lock);
	281	return NULL;
	282	}
	283	return lock;
	284	}
	285
	286	static struct ref_lock* lock_ref_sha1_basic(const char *path,
	287	int plen,
	288	const unsigned char *old_sha1, int mustexist)
	289	{
	290	struct ref_lock *lock;
	291
	292	lock = xcalloc(1, sizeof(struct ref_lock));
	293	lock->lock_fd = -1;
	294
	295	plen = strlen(path) - plen;
	296	path = resolve_ref(path, lock->old_sha1, mustexist);
	297	if (!path) {
	298	error("Can't read ref %s", path);
	299	unlock_ref(lock);
	300	return NULL;
	301	}
	302
	303	lock->ref_file = strdup(path);
	304	lock->lock_file = strdup(mkpath("%s.lock", lock->ref_file));
	305
	306	if (safe_create_leading_directories(lock->lock_file))
	307	die("unable to create directory for %s", lock->lock_file);
	308	lock->lock_fd = open(lock->lock_file,
	309	O_WRONLY \| O_CREAT \| O_EXCL, 0666);
	310	if (lock->lock_fd < 0) {
	311	error("Couldn't open lock file %s: %s",
	312	lock->lock_file, strerror(errno));
	313	unlock_ref(lock);
	314	return NULL;
	315	}
	316
	317	return old_sha1 ? verify_lock(lock, old_sha1, mustexist) : lock;
	318	}
	319
	320	struct ref_lock* lock_ref_sha1(const char *ref,
	321	const unsigned char *old_sha1, int mustexist)
95fc7512	322	{
95fc7512	323	if (check_ref_format(ref))
4bd18c43 SP	324	return NULL;
	325	return lock_ref_sha1_basic(git_path("refs/%s", ref),
	326	strlen(ref), old_sha1, mustexist);
	327	}
	328
	329	struct ref_lock* lock_any_ref_for_update(const char *ref,
	330	const unsigned char *old_sha1, int mustexist)
	331	{
	332	return lock_ref_sha1_basic(git_path("%s", ref),
	333	strlen(ref), old_sha1, mustexist);
	334	}
	335
	336	void unlock_ref (struct ref_lock *lock)
	337	{
	338	if (lock->lock_fd >= 0) {
	339	close(lock->lock_fd);
	340	unlink(lock->lock_file);
	341	}
	342	if (lock->ref_file)
	343	free(lock->ref_file);
	344	if (lock->lock_file)
	345	free(lock->lock_file);
	346	free(lock);
	347	}
	348
	349	int write_ref_sha1(struct ref_lock *lock,
	350	const unsigned char sha1, const char logmsg)
	351	{
	352	static char term = '\n';
	353
	354	if (!lock)
95fc7512	355	return -1;
4bd18c43 SP	356	if (!memcmp(lock->old_sha1, sha1, 20)) {
	357	unlock_ref(lock);
	358	return 0;
95fc7512	359	}
4bd18c43 SP	360	if (write(lock->lock_fd, sha1_to_hex(sha1), 40) != 40 \|\|
	361	write(lock->lock_fd, &term, 1) != 1
	362	\|\| close(lock->lock_fd) < 0) {
	363	error("Couldn't write %s", lock->lock_file);
	364	unlock_ref(lock);
	365	return -1;
	366	}
	367	if (rename(lock->lock_file, lock->ref_file) < 0) {
	368	error("Couldn't set %s", lock->ref_file);
	369	unlock_ref(lock);
	370	return -1;
	371	}
	372	lock->lock_fd = -1;
	373	unlock_ref(lock);
	374	return 0;
95fc7512	375	}