[thirdparty/git.git] / wrapper.c

/*
 * Various trivial helper wrappers around standard functions
 */
#include "cache.h"

static void do_nothing(size_t size)
{
}

static void (*try_to_free_routine)(size_t size) = do_nothing;

static void memory_limit_check(size_t size)
{
	static int limit = -1;
	if (limit == -1) {
		const char *env = getenv("GIT_ALLOC_LIMIT");
		limit = env ? atoi(env) * 1024 : 0;
	}
	if (limit && size > limit)
		die("attempting to allocate %"PRIuMAX" over limit %d",
		    (intmax_t)size, limit);
}

try_to_free_t set_try_to_free_routine(try_to_free_t routine)
{
	try_to_free_t old = try_to_free_routine;
	if (!routine)
		routine = do_nothing;
	try_to_free_routine = routine;
	return old;
}

char *xstrdup(const char *str)
{
	char *ret = strdup(str);
	if (!ret) {
		try_to_free_routine(strlen(str) + 1);
		ret = strdup(str);
		if (!ret)
			die("Out of memory, strdup failed");
	}
	return ret;
}

void *xmalloc(size_t size)
{
	void *ret;

	memory_limit_check(size);
	ret = malloc(size);
	if (!ret && !size)
		ret = malloc(1);
	if (!ret) {
		try_to_free_routine(size);
		ret = malloc(size);
		if (!ret && !size)
			ret = malloc(1);
		if (!ret)
			die("Out of memory, malloc failed (tried to allocate %lu bytes)",
			    (unsigned long)size);
	}
#ifdef XMALLOC_POISON
	memset(ret, 0xA5, size);
#endif
	return ret;
}

void *xmallocz(size_t size)
{
	void *ret;
	if (unsigned_add_overflows(size, 1))
		die("Data too large to fit into virtual memory space.");
	ret = xmalloc(size + 1);
	((char*)ret)[size] = 0;
	return ret;
}

/*
 * xmemdupz() allocates (len + 1) bytes of memory, duplicates "len" bytes of
 * "data" to the allocated memory, zero terminates the allocated memory,
 * and returns a pointer to the allocated memory. If the allocation fails,
 * the program dies.
 */
void *xmemdupz(const void *data, size_t len)
{
	return memcpy(xmallocz(len), data, len);
}

char *xstrndup(const char *str, size_t len)
{
	char *p = memchr(str, '\0', len);
	return xmemdupz(str, p ? p - str : len);
}

void *xrealloc(void *ptr, size_t size)
{
	void *ret;

	memory_limit_check(size);
	ret = realloc(ptr, size);
	if (!ret && !size)
		ret = realloc(ptr, 1);
	if (!ret) {
		try_to_free_routine(size);
		ret = realloc(ptr, size);
		if (!ret && !size)
			ret = realloc(ptr, 1);
		if (!ret)
			die("Out of memory, realloc failed");
	}
	return ret;
}

void *xcalloc(size_t nmemb, size_t size)
{
	void *ret;

	memory_limit_check(size * nmemb);
	ret = calloc(nmemb, size);
	if (!ret && (!nmemb || !size))
		ret = calloc(1, 1);
	if (!ret) {
		try_to_free_routine(nmemb * size);
		ret = calloc(nmemb, size);
		if (!ret && (!nmemb || !size))
			ret = calloc(1, 1);
		if (!ret)
			die("Out of memory, calloc failed");
	}
	return ret;
}

/*
 * xread() is the same a read(), but it automatically restarts read()
 * operations with a recoverable error (EAGAIN and EINTR). xread()
 * DOES NOT GUARANTEE that "len" bytes is read even if the data is available.
 */
ssize_t xread(int fd, void *buf, size_t len)
{
	ssize_t nr;
	while (1) {
		nr = read(fd, buf, len);
		if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
			continue;
		return nr;
	}
}

/*
 * xwrite() is the same a write(), but it automatically restarts write()
 * operations with a recoverable error (EAGAIN and EINTR). xwrite() DOES NOT
 * GUARANTEE that "len" bytes is written even if the operation is successful.
 */
ssize_t xwrite(int fd, const void *buf, size_t len)
{
	ssize_t nr;
	while (1) {
		nr = write(fd, buf, len);
		if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
			continue;
		return nr;
	}
}

ssize_t read_in_full(int fd, void *buf, size_t count)
{
	char *p = buf;
	ssize_t total = 0;

	while (count > 0) {
		ssize_t loaded = xread(fd, p, count);
		if (loaded < 0)
			return -1;
		if (loaded == 0)
			return total;
		count -= loaded;
		p += loaded;
		total += loaded;
	}

	return total;
}

ssize_t write_in_full(int fd, const void *buf, size_t count)
{
	const char *p = buf;
	ssize_t total = 0;

	while (count > 0) {
		ssize_t written = xwrite(fd, p, count);
		if (written < 0)
			return -1;
		if (!written) {
			errno = ENOSPC;
			return -1;
		}
		count -= written;
		p += written;
		total += written;
	}

	return total;
}

int xdup(int fd)
{
	int ret = dup(fd);
	if (ret < 0)
		die_errno("dup failed");
	return ret;
}

FILE *xfdopen(int fd, const char *mode)
{
	FILE *stream = fdopen(fd, mode);
	if (stream == NULL)
		die_errno("Out of memory? fdopen failed");
	return stream;
}

int xmkstemp(char *template)
{
	int fd;
	char origtemplate[PATH_MAX];
	strlcpy(origtemplate, template, sizeof(origtemplate));

	fd = mkstemp(template);
	if (fd < 0) {
		int saved_errno = errno;
		const char *nonrelative_template;

		if (!template[0])
			template = origtemplate;

		nonrelative_template = absolute_path(template);
		errno = saved_errno;
		die_errno("Unable to create temporary file '%s'",
			nonrelative_template);
	}
	return fd;
}

/* git_mkstemp() - create tmp file honoring TMPDIR variable */
int git_mkstemp(char *path, size_t len, const char *template)
{
	const char *tmp;
	size_t n;

	tmp = getenv("TMPDIR");
	if (!tmp)
		tmp = "/tmp";
	n = snprintf(path, len, "%s/%s", tmp, template);
	if (len <= n) {
		errno = ENAMETOOLONG;
		return -1;
	}
	return mkstemp(path);
}

/* git_mkstemps() - create tmp file with suffix honoring TMPDIR variable. */
int git_mkstemps(char *path, size_t len, const char *template, int suffix_len)
{
	const char *tmp;
	size_t n;

	tmp = getenv("TMPDIR");
	if (!tmp)
		tmp = "/tmp";
	n = snprintf(path, len, "%s/%s", tmp, template);
	if (len <= n) {
		errno = ENAMETOOLONG;
		return -1;
	}
	return mkstemps(path, suffix_len);
}

/* Adapted from libiberty's mkstemp.c. */

#undef TMP_MAX
#define TMP_MAX 16384

int git_mkstemps_mode(char *pattern, int suffix_len, int mode)
{
	static const char letters[] =
		"abcdefghijklmnopqrstuvwxyz"
		"ABCDEFGHIJKLMNOPQRSTUVWXYZ"
		"0123456789";
	static const int num_letters = 62;
	uint64_t value;
	struct timeval tv;
	char *template;
	size_t len;
	int fd, count;

	len = strlen(pattern);

	if (len < 6 + suffix_len) {
		errno = EINVAL;
		return -1;
	}

	if (strncmp(&pattern[len - 6 - suffix_len], "XXXXXX", 6)) {
		errno = EINVAL;
		return -1;
	}

	/*
	 * Replace pattern's XXXXXX characters with randomness.
	 * Try TMP_MAX different filenames.
	 */
	gettimeofday(&tv, NULL);
	value = ((size_t)(tv.tv_usec << 16)) ^ tv.tv_sec ^ getpid();
	template = &pattern[len - 6 - suffix_len];
	for (count = 0; count < TMP_MAX; ++count) {
		uint64_t v = value;
		/* Fill in the random bits. */
		template[0] = letters[v % num_letters]; v /= num_letters;
		template[1] = letters[v % num_letters]; v /= num_letters;
		template[2] = letters[v % num_letters]; v /= num_letters;
		template[3] = letters[v % num_letters]; v /= num_letters;
		template[4] = letters[v % num_letters]; v /= num_letters;
		template[5] = letters[v % num_letters]; v /= num_letters;

		fd = open(pattern, O_CREAT | O_EXCL | O_RDWR, mode);
		if (fd > 0)
			return fd;
		/*
		 * Fatal error (EPERM, ENOSPC etc).
		 * It doesn't make sense to loop.
		 */
		if (errno != EEXIST)
			break;
		/*
		 * This is a random value.  It is only necessary that
		 * the next TMP_MAX values generated by adding 7777 to
		 * VALUE are different with (module 2^32).
		 */
		value += 7777;
	}
	/* We return the null string if we can't find a unique file name.  */
	pattern[0] = '\0';
	return -1;
}

int git_mkstemp_mode(char *pattern, int mode)
{
	/* mkstemp is just mkstemps with no suffix */
	return git_mkstemps_mode(pattern, 0, mode);
}

int gitmkstemps(char *pattern, int suffix_len)
{
	return git_mkstemps_mode(pattern, suffix_len, 0600);
}

int xmkstemp_mode(char *template, int mode)
{
	int fd;
	char origtemplate[PATH_MAX];
	strlcpy(origtemplate, template, sizeof(origtemplate));

	fd = git_mkstemp_mode(template, mode);
	if (fd < 0) {
		int saved_errno = errno;
		const char *nonrelative_template;

		if (!template[0])
			template = origtemplate;

		nonrelative_template = absolute_path(template);
		errno = saved_errno;
		die_errno("Unable to create temporary file '%s'",
			nonrelative_template);
	}
	return fd;
}

static int warn_if_unremovable(const char *op, const char *file, int rc)
{
	if (rc < 0) {
		int err = errno;
		if (ENOENT != err) {
			warning("unable to %s %s: %s",
				op, file, strerror(errno));
			errno = err;
		}
	}
	return rc;
}

int unlink_or_warn(const char *file)
{
	return warn_if_unremovable("unlink", file, unlink(file));
}

int rmdir_or_warn(const char *file)
{
	return warn_if_unremovable("rmdir", file, rmdir(file));
}

int remove_or_warn(unsigned int mode, const char *file)
{
	return S_ISGITLINK(mode) ? rmdir_or_warn(file) : unlink_or_warn(file);
}

struct passwd *xgetpwuid_self(void)
{
	struct passwd *pw;

	errno = 0;
	pw = getpwuid(getuid());
	if (!pw)
		die(_("unable to look up current user in the passwd file: %s"),
		    errno ? strerror(errno) : _("no such user"));
	return pw;
}
Commit	Line	Data
112db553 LT	1	/*
	2	* Various trivial helper wrappers around standard functions
	3	*/
	4	#include "cache.h"
	5
e0500293	6	static void do_nothing(size_t size)
a9a74636	7	{
a9a74636 NP	8	}
a9a74636 NP	9
e0500293	10	static void (*try_to_free_routine)(size_t size) = do_nothing;
a9a74636	11
d41489a6 NTND	12	static void memory_limit_check(size_t size)
	13	{
	14	static int limit = -1;
	15	if (limit == -1) {
	16	const char *env = getenv("GIT_ALLOC_LIMIT");
	17	limit = env ? atoi(env) * 1024 : 0;
	18	}
	19	if (limit && size > limit)
	20	die("attempting to allocate %"PRIuMAX" over limit %d",
	21	(intmax_t)size, limit);
	22	}
	23
851c34b0	24	try_to_free_t set_try_to_free_routine(try_to_free_t routine)
a9a74636	25	{
851c34b0	26	try_to_free_t old = try_to_free_routine;
00b0d7f7 JH	27	if (!routine)
00b0d7f7 JH	28	routine = do_nothing;
851c34b0 JS	29	try_to_free_routine = routine;
851c34b0 JS	30	return old;
a9a74636 NP	31	}
a9a74636 NP	32
112db553 LT	33	char xstrdup(const char str)
	34	{
	35	char *ret = strdup(str);
	36	if (!ret) {
a9a74636	37	try_to_free_routine(strlen(str) + 1);
112db553 LT	38	ret = strdup(str);
	39	if (!ret)
	40	die("Out of memory, strdup failed");
	41	}
	42	return ret;
	43	}
	44
	45	void *xmalloc(size_t size)
	46	{
d41489a6 NTND	47	void *ret;
	48
	49	memory_limit_check(size);
	50	ret = malloc(size);
112db553 LT	51	if (!ret && !size)
	52	ret = malloc(1);
	53	if (!ret) {
a9a74636	54	try_to_free_routine(size);
112db553 LT	55	ret = malloc(size);
	56	if (!ret && !size)
	57	ret = malloc(1);
	58	if (!ret)
8bd9fd50 MM	59	die("Out of memory, malloc failed (tried to allocate %lu bytes)",
8bd9fd50 MM	60	(unsigned long)size);
112db553 LT	61	}
	62	#ifdef XMALLOC_POISON
	63	memset(ret, 0xA5, size);
	64	#endif
	65	return ret;
	66	}
	67
5bf9219d IL	68	void *xmallocz(size_t size)
	69	{
	70	void *ret;
1368f650	71	if (unsigned_add_overflows(size, 1))
5bf9219d IL	72	die("Data too large to fit into virtual memory space.");
	73	ret = xmalloc(size + 1);
	74	((char*)ret)[size] = 0;
	75	return ret;
	76	}
	77
112db553 LT	78	/*
	79	* xmemdupz() allocates (len + 1) bytes of memory, duplicates "len" bytes of
	80	* "data" to the allocated memory, zero terminates the allocated memory,
	81	* and returns a pointer to the allocated memory. If the allocation fails,
	82	* the program dies.
	83	*/
	84	void xmemdupz(const void data, size_t len)
	85	{
5bf9219d	86	return memcpy(xmallocz(len), data, len);
112db553 LT	87	}
	88
	89	char xstrndup(const char str, size_t len)
	90	{
	91	char *p = memchr(str, '\0', len);
	92	return xmemdupz(str, p ? p - str : len);
	93	}
	94
	95	void xrealloc(void ptr, size_t size)
	96	{
d41489a6 NTND	97	void *ret;
	98
	99	memory_limit_check(size);
	100	ret = realloc(ptr, size);
112db553 LT	101	if (!ret && !size)
	102	ret = realloc(ptr, 1);
	103	if (!ret) {
a9a74636	104	try_to_free_routine(size);
112db553 LT	105	ret = realloc(ptr, size);
	106	if (!ret && !size)
	107	ret = realloc(ptr, 1);
	108	if (!ret)
	109	die("Out of memory, realloc failed");
	110	}
	111	return ret;
	112	}
	113
	114	void *xcalloc(size_t nmemb, size_t size)
	115	{
d41489a6 NTND	116	void *ret;
	117
	118	memory_limit_check(size * nmemb);
	119	ret = calloc(nmemb, size);
112db553 LT	120	if (!ret && (!nmemb \|\| !size))
	121	ret = calloc(1, 1);
	122	if (!ret) {
a9a74636	123	try_to_free_routine(nmemb * size);
112db553 LT	124	ret = calloc(nmemb, size);
	125	if (!ret && (!nmemb \|\| !size))
	126	ret = calloc(1, 1);
	127	if (!ret)
	128	die("Out of memory, calloc failed");
	129	}
	130	return ret;
	131	}
	132
112db553 LT	133	/*
	134	* xread() is the same a read(), but it automatically restarts read()
	135	* operations with a recoverable error (EAGAIN and EINTR). xread()
	136	* DOES NOT GUARANTEE that "len" bytes is read even if the data is available.
	137	*/
	138	ssize_t xread(int fd, void *buf, size_t len)
	139	{
	140	ssize_t nr;
	141	while (1) {
	142	nr = read(fd, buf, len);
	143	if ((nr < 0) && (errno == EAGAIN \|\| errno == EINTR))
	144	continue;
	145	return nr;
	146	}
	147	}
	148
	149	/*
	150	* xwrite() is the same a write(), but it automatically restarts write()
	151	* operations with a recoverable error (EAGAIN and EINTR). xwrite() DOES NOT
	152	* GUARANTEE that "len" bytes is written even if the operation is successful.
	153	*/
	154	ssize_t xwrite(int fd, const void *buf, size_t len)
	155	{
	156	ssize_t nr;
	157	while (1) {
	158	nr = write(fd, buf, len);
	159	if ((nr < 0) && (errno == EAGAIN \|\| errno == EINTR))
	160	continue;
	161	return nr;
	162	}
	163	}
	164
559e840b JH	165	ssize_t read_in_full(int fd, void *buf, size_t count)
	166	{
	167	char *p = buf;
	168	ssize_t total = 0;
	169
	170	while (count > 0) {
	171	ssize_t loaded = xread(fd, p, count);
56d7c27a JK	172	if (loaded < 0)
	173	return -1;
	174	if (loaded == 0)
	175	return total;
559e840b JH	176	count -= loaded;
	177	p += loaded;
	178	total += loaded;
	179	}
	180
	181	return total;
	182	}
	183
	184	ssize_t write_in_full(int fd, const void *buf, size_t count)
	185	{
	186	const char *p = buf;
	187	ssize_t total = 0;
	188
	189	while (count > 0) {
	190	ssize_t written = xwrite(fd, p, count);
	191	if (written < 0)
	192	return -1;
	193	if (!written) {
	194	errno = ENOSPC;
	195	return -1;
	196	}
	197	count -= written;
	198	p += written;
	199	total += written;
	200	}
	201
	202	return total;
	203	}
	204
112db553 LT	205	int xdup(int fd)
	206	{
	207	int ret = dup(fd);
	208	if (ret < 0)
d824cbba	209	die_errno("dup failed");
112db553 LT	210	return ret;
	211	}
	212
	213	FILE xfdopen(int fd, const char mode)
	214	{
	215	FILE *stream = fdopen(fd, mode);
	216	if (stream == NULL)
d824cbba	217	die_errno("Out of memory? fdopen failed");
112db553 LT	218	return stream;
	219	}
	220
	221	int xmkstemp(char *template)
	222	{
	223	int fd;
6cf6bb3e AE	224	char origtemplate[PATH_MAX];
6cf6bb3e AE	225	strlcpy(origtemplate, template, sizeof(origtemplate));
112db553 LT	226
112db553 LT	227	fd = mkstemp(template);
6cf6bb3e AE	228	if (fd < 0) {
	229	int saved_errno = errno;
	230	const char *nonrelative_template;
	231
	232	if (!template[0])
	233	template = origtemplate;
	234
e2a57aac	235	nonrelative_template = absolute_path(template);
6cf6bb3e AE	236	errno = saved_errno;
	237	die_errno("Unable to create temporary file '%s'",
	238	nonrelative_template);
	239	}
112db553 LT	240	return fd;
112db553 LT	241	}
39c68542	242
33f23936 JN	243	/* git_mkstemp() - create tmp file honoring TMPDIR variable */
	244	int git_mkstemp(char path, size_t len, const char template)
	245	{
	246	const char *tmp;
	247	size_t n;
	248
	249	tmp = getenv("TMPDIR");
	250	if (!tmp)
	251	tmp = "/tmp";
	252	n = snprintf(path, len, "%s/%s", tmp, template);
	253	if (len <= n) {
	254	errno = ENAMETOOLONG;
	255	return -1;
	256	}
	257	return mkstemp(path);
	258	}
	259
	260	/* git_mkstemps() - create tmp file with suffix honoring TMPDIR variable. */
	261	int git_mkstemps(char path, size_t len, const char template, int suffix_len)
	262	{
	263	const char *tmp;
	264	size_t n;
	265
	266	tmp = getenv("TMPDIR");
	267	if (!tmp)
	268	tmp = "/tmp";
	269	n = snprintf(path, len, "%s/%s", tmp, template);
	270	if (len <= n) {
	271	errno = ENAMETOOLONG;
	272	return -1;
	273	}
	274	return mkstemps(path, suffix_len);
	275	}
	276
	277	/* Adapted from libiberty's mkstemp.c. */
	278
	279	#undef TMP_MAX
	280	#define TMP_MAX 16384
	281
	282	int git_mkstemps_mode(char *pattern, int suffix_len, int mode)
	283	{
	284	static const char letters[] =
	285	"abcdefghijklmnopqrstuvwxyz"
	286	"ABCDEFGHIJKLMNOPQRSTUVWXYZ"
	287	"0123456789";
	288	static const int num_letters = 62;
	289	uint64_t value;
	290	struct timeval tv;
	291	char *template;
	292	size_t len;
	293	int fd, count;
	294
	295	len = strlen(pattern);
	296
	297	if (len < 6 + suffix_len) {
	298	errno = EINVAL;
	299	return -1;
	300	}
	301
	302	if (strncmp(&pattern[len - 6 - suffix_len], "XXXXXX", 6)) {
	303	errno = EINVAL;
	304	return -1;
	305	}
	306
307	/*
308	* Replace pattern's XXXXXX characters with randomness.
309	* Try TMP_MAX different filenames.
310	*/
311	gettimeofday(&tv, NULL);
312	value = ((size_t)(tv.tv_usec << 16)) ^ tv.tv_sec ^ getpid();
313	template = &pattern[len - 6 - suffix_len];
314	for (count = 0; count < TMP_MAX; ++count) {
315	uint64_t v = value;
316	/* Fill in the random bits. */
317	template[0] = letters[v % num_letters]; v /= num_letters;
318	template[1] = letters[v % num_letters]; v /= num_letters;
319	template[2] = letters[v % num_letters]; v /= num_letters;
320	template[3] = letters[v % num_letters]; v /= num_letters;
321	template[4] = letters[v % num_letters]; v /= num_letters;
322	template[5] = letters[v % num_letters]; v /= num_letters;
323
324	fd = open(pattern, O_CREAT \| O_EXCL \| O_RDWR, mode);
325	if (fd > 0)
326	return fd;
327	/*
328	* Fatal error (EPERM, ENOSPC etc).
329	* It doesn't make sense to loop.
330	*/
331	if (errno != EEXIST)
332	break;
333	/*
334	* This is a random value. It is only necessary that
335	* the next TMP_MAX values generated by adding 7777 to
336	* VALUE are different with (module 2^32).
337	*/
338	value += 7777;
339	}
340	/* We return the null string if we can't find a unique file name. */
341	pattern[0] = '\0';
342	return -1;
343	}
344
345	int git_mkstemp_mode(char *pattern, int mode)
346	{
347	/* mkstemp is just mkstemps with no suffix */
348	return git_mkstemps_mode(pattern, 0, mode);
349	}
350
351	int gitmkstemps(char *pattern, int suffix_len)
352	{
353	return git_mkstemps_mode(pattern, suffix_len, 0600);
354	}
355
b862b61c MM	356	int xmkstemp_mode(char *template, int mode)
	357	{
	358	int fd;
6cf6bb3e AE	359	char origtemplate[PATH_MAX];
6cf6bb3e AE	360	strlcpy(origtemplate, template, sizeof(origtemplate));
b862b61c MM	361
b862b61c MM	362	fd = git_mkstemp_mode(template, mode);
6cf6bb3e AE	363	if (fd < 0) {
	364	int saved_errno = errno;
	365	const char *nonrelative_template;
	366
	367	if (!template[0])
	368	template = origtemplate;
	369
e2a57aac	370	nonrelative_template = absolute_path(template);
6cf6bb3e AE	371	errno = saved_errno;
	372	die_errno("Unable to create temporary file '%s'",
	373	nonrelative_template);
	374	}
b862b61c MM	375	return fd;
	376	}
	377
10e13ec8	378	static int warn_if_unremovable(const char op, const char file, int rc)
fc71db39	379	{
fc71db39 AR	380	if (rc < 0) {
	381	int err = errno;
	382	if (ENOENT != err) {
10e13ec8 PC	383	warning("unable to %s %s: %s",
10e13ec8 PC	384	op, file, strerror(errno));
fc71db39 AR	385	errno = err;
	386	}
	387	}
	388	return rc;
	389	}
	390
10e13ec8 PC	391	int unlink_or_warn(const char *file)
	392	{
	393	return warn_if_unremovable("unlink", file, unlink(file));
	394	}
d1723296 PC	395
	396	int rmdir_or_warn(const char *file)
	397	{
	398	return warn_if_unremovable("rmdir", file, rmdir(file));
	399	}
80d706af PC	400
	401	int remove_or_warn(unsigned int mode, const char *file)
	402	{
	403	return S_ISGITLINK(mode) ? rmdir_or_warn(file) : unlink_or_warn(file);
	404	}
2f705875 JK	405
	406	struct passwd *xgetpwuid_self(void)
	407	{
	408	struct passwd *pw;
	409
	410	errno = 0;
	411	pw = getpwuid(getuid());
	412	if (!pw)
	413	die(_("unable to look up current user in the passwd file: %s"),
	414	errno ? strerror(errno) : _("no such user"));
	415	return pw;
	416	}