Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libc/gen/getgrent.c	Lines:	0	216	0.0 %
Date:	2017-11-13	Branches:	0	182	0.0 %


/*	$OpenBSD: getgrent.c,v 1.46 2015/12/01 15:08:25 deraadt Exp $ */
/*
 * Copyright (c) 1989, 1993
 *	The Regents of the University of California.  All rights reserved.
 * Portions Copyright (c) 1994, Jason Downs. All Rights Reserved.
 *
 * 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.
 */

#include <sys/types.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <limits.h>
#include <unistd.h>
#include <grp.h>
#include <errno.h>
#ifdef YP
#include <rpc/rpc.h>
#include <rpcsvc/yp.h>
#include <rpcsvc/ypclnt.h>
#include "ypinternal.h"
#include "ypexclude.h"
#endif
#include "thread_private.h"

/* This global storage is locked for the non-rentrant functions */
_THREAD_PRIVATE_KEY(gr_storage);
static struct group_storage {
#define	MAXGRP		200
	char *members[MAXGRP];
#define	MAXLINELENGTH	1024
	char line[MAXLINELENGTH];
} gr_storage;
#define GETGR_R_SIZE_MAX	_GR_BUF_LEN

/* File pointers are locked with the 'gr' mutex */
_THREAD_PRIVATE_KEY(gr);
static FILE *_gr_fp;
static struct group _gr_group;
static int _gr_stayopen;
static int grscan(int, gid_t, const char *, struct group *, struct group_storage *,
	int *);
static int start_gr(void);
static void endgrent_basic(void);

static struct group *getgrnam_gs(const char *, struct group *,
	struct group_storage *);
static struct group *getgrgid_gs(gid_t, struct group *,
	struct group_storage *);

#ifdef YP
static struct _ypexclude *__ypexhead = NULL;
static int	__ypmode = 0;
static char	*__ypcurrent, *__ypdomain;
static int	__ypcurrentlen;
#endif

struct group *
_getgrent_yp(int *foundyp)
{
	struct group *p_gr = (struct group*)_THREAD_PRIVATE(gr, _gr_group, NULL);
	struct group_storage *gs = (struct group_storage *)_THREAD_PRIVATE(gr_storage,
	    gr_storage, NULL);

	_THREAD_PRIVATE_MUTEX_LOCK(gr);
	if ((!_gr_fp && !start_gr()) || !grscan(0, 0, NULL, p_gr, gs, foundyp))
		p_gr = NULL;
	_THREAD_PRIVATE_MUTEX_UNLOCK(gr);
	return (p_gr);
}

struct group *
getgrent(void)
{
	return (_getgrent_yp(NULL));
}

static struct group *
getgrnam_gs(const char *name, struct group *p_gr, struct group_storage *gs)
{
	int rval;

	_THREAD_PRIVATE_MUTEX_LOCK(gr);
	if (!start_gr())
		rval = 0;
	else {
		rval = grscan(1, 0, name, p_gr, gs, NULL);
		if (!_gr_stayopen)
			endgrent_basic();
	}
	_THREAD_PRIVATE_MUTEX_UNLOCK(gr);
	return(rval ? p_gr : NULL);
}

struct group *
getgrnam(const char *name)
{
	struct group *p_gr = (struct group*)_THREAD_PRIVATE(gr,_gr_group,NULL);
	struct group_storage *gs = (struct group_storage *)_THREAD_PRIVATE(gr_storage,
	    gr_storage, NULL);

	return getgrnam_gs(name, p_gr, gs);
}

int
getgrnam_r(const char *name, struct group *grp, char *buffer,
	size_t bufsize, struct group **result)
{
	int errnosave;
	int ret;

	if (bufsize < GETGR_R_SIZE_MAX)
		return ERANGE;
	errnosave = errno;
	errno = 0;
	*result = getgrnam_gs(name, grp, (struct group_storage *)buffer);
	if (*result == NULL)
		ret = errno;
	else
		ret = 0;
	errno = errnosave;
	return ret;
}

static struct group *
getgrgid_gs(gid_t gid, struct group *p_gr, struct group_storage *gs)
{
	int rval;

	_THREAD_PRIVATE_MUTEX_LOCK(gr);
	if (!start_gr())
		rval = 0;
	else {
		rval = grscan(1, gid, NULL, p_gr, gs, NULL);
		if (!_gr_stayopen)
			endgrent_basic();
	}
	_THREAD_PRIVATE_MUTEX_UNLOCK(gr);
	return(rval ? p_gr : NULL);
}

struct group *
getgrgid(gid_t gid)
{
	struct group *p_gr = (struct group*)_THREAD_PRIVATE(gr, _gr_group, NULL);
	struct group_storage *gs = (struct group_storage *)_THREAD_PRIVATE(gr_storage,
	    gr_storage, NULL);

	return getgrgid_gs(gid, p_gr, gs);
}

int
getgrgid_r(gid_t gid, struct group *grp, char *buffer, size_t bufsize,
	struct group **result)
{
	int errnosave;
	int ret;

	if (bufsize < GETGR_R_SIZE_MAX)
		return ERANGE;
	errnosave = errno;
	errno = 0;
	*result = getgrgid_gs(gid, grp, (struct group_storage *)buffer);
	if (*result == NULL)
		ret = errno;
	else
		ret = 0;
	errno = errnosave;
	return ret;
}
DEF_WEAK(getgrgid_r);

static int
start_gr(void)
{
	if (_gr_fp) {
		rewind(_gr_fp);
#ifdef YP
		__ypmode = 0;
		free(__ypcurrent);
		__ypcurrent = NULL;
		if (__ypexhead)
			__ypexclude_free(&__ypexhead);
		__ypexhead = NULL;
#endif
		return(1);
	}

#ifdef YP
	/*
	 * Hint to the kernel that a passwd database operation is happening.
	 */
	(void)access("/var/run/ypbind.lock", R_OK);
#endif

	return((_gr_fp = fopen(_PATH_GROUP, "re")) ? 1 : 0);
}

void
setgrent(void)
{
	int saved_errno;

	saved_errno = errno;
	setgroupent(0);
	errno = saved_errno;
}
DEF_WEAK(setgrent);

int
setgroupent(int stayopen)
{
	int retval;

	_THREAD_PRIVATE_MUTEX_LOCK(gr);
	if (!start_gr())
		retval = 0;
	else {
		_gr_stayopen = stayopen;
		retval = 1;
	}
	_THREAD_PRIVATE_MUTEX_UNLOCK(gr);
	return (retval);
}
DEF_WEAK(setgroupent);

static
void
endgrent_basic(void)
{
	int saved_errno;

	if (_gr_fp) {
		saved_errno = errno;
		fclose(_gr_fp);
		_gr_fp = NULL;
#ifdef YP
		__ypmode = 0;
		free(__ypcurrent);
		__ypcurrent = NULL;
		if (__ypexhead)
			__ypexclude_free(&__ypexhead);
		__ypexhead = NULL;
#endif
		errno = saved_errno;
	}
}

void
endgrent(void)
{
	_THREAD_PRIVATE_MUTEX_LOCK(gr);
	endgrent_basic();
	_THREAD_PRIVATE_MUTEX_UNLOCK(gr);
}
DEF_WEAK(endgrent);

static int
grscan(int search, gid_t gid, const char *name, struct group *p_gr,
    struct group_storage *gs, int *foundyp)
{
	char *cp, **m;
	char *bp, *endp;
	u_long ul;
#ifdef YP
	char *key, *data;
	int keylen, datalen;
	int r;
#endif
	char **members;
	char *line;
	int saved_errno;

	if (gs == NULL)
		return 0;
	members = gs->members;
	line = gs->line;
	saved_errno = errno;

	for (;;) {
#ifdef YP
		if (__ypmode) {
			if (__ypcurrent) {
				r = yp_next(__ypdomain, "group.byname",
				    __ypcurrent, __ypcurrentlen,
				    &key, &keylen, &data, &datalen);
				free(__ypcurrent);
				__ypcurrent = key;
				__ypcurrentlen = keylen;
			} else {
				r = yp_first(__ypdomain, "group.byname",
				    &__ypcurrent, &__ypcurrentlen,
				    &data, &datalen);
			}
			if (r) {
				__ypmode = 0;
				__ypcurrent = NULL;
				if (r == YPERR_NOMORE)
					continue;
				else
					return 0;
			}
			bcopy(data, line, datalen);
			free(data);
			line[datalen] = '\0';
			bp = line;
			goto parse;
		}
#endif
		if (!fgets(line, sizeof(gs->line), _gr_fp)) {
			if (feof(_gr_fp) && !ferror(_gr_fp))
				errno = saved_errno;
			return 0;
		}
		bp = line;
		/* skip lines that are too big */
		if (!strchr(line, '\n')) {
			int ch;

			while ((ch = getc_unlocked(_gr_fp)) != '\n' &&
			    ch != EOF)
				;
			continue;
		}
#ifdef YP
		if (line[0] == '+' || line[0] == '-') {
			if (__ypdomain == NULL &&
			    yp_get_default_domain(&__ypdomain))
				goto parse;
			switch (yp_bind(__ypdomain)) {
			case 0:
				break;
			case YPERR_BADARGS:
			case YPERR_YPBIND:
				goto parse;
			default:
				return 0;
			}
		}
		if (line[0] == '+') {
			switch (line[1]) {
			case ':':
			case '\0':
			case '\n':
				if (foundyp) {
					*foundyp = 1;
					errno = saved_errno;
					return 0;
				}
				if (!search) {
					__ypmode = 1;
					continue;
				}
				if (name) {
					r = yp_match(__ypdomain,
					    "group.byname", name, strlen(name),
					    &data, &datalen);
				} else {
					char buf[20];
					snprintf(buf, sizeof buf, "%u", gid);
					r = yp_match(__ypdomain, "group.bygid",
					    buf, strlen(buf), &data, &datalen);
				}
				switch (r) {
				case 0:
					break;
				case YPERR_KEY:
					continue;
				default:
					return 0;
				}
				bcopy(data, line, datalen);
				free(data);
				line[datalen] = '\0';
				bp = line;
				p_gr->gr_name = strsep(&bp, ":\n");
				if (__ypexclude_is(&__ypexhead, p_gr->gr_name))
					continue;
				p_gr->gr_passwd = strsep(&bp, ":\n");
				if (!(cp = strsep(&bp, ":\n")))
					continue;
				if (name) {
					ul = strtoul(cp, &endp, 10);
					if (*endp != '\0' || endp == cp ||
					    ul >= GID_MAX)
						continue;
					p_gr->gr_gid = ul;
				} else
					p_gr->gr_gid = gid;
				goto found_it;
			default:
				bp = strsep(&bp, ":\n") + 1;
				if ((search && name && strcmp(bp, name)) ||
				    __ypexclude_is(&__ypexhead, bp))
					continue;
				r = yp_match(__ypdomain, "group.byname",
				    bp, strlen(bp), &data, &datalen);
				switch (r) {
				case 0:
					break;
				case YPERR_KEY:
					continue;
				default:
					return 0;
				}
				bcopy(data, line, datalen);
				free(data);
				line[datalen] = '\0';
				bp = line;
			}
		} else if (line[0] == '-') {
			if (__ypexclude_add(&__ypexhead,
			    strsep(&line, ":\n") + 1))
				return 0;
			if (foundyp) {
				*foundyp = -1;
				errno = saved_errno;
				return 0;
			}
			continue;
		}
parse:
#endif
		p_gr->gr_name = strsep(&bp, ":\n");
		if (search && name && strcmp(p_gr->gr_name, name))
			continue;
#ifdef YP
		if (__ypmode && __ypexclude_is(&__ypexhead, p_gr->gr_name))
			continue;
#endif
		p_gr->gr_passwd = strsep(&bp, ":\n");
		if (!(cp = strsep(&bp, ":\n")))
			continue;
		ul = strtoul(cp, &endp, 10);
		if (endp == cp || *endp != '\0' || ul >= GID_MAX)
			continue;
		p_gr->gr_gid = ul;
		if (search && name == NULL && p_gr->gr_gid != gid)
			continue;
#ifdef YP
	found_it:
#endif
		cp = NULL;
		if (bp == NULL)
			continue;
		for (m = p_gr->gr_mem = members;; bp++) {
			if (m == &members[MAXGRP - 1])
				break;
			if (*bp == ',') {
				if (cp) {
					*bp = '\0';
					*m++ = cp;
					cp = NULL;
				}
			} else if (*bp == '\0' || *bp == '\n' || *bp == ' ') {
				if (cp) {
					*bp = '\0';
					*m++ = cp;
				}
				break;
			} else if (cp == NULL)
				cp = bp;
		}
		*m = NULL;
		errno = saved_errno;
		return 1;
	}
	/* NOTREACHED */
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: getgrent.c,v 1.46 2015/12/01 15:08:25 deraadt Exp $ */
2			/*
3			* Copyright (c) 1989, 1993
4			* The Regents of the University of California. All rights reserved.
5			* Portions Copyright (c) 1994, Jason Downs. All Rights Reserved.
6			*
7			* Redistribution and use in source and binary forms, with or without
8			* modification, are permitted provided that the following conditions
9			* are met:
10			* 1. Redistributions of source code must retain the above copyright
11			* notice, this list of conditions and the following disclaimer.
12			* 2. Redistributions in binary form must reproduce the above copyright
13			* notice, this list of conditions and the following disclaimer in the
14			* documentation and/or other materials provided with the distribution.
15			* 3. Neither the name of the University nor the names of its contributors
16			* may be used to endorse or promote products derived from this software
17			* without specific prior written permission.
18			*
19			* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20			* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22			* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23			* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24			* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25			* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27			* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28			* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29			* SUCH DAMAGE.
30			*/
31
32			#include <sys/types.h>
33			#include <stdio.h>
34			#include <stdlib.h>
35			#include <string.h>
36			#include <limits.h>
37			#include <unistd.h>
38			#include <grp.h>
39			#include <errno.h>
40			#ifdef YP
41			#include <rpc/rpc.h>
42			#include <rpcsvc/yp.h>
43			#include <rpcsvc/ypclnt.h>
44			#include "ypinternal.h"
45			#include "ypexclude.h"
46			#endif
47			#include "thread_private.h"
48
49			/* This global storage is locked for the non-rentrant functions */
50			_THREAD_PRIVATE_KEY(gr_storage);
51			static struct group_storage {
52			#define MAXGRP 200
53			char *members[MAXGRP];
54			#define MAXLINELENGTH 1024
55			char line[MAXLINELENGTH];
56			} gr_storage;
57			#define GETGR_R_SIZE_MAX _GR_BUF_LEN
58
59			/* File pointers are locked with the 'gr' mutex */
60			_THREAD_PRIVATE_KEY(gr);
61			static FILE *_gr_fp;
62			static struct group _gr_group;
63			static int _gr_stayopen;
64			static int grscan(int, gid_t, const char , struct group , struct group_storage *,
65			int *);
66			static int start_gr(void);
67			static void endgrent_basic(void);
68
69			static struct group getgrnam_gs(const char , struct group *,
70			struct group_storage *);
71			static struct group getgrgid_gs(gid_t, struct group ,
72			struct group_storage *);
73
74			#ifdef YP
75			static struct _ypexclude *__ypexhead = NULL;
76			static int __ypmode = 0;
77			static char __ypcurrent, __ypdomain;
78			static int __ypcurrentlen;
79			#endif
80
81			struct group *
82			_getgrent_yp(int *foundyp)
83			{
84			struct group p_gr = (struct group)_THREAD_PRIVATE(gr, _gr_group, NULL);
85			struct group_storage gs = (struct group_storage )_THREAD_PRIVATE(gr_storage,
86			gr_storage, NULL);
87
88			_THREAD_PRIVATE_MUTEX_LOCK(gr);
89			if ((!_gr_fp && !start_gr()) \|\| !grscan(0, 0, NULL, p_gr, gs, foundyp))
90			p_gr = NULL;
91			_THREAD_PRIVATE_MUTEX_UNLOCK(gr);
92			return (p_gr);
93			}
94
95			struct group *
96			getgrent(void)
97			{
98			return (_getgrent_yp(NULL));
99			}
100
101			static struct group *
102			getgrnam_gs(const char name, struct group p_gr, struct group_storage *gs)
103			{
104			int rval;
105
106			_THREAD_PRIVATE_MUTEX_LOCK(gr);
107			if (!start_gr())
108			rval = 0;
109			else {
110			rval = grscan(1, 0, name, p_gr, gs, NULL);
111			if (!_gr_stayopen)
112			endgrent_basic();
113			}
114			_THREAD_PRIVATE_MUTEX_UNLOCK(gr);
115			return(rval ? p_gr : NULL);
116			}
117
118			struct group *
119			getgrnam(const char *name)
120			{
121			struct group p_gr = (struct group)_THREAD_PRIVATE(gr,_gr_group,NULL);
122			struct group_storage gs = (struct group_storage )_THREAD_PRIVATE(gr_storage,
123			gr_storage, NULL);
124
125			return getgrnam_gs(name, p_gr, gs);
126			}
127
128			int
129			getgrnam_r(const char name, struct group grp, char *buffer,
130			size_t bufsize, struct group **result)
131			{
132			int errnosave;
133			int ret;
134
135			if (bufsize < GETGR_R_SIZE_MAX)
136			return ERANGE;
137			errnosave = errno;
138			errno = 0;
139			result = getgrnam_gs(name, grp, (struct group_storage )buffer);
140			if (*result == NULL)
141			ret = errno;
142			else
143			ret = 0;
144			errno = errnosave;
145			return ret;
146			}
147
148			static struct group *
149			getgrgid_gs(gid_t gid, struct group p_gr, struct group_storage gs)
150			{
151			int rval;
152
153			_THREAD_PRIVATE_MUTEX_LOCK(gr);
154			if (!start_gr())
155			rval = 0;
156			else {
157			rval = grscan(1, gid, NULL, p_gr, gs, NULL);
158			if (!_gr_stayopen)
159			endgrent_basic();
160			}
161			_THREAD_PRIVATE_MUTEX_UNLOCK(gr);
162			return(rval ? p_gr : NULL);
163			}
164
165			struct group *
166			getgrgid(gid_t gid)
167			{
168			struct group p_gr = (struct group)_THREAD_PRIVATE(gr, _gr_group, NULL);
169			struct group_storage gs = (struct group_storage )_THREAD_PRIVATE(gr_storage,
170			gr_storage, NULL);
171
172			return getgrgid_gs(gid, p_gr, gs);
173			}
174
175			int
176			getgrgid_r(gid_t gid, struct group grp, char buffer, size_t bufsize,
177			struct group **result)
178			{
179			int errnosave;
180			int ret;
181
182			if (bufsize < GETGR_R_SIZE_MAX)
183			return ERANGE;
184			errnosave = errno;
185			errno = 0;
186			result = getgrgid_gs(gid, grp, (struct group_storage )buffer);
187			if (*result == NULL)
188			ret = errno;
189			else
190			ret = 0;
191			errno = errnosave;
192			return ret;
193			}
194			DEF_WEAK(getgrgid_r);
195
196			static int
197			start_gr(void)
198			{
199			if (_gr_fp) {
200			rewind(_gr_fp);
201			#ifdef YP
202			__ypmode = 0;
203			free(__ypcurrent);
204			__ypcurrent = NULL;
205			if (__ypexhead)
206			__ypexclude_free(&__ypexhead);
207			__ypexhead = NULL;
208			#endif
209			return(1);
210			}
211
212			#ifdef YP
213			/*
214			* Hint to the kernel that a passwd database operation is happening.
215			*/
216			(void)access("/var/run/ypbind.lock", R_OK);
217			#endif
218
219			return((_gr_fp = fopen(_PATH_GROUP, "re")) ? 1 : 0);
220			}
221
222			void
223			setgrent(void)
224			{
225			int saved_errno;
226
227			saved_errno = errno;
228			setgroupent(0);
229			errno = saved_errno;
230			}
231			DEF_WEAK(setgrent);
232
233			int
234			setgroupent(int stayopen)
235			{
236			int retval;
237
238			_THREAD_PRIVATE_MUTEX_LOCK(gr);
239			if (!start_gr())
240			retval = 0;
241			else {
242			_gr_stayopen = stayopen;
243			retval = 1;
244			}
245			_THREAD_PRIVATE_MUTEX_UNLOCK(gr);
246			return (retval);
247			}
248			DEF_WEAK(setgroupent);
249
250			static
251			void
252			endgrent_basic(void)
253			{
254			int saved_errno;
255
256			if (_gr_fp) {
257			saved_errno = errno;
258			fclose(_gr_fp);
259			_gr_fp = NULL;
260			#ifdef YP
261			__ypmode = 0;
262			free(__ypcurrent);
263			__ypcurrent = NULL;
264			if (__ypexhead)
265			__ypexclude_free(&__ypexhead);
266			__ypexhead = NULL;
267			#endif
268			errno = saved_errno;
269			}
270			}
271
272			void
273			endgrent(void)
274			{
275			_THREAD_PRIVATE_MUTEX_LOCK(gr);
276			endgrent_basic();
277			_THREAD_PRIVATE_MUTEX_UNLOCK(gr);
278			}
279			DEF_WEAK(endgrent);
280
281			static int
282			grscan(int search, gid_t gid, const char name, struct group p_gr,
283			struct group_storage gs, int foundyp)
284			{
285			char cp, *m;
286			char bp, endp;
287			u_long ul;
288			#ifdef YP
289			char key, data;
290			int keylen, datalen;
291			int r;
292			#endif
293			char **members;
294			char *line;
295			int saved_errno;
296
297			if (gs == NULL)
298			return 0;
299			members = gs->members;
300			line = gs->line;
301			saved_errno = errno;
302
303			for (;;) {
304			#ifdef YP
305			if (__ypmode) {
306			if (__ypcurrent) {
307			r = yp_next(__ypdomain, "group.byname",
308			__ypcurrent, __ypcurrentlen,
309			&key, &keylen, &data, &datalen);
310			free(__ypcurrent);
311			__ypcurrent = key;
312			__ypcurrentlen = keylen;
313			} else {
314			r = yp_first(__ypdomain, "group.byname",
315			&__ypcurrent, &__ypcurrentlen,
316			&data, &datalen);
317			}
318			if (r) {
319			__ypmode = 0;
320			__ypcurrent = NULL;
321			if (r == YPERR_NOMORE)
322			continue;
323			else
324			return 0;
325			}
326			bcopy(data, line, datalen);
327			free(data);
328			line[datalen] = '\0';
329			bp = line;
330			goto parse;
331			}
332			#endif
333			if (!fgets(line, sizeof(gs->line), _gr_fp)) {
334			if (feof(_gr_fp) && !ferror(_gr_fp))
335			errno = saved_errno;
336			return 0;
337			}
338			bp = line;
339			/* skip lines that are too big */
340			if (!strchr(line, '\n')) {
341			int ch;
342
343			while ((ch = getc_unlocked(_gr_fp)) != '\n' &&
344			ch != EOF)
345			;
346			continue;
347			}
348			#ifdef YP
349			if (line[0] == '+' \|\| line[0] == '-') {
350			if (__ypdomain == NULL &&
351			yp_get_default_domain(&__ypdomain))
352			goto parse;
353			switch (yp_bind(__ypdomain)) {
354			case 0:
355			break;
356			case YPERR_BADARGS:
357			case YPERR_YPBIND:
358			goto parse;
359			default:
360			return 0;
361			}
362			}
363			if (line[0] == '+') {
364			switch (line[1]) {
365			case ':':
366			case '\0':
367			case '\n':
368			if (foundyp) {
369			*foundyp = 1;
370			errno = saved_errno;
371			return 0;
372			}
373			if (!search) {
374			__ypmode = 1;
375			continue;
376			}
377			if (name) {
378			r = yp_match(__ypdomain,
379			"group.byname", name, strlen(name),
380			&data, &datalen);
381			} else {
382			char buf[20];
383			snprintf(buf, sizeof buf, "%u", gid);
384			r = yp_match(__ypdomain, "group.bygid",
385			buf, strlen(buf), &data, &datalen);
386			}
387			switch (r) {
388			case 0:
389			break;
390			case YPERR_KEY:
391			continue;
392			default:
393			return 0;
394			}
395			bcopy(data, line, datalen);
396			free(data);
397			line[datalen] = '\0';
398			bp = line;
399			p_gr->gr_name = strsep(&bp, ":\n");
400			if (__ypexclude_is(&__ypexhead, p_gr->gr_name))
401			continue;
402			p_gr->gr_passwd = strsep(&bp, ":\n");
403			if (!(cp = strsep(&bp, ":\n")))
404			continue;
405			if (name) {
406			ul = strtoul(cp, &endp, 10);
407			if (*endp != '\0' \|\| endp == cp \|\|
408			ul >= GID_MAX)
409			continue;
410			p_gr->gr_gid = ul;
411			} else
412			p_gr->gr_gid = gid;
413			goto found_it;
414			default:
415			bp = strsep(&bp, ":\n") + 1;
416			if ((search && name && strcmp(bp, name)) \|\|
417			__ypexclude_is(&__ypexhead, bp))
418			continue;
419			r = yp_match(__ypdomain, "group.byname",
420			bp, strlen(bp), &data, &datalen);
421			switch (r) {
422			case 0:
423			break;
424			case YPERR_KEY:
425			continue;
426			default:
427			return 0;
428			}
429			bcopy(data, line, datalen);
430			free(data);
431			line[datalen] = '\0';
432			bp = line;
433			}
434			} else if (line[0] == '-') {
435			if (__ypexclude_add(&__ypexhead,
436			strsep(&line, ":\n") + 1))
437			return 0;
438			if (foundyp) {
439			*foundyp = -1;
440			errno = saved_errno;
441			return 0;
442			}
443			continue;
444			}
445			parse:
446			#endif
447			p_gr->gr_name = strsep(&bp, ":\n");
448			if (search && name && strcmp(p_gr->gr_name, name))
449			continue;
450			#ifdef YP
451			if (__ypmode && __ypexclude_is(&__ypexhead, p_gr->gr_name))
452			continue;
453			#endif
454			p_gr->gr_passwd = strsep(&bp, ":\n");
455			if (!(cp = strsep(&bp, ":\n")))
456			continue;
457			ul = strtoul(cp, &endp, 10);
458			if (endp == cp \|\| *endp != '\0' \|\| ul >= GID_MAX)
459			continue;
460			p_gr->gr_gid = ul;
461			if (search && name == NULL && p_gr->gr_gid != gid)
462			continue;
463			#ifdef YP
464			found_it:
465			#endif
466			cp = NULL;
467			if (bp == NULL)
468			continue;
469			for (m = p_gr->gr_mem = members;; bp++) {
470			if (m == &members[MAXGRP - 1])
471			break;
472			if (*bp == ',') {
473			if (cp) {
474			*bp = '\0';
475			*m++ = cp;
476			cp = NULL;
477			}
478			} else if (bp == '\0' \|\| bp == '\n' \|\| *bp == ' ') {
479			if (cp) {
480			*bp = '\0';
481			*m++ = cp;
482			}
483			break;
484			} else if (cp == NULL)
485			cp = bp;
486			}
487			*m = NULL;
488			errno = saved_errno;
489			return 1;
490			}
491			/* NOTREACHED */
492			}