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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libc/gen/getgrouplist.c	Lines:	0	92	0.0 %
Date:	2017-11-13	Branches:	0	84	0.0 %


/*	$OpenBSD: getgrouplist.c,v 1.27 2015/12/01 15:08:25 deraadt Exp $ */
/*
 * Copyright (c) 2008 Ingo Schwarze <schwarze@usta.de>
 * Copyright (c) 1991, 1993
 *	The Regents of the University of California.  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.
 */

/*
 * get credential
 */
#include <sys/types.h>
#include <sys/limits.h>
#include <string.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <grp.h>
#include <pwd.h>

#include <rpc/rpc.h>
#include <rpcsvc/yp.h>
#include <rpcsvc/ypclnt.h>

#ifdef YP
#define _PATH_NETID	"/etc/netid"
#define MAXLINELENGTH	1024

static int _parse_netid(char*, uid_t, gid_t*, int*, int);
static int _read_netid(const char *, uid_t, gid_t*, int*, int);

/*
 * Parse one string of the form "uid:gid[,gid[,...]]".
 * If the uid matches, add the groups to the group list.
 * If the groups fit, return 1, otherwise return -1.
 * If the uid does not match, return 0.
 */
static int
_parse_netid(char *netid, uid_t uid, gid_t *groups, int *ngroups,
	     int maxgroups)
{
	const char *errstr = NULL;
	char *start, *p;
	uid_t tuid;
	gid_t gid;
	int i;

	/* Check the uid. */
	p = strchr(netid, ':');
	if (!p)
		return (0);
	*p++ = '\0';
	tuid = (uid_t)strtonum(netid, 0, UID_MAX, &errstr);
	if (errstr || tuid != uid)
		return (0);

        /* Loop over the gids. */
	while (p && *p) {
		start = p;
		p = strchr(start, ',');
		if (p)
			*p++ = '\0';
		gid = (gid_t)strtonum(start, 0, GID_MAX, &errstr);
		if (errstr)
			continue;

		/* Skip this group if it is already in the list. */
		for (i = 0; i < *ngroups; i++)
			if (groups[i] == gid)
				break;

		/* Try to add this new group to the list. */
		if (i == *ngroups) {
			if (*ngroups >= maxgroups)
				return (-1);
			groups[(*ngroups)++] = gid;
		}
	}
	return (1);
}

/*
 * Search /etc/netid for a particular uid and process that line.
 * See _parse_netid for details, including return values.
 */
static int
_read_netid(const char *key, uid_t uid, gid_t *groups, int *ngroups,
	    int maxgroups)
{
	FILE *fp;
	char line[MAXLINELENGTH], *p;
	int found = 0;

	fp = fopen(_PATH_NETID, "re");
	if (!fp)
		return (0);
	while (!found && fgets(line, sizeof(line), fp)) {
		p = strchr(line, '\n');
		if (p)
			*p = '\0';
		else { /* Skip lines that are too long. */
			int ch;
			while ((ch = getc_unlocked(fp)) != '\n' && ch != EOF)
				;
			continue;
		}
		p = strchr(line, ' ');
		if (!p)
			continue;
		*p++ = '\0';
		if (strcmp(line, key))
			continue;
		found = _parse_netid(p, uid, groups, ngroups, maxgroups);
	}
	(void)fclose(fp);
	return (found);
}
#endif /* YP */

int
getgrouplist(const char *uname, gid_t agroup, gid_t *groups, int *grpcnt)
{
	int i, ngroups = 0, ret = 0, maxgroups = *grpcnt, bail;
	int needyp = 0, foundyp = 0;
	int *skipyp = &foundyp;
	extern struct group *_getgrent_yp(int *);
	struct group *grp;

	/*
	 * install primary group
	 */
	if (ngroups >= maxgroups) {
		*grpcnt = ngroups;
		return (-1);
	}
	groups[ngroups++] = agroup;

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

	/*
	 * Scan the group file to find additional groups.
	 */
	setgrent();
	while ((grp = _getgrent_yp(skipyp)) || foundyp) {
		if (foundyp) {
			if (foundyp > 0)
				needyp = 1;
			else
				skipyp = NULL;
			foundyp = 0;
			continue;
		}
		if (grp->gr_gid == agroup)
			continue;
		for (bail = 0, i = 0; bail == 0 && i < ngroups; i++)
			if (groups[i] == grp->gr_gid)
				bail = 1;
		if (bail)
			continue;
		for (i = 0; grp->gr_mem[i]; i++) {
			if (!strcmp(grp->gr_mem[i], uname)) {
				if (ngroups >= maxgroups) {
					ret = -1;
					goto out;
				}
				groups[ngroups++] = grp->gr_gid;
				break;
			}
		}
	}

#ifdef YP
	/*
	 * If we were told that there is a YP marker, look at netid data.
	 */
	if (skipyp && needyp) {
		char buf[MAXLINELENGTH], *ypdata = NULL, *key;
		static char *__ypdomain;
		struct passwd pwstore;
		int ypdatalen;

		/* Construct the netid key to look up. */
		if (getpwnam_r(uname, &pwstore, buf, sizeof buf, NULL) ||
		    (!__ypdomain && yp_get_default_domain(&__ypdomain)))
			goto out;
		i = asprintf(&key, "unix.%u@%s", pwstore.pw_uid, __ypdomain);
		if (i == -1)
			goto out;

		/* First scan the static netid file. */
		switch (_read_netid(key, pwstore.pw_uid,
		    groups, &ngroups, maxgroups)) {
		case -1:
			ret = -1;
			/* FALLTHROUGH */
		case 1:
			free(key);
			goto out;
		default:
			break;
		}

		/* Only access YP when there is no static entry. */
		if (!yp_bind(__ypdomain) &&
		    !yp_match(__ypdomain, "netid.byname", key,
			     (int)strlen(key), &ypdata, &ypdatalen))
			if (_parse_netid(ypdata, pwstore.pw_uid,
			    groups, &ngroups, maxgroups) == -1)
				ret = -1;

		free(key);
		free(ypdata);
	}
#endif /* YP */

out:
	endgrent();
	*grpcnt = ngroups;
	return (ret);
}
DEF_WEAK(getgrouplist);


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: getgrouplist.c,v 1.27 2015/12/01 15:08:25 deraadt Exp $ */
2			/*
3			* Copyright (c) 2008 Ingo Schwarze <schwarze@usta.de>
4			* Copyright (c) 1991, 1993
5			* The Regents of the University of California. 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			/*
33			* get credential
34			*/
35			#include <sys/types.h>
36			#include <sys/limits.h>
37			#include <string.h>
38			#include <unistd.h>
39			#include <stdio.h>
40			#include <stdlib.h>
41			#include <grp.h>
42			#include <pwd.h>
43
44			#include <rpc/rpc.h>
45			#include <rpcsvc/yp.h>
46			#include <rpcsvc/ypclnt.h>
47
48			#ifdef YP
49			#define _PATH_NETID "/etc/netid"
50			#define MAXLINELENGTH 1024
51
52			static int _parse_netid(char, uid_t, gid_t, int*, int);
53			static int _read_netid(const char , uid_t, gid_t, int*, int);
54
55			/*
56			* Parse one string of the form "uid:gid[,gid[,...]]".
57			* If the uid matches, add the groups to the group list.
58			* If the groups fit, return 1, otherwise return -1.
59			* If the uid does not match, return 0.
60			*/
61			static int
62			_parse_netid(char netid, uid_t uid, gid_t groups, int *ngroups,
63			int maxgroups)
64			{
65			const char *errstr = NULL;
66			char start, p;
67			uid_t tuid;
68			gid_t gid;
69			int i;
70
71			/* Check the uid. */
72			p = strchr(netid, ':');
73			if (!p)
74			return (0);
75			*p++ = '\0';
76			tuid = (uid_t)strtonum(netid, 0, UID_MAX, &errstr);
77			if (errstr \|\| tuid != uid)
78			return (0);
79
80			/* Loop over the gids. */
81			while (p && *p) {
82			start = p;
83			p = strchr(start, ',');
84			if (p)
85			*p++ = '\0';
86			gid = (gid_t)strtonum(start, 0, GID_MAX, &errstr);
87			if (errstr)
88			continue;
89
90			/* Skip this group if it is already in the list. */
91			for (i = 0; i < *ngroups; i++)
92			if (groups[i] == gid)
93			break;
94
95			/* Try to add this new group to the list. */
96			if (i == *ngroups) {
97			if (*ngroups >= maxgroups)
98			return (-1);
99			groups[(*ngroups)++] = gid;
100			}
101			}
102			return (1);
103			}
104
105			/*
106			* Search /etc/netid for a particular uid and process that line.
107			* See _parse_netid for details, including return values.
108			*/
109			static int
110			_read_netid(const char key, uid_t uid, gid_t groups, int *ngroups,
111			int maxgroups)
112			{
113			FILE *fp;
114			char line[MAXLINELENGTH], *p;
115			int found = 0;
116
117			fp = fopen(_PATH_NETID, "re");
118			if (!fp)
119			return (0);
120			while (!found && fgets(line, sizeof(line), fp)) {
121			p = strchr(line, '\n');
122			if (p)
123			*p = '\0';
124			else { /* Skip lines that are too long. */
125			int ch;
126			while ((ch = getc_unlocked(fp)) != '\n' && ch != EOF)
127			;
128			continue;
129			}
130			p = strchr(line, ' ');
131			if (!p)
132			continue;
133			*p++ = '\0';
134			if (strcmp(line, key))
135			continue;
136			found = _parse_netid(p, uid, groups, ngroups, maxgroups);
137			}
138			(void)fclose(fp);
139			return (found);
140			}
141			#endif /* YP */
142
143			int
144			getgrouplist(const char uname, gid_t agroup, gid_t groups, int *grpcnt)
145			{
146			int i, ngroups = 0, ret = 0, maxgroups = *grpcnt, bail;
147			int needyp = 0, foundyp = 0;
148			int *skipyp = &foundyp;
149			extern struct group _getgrent_yp(int );
150			struct group *grp;
151
152			/*
153			* install primary group
154			*/
155			if (ngroups >= maxgroups) {
156			*grpcnt = ngroups;
157			return (-1);
158			}
159			groups[ngroups++] = agroup;
160
161			#ifdef YP
162			/*
163			* Hint to the kernel that a passwd database operation is happening.
164			*/
165			(void)access("/var/run/ypbind.lock", R_OK);
166			#endif
167
168			/*
169			* Scan the group file to find additional groups.
170			*/
171			setgrent();
172			while ((grp = _getgrent_yp(skipyp)) \|\| foundyp) {
173			if (foundyp) {
174			if (foundyp > 0)
175			needyp = 1;
176			else
177			skipyp = NULL;
178			foundyp = 0;
179			continue;
180			}
181			if (grp->gr_gid == agroup)
182			continue;
183			for (bail = 0, i = 0; bail == 0 && i < ngroups; i++)
184			if (groups[i] == grp->gr_gid)
185			bail = 1;
186			if (bail)
187			continue;
188			for (i = 0; grp->gr_mem[i]; i++) {
189			if (!strcmp(grp->gr_mem[i], uname)) {
190			if (ngroups >= maxgroups) {
191			ret = -1;
192			goto out;
193			}
194			groups[ngroups++] = grp->gr_gid;
195			break;
196			}
197			}
198			}
199
200			#ifdef YP
201			/*
202			* If we were told that there is a YP marker, look at netid data.
203			*/
204			if (skipyp && needyp) {
205			char buf[MAXLINELENGTH], ypdata = NULL, key;
206			static char *__ypdomain;
207			struct passwd pwstore;
208			int ypdatalen;
209
210			/* Construct the netid key to look up. */
211			if (getpwnam_r(uname, &pwstore, buf, sizeof buf, NULL) \|\|
212			(!__ypdomain && yp_get_default_domain(&__ypdomain)))
213			goto out;
214			i = asprintf(&key, "unix.%u@%s", pwstore.pw_uid, __ypdomain);
215			if (i == -1)
216			goto out;
217
218			/* First scan the static netid file. */
219			switch (_read_netid(key, pwstore.pw_uid,
220			groups, &ngroups, maxgroups)) {
221			case -1:
222			ret = -1;
223			/* FALLTHROUGH */
224			case 1:
225			free(key);
226			goto out;
227			default:
228			break;
229			}
230
231			/* Only access YP when there is no static entry. */
232			if (!yp_bind(__ypdomain) &&
233			!yp_match(__ypdomain, "netid.byname", key,
234			(int)strlen(key), &ypdata, &ypdatalen))
235			if (_parse_netid(ypdata, pwstore.pw_uid,
236			groups, &ngroups, maxgroups) == -1)
237			ret = -1;
238
239			free(key);
240			free(ypdata);
241			}
242			#endif /* YP */
243
244			out:
245			endgrent();
246			*grpcnt = ngroups;
247			return (ret);
248			}
249			DEF_WEAK(getgrouplist);