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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.sbin/ypserv/revnetgroup/parse_netgroup.c	Lines:	0	107	0.0 %
Date:	2017-11-13	Branches:	0	84	0.0 %


/* $OpenBSD: parse_netgroup.c,v 1.13 2015/12/08 07:16:33 mmcc Exp $ */
/*
 * Copyright (c) 1992, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Rick Macklem at The University of Guelph.
 *
 * 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.
 *
 *	$FreeBSD: parse_netgroup.c,v 1.5 1997/02/22 14:22:02 peter Exp $
 */

/*
 * This is a specially hacked-up version of getnetgrent.c used to parse
 * data from the stored hash table of netgroup info rather than from a
 * file. It's used mainly for the parse_netgroup() function. All the YP
 * stuff and file support has been stripped out since it isn't needed.
 */

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include "hash.h"

/*
 * Static Variables and functions used by setnetgrent(), getnetgrent() and
 * __endnetgrent().
 * There are two linked lists:
 * - linelist is just used by setnetgrent() to parse the net group file via.
 *   parse_netgrp()
 * - netgrp is the list of entries for the current netgroup
 */
struct linelist {
	struct linelist	*l_next;	/* Chain ptr. */
	int		l_parsed;	/* Flag for cycles */
	char		*l_groupname;	/* Name of netgroup */
	char		*l_line;	/* Netgroup entrie(s) to be parsed */
};

struct netgrp {
	struct netgrp	*ng_next;	/* Chain ptr */
	char		*ng_str[3];	/* Field pointers, see below */
};
#define NG_HOST		0	/* Host name */
#define NG_USER		1	/* User name */
#define NG_DOM		2	/* and Domain name */

static struct linelist	*linehead = NULL;
static struct netgrp	*nextgrp = NULL;
static struct {
	struct netgrp	*gr;
	char		*grname;
} grouphead = {
	NULL,
	NULL,
};

static int parse_netgrp(char *);
static struct linelist *read_for_group(char *);
void __setnetgrent(char *), __endnetgrent(void);
int __getnetgrent(char **, char **, char **);
extern struct group_entry *gtable[];

/*
 * setnetgrent()
 * Parse the netgroup file looking for the netgroup and build the list
 * of netgrp structures. Let parse_netgrp() and read_for_group() do
 * most of the work.
 */
void
__setnetgrent(char *group)
{
	/* Sanity check */

	if (group == NULL || !strlen(group))
		return;

	if (grouphead.gr == NULL || strcmp(group, grouphead.grname)) {
		__endnetgrent();
		if (parse_netgrp(group))
			__endnetgrent();
		else
			grouphead.grname = strdup(group);
	}
	nextgrp = grouphead.gr;
}

/*
 * Get the next netgroup off the list.
 */
int
__getnetgrent(char **hostp, char **userp, char **domp)
{
	if (nextgrp) {
		*hostp = nextgrp->ng_str[NG_HOST];
		*userp = nextgrp->ng_str[NG_USER];
		*domp = nextgrp->ng_str[NG_DOM];
		nextgrp = nextgrp->ng_next;
		return (1);
	}
	return (0);
}

/*
 * __endnetgrent() - cleanup
 */
void
__endnetgrent(void)
{
	struct linelist *lp, *olp;
	struct netgrp *gp, *ogp;

	lp = linehead;
	while (lp) {
		olp = lp;
		lp = lp->l_next;
		free(olp->l_groupname);
		free(olp->l_line);
		free(olp);
	}
	linehead = NULL;
	free(grouphead.grname);
	grouphead.grname = NULL;
	gp = grouphead.gr;
	while (gp) {
		ogp = gp;
		gp = gp->ng_next;
		free(ogp->ng_str[NG_HOST]);
		free(ogp->ng_str[NG_USER]);
		free(ogp->ng_str[NG_DOM]);
		free(ogp);
	}
	grouphead.gr = NULL;
}

/*
 * Parse the netgroup file setting up the linked lists.
 */
static int
parse_netgrp(char *group)
{
	char *spos, *epos;
	int len, strpos;
#ifdef DEBUG
	int fields;
#endif
	char *pos, *gpos;
	struct netgrp *grp;
	struct linelist *lp = linehead;

	/*
	 * First, see if the line has already been read in.
	 */
	while (lp) {
		if (!strcmp(group, lp->l_groupname))
			break;
		lp = lp->l_next;
	}
	if (lp == NULL && (lp = read_for_group(group)) == NULL)
		return (1);
	if (lp->l_parsed) {
#ifdef DEBUG
		/*
		 * This error message is largely superflous since the
		 * code handles the error condition successfully, and
		 * spewing it out from inside libc can actually hose
		 * certain programs.
		 */
		fprintf(stderr, "Cycle in netgroup %s\n", lp->l_groupname);
#endif
		return (1);
	} else
		lp->l_parsed = 1;
	pos = lp->l_line;
	/* Watch for null pointer dereferences, dammit! */
	while (pos != NULL && *pos != '\0') {
		if (*pos == '(') {
			grp = malloc(sizeof(struct netgrp));
			bzero(grp, sizeof(struct netgrp));
			grp->ng_next = grouphead.gr;
			grouphead.gr = grp;
			pos++;
			gpos = strsep(&pos, ")");
#ifdef DEBUG
			fields = 0;
#endif
			for (strpos = 0; strpos < 3; strpos++) {
				if ((spos = strsep(&gpos, ","))) {
#ifdef DEBUG
					fields++;
#endif
					while (*spos == ' ' || *spos == '\t')
						spos++;
					if ((epos = strpbrk(spos, " \t"))) {
						*epos = '\0';
						len = epos - spos;
					} else
						len = strlen(spos);
					if (len > 0) {
						grp->ng_str[strpos] = malloc(len + 1);
						bcopy(spos, grp->ng_str[strpos],
						    len + 1);
					}
				} else {
					/*
					 * All other systems I've tested
					 * return NULL for empty netgroup
					 * fields. It's up to user programs
					 * to handle the NULLs appropriately.
					 */
					grp->ng_str[strpos] = NULL;
				}
			}
#ifdef DEBUG
			/*
			 * Note: on other platforms, malformed netgroup
			 * entries are not normally flagged. While we
			 * can catch bad entries and report them, we should
			 * stay silent by default for compatibility's sake.
			 */
			if (fields < 3)
					fprintf(stderr, "Bad entry (%s%s%s%s%s) in netgroup \"%s\"\n",
						grp->ng_str[NG_HOST] == NULL ? "" : grp->ng_str[NG_HOST],
						grp->ng_str[NG_USER] == NULL ? "" : ",",
						grp->ng_str[NG_USER] == NULL ? "" : grp->ng_str[NG_USER],
						grp->ng_str[NG_DOM] == NULL ? "" : ",",
						grp->ng_str[NG_DOM] == NULL ? "" : grp->ng_str[NG_DOM],
						lp->l_groupname);
#endif
		} else {
			spos = strsep(&pos, ", \t");
			if (parse_netgrp(spos))
				continue;
		}
		/* Watch for null pointer dereferences, dammit! */
		if (pos != NULL)
			while (*pos == ' ' || *pos == ',' || *pos == '\t')
				pos++;
	}
	return (0);
}

/*
 * Read the netgroup file and save lines until the line for the netgroup
 * is found. Return 1 if eof is encountered.
 */
static struct linelist *
read_for_group(char *group)
{
	char *pos, *spos, *linep = NULL, *olinep = NULL;
	int len, olen;
	int cont;
	struct linelist *lp;
	char line[LINSIZ + 1];
	char *data = NULL;

	data = lookup (gtable, group);
	snprintf(line, sizeof line, "%s %s", group, data);
	pos = (char *)&line;
#ifdef CANT_HAPPEN
	if (*pos == '#')
		continue;
#endif
	while (*pos == ' ' || *pos == '\t')
		pos++;
	spos = pos;
	while (*pos != ' ' && *pos != '\t' && *pos != '\n' &&
		*pos != '\0')
		pos++;
	len = pos - spos;
	while (*pos == ' ' || *pos == '\t')
		pos++;
	if (*pos != '\n' && *pos != '\0') {
		lp = malloc(sizeof(*lp));
		lp->l_parsed = 0;
		lp->l_groupname = malloc(len + 1);
		bcopy(spos, lp->l_groupname, len);
		*(lp->l_groupname + len) = '\0';
		len = strlen(pos);
		olen = 0;
			/*
			 * Loop around handling line continuations.
			 */
			do {
				if (*(pos + len - 1) == '\n')
					len--;
				if (*(pos + len - 1) == '\\') {
					len--;
					cont = 1;
				} else
					cont = 0;
				if (len > 0) {
					linep = malloc(olen + len + 1);
					if (olen > 0) {
						bcopy(olinep, linep, olen);
						free(olinep);
					}
					bcopy(pos, linep + olen, len);
					olen += len;
					*(linep + olen) = '\0';
					olinep = linep;
				}
#ifdef CANT_HAPPEN
				if (cont) {
					if (fgets(line, sizeof(line), netf)) {
						pos = line;
						len = strlen(pos);
					} else
						cont = 0;
				}
#endif
			} while (cont);
		lp->l_line = linep;
		lp->l_next = linehead;
		linehead = lp;
#ifdef CANT_HAPPEN
		/*
		 * If this is the one we wanted, we are done.
		 */
		if (!strcmp(lp->l_groupname, group))
#endif
			return (lp);
	}
	return (NULL);
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: parse_netgroup.c,v 1.13 2015/12/08 07:16:33 mmcc Exp $ */
2			/*
3			* Copyright (c) 1992, 1993
4			* The Regents of the University of California. All rights reserved.
5			*
6			* This code is derived from software contributed to Berkeley by
7			* Rick Macklem at The University of Guelph.
8			*
9			* Redistribution and use in source and binary forms, with or without
10			* modification, are permitted provided that the following conditions
11			* are met:
12			* 1. Redistributions of source code must retain the above copyright
13			* notice, this list of conditions and the following disclaimer.
14			* 2. Redistributions in binary form must reproduce the above copyright
15			* notice, this list of conditions and the following disclaimer in the
16			* documentation and/or other materials provided with the distribution.
17			* 3. Neither the name of the University nor the names of its contributors
18			* may be used to endorse or promote products derived from this software
19			* without specific prior written permission.
20			*
21			* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22			* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24			* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25			* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26			* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27			* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29			* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30			* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31			* SUCH DAMAGE.
32			*
33			* $FreeBSD: parse_netgroup.c,v 1.5 1997/02/22 14:22:02 peter Exp $
34			*/
35
36			/*
37			* This is a specially hacked-up version of getnetgrent.c used to parse
38			* data from the stored hash table of netgroup info rather than from a
39			* file. It's used mainly for the parse_netgroup() function. All the YP
40			* stuff and file support has been stripped out since it isn't needed.
41			*/
42
43			#include <stdio.h>
44			#include <string.h>
45			#include <stdlib.h>
46			#include <unistd.h>
47			#include "hash.h"
48
49			/*
50			* Static Variables and functions used by setnetgrent(), getnetgrent() and
51			* __endnetgrent().
52			* There are two linked lists:
53			* - linelist is just used by setnetgrent() to parse the net group file via.
54			* parse_netgrp()
55			* - netgrp is the list of entries for the current netgroup
56			*/
57			struct linelist {
58			struct linelist l_next; / Chain ptr. */
59			int l_parsed; /* Flag for cycles */
60			char l_groupname; / Name of netgroup */
61			char l_line; / Netgroup entrie(s) to be parsed */
62			};
63
64			struct netgrp {
65			struct netgrp ng_next; / Chain ptr */
66			char ng_str[3]; / Field pointers, see below */
67			};
68			#define NG_HOST 0 /* Host name */
69			#define NG_USER 1 /* User name */
70			#define NG_DOM 2 /* and Domain name */
71
72			static struct linelist *linehead = NULL;
73			static struct netgrp *nextgrp = NULL;
74			static struct {
75			struct netgrp *gr;
76			char *grname;
77			} grouphead = {
78			NULL,
79			NULL,
80			};
81
82			static int parse_netgrp(char *);
83			static struct linelist read_for_group(char );
84			void __setnetgrent(char *), __endnetgrent(void);
85			int __getnetgrent(char , char , char **);
86			extern struct group_entry *gtable[];
87
88			/*
89			* setnetgrent()
90			* Parse the netgroup file looking for the netgroup and build the list
91			* of netgrp structures. Let parse_netgrp() and read_for_group() do
92			* most of the work.
93			*/
94			void
95			__setnetgrent(char *group)
96			{
97			/* Sanity check */
98
99			if (group == NULL \|\| !strlen(group))
100			return;
101
102			if (grouphead.gr == NULL \|\| strcmp(group, grouphead.grname)) {
103			__endnetgrent();
104			if (parse_netgrp(group))
105			__endnetgrent();
106			else
107			grouphead.grname = strdup(group);
108			}
109			nextgrp = grouphead.gr;
110			}
111
112			/*
113			* Get the next netgroup off the list.
114			*/
115			int
116			__getnetgrent(char hostp, char userp, char **domp)
117			{
118			if (nextgrp) {
119			*hostp = nextgrp->ng_str[NG_HOST];
120			*userp = nextgrp->ng_str[NG_USER];
121			*domp = nextgrp->ng_str[NG_DOM];
122			nextgrp = nextgrp->ng_next;
123			return (1);
124			}
125			return (0);
126			}
127
128			/*
129			* __endnetgrent() - cleanup
130			*/
131			void
132			__endnetgrent(void)
133			{
134			struct linelist lp, olp;
135			struct netgrp gp, ogp;
136
137			lp = linehead;
138			while (lp) {
139			olp = lp;
140			lp = lp->l_next;
141			free(olp->l_groupname);
142			free(olp->l_line);
143			free(olp);
144			}
145			linehead = NULL;
146			free(grouphead.grname);
147			grouphead.grname = NULL;
148			gp = grouphead.gr;
149			while (gp) {
150			ogp = gp;
151			gp = gp->ng_next;
152			free(ogp->ng_str[NG_HOST]);
153			free(ogp->ng_str[NG_USER]);
154			free(ogp->ng_str[NG_DOM]);
155			free(ogp);
156			}
157			grouphead.gr = NULL;
158			}
159
160			/*
161			* Parse the netgroup file setting up the linked lists.
162			*/
163			static int
164			parse_netgrp(char *group)
165			{
166			char spos, epos;
167			int len, strpos;
168			#ifdef DEBUG
169			int fields;
170			#endif
171			char pos, gpos;
172			struct netgrp *grp;
173			struct linelist *lp = linehead;
174
175			/*
176			* First, see if the line has already been read in.
177			*/
178			while (lp) {
179			if (!strcmp(group, lp->l_groupname))
180			break;
181			lp = lp->l_next;
182			}
183			if (lp == NULL && (lp = read_for_group(group)) == NULL)
184			return (1);
185			if (lp->l_parsed) {
186			#ifdef DEBUG
187			/*
188			* This error message is largely superflous since the
189			* code handles the error condition successfully, and
190			* spewing it out from inside libc can actually hose
191			* certain programs.
192			*/
193			fprintf(stderr, "Cycle in netgroup %s\n", lp->l_groupname);
194			#endif
195			return (1);
196			} else
197			lp->l_parsed = 1;
198			pos = lp->l_line;
199			/* Watch for null pointer dereferences, dammit! */
200			while (pos != NULL && *pos != '\0') {
201			if (*pos == '(') {
202			grp = malloc(sizeof(struct netgrp));
203			bzero(grp, sizeof(struct netgrp));
204			grp->ng_next = grouphead.gr;
205			grouphead.gr = grp;
206			pos++;
207			gpos = strsep(&pos, ")");
208			#ifdef DEBUG
209			fields = 0;
210			#endif
211			for (strpos = 0; strpos < 3; strpos++) {
212			if ((spos = strsep(&gpos, ","))) {
213			#ifdef DEBUG
214			fields++;
215			#endif
216			while (spos == ' ' \|\| spos == '\t')
217			spos++;
218			if ((epos = strpbrk(spos, " \t"))) {
219			*epos = '\0';
220			len = epos - spos;
221			} else
222			len = strlen(spos);
223			if (len > 0) {
224			grp->ng_str[strpos] = malloc(len + 1);
225			bcopy(spos, grp->ng_str[strpos],
226			len + 1);
227			}
228			} else {
229			/*
230			* All other systems I've tested
231			* return NULL for empty netgroup
232			* fields. It's up to user programs
233			* to handle the NULLs appropriately.
234			*/
235			grp->ng_str[strpos] = NULL;
236			}
237			}
238			#ifdef DEBUG
239			/*
240			* Note: on other platforms, malformed netgroup
241			* entries are not normally flagged. While we
242			* can catch bad entries and report them, we should
243			* stay silent by default for compatibility's sake.
244			*/
245			if (fields < 3)
246			fprintf(stderr, "Bad entry (%s%s%s%s%s) in netgroup \"%s\"\n",
247			grp->ng_str[NG_HOST] == NULL ? "" : grp->ng_str[NG_HOST],
248			grp->ng_str[NG_USER] == NULL ? "" : ",",
249			grp->ng_str[NG_USER] == NULL ? "" : grp->ng_str[NG_USER],
250			grp->ng_str[NG_DOM] == NULL ? "" : ",",
251			grp->ng_str[NG_DOM] == NULL ? "" : grp->ng_str[NG_DOM],
252			lp->l_groupname);
253			#endif
254			} else {
255			spos = strsep(&pos, ", \t");
256			if (parse_netgrp(spos))
257			continue;
258			}
259			/* Watch for null pointer dereferences, dammit! */
260			if (pos != NULL)
261			while (pos == ' ' \|\| pos == ',' \|\| *pos == '\t')
262			pos++;
263			}
264			return (0);
265			}
266
267			/*
268			* Read the netgroup file and save lines until the line for the netgroup
269			* is found. Return 1 if eof is encountered.
270			*/
271			static struct linelist *
272			read_for_group(char *group)
273			{
274			char pos, spos, linep = NULL, olinep = NULL;
275			int len, olen;
276			int cont;
277			struct linelist *lp;
278			char line[LINSIZ + 1];
279			char *data = NULL;
280
281			data = lookup (gtable, group);
282			snprintf(line, sizeof line, "%s %s", group, data);
283			pos = (char *)&line;
284			#ifdef CANT_HAPPEN
285			if (*pos == '#')
286			continue;
287			#endif
288			while (pos == ' ' \|\| pos == '\t')
289			pos++;
290			spos = pos;
291			while (pos != ' ' && pos != '\t' && *pos != '\n' &&
292			*pos != '\0')
293			pos++;
294			len = pos - spos;
295			while (pos == ' ' \|\| pos == '\t')
296			pos++;
297			if (pos != '\n' && pos != '\0') {
298			lp = malloc(sizeof(*lp));
299			lp->l_parsed = 0;
300			lp->l_groupname = malloc(len + 1);
301			bcopy(spos, lp->l_groupname, len);
302			*(lp->l_groupname + len) = '\0';
303			len = strlen(pos);
304			olen = 0;
305			/*
306			* Loop around handling line continuations.
307			*/
308			do {
309			if (*(pos + len - 1) == '\n')
310			len--;
311			if (*(pos + len - 1) == '\\') {
312			len--;
313			cont = 1;
314			} else
315			cont = 0;
316			if (len > 0) {
317			linep = malloc(olen + len + 1);
318			if (olen > 0) {
319			bcopy(olinep, linep, olen);
320			free(olinep);
321			}
322			bcopy(pos, linep + olen, len);
323			olen += len;
324			*(linep + olen) = '\0';
325			olinep = linep;
326			}
327			#ifdef CANT_HAPPEN
328			if (cont) {
329			if (fgets(line, sizeof(line), netf)) {
330			pos = line;
331			len = strlen(pos);
332			} else
333			cont = 0;
334			}
335			#endif
336			} while (cont);
337			lp->l_line = linep;
338			lp->l_next = linehead;
339			linehead = lp;
340			#ifdef CANT_HAPPEN
341			/*
342			* If this is the one we wanted, we are done.
343			*/
344			if (!strcmp(lp->l_groupname, group))
345			#endif
346			return (lp);
347			}
348			return (NULL);
349			}