pw_vpw.c revision 44229 
1/*-
2 * Copyright (C) 1996
3 *	David L. Nugent.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY DAVID L. NUGENT AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL DAVID L. NUGENT OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 */
27
28#ifndef lint
29static const char rcsid[] =
30	"$Id$";
31#endif /* not lint */
32
33#include <stdio.h>
34#include <string.h>
35#include <stdlib.h>
36#include <sys/param.h>
37
38#include "pwupd.h"
39
40static FILE * pwd_fp = NULL;
41
42void
43vendpwent(void)
44{
45	if (pwd_fp != NULL) {
46		fclose(pwd_fp);
47		pwd_fp = NULL;
48	}
49}
50
51void
52vsetpwent(void)
53{
54	vendpwent();
55}
56
57static struct passwd *
58vnextpwent(char const * nam, uid_t uid, int doclose)
59{
60	struct passwd * pw = NULL;
61	static char pwtmp[1024];
62
63        strncpy(pwtmp, getpwpath(_MASTERPASSWD), sizeof pwtmp);
64        pwtmp[sizeof pwtmp - 1] = '\0';
65
66        if (pwd_fp != NULL || (pwd_fp = fopen(pwtmp, "r")) != NULL) {
67                int done = 0;
68
69                static struct passwd pwd;
70
71                while (!done && fgets(pwtmp, sizeof pwtmp, pwd_fp) != NULL)
72                {
73                        int i, quickout = 0;
74                        char * q;
75                        char * p = strchr(pwtmp, '\n');
76
77                        if (p == NULL) {
78		  		while (fgets(pwtmp, sizeof pwtmp, pwd_fp) != NULL && strchr(pwtmp, '\n')==NULL)
79		  			; /* Skip long lines */
80		  		continue;
81                        }
82
83			/* skip comments & empty lines */
84	       		if (*pwtmp =='\n' || *pwtmp == '#')
85				continue;
86
87                        i = 0;
88                        q = p = pwtmp;
89                        bzero(&pwd, sizeof pwd);
90                        while (!quickout && (p = strsep(&q, ":\n")) != NULL) {
91                          	switch (i++)
92                          	{
93                                case 0:   /* username */
94        				pwd.pw_name = p;
95        				if (nam) {
96        					if (strcmp(nam, p) == 0)
97        						done = 1;
98        					else
99        						quickout = 1;
100        				}
101        				break;
102                                case 1:   /* password */
103        				pwd.pw_passwd = p;
104        				break;
105                                case 2:   /* uid */
106        				pwd.pw_uid = atoi(p);
107        				if (uid != (uid_t)-1) {
108        					if (uid == pwd.pw_uid)
109        						done = 1;
110        					else
111        						quickout = 1;
112        				}
113        				break;
114                                case 3:   /* gid */
115        				pwd.pw_gid = atoi(p);
116        				break;
117                                case 4:   /* class */
118					if (nam == NULL && uid == (uid_t)-1)
119						done = 1;
120        				pwd.pw_class = p;
121        				break;
122                                case 5:   /* change */
123        				pwd.pw_change = (time_t)atol(p);
124        				break;
125                                case 6:   /* expire */
126        				pwd.pw_expire = (time_t)atol(p);
127        				break;
128                                case 7:   /* gecos */
129        				pwd.pw_gecos = p;
130        				break;
131                                case 8:   /* directory */
132        				pwd.pw_dir = p;
133        				break;
134                                case 9:   /* shell */
135        				pwd.pw_shell = p;
136        				break;
137                                }
138        		}
139                }
140		if (doclose)
141			vendpwent();
142		if (done && pwd.pw_name) {
143			pw = &pwd;
144
145			#define CKNULL(s)   s = s ? s : ""
146			CKNULL(pwd.pw_passwd);
147			CKNULL(pwd.pw_class);
148			CKNULL(pwd.pw_gecos);
149			CKNULL(pwd.pw_dir);
150			CKNULL(pwd.pw_shell);
151                }
152        }
153        return pw;
154}
155
156struct passwd *
157vgetpwent(void)
158{
159  return vnextpwent(NULL, -1, 0);
160}
161
162struct passwd *
163vgetpwuid(uid_t uid)
164{
165  return vnextpwent(NULL, uid, 1);
166}
167
168struct passwd *
169vgetpwnam(const char * nam)
170{
171  return vnextpwent(nam, -1, 1);
172}
173
174int vpwdb(char *arg, ...)
175{
176  arg=arg;
177  return 0;
178}
179
180
181
182static FILE * grp_fp = NULL;
183
184void
185vendgrent(void)
186{
187	if (grp_fp != NULL) {
188		fclose(grp_fp);
189		grp_fp = NULL;
190	}
191}
192
193int
194vsetgrent(void)
195{
196	vendgrent();
197	return 0;
198}
199
200static struct group *
201vnextgrent(char const * nam, gid_t gid, int doclose)
202{
203	struct group * gr = NULL;
204
205	static char * grtmp = NULL;
206	static int grlen = 0;
207	static char ** mems = NULL;
208	static int memlen = 0;
209
210	extendline(&grtmp, &grlen, MAXPATHLEN);
211	strncpy(grtmp, getgrpath(_GROUP), MAXPATHLEN);
212	grtmp[MAXPATHLEN - 1] = '\0';
213
214	if (grp_fp != NULL || (grp_fp = fopen(grtmp, "r")) != NULL) {
215		int done = 0;
216
217		static struct group grp;
218
219		while (!done && fgets(grtmp, grlen, grp_fp) != NULL)
220		{
221			int i, quickout = 0;
222			int mno = 0;
223			char * q, * p;
224			char * sep = ":\n";
225
226			if ((p = strchr(grtmp, '\n')) == NULL) {
227				int l;
228				extendline(&grtmp, &grlen, grlen + PWBUFSZ);
229				l = strlen(grtmp);
230				if (fgets(grtmp + l, grlen - l, grp_fp) == NULL)
231				  break;	/* No newline terminator on last line */
232			}
233			/* Skip comments and empty lines */
234			if (*grtmp == '\n' || *grtmp == '#')
235				continue;
236			i = 0;
237			q = p = grtmp;
238			bzero(&grp, sizeof grp);
239			extendarray(&mems, &memlen, 200);
240			while (!quickout && (p = strsep(&q, sep)) != NULL) {
241				switch (i++)
242				{
243				case 0:   /* groupname */
244					grp.gr_name = p;
245					if (nam) {
246						if (strcmp(nam, p) == 0)
247							done = 1;
248						else
249							quickout = 1;
250					}
251					break;
252				case 1:   /* password */
253					grp.gr_passwd = p;
254					break;
255				case 2:   /* gid */
256					grp.gr_gid = atoi(p);
257					if (gid != (gid_t)-1) {
258						if (gid == (gid_t)grp.gr_gid)
259							done = 1;
260						else
261							quickout = 1;
262					} else if (nam == NULL)
263						done = 1;
264					break;
265				case 3:
266					q = p;
267					sep = ",\n";
268					break;
269				default:
270					if (*p) {
271						extendarray(&mems, &memlen, mno + 2);
272						mems[mno++] = p;
273					}
274					break;
275				}
276			}
277			grp.gr_mem = mems;
278			mems[mno] = NULL;
279                }
280		if (doclose)
281			vendgrent();
282		if (done && grp.gr_name) {
283			gr = &grp;
284
285			CKNULL(grp.gr_passwd);
286		}
287	}
288	return gr;
289}
290
291struct group *
292vgetgrent(void)
293{
294  return vnextgrent(NULL, -1, 0);
295}
296
297
298struct group *
299vgetgrgid(gid_t gid)
300{
301  return vnextgrent(NULL, gid, 1);
302}
303
304struct group *
305vgetgrnam(const char * nam)
306{
307  return vnextgrent(nam, -1, 1);
308}
309
310int
311vgrdb(char *arg, ...)
312{
313  arg=arg;
314  return 0;
315}
316
317