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  "$FreeBSD$";
31#endif /* not lint */
32
33#include <pwd.h>
34#include <grp.h>
35#include <libutil.h>
36#define _WITH_GETLINE
37#include <stdio.h>
38#include <string.h>
39#include <stdlib.h>
40#include <sys/param.h>
41#include <err.h>
42
43#include "pwupd.h"
44
45static FILE * pwd_fp = NULL;
46
47void
48vendpwent(void)
49{
50	if (pwd_fp != NULL) {
51		fclose(pwd_fp);
52		pwd_fp = NULL;
53	}
54}
55
56void
57vsetpwent(void)
58{
59	vendpwent();
60}
61
62static struct passwd *
63vnextpwent(char const *nam, uid_t uid, int doclose)
64{
65	struct passwd *pw;
66	char *line;
67	size_t linecap;
68	ssize_t linelen;
69
70	pw = NULL;
71	line = NULL;
72	linecap = 0;
73
74	if (pwd_fp != NULL || (pwd_fp = fopen(getpwpath(_MASTERPASSWD), "r")) != NULL) {
75		while ((linelen = getline(&line, &linecap, pwd_fp)) > 0) {
76			/* Skip comments and empty lines */
77			if (*line == '\n' || *line == '#')
78				continue;
79			/* trim latest \n */
80			if (line[linelen - 1 ] == '\n')
81				line[linelen - 1] = '\0';
82			pw = pw_scan(line, PWSCAN_MASTER);
83			if (pw == NULL)
84				errx(EXIT_FAILURE, "Invalid user entry in '%s':"
85				    " '%s'", getpwpath(_MASTERPASSWD), line);
86			if (uid != (uid_t)-1) {
87				if (uid == pw->pw_uid)
88					break;
89			} else if (nam != NULL) {
90				if (strcmp(nam, pw->pw_name) == 0)
91					break;
92			} else
93				break;
94			free(pw);
95			pw = NULL;
96		}
97		if (doclose)
98			vendpwent();
99	}
100	free(line);
101
102	return (pw);
103}
104
105struct passwd *
106vgetpwent(void)
107{
108  return vnextpwent(NULL, -1, 0);
109}
110
111struct passwd *
112vgetpwuid(uid_t uid)
113{
114  return vnextpwent(NULL, uid, 1);
115}
116
117struct passwd *
118vgetpwnam(const char * nam)
119{
120  return vnextpwent(nam, -1, 1);
121}
122
123
124static FILE * grp_fp = NULL;
125
126void
127vendgrent(void)
128{
129	if (grp_fp != NULL) {
130		fclose(grp_fp);
131		grp_fp = NULL;
132	}
133}
134
135RET_SETGRENT
136vsetgrent(void)
137{
138	vendgrent();
139#if defined(__FreeBSD__)
140	return 0;
141#endif
142}
143
144static struct group *
145vnextgrent(char const *nam, gid_t gid, int doclose)
146{
147	struct group *gr;
148	char *line;
149	size_t linecap;
150	ssize_t linelen;
151
152	gr = NULL;
153	line = NULL;
154	linecap = 0;
155
156	if (grp_fp != NULL || (grp_fp = fopen(getgrpath(_GROUP), "r")) != NULL) {
157		while ((linelen = getline(&line, &linecap, grp_fp)) > 0) {
158			/* Skip comments and empty lines */
159			if (*line == '\n' || *line == '#')
160				continue;
161			/* trim latest \n */
162			if (line[linelen - 1 ] == '\n')
163				line[linelen - 1] = '\0';
164			gr = gr_scan(line);
165			if (gr == NULL)
166				errx(EXIT_FAILURE, "Invalid group entry in '%s':"
167				    " '%s'", getgrpath(_GROUP), line);
168			if (gid != (gid_t)-1) {
169				if (gid == gr->gr_gid)
170					break;
171			} else if (nam != NULL) {
172				if (strcmp(nam, gr->gr_name) == 0)
173					break;
174			} else
175				break;
176			free(gr);
177			gr = NULL;
178		}
179		if (doclose)
180			vendgrent();
181	}
182	free(line);
183
184	return (gr);
185}
186
187struct group *
188vgetgrent(void)
189{
190  return vnextgrent(NULL, -1, 0);
191}
192
193
194struct group *
195vgetgrgid(gid_t gid)
196{
197  return vnextgrent(NULL, gid, 1);
198}
199
200struct group *
201vgetgrnam(const char * nam)
202{
203  return vnextgrent(nam, -1, 1);
204}
205
206