chkgrp.c (a2c16fbcd05e3b6aae06ec63d49418627ad9ccac) chkgrp.c (83bc6a110657328dea5039ffa37ea447a295cb2d)
1/*-
2 * Copyright (c) 1998 Dag-Erling Co�dan Sm�rgrav
3 * 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 * in this position and unchanged.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. The name of the author may not be used to endorse or promote products
1/*-
2 * Copyright (c) 1998 Dag-Erling Co�dan Sm�rgrav
3 * 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 * in this position and unchanged.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission
15 * derived from this software withough specific prior written permission
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * $Id$
27 */
28
29 */
30
29#include <sys/cdefs.h>
30__FBSDID("$FreeBSD$");
31static const char CVSID[] = "$Id$";
31
32#include <err.h>
33#include <ctype.h>
34#include <stdio.h>
35#include <stdlib.h>
36#include <string.h>
37#include <sysexits.h>
38
32
33#include <err.h>
34#include <ctype.h>
35#include <stdio.h>
36#include <stdlib.h>
37#include <string.h>
38#include <sysexits.h>
39
39static char empty[] = { 0 };
40extern char *__progname;
40
41
41static void
42void
42usage(void)
43{
43usage(void)
44{
44 fprintf(stderr, "usage: chkgrp [groupfile]\n");
45 fprintf(stderr, "usage: %s [groupfile]\n", __progname);
45 exit(EX_USAGE);
46}
47
48int
49main(int argc, char *argv[])
50{
46 exit(EX_USAGE);
47}
48
49int
50main(int argc, char *argv[])
51{
51 unsigned int i;
52 size_t len;
53 int n = 0, k, e = 0;
54 char *line, *f[4], *p;
55 const char *cp, *gfn;
52 unsigned int len;
53 int n = 0, i, k, e = 0;
54 char *gfn, *line, *f[4], *p;
56 FILE *gf;
57
58 /* check arguments */
59 switch (argc) {
60 case 1:
61 gfn = "/etc/group";
62 break;
63 case 2:
64 gfn = argv[1];
65 break;
66 default:
67 gfn = NULL; /* silence compiler */
68 usage();
69 }
70
71 /* open group file */
72 if ((gf = fopen(gfn, "r")) == NULL)
55 FILE *gf;
56
57 /* check arguments */
58 switch (argc) {
59 case 1:
60 gfn = "/etc/group";
61 break;
62 case 2:
63 gfn = argv[1];
64 break;
65 default:
66 gfn = NULL; /* silence compiler */
67 usage();
68 }
69
70 /* open group file */
71 if ((gf = fopen(gfn, "r")) == NULL)
73 err(EX_IOERR, "%s", gfn); /* XXX - is IO_ERR the correct exit code? */
72 err(EX_IOERR, gfn); /* XXX - is IO_ERR the correct exit code? */
74
75 /* check line by line */
76 while (++n) {
77 if ((line = fgetln(gf, &len)) == NULL)
78 break;
73
74 /* check line by line */
75 while (++n) {
76 if ((line = fgetln(gf, &len)) == NULL)
77 break;
79 if (len > 0 && line[len - 1] != '\n') {
80 warnx("%s: line %d: no newline character", gfn, n);
81 e++;
82 }
83 while (len && isspace(line[len-1]))
84 len--;
85
86 /* ignore blank lines and comments */
87 for (p = line; p < (line + len); p++)
88 if (!isspace(*p)) break;
89 if (!len || (*p == '#')) {
90#if 0

--- 10 unchanged lines hidden (view full) ---

101 */
102 for (i = k = 0; k < 4; k++) {
103 for (f[k] = line+i; (i < len) && (line[i] != ':'); i++)
104 /* nothing */ ;
105 if ((k < 3) && (line[i] != ':'))
106 break;
107 line[i++] = 0;
108 }
78 while (len && isspace(line[len-1]))
79 len--;
80
81 /* ignore blank lines and comments */
82 for (p = line; p < (line + len); p++)
83 if (!isspace(*p)) break;
84 if (!len || (*p == '#')) {
85#if 0

--- 10 unchanged lines hidden (view full) ---

96 */
97 for (i = k = 0; k < 4; k++) {
98 for (f[k] = line+i; (i < len) && (line[i] != ':'); i++)
99 /* nothing */ ;
100 if ((k < 3) && (line[i] != ':'))
101 break;
102 line[i++] = 0;
103 }
109
110 if (k < 4) {
111 warnx("%s: line %d: missing field(s)", gfn, n);
112 for ( ; k < 4; k++)
113 f[k] = empty;
114 e++;
115 }
116
117 for (cp = f[0] ; *cp ; cp++) {
118 if (!isalnum(*cp) && *cp != '.' && *cp != '_' && *cp != '-' &&
119 (cp > f[0] || *cp != '+')) {
120 warnx("%s: line %d: '%c' invalid character", gfn, n, *cp);
121 e++;
122 }
104 if (k < 4) {
105 warnx("%s: line %d: missing field(s)", gfn, n);
106 e++;
107 continue;
123 }
124
108 }
109
125 for (cp = f[3] ; *cp ; cp++) {
126 if (!isalnum(*cp) && *cp != '.' && *cp != '_' && *cp != '-' &&
127 *cp != ',') {
128 warnx("%s: line %d: '%c' invalid character", gfn, n, *cp);
129 e++;
130 }
131 }
132
133 /* check if fourth field ended with a colon */
134 if (i < len) {
135 warnx("%s: line %d: too many fields", gfn, n);
136 e++;
110 /* check if fourth field ended with a colon */
111 if (i < len) {
112 warnx("%s: line %d: too many fields", gfn, n);
113 e++;
114 continue;
137 }
138
139 /* check that none of the fields contain whitespace */
115 }
116
117 /* check that none of the fields contain whitespace */
140 for (k = 0; k < 4; k++) {
141 if (strcspn(f[k], " \t") != strlen(f[k])) {
118 for (k = 0; k < 4; k++)
119 if (strcspn(f[k], " \t") != strlen(f[k]))
142 warnx("%s: line %d: field %d contains whitespace",
143 gfn, n, k+1);
120 warnx("%s: line %d: field %d contains whitespace",
121 gfn, n, k+1);
144 e++;
145 }
146 }
147
148 /* check that the GID is numeric */
149 if (strspn(f[2], "0123456789") != strlen(f[2])) {
150 warnx("%s: line %d: GID is not numeric", gfn, n);
151 e++;
122
123 /* check that the GID is numeric */
124 if (strspn(f[2], "0123456789") != strlen(f[2])) {
125 warnx("%s: line %d: GID is not numeric", gfn, n);
126 e++;
127 continue;
152 }
153
154#if 0
155 /* entry is correct, so print it */
156 printf("%s:%s:%s:%s\n", f[0], f[1], f[2], f[3]);
157#endif
158 }
159
160 /* check what broke the loop */
161 if (ferror(gf))
162 err(EX_IOERR, "%s: line %d", gfn, n);
163
164 /* done */
165 fclose(gf);
128 }
129
130#if 0
131 /* entry is correct, so print it */
132 printf("%s:%s:%s:%s\n", f[0], f[1], f[2], f[3]);
133#endif
134 }
135
136 /* check what broke the loop */
137 if (ferror(gf))
138 err(EX_IOERR, "%s: line %d", gfn, n);
139
140 /* done */
141 fclose(gf);
166 if (e == 0)
167 printf("%s is fine\n", gfn);
168 exit(e ? EX_DATAERR : EX_OK);
169}
142 exit(e ? EX_DATAERR : EX_OK);
143}