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
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
29#ifndef lint
30static const char rcsid[] =
| 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
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
29#ifndef lint
30static const char rcsid[] =
|
31 "$FreeBSD: head/usr.sbin/chkgrp/chkgrp.c 50479 1999-08-28 01:35:59Z peter $";
| 31 "$FreeBSD: head/usr.sbin/chkgrp/chkgrp.c 61019 2000-05-28 14:57:49Z charnier $";
|
32#endif /* not lint */
33
34#include <err.h>
35#include <ctype.h>
36#include <stdio.h>
37#include <string.h>
38#include <sysexits.h>
39
40void
41usage(void)
42{
43 fprintf(stderr, "usage: chkgrp [groupfile]\n");
44 exit(EX_USAGE);
45}
46
47int
48main(int argc, char *argv[])
49{
50 unsigned int len;
51 int n = 0, i, k, e = 0;
52 char *gfn, *line, *f[4], *p;
53 FILE *gf;
54
55 /* check arguments */
56 switch (argc) {
57 case 1:
58 gfn = "/etc/group";
59 break;
60 case 2:
61 gfn = argv[1];
62 break;
63 default:
64 gfn = NULL; /* silence compiler */
65 usage();
66 }
67
68 /* open group file */
69 if ((gf = fopen(gfn, "r")) == NULL)
| 32#endif /* not lint */
33
34#include <err.h>
35#include <ctype.h>
36#include <stdio.h>
37#include <string.h>
38#include <sysexits.h>
39
40void
41usage(void)
42{
43 fprintf(stderr, "usage: chkgrp [groupfile]\n");
44 exit(EX_USAGE);
45}
46
47int
48main(int argc, char *argv[])
49{
50 unsigned int len;
51 int n = 0, i, k, e = 0;
52 char *gfn, *line, *f[4], *p;
53 FILE *gf;
54
55 /* check arguments */
56 switch (argc) {
57 case 1:
58 gfn = "/etc/group";
59 break;
60 case 2:
61 gfn = argv[1];
62 break;
63 default:
64 gfn = NULL; /* silence compiler */
65 usage();
66 }
67
68 /* open group file */
69 if ((gf = fopen(gfn, "r")) == NULL)
|
70 err(EX_IOERR, gfn); /* XXX - is IO_ERR the correct exit code? */
| 70 err(EX_IOERR, "%s", gfn); /* XXX - is IO_ERR the correct exit code? */
|
71
72 /* check line by line */
73 while (++n) {
74 if ((line = fgetln(gf, &len)) == NULL)
75 break;
76 while (len && isspace(line[len-1]))
77 len--;
78
79 /* ignore blank lines and comments */
80 for (p = line; p < (line + len); p++)
81 if (!isspace(*p)) break;
82 if (!len || (*p == '#')) {
83#if 0
84 /* entry is correct, so print it */
85 printf("%*.*s\n", len, len, line);
86#endif
87 continue;
88 }
89
90 /*
91 * A correct group entry has four colon-separated fields, the third
92 * of which must be entirely numeric and the fourth of which may
93 * be empty.
94 */
95 for (i = k = 0; k < 4; k++) {
96 for (f[k] = line+i; (i < len) && (line[i] != ':'); i++)
97 /* nothing */ ;
98 if ((k < 3) && (line[i] != ':'))
99 break;
100 line[i++] = 0;
101 }
102 if (k < 4) {
103 warnx("%s: line %d: missing field(s)", gfn, n);
104 e++;
105 continue;
106 }
107
108 /* check if fourth field ended with a colon */
109 if (i < len) {
110 warnx("%s: line %d: too many fields", gfn, n);
111 e++;
112 continue;
113 }
114
115 /* check that none of the fields contain whitespace */
116 for (k = 0; k < 4; k++)
117 if (strcspn(f[k], " \t") != strlen(f[k]))
118 warnx("%s: line %d: field %d contains whitespace",
119 gfn, n, k+1);
120
121 /* check that the GID is numeric */
122 if (strspn(f[2], "0123456789") != strlen(f[2])) {
123 warnx("%s: line %d: GID is not numeric", gfn, n);
124 e++;
125 continue;
126 }
127
128#if 0
129 /* entry is correct, so print it */
130 printf("%s:%s:%s:%s\n", f[0], f[1], f[2], f[3]);
131#endif
132 }
133
134 /* check what broke the loop */
135 if (ferror(gf))
136 err(EX_IOERR, "%s: line %d", gfn, n);
137
138 /* done */
139 fclose(gf);
140 exit(e ? EX_DATAERR : EX_OK);
141}
| 71
72 /* check line by line */
73 while (++n) {
74 if ((line = fgetln(gf, &len)) == NULL)
75 break;
76 while (len && isspace(line[len-1]))
77 len--;
78
79 /* ignore blank lines and comments */
80 for (p = line; p < (line + len); p++)
81 if (!isspace(*p)) break;
82 if (!len || (*p == '#')) {
83#if 0
84 /* entry is correct, so print it */
85 printf("%*.*s\n", len, len, line);
86#endif
87 continue;
88 }
89
90 /*
91 * A correct group entry has four colon-separated fields, the third
92 * of which must be entirely numeric and the fourth of which may
93 * be empty.
94 */
95 for (i = k = 0; k < 4; k++) {
96 for (f[k] = line+i; (i < len) && (line[i] != ':'); i++)
97 /* nothing */ ;
98 if ((k < 3) && (line[i] != ':'))
99 break;
100 line[i++] = 0;
101 }
102 if (k < 4) {
103 warnx("%s: line %d: missing field(s)", gfn, n);
104 e++;
105 continue;
106 }
107
108 /* check if fourth field ended with a colon */
109 if (i < len) {
110 warnx("%s: line %d: too many fields", gfn, n);
111 e++;
112 continue;
113 }
114
115 /* check that none of the fields contain whitespace */
116 for (k = 0; k < 4; k++)
117 if (strcspn(f[k], " \t") != strlen(f[k]))
118 warnx("%s: line %d: field %d contains whitespace",
119 gfn, n, k+1);
120
121 /* check that the GID is numeric */
122 if (strspn(f[2], "0123456789") != strlen(f[2])) {
123 warnx("%s: line %d: GID is not numeric", gfn, n);
124 e++;
125 continue;
126 }
127
128#if 0
129 /* entry is correct, so print it */
130 printf("%s:%s:%s:%s\n", f[0], f[1], f[2], f[3]);
131#endif
132 }
133
134 /* check what broke the loop */
135 if (ferror(gf))
136 err(EX_IOERR, "%s: line %d", gfn, n);
137
138 /* done */
139 fclose(gf);
140 exit(e ? EX_DATAERR : EX_OK);
141}
|