2 * Copyright (c) 1998 Dag-Erling Coïdan Smørgrav
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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
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.
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
43 static char empty[] = { 0 };
48 fprintf(stderr, "usage: chkgrp [groupfile]\n");
53 main(int argc, char *argv[])
60 char *line, *f[4], *p;
65 while ((ch = getopt(argc, argv, "q")) != -1) {
78 else if (optind == argc - 1)
84 if ((gf = fopen(gfn, "r")) == NULL)
85 err(EX_NOINPUT, "%s", gfn);
87 /* check line by line */
89 if ((line = fgetln(gf, &len)) == NULL)
91 if (len > 0 && line[len - 1] != '\n') {
92 warnx("%s: line %d: no newline character", gfn, n);
95 while (len && isspace(line[len-1]))
98 /* ignore blank lines and comments */
99 for (p = line; p < (line + len); p++)
100 if (!isspace(*p)) break;
101 if (!len || (*p == '#')) {
103 /* entry is correct, so print it */
104 printf("%*.*s\n", len, len, line);
110 * A correct group entry has four colon-separated fields, the third
111 * of which must be entirely numeric and the fourth of which may
114 for (i = k = 0; k < 4; k++) {
115 for (f[k] = line+i; (i < len) && (line[i] != ':'); i++)
117 if ((k < 3) && (line[i] != ':'))
123 warnx("%s: line %d: missing field(s)", gfn, n);
129 for (cp = f[0] ; *cp ; cp++) {
130 if (!isalnum(*cp) && *cp != '.' && *cp != '_' && *cp != '-' &&
131 (cp > f[0] || *cp != '+')) {
132 warnx("%s: line %d: '%c' invalid character", gfn, n, *cp);
137 for (cp = f[3] ; *cp ; cp++) {
138 if (!isalnum(*cp) && *cp != '.' && *cp != '_' && *cp != '-' &&
140 warnx("%s: line %d: '%c' invalid character", gfn, n, *cp);
145 /* check if fourth field ended with a colon */
147 warnx("%s: line %d: too many fields", gfn, n);
151 /* check that none of the fields contain whitespace */
152 for (k = 0; k < 4; k++) {
153 if (strcspn(f[k], " \t") != strlen(f[k])) {
154 warnx("%s: line %d: field %d contains whitespace",
160 /* check that the GID is numeric */
161 if (strspn(f[2], "0123456789") != strlen(f[2])) {
162 warnx("%s: line %d: GID is not numeric", gfn, n);
166 /* check the range of the group id */
168 unsigned long groupid = strtoul(f[2], NULL, 10);
170 warnx("%s: line %d: strtoul failed", gfn, n);
172 else if (groupid > GID_MAX) {
173 warnx("%s: line %d: group id is too large (> %ju)",
174 gfn, n, (uintmax_t)GID_MAX);
179 /* entry is correct, so print it */
180 printf("%s:%s:%s:%s\n", f[0], f[1], f[2], f[3]);
184 /* check what broke the loop */
186 err(EX_IOERR, "%s: line %d", gfn, n);
190 if (e == 0 && quiet == 0)
191 printf("%s is fine\n", gfn);
192 exit(e ? EX_DATAERR : EX_OK);