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.
28 * $FreeBSD: src/usr.sbin/chkgrp/chkgrp.c,v 1.3.2.2 2001/07/12 22:57:35 mjacob Exp $
29 * $DragonFly: src/usr.sbin/chkgrp/chkgrp.c,v 1.3 2005/04/24 14:36:55 liamfoy Exp $
31 #include <sys/types.h>
39 #define DEFAULTGFILE "/etc/group"
41 static void usage(void);
46 fprintf(stderr, "usage: chkgrp [groupfile]\n");
51 main(int argc, char *argv[])
54 int n = 0, i, k, e = 0;
55 char *line, *f[4], *p;
68 gfn = NULL; /* silence compiler */
73 if ((gf = fopen(gfn, "r")) == NULL)
74 err(EX_IOERR, "%s", gfn);
76 /* check line by line */
78 if ((line = fgetln(gf, &len)) == NULL)
80 if (len > 0 && line[len - 1] != '\n') {
81 warnx("%s: line %d: no newline character", gfn, n);
84 while (len && isspace(line[len - 1]))
87 /* ignore blank lines and comments */
88 for (p = line; p < (line + len); p++)
91 if (!len || (*p == '#')) {
93 /* entry is correct, so print it */
94 printf("%*.*s\n", len, len, line);
99 * A correct group entry has four colon-separated fields, the
100 * third of which must be entirely numeric and the fourth of
101 * which may be empty. We also check for any incorrect characters.
103 for (i = k = 0; k < 4; k++) {
104 for (f[k] = line + i; (i < (int)len) && (line[i] != ':'); i++)
106 if ((k < 3) && (line[i] != ':'))
111 for (cp = f[0] ; *cp ; cp++) {
112 if (!isalnum(*cp) && *cp != '.' && *cp != '_' && *cp != '-') {
113 warnx("%s: line %d: '%c' invalid character", gfn, n, *cp);
118 for (cp = f[3] ; *cp ; cp++) {
119 if (!isalnum(*cp) && *cp != ',' && *cp != '.' && *cp != '_' && *cp != '-') {
120 warnx("%s: line %d: '%c' invalid character", gfn, n, *cp);
126 warnx("%s: line %d: missing field(s)", gfn, n);
130 /* check if fourth field ended with a colon */
132 warnx("%s: line %d: too many fields", gfn, n);
135 /* check that none of the fields contain whitespace */
136 for (k = 0; k < 4; k++) {
137 if (strcspn(f[k], " \t") != strlen(f[k])) {
138 warnx("%s: line %d: field %d contains whitespace",
144 /* check that the GID is numeric */
145 if (strspn(f[2], "0123456789") != strlen(f[2])) {
146 warnx("%s: line %d: GID is not numeric", gfn, n);
150 /* entry is correct, so print it */
151 printf("%s:%s:%s:%s\n", f[0], f[1], f[2], f[3]);
155 /* check what broke the loop */
157 err(EX_IOERR, "%s: line %d", gfn, n);
162 printf("%s is fine\n", gfn);
163 exit(e ? EX_DATAERR : EX_OK);