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 1.2 2003/06/17 04:29:52 dillon Exp $
41 fprintf(stderr, "usage: chkgrp [groupfile]\n");
46 main(int argc, char *argv[])
49 int n = 0, i, k, e = 0;
50 char *gfn, *line, *f[4], *p;
62 gfn = NULL; /* silence compiler */
67 if ((gf = fopen(gfn, "r")) == NULL)
68 err(EX_IOERR, "%s", gfn); /* XXX - is IO_ERR the correct exit code? */
70 /* check line by line */
72 if ((line = fgetln(gf, &len)) == NULL)
74 while (len && isspace(line[len-1]))
77 /* ignore blank lines and comments */
78 for (p = line; p < (line + len); p++)
79 if (!isspace(*p)) break;
80 if (!len || (*p == '#')) {
82 /* entry is correct, so print it */
83 printf("%*.*s\n", len, len, line);
89 * A correct group entry has four colon-separated fields, the third
90 * of which must be entirely numeric and the fourth of which may
93 for (i = k = 0; k < 4; k++) {
94 for (f[k] = line+i; (i < len) && (line[i] != ':'); i++)
96 if ((k < 3) && (line[i] != ':'))
101 warnx("%s: line %d: missing field(s)", gfn, n);
106 /* check if fourth field ended with a colon */
108 warnx("%s: line %d: too many fields", gfn, n);
113 /* check that none of the fields contain whitespace */
114 for (k = 0; k < 4; k++)
115 if (strcspn(f[k], " \t") != strlen(f[k]))
116 warnx("%s: line %d: field %d contains whitespace",
119 /* check that the GID is numeric */
120 if (strspn(f[2], "0123456789") != strlen(f[2])) {
121 warnx("%s: line %d: GID is not numeric", gfn, n);
127 /* entry is correct, so print it */
128 printf("%s:%s:%s:%s\n", f[0], f[1], f[2], f[3]);
132 /* check what broke the loop */
134 err(EX_IOERR, "%s: line %d", gfn, n);
138 exit(e ? EX_DATAERR : EX_OK);