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.
30 static const char rcsid[] =
44 fprintf(stderr, "usage: chkgrp [groupfile]\n");
49 main(int argc, char *argv[])
54 char *line, *f[4], *p;
67 gfn = NULL; /* silence compiler */
72 if ((gf = fopen(gfn, "r")) == NULL)
73 err(EX_IOERR, "%s", gfn); /* XXX - is IO_ERR the correct exit code? */
75 /* check line by line */
77 if ((line = fgetln(gf, &len)) == NULL)
79 while (len && isspace(line[len-1]))
82 /* ignore blank lines and comments */
83 for (p = line; p < (line + len); p++)
84 if (!isspace(*p)) break;
85 if (!len || (*p == '#')) {
87 /* entry is correct, so print it */
88 printf("%*.*s\n", len, len, line);
94 * A correct group entry has four colon-separated fields, the third
95 * of which must be entirely numeric and the fourth of which may
98 for (i = k = 0; k < 4; k++) {
99 for (f[k] = line+i; (i < len) && (line[i] != ':'); i++)
101 if ((k < 3) && (line[i] != ':'))
106 warnx("%s: line %d: missing field(s)", gfn, n);
111 /* check if fourth field ended with a colon */
113 warnx("%s: line %d: too many fields", gfn, n);
118 /* check that none of the fields contain whitespace */
119 for (k = 0; k < 4; k++)
120 if (strcspn(f[k], " \t") != strlen(f[k]))
121 warnx("%s: line %d: field %d contains whitespace",
124 /* check that the GID is numeric */
125 if (strspn(f[2], "0123456789") != strlen(f[2])) {
126 warnx("%s: line %d: GID is not numeric", gfn, n);
132 /* entry is correct, so print it */
133 printf("%s:%s:%s:%s\n", f[0], f[1], f[2], f[3]);
137 /* check what broke the loop */
139 err(EX_IOERR, "%s: line %d", gfn, n);
143 exit(e ? EX_DATAERR : EX_OK);