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[] =
43 fprintf(stderr, "usage: chkgrp [groupfile]\n");
48 main(int argc, char *argv[])
51 int n = 0, i, k, e = 0;
52 char *gfn, *line, *f[4], *p;
64 gfn = NULL; /* silence compiler */
69 if ((gf = fopen(gfn, "r")) == NULL)
70 err(EX_IOERR, "%s", gfn); /* XXX - is IO_ERR the correct exit code? */
72 /* check line by line */
74 if ((line = fgetln(gf, &len)) == NULL)
76 while (len && isspace(line[len-1]))
79 /* ignore blank lines and comments */
80 for (p = line; p < (line + len); p++)
81 if (!isspace(*p)) break;
82 if (!len || (*p == '#')) {
84 /* entry is correct, so print it */
85 printf("%*.*s\n", len, len, line);
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
95 for (i = k = 0; k < 4; k++) {
96 for (f[k] = line+i; (i < len) && (line[i] != ':'); i++)
98 if ((k < 3) && (line[i] != ':'))
103 warnx("%s: line %d: missing field(s)", gfn, n);
108 /* check if fourth field ended with a colon */
110 warnx("%s: line %d: too many fields", gfn, n);
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",
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);
129 /* entry is correct, so print it */
130 printf("%s:%s:%s:%s\n", f[0], f[1], f[2], f[3]);
134 /* check what broke the loop */
136 err(EX_IOERR, "%s: line %d", gfn, n);
140 exit(e ? EX_DATAERR : EX_OK);