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("$FreeBSD$");
39 static char empty[] = { 0 };
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 if (len > 0 && line[len - 1] != '\n') {
80 warnx("%s: line %d: no newline character", gfn, n);
83 while (len && isspace(line[len-1]))
86 /* ignore blank lines and comments */
87 for (p = line; p < (line + len); p++)
88 if (!isspace(*p)) break;
89 if (!len || (*p == '#')) {
91 /* entry is correct, so print it */
92 printf("%*.*s\n", len, len, line);
98 * A correct group entry has four colon-separated fields, the third
99 * of which must be entirely numeric and the fourth of which may
102 for (i = k = 0; k < 4; k++) {
103 for (f[k] = line+i; (i < len) && (line[i] != ':'); i++)
105 if ((k < 3) && (line[i] != ':'))
111 warnx("%s: line %d: missing field(s)", gfn, n);
117 for (cp = f[0] ; *cp ; cp++) {
118 if (!isalnum(*cp) && *cp != '.' && *cp != '_' && *cp != '-' &&
119 (cp > f[0] || *cp != '+')) {
120 warnx("%s: line %d: '%c' invalid character", gfn, n, *cp);
125 for (cp = f[3] ; *cp ; cp++) {
126 if (!isalnum(*cp) && *cp != '.' && *cp != '_' && *cp != '-' &&
128 warnx("%s: line %d: '%c' invalid character", gfn, n, *cp);
133 /* check if fourth field ended with a colon */
135 warnx("%s: line %d: too many fields", gfn, n);
139 /* check that none of the fields contain whitespace */
140 for (k = 0; k < 4; k++) {
141 if (strcspn(f[k], " \t") != strlen(f[k])) {
142 warnx("%s: line %d: field %d contains whitespace",
148 /* check that the GID is numeric */
149 if (strspn(f[2], "0123456789") != strlen(f[2])) {
150 warnx("%s: line %d: GID is not numeric", gfn, n);
155 /* entry is correct, so print it */
156 printf("%s:%s:%s:%s\n", f[0], f[1], f[2], f[3]);
160 /* check what broke the loop */
162 err(EX_IOERR, "%s: line %d", gfn, n);
167 printf("%s is fine\n", gfn);
168 exit(e ? EX_DATAERR : EX_OK);