3 * David L. Nugent. All rights reserved.
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 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY DAVID L. NUGENT AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL DAVID L. NUGENT OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * $FreeBSD: src/usr.sbin/pw/edgroup.c,v 1.9 2004/03/08 20:31:37 kensmith Exp $
34 #include <sys/types.h>
39 #include <sys/param.h>
45 isingroup(char const * name, char **mem)
49 for (i = 0; mem[i] != NULL; i++)
50 if (strcmp(name, mem[i]) == 0)
56 editgroups(char *name, char **groups)
60 char groupfile[MAXPATHLEN];
61 char grouptmp[MAXPATHLEN];
63 strncpy(groupfile, getgrpath(_GROUP), MAXPATHLEN - 5);
64 groupfile[MAXPATHLEN - 5] = '\0';
65 strcpy(grouptmp, groupfile);
66 strcat(grouptmp, ".new");
68 if ((infd = open(groupfile, O_RDWR | O_CREAT | O_EXLOCK, 0644)) != -1) {
71 if ((infp = fdopen(infd, "r+")) == NULL)
76 if ((outfd = open(grouptmp, O_RDWR | O_CREAT | O_TRUNC, 0644)) != -1) {
79 if ((outfp = fdopen(outfd, "w+")) == NULL)
82 int linelen = PWBUFSZ;
84 int memlen = 200; /* Arbitrary */
85 char *line = malloc(linelen);
86 char *outl = malloc(outlen);
87 char **mems = malloc(memlen * sizeof(char *));
88 int namlen = strlen(name);
90 if (line == NULL || outl == NULL || mems == NULL) {
94 while (fgets(line, linelen, infp) != NULL) {
98 while ((p = strchr(line, '\n')) == NULL)
100 if (extendline(&line, &linelen, linelen + PWBUFSZ) == -1) {
104 if (fgets(line + l, linelen - l, infp) == NULL)
105 break; /* No newline terminator on last line */
107 l = strlen(line) + namlen + 1;
108 if (extendline(&outl, &outlen, l) == -1) {
113 else if (*line == '\n')
119 char const *sep = ":\n";
122 memset(&grp, 0, sizeof grp);
123 for (i = 0; (p = strsep(&cp, sep)) != NULL; i++) {
125 case 0: /* Group name */
128 case 1: /* Group password */
131 case 2: /* Group id */
132 grp.gr_gid = atoi(p);
134 case 3: /* Member list */
138 default: /* Individual members */
140 if (extendarray(&mems, &memlen, mno + 2) == -1) {
148 if (i < 2) /* Bail out - insufficient fields */
152 for (i = mno; i < memlen; i++)
156 * Delete from group, or add to group?
158 if (groups == NULL || isingroup(grp.gr_name, groups) == -1) { /* Delete */
161 while ((idx = isingroup(name, mems)) != -1) {
162 for (i = idx; i < (memlen - 1); i++)
163 mems[i] = mems[i + 1];
168 * Special case - deleting user and group may be user's own
170 if (groups == NULL && mems[0] == NULL && strcmp(name, grp.gr_name) == 0) {
172 * First, make _sure_ we don't have other members
177 while ((pwd = GETPWENT()) != NULL && (gid_t)pwd->pw_gid != (gid_t)grp.gr_gid);
179 if (pwd == NULL) /* No members at all */
180 continue; /* Drop the group */
182 } else if (isingroup(name, mems) == -1) {
183 if (extendarray(&mems, &memlen, mno + 2) == -1) {
186 grp.gr_mem = mems; /* May have realloced() */
190 fmtgrentry(&outl, &outlen, &grp, PWF_GROUP);
194 if (fflush(outfp) != EOF) {
198 * Copy data back into the original file and truncate
202 while (fgets(outl, outlen, outfp) != NULL)
206 * This is a gross hack, but we may have corrupted the
209 if (fflush(infp) == EOF || ferror(infp))
210 rc = rename(grouptmp, groupfile) == 0;
212 ftruncate(infd, ftell(infp));