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 1.8 1999/08/28 01:19:16 peter Exp $
27 * $DragonFly: src/usr.sbin/pw/edgroup.c,v 1.2 2003/06/17 04:30:01 dillon Exp $
35 #include <sys/types.h>
40 #include <sys/param.h>
46 isingroup(char const * name, char **mem)
50 for (i = 0; mem[i] != NULL; i++)
51 if (strcmp(name, mem[i]) == 0)
57 editgroups(char *name, char **groups)
61 char groupfile[MAXPATHLEN];
62 char grouptmp[MAXPATHLEN];
64 strncpy(groupfile, getgrpath(_GROUP), MAXPATHLEN - 5);
65 groupfile[MAXPATHLEN - 5] = '\0';
66 strcpy(grouptmp, groupfile);
67 strcat(grouptmp, ".new");
69 if ((infd = open(groupfile, O_RDWR | O_CREAT, 0644)) != -1) {
72 if ((infp = fdopen(infd, "r+")) == NULL)
77 if ((outfd = open(grouptmp, O_RDWR | O_CREAT | O_TRUNC | O_EXLOCK, 0644)) != -1) {
80 if ((outfp = fdopen(outfd, "w+")) == NULL)
83 int linelen = PWBUFSZ;
85 int memlen = 200; /* Arbitrary */
86 char *line = malloc(linelen);
87 char *outl = malloc(outlen);
88 char **mems = malloc(memlen * sizeof(char *));
89 int namlen = strlen(name);
91 if (line == NULL || outl == NULL || mems == NULL) {
95 while (fgets(line, linelen, infp) != NULL) {
99 while ((p = strchr(line, '\n')) == NULL)
101 if (extendline(&line, &linelen, linelen + PWBUFSZ) == -1) {
105 if (fgets(line + l, linelen - l, infp) == NULL)
106 break; /* No newline terminator on last line */
108 l = strlen(line) + namlen + 1;
109 if (extendline(&outl, &outlen, l) == -1) {
114 else if (*line == '\n')
120 char const *sep = ":\n";
123 memset(&grp, 0, sizeof grp);
124 for (i = 0; (p = strsep(&cp, sep)) != NULL; i++) {
126 case 0: /* Group name */
129 case 1: /* Group password */
132 case 2: /* Group id */
133 grp.gr_gid = atoi(p);
135 case 3: /* Member list */
139 default: /* Individual members */
141 if (extendarray(&mems, &memlen, mno + 2) == -1) {
149 if (i < 2) /* Bail out - insufficient fields */
153 for (i = mno; i < memlen; i++)
157 * Delete from group, or add to group?
159 if (groups == NULL || isingroup(grp.gr_name, groups) == -1) { /* Delete */
162 while ((idx = isingroup(name, mems)) != -1) {
163 for (i = idx; i < (memlen - 1); i++)
164 mems[i] = mems[i + 1];
169 * Special case - deleting user and group may be user's own
171 if (groups == NULL && mems[0] == NULL && strcmp(name, grp.gr_name) == 0) {
173 * First, make _sure_ we don't have other members
178 while ((pwd = GETPWENT()) != NULL && (gid_t)pwd->pw_gid != (gid_t)grp.gr_gid);
180 if (pwd == NULL) /* No members at all */
181 continue; /* Drop the group */
183 } else if (isingroup(name, mems) == -1) {
184 if (extendarray(&mems, &memlen, mno + 2) == -1) {
187 grp.gr_mem = mems; /* May have realloced() */
191 fmtgrentry(&outl, &outlen, &grp, PWF_GROUP);
195 if (fflush(outfp) != EOF) {
199 * Copy data back into the original file and truncate
203 while (fgets(outl, outlen, outfp) != NULL)
207 * This is a gross hack, but we may have corrupted the
208 * original file. Unfortunately, it will lose preservation
211 if (fflush(infp) == EOF || ferror(infp))
212 rc = rename(grouptmp, groupfile) == 0;
214 ftruncate(infd, ftell(infp));