1*0Sstevel@tonic-gate /*
2*0Sstevel@tonic-gate * CDDL HEADER START
3*0Sstevel@tonic-gate *
4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the
5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only
6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance
7*0Sstevel@tonic-gate * with the License.
8*0Sstevel@tonic-gate *
9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing.
11*0Sstevel@tonic-gate * See the License for the specific language governing permissions
12*0Sstevel@tonic-gate * and limitations under the License.
13*0Sstevel@tonic-gate *
14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each
15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the
17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying
18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner]
19*0Sstevel@tonic-gate *
20*0Sstevel@tonic-gate * CDDL HEADER END
21*0Sstevel@tonic-gate */
22*0Sstevel@tonic-gate /*
23*0Sstevel@tonic-gate * Copyright 2005 Sun Microsystems, Inc. All rights reserved.
24*0Sstevel@tonic-gate * Use is subject to license terms.
25*0Sstevel@tonic-gate */
26*0Sstevel@tonic-gate /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
27*0Sstevel@tonic-gate /* All Rights Reserved */
28*0Sstevel@tonic-gate
29*0Sstevel@tonic-gate
30*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI"
31*0Sstevel@tonic-gate
32*0Sstevel@tonic-gate #include <sys/types.h>
33*0Sstevel@tonic-gate #include <stdio.h>
34*0Sstevel@tonic-gate #include <stdlib.h>
35*0Sstevel@tonic-gate #include <string.h>
36*0Sstevel@tonic-gate #include <ctype.h>
37*0Sstevel@tonic-gate #include <sys/stat.h>
38*0Sstevel@tonic-gate #include <grp.h>
39*0Sstevel@tonic-gate #include <unistd.h>
40*0Sstevel@tonic-gate #include <userdefs.h>
41*0Sstevel@tonic-gate #include <errno.h>
42*0Sstevel@tonic-gate #include <limits.h>
43*0Sstevel@tonic-gate #include "users.h"
44*0Sstevel@tonic-gate #include "messages.h"
45*0Sstevel@tonic-gate
46*0Sstevel@tonic-gate #define MYBUFSIZE (LINE_MAX)
47*0Sstevel@tonic-gate /* Corresponds to MYBUFSIZE in grpck.c, BUFCONST in nss_dbdefs.c */
48*0Sstevel@tonic-gate
49*0Sstevel@tonic-gate int
edit_group(char * login,char * new_login,gid_t gids[],int overwrite)50*0Sstevel@tonic-gate edit_group(char *login, char *new_login, gid_t gids[], int overwrite)
51*0Sstevel@tonic-gate {
52*0Sstevel@tonic-gate char **memptr;
53*0Sstevel@tonic-gate char t_name[] = "/etc/gtmp.XXXXXX";
54*0Sstevel@tonic-gate int fd;
55*0Sstevel@tonic-gate FILE *e_fptr, *t_fptr;
56*0Sstevel@tonic-gate struct group *g_ptr; /* group structure from fgetgrent */
57*0Sstevel@tonic-gate int i;
58*0Sstevel@tonic-gate int modified = 0;
59*0Sstevel@tonic-gate struct stat sbuf;
60*0Sstevel@tonic-gate
61*0Sstevel@tonic-gate int bufsize, g_length, sav_errno;
62*0Sstevel@tonic-gate long g_curr = 0L;
63*0Sstevel@tonic-gate char *g_string, *new_g_string, *gstr_off;
64*0Sstevel@tonic-gate
65*0Sstevel@tonic-gate if ((e_fptr = fopen(GROUP, "r")) == NULL)
66*0Sstevel@tonic-gate return (EX_UPDATE);
67*0Sstevel@tonic-gate
68*0Sstevel@tonic-gate if (fstat(fileno(e_fptr), &sbuf) != 0) {
69*0Sstevel@tonic-gate (void) fclose(e_fptr);
70*0Sstevel@tonic-gate return (EX_UPDATE);
71*0Sstevel@tonic-gate }
72*0Sstevel@tonic-gate
73*0Sstevel@tonic-gate if ((fd = mkstemp(t_name)) == -1) {
74*0Sstevel@tonic-gate (void) fclose(e_fptr);
75*0Sstevel@tonic-gate return (EX_UPDATE);
76*0Sstevel@tonic-gate }
77*0Sstevel@tonic-gate
78*0Sstevel@tonic-gate if ((t_fptr = fdopen(fd, "w")) == NULL) {
79*0Sstevel@tonic-gate (void) close(fd);
80*0Sstevel@tonic-gate (void) unlink(t_name);
81*0Sstevel@tonic-gate (void) fclose(e_fptr);
82*0Sstevel@tonic-gate return (EX_UPDATE);
83*0Sstevel@tonic-gate }
84*0Sstevel@tonic-gate
85*0Sstevel@tonic-gate /*
86*0Sstevel@tonic-gate * Get ownership and permissions correct
87*0Sstevel@tonic-gate */
88*0Sstevel@tonic-gate
89*0Sstevel@tonic-gate if (fchmod(fd, sbuf.st_mode) != 0 ||
90*0Sstevel@tonic-gate fchown(fd, sbuf.st_uid, sbuf.st_gid) != 0) {
91*0Sstevel@tonic-gate (void) fclose(t_fptr);
92*0Sstevel@tonic-gate (void) fclose(e_fptr);
93*0Sstevel@tonic-gate (void) unlink(t_name);
94*0Sstevel@tonic-gate return (EX_UPDATE);
95*0Sstevel@tonic-gate }
96*0Sstevel@tonic-gate
97*0Sstevel@tonic-gate g_curr = ftell(e_fptr);
98*0Sstevel@tonic-gate
99*0Sstevel@tonic-gate /* Make TMP file look like we want GROUP file to look */
100*0Sstevel@tonic-gate
101*0Sstevel@tonic-gate bufsize = MYBUFSIZE;
102*0Sstevel@tonic-gate if ((g_string = malloc(bufsize)) == NULL) {
103*0Sstevel@tonic-gate (void) fclose(t_fptr);
104*0Sstevel@tonic-gate (void) fclose(e_fptr);
105*0Sstevel@tonic-gate (void) unlink(t_name);
106*0Sstevel@tonic-gate return (EX_UPDATE);
107*0Sstevel@tonic-gate }
108*0Sstevel@tonic-gate /*
109*0Sstevel@tonic-gate * bufsize contains the size of the currently allocated buffer
110*0Sstevel@tonic-gate * buffer size, which is initially MYBUFSIZE but when a line
111*0Sstevel@tonic-gate * greater than MYBUFSIZE is encountered then bufsize gets increased
112*0Sstevel@tonic-gate * by MYBUFSIZE.
113*0Sstevel@tonic-gate * g_string always points to the beginning of the buffer (even after
114*0Sstevel@tonic-gate * realloc()).
115*0Sstevel@tonic-gate * gstr_off = g_string + MYBUFSIZE * (n), where n >= 0.
116*0Sstevel@tonic-gate */
117*0Sstevel@tonic-gate while (!feof(e_fptr) && !ferror(e_fptr)) {
118*0Sstevel@tonic-gate g_length = 0;
119*0Sstevel@tonic-gate gstr_off = g_string;
120*0Sstevel@tonic-gate while (fgets(gstr_off, (bufsize - g_length), e_fptr) != NULL) {
121*0Sstevel@tonic-gate g_length += strlen(gstr_off);
122*0Sstevel@tonic-gate if (g_string[g_length - 1] == '\n' || feof(e_fptr))
123*0Sstevel@tonic-gate break;
124*0Sstevel@tonic-gate new_g_string = realloc(g_string, (bufsize + MYBUFSIZE));
125*0Sstevel@tonic-gate if (new_g_string == NULL) {
126*0Sstevel@tonic-gate free(g_string);
127*0Sstevel@tonic-gate (void) fclose(t_fptr);
128*0Sstevel@tonic-gate (void) fclose(e_fptr);
129*0Sstevel@tonic-gate (void) unlink(t_name);
130*0Sstevel@tonic-gate return (EX_UPDATE);
131*0Sstevel@tonic-gate }
132*0Sstevel@tonic-gate bufsize += MYBUFSIZE;
133*0Sstevel@tonic-gate g_string = new_g_string;
134*0Sstevel@tonic-gate gstr_off = g_string + g_length;
135*0Sstevel@tonic-gate }
136*0Sstevel@tonic-gate if (g_length == 0) {
137*0Sstevel@tonic-gate continue;
138*0Sstevel@tonic-gate }
139*0Sstevel@tonic-gate
140*0Sstevel@tonic-gate /* While there is another group string */
141*0Sstevel@tonic-gate
142*0Sstevel@tonic-gate (void) fseek(e_fptr, g_curr, SEEK_SET);
143*0Sstevel@tonic-gate errno = 0;
144*0Sstevel@tonic-gate g_ptr = fgetgrent(e_fptr);
145*0Sstevel@tonic-gate sav_errno = errno;
146*0Sstevel@tonic-gate g_curr = ftell(e_fptr);
147*0Sstevel@tonic-gate
148*0Sstevel@tonic-gate if (g_ptr == NULL) {
149*0Sstevel@tonic-gate /* tried to parse a group string over MYBUFSIZ char */
150*0Sstevel@tonic-gate if (sav_errno == ERANGE)
151*0Sstevel@tonic-gate errmsg(M_GROUP_ENTRY_OVF);
152*0Sstevel@tonic-gate else
153*0Sstevel@tonic-gate errmsg(M_READ_ERROR);
154*0Sstevel@tonic-gate
155*0Sstevel@tonic-gate modified = 0; /* bad group file: cannot rebuild */
156*0Sstevel@tonic-gate break;
157*0Sstevel@tonic-gate }
158*0Sstevel@tonic-gate
159*0Sstevel@tonic-gate /* first delete the login from the group, if it's there */
160*0Sstevel@tonic-gate if (overwrite || !gids) {
161*0Sstevel@tonic-gate if (g_ptr->gr_mem != NULL) {
162*0Sstevel@tonic-gate for (memptr = g_ptr->gr_mem; *memptr;
163*0Sstevel@tonic-gate memptr++) {
164*0Sstevel@tonic-gate if (strcmp(*memptr, login) == 0) {
165*0Sstevel@tonic-gate /* Delete this one */
166*0Sstevel@tonic-gate char **from = memptr + 1;
167*0Sstevel@tonic-gate
168*0Sstevel@tonic-gate g_length -= (strlen(*memptr)+1);
169*0Sstevel@tonic-gate
170*0Sstevel@tonic-gate do {
171*0Sstevel@tonic-gate *(from - 1) = *from;
172*0Sstevel@tonic-gate } while (*from++);
173*0Sstevel@tonic-gate
174*0Sstevel@tonic-gate modified++;
175*0Sstevel@tonic-gate break;
176*0Sstevel@tonic-gate }
177*0Sstevel@tonic-gate }
178*0Sstevel@tonic-gate }
179*0Sstevel@tonic-gate }
180*0Sstevel@tonic-gate
181*0Sstevel@tonic-gate /* now check to see if group is one to add to */
182*0Sstevel@tonic-gate if (gids) {
183*0Sstevel@tonic-gate for (i = 0; gids[i] != -1; i++) {
184*0Sstevel@tonic-gate if (g_ptr->gr_gid == gids[i]) {
185*0Sstevel@tonic-gate /* Find end */
186*0Sstevel@tonic-gate for (memptr = g_ptr->gr_mem; *memptr;
187*0Sstevel@tonic-gate memptr++)
188*0Sstevel@tonic-gate ;
189*0Sstevel@tonic-gate g_length += strlen(new_login ?
190*0Sstevel@tonic-gate new_login : login)+1;
191*0Sstevel@tonic-gate
192*0Sstevel@tonic-gate *memptr++ = new_login ?
193*0Sstevel@tonic-gate new_login : login;
194*0Sstevel@tonic-gate *memptr = NULL;
195*0Sstevel@tonic-gate
196*0Sstevel@tonic-gate modified++;
197*0Sstevel@tonic-gate }
198*0Sstevel@tonic-gate }
199*0Sstevel@tonic-gate }
200*0Sstevel@tonic-gate putgrent(g_ptr, t_fptr);
201*0Sstevel@tonic-gate }
202*0Sstevel@tonic-gate free(g_string);
203*0Sstevel@tonic-gate
204*0Sstevel@tonic-gate (void) fclose(e_fptr);
205*0Sstevel@tonic-gate
206*0Sstevel@tonic-gate if (fclose(t_fptr) != 0) {
207*0Sstevel@tonic-gate (void) unlink(t_name);
208*0Sstevel@tonic-gate return (EX_UPDATE);
209*0Sstevel@tonic-gate }
210*0Sstevel@tonic-gate
211*0Sstevel@tonic-gate /* Now, update GROUP file, if it was modified */
212*0Sstevel@tonic-gate if (modified) {
213*0Sstevel@tonic-gate if (rename(t_name, GROUP) != 0) {
214*0Sstevel@tonic-gate (void) unlink(t_name);
215*0Sstevel@tonic-gate return (EX_UPDATE);
216*0Sstevel@tonic-gate }
217*0Sstevel@tonic-gate return (EX_SUCCESS);
218*0Sstevel@tonic-gate } else {
219*0Sstevel@tonic-gate (void) unlink(t_name);
220*0Sstevel@tonic-gate return (EX_SUCCESS);
221*0Sstevel@tonic-gate }
222*0Sstevel@tonic-gate }
223