1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 28 /* All Rights Reserved */ 29 30 #include <sys/types.h> 31 #include <stdio.h> 32 #include <ctype.h> 33 #include <grp.h> 34 #include <sys/stat.h> 35 #include <unistd.h> 36 #include <userdefs.h> 37 #include <strings.h> 38 #include <stdlib.h> 39 #include "users.h" 40 #include "messages.h" 41 42 /* lint error-killers: */ 43 void errmsg(int, int); 44 45 /* Modify group to new gid and/or new name */ 46 int 47 mod_group(char *group, gid_t gid, char *newgroup) 48 { 49 int modified = 0; 50 int fd; 51 char tname[] = "/etc/gtmp.XXXXXX"; 52 FILE *e_fptr, *t_fptr; 53 struct group *g_ptr; 54 struct stat sbuf; 55 boolean_t haserr; 56 int line = 1; 57 58 if ((e_fptr = fopen(GROUP, "r")) == NULL) 59 return (EX_UPDATE); 60 61 if (fstat(fileno(e_fptr), &sbuf) != 0) 62 return (EX_UPDATE); 63 64 if ((fd = mkstemp(tname)) == -1) 65 return (EX_UPDATE); 66 67 if ((t_fptr = fdopen(fd, "w")) == NULL) { 68 (void) close(fd); 69 (void) unlink(tname); 70 return (EX_UPDATE); 71 } 72 73 /* 74 * Get ownership and permissions correct 75 */ 76 77 if (fchmod(fd, sbuf.st_mode) != 0 || 78 fchown(fd, sbuf.st_uid, sbuf.st_gid) != 0) { 79 (void) fclose(t_fptr); 80 (void) unlink(tname); 81 return (EX_UPDATE); 82 } 83 84 while ((g_ptr = fgetgrent(e_fptr)) != NULL) { 85 86 /* check to see if group is one to modify */ 87 if (strcmp(g_ptr->gr_name, group) == 0) { 88 if (newgroup != NULL) 89 g_ptr->gr_name = newgroup; 90 if (gid != -1) 91 g_ptr->gr_gid = gid; 92 modified++; 93 } 94 putgrent(g_ptr, t_fptr); 95 line++; 96 } 97 98 haserr = !feof(e_fptr); 99 if (haserr) 100 errmsg(M_SYNTAX, line); 101 102 (void) fclose(e_fptr); 103 104 if (fclose(t_fptr) != 0 || haserr) { 105 /* GROUP file contains bad entries or write failed. */ 106 (void) unlink(tname); 107 return (EX_UPDATE); 108 } 109 110 if (modified) { 111 if (rename(tname, GROUP) != 0) { 112 (void) unlink(tname); 113 return (EX_UPDATE); 114 } 115 return (EX_SUCCESS); 116 } else { 117 (void) unlink(tname); 118 return (EX_NAME_NOT_EXIST); 119 } 120 } 121