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 31 #pragma ident "%Z%%M% %I% %E% SMI" /* SVr4.0 1.3 */ 32 33 #include <sys/types.h> 34 #include <sys/stat.h> 35 #include <stdio.h> 36 #include <unistd.h> 37 #include <userdefs.h> 38 39 #define GRPTMP "/etc/gtmp" 40 #define GRPBUFSIZ 5120 41 42 int 43 add_group(group, gid) 44 char *group; /* name of group to add */ 45 gid_t gid; /* gid of group to add */ 46 { 47 FILE *etcgrp; /* /etc/group file */ 48 FILE *etctmp; /* temp file */ 49 int o_mask; /* old umask value */ 50 int newdone = 0; /* set true when new entry done */ 51 struct stat sb; /* stat buf to copy modes */ 52 char buf[GRPBUFSIZ]; 53 54 if ((etcgrp = fopen(GROUP, "r")) == NULL) { 55 return (EX_UPDATE); 56 } 57 58 if (fstat(fileno(etcgrp), &sb) < 0) { 59 /* If we can't get mode, take a default */ 60 sb.st_mode = S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH; 61 } 62 63 o_mask = umask(077); 64 etctmp = fopen(GRPTMP, "w+"); 65 (void) umask(o_mask); 66 67 if (etctmp == NULL) { 68 fclose(etcgrp); 69 return (EX_UPDATE); 70 } 71 72 if (fchmod(fileno(etctmp), sb.st_mode) != 0 || 73 fchown(fileno(etctmp), sb.st_uid, sb.st_gid) != 0 || 74 lockf(fileno(etctmp), F_LOCK, 0) != 0) { 75 fclose(etcgrp); 76 fclose(etctmp); 77 unlink(GRPTMP); 78 return (EX_UPDATE); 79 } 80 81 while (fgets(buf, GRPBUFSIZ, etcgrp) != NULL) { 82 /* Check for NameService reference */ 83 if (!newdone && (buf[0] == '+' || buf[0] == '-')) { 84 (void) fprintf(etctmp, "%s::%ld:\n", group, gid); 85 newdone = 1; 86 } 87 88 fputs(buf, etctmp); 89 } 90 91 92 (void) fclose(etcgrp); 93 94 if (!newdone) { 95 (void) fprintf(etctmp, "%s::%ld:\n", group, gid); 96 } 97 98 if (rename(GRPTMP, GROUP) < 0) { 99 fclose(etctmp); 100 unlink(GRPTMP); 101 return (EX_UPDATE); 102 } 103 104 (void) fclose(etctmp); 105 106 107 return (EX_SUCCESS); 108 } 109