1 /*- 2 * Copyright (C) 1996 3 * David L. Nugent. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 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. 13 * 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 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD: src/usr.sbin/pw/grupd.c,v 1.8 1999/10/26 04:27:14 davidn Exp $ 27 * $DragonFly: src/usr.sbin/pw/grupd.c,v 1.2 2003/06/17 04:30:01 dillon Exp $ 28 */ 29 30 #include <stdio.h> 31 #include <stdlib.h> 32 #include <string.h> 33 #include <unistd.h> 34 #include <stdarg.h> 35 #include <sys/types.h> 36 #include <sys/stat.h> 37 #include <sys/param.h> 38 39 #include "pwupd.h" 40 41 static char * grpath = _PATH_PWD; 42 43 int 44 setgrdir(const char * dir) 45 { 46 if (dir == NULL) 47 return -1; 48 else { 49 char * d = malloc(strlen(dir)+1); 50 if (d == NULL) 51 return -1; 52 grpath = strcpy(d, dir); 53 } 54 return 0; 55 } 56 57 char * 58 getgrpath(const char * file) 59 { 60 static char pathbuf[MAXPATHLEN]; 61 62 snprintf(pathbuf, sizeof pathbuf, "%s/%s", grpath, file); 63 return pathbuf; 64 } 65 66 int 67 grdb(char *arg,...) 68 { 69 /* 70 * This is a stub for now, but maybe eventually be functional 71 * if ever an indexed version of /etc/groups is implemented. 72 */ 73 arg=arg; 74 return 0; 75 } 76 77 int 78 fmtgrentry(char **buf, int * buflen, struct group * grp, int type) 79 { 80 int i, l; 81 82 /* 83 * Since a group line is of arbitrary length, 84 * we need to calculate up-front just how long 85 * it will need to be... 86 */ 87 /* groupname : password : gid : */ 88 l = strlen(grp->gr_name) + 1 + strlen(grp->gr_passwd) + 1 + 5 + 1; 89 /* group members + comma separator */ 90 for (i = 0; grp->gr_mem[i] != NULL; i++) { 91 l += strlen(grp->gr_mem[i]) + 1; 92 } 93 l += 2; /* For newline & NUL */ 94 if (extendline(buf, buflen, l) == -1) 95 l = -1; 96 else{ 97 /* 98 * Now we can safely format 99 */ 100 if (type == PWF_STANDARD) 101 l = sprintf(*buf, "%s:*:%ld:", grp->gr_name, (long) grp->gr_gid); 102 else 103 l = sprintf(*buf, "%s:%s:%ld:", grp->gr_name, grp->gr_passwd, (long) grp->gr_gid); 104 105 /* 106 * List members 107 */ 108 for (i = 0; grp->gr_mem[i] != NULL; i++) { 109 l += sprintf(*buf + l, "%s%s", i ? "," : "", grp->gr_mem[i]); 110 } 111 112 (*buf)[l++] = '\n'; 113 (*buf)[l] = '\0'; 114 } 115 return l; 116 } 117 118 119 int 120 fmtgrent(char **buf, int * buflen, struct group * grp) 121 { 122 return fmtgrentry(buf, buflen, grp, PWF_STANDARD); 123 } 124 125 126 static int 127 gr_update(struct group * grp, char const * group, int mode) 128 { 129 int l; 130 char pfx[64]; 131 int grbuflen = 0; 132 char *grbuf = NULL; 133 134 ENDGRENT(); 135 l = snprintf(pfx, sizeof pfx, "%s:", group); 136 137 /* 138 * Update the group file 139 */ 140 if (grp != NULL && fmtgrentry(&grbuf, &grbuflen, grp, PWF_PASSWD) == -1) 141 l = -1; 142 else { 143 l = fileupdate(getgrpath(_GROUP), 0644, grbuf, pfx, l, mode); 144 if (l == 0) 145 l = grdb(NULL); 146 } 147 if (grbuf != NULL) 148 free(grbuf); 149 return l; 150 } 151 152 153 int 154 addgrent(struct group * grp) 155 { 156 return gr_update(grp, grp->gr_name, UPD_CREATE); 157 } 158 159 int 160 chggrent(char const * login, struct group * grp) 161 { 162 return gr_update(grp, login, UPD_REPLACE); 163 } 164 165 int 166 delgrent(struct group * grp) 167 { 168 return gr_update(NULL, grp->gr_name, UPD_DELETE); 169 } 170