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 1.10 2001/08/30 06:32:17 dd Exp $ 27 */ 28 29 #include <stdio.h> 30 #include <stdlib.h> 31 #include <string.h> 32 #include <unistd.h> 33 #include <stdarg.h> 34 #include <sys/types.h> 35 #include <sys/stat.h> 36 #include <sys/param.h> 37 38 #include "pwupd.h" 39 40 static char * grpath = _PATH_PWD; 41 42 int 43 setgrdir(const char * dir) 44 { 45 if (dir == NULL) 46 return -1; 47 else { 48 char * d = malloc(strlen(dir)+1); 49 if (d == NULL) 50 return -1; 51 grpath = strcpy(d, dir); 52 } 53 return 0; 54 } 55 56 char * 57 getgrpath(const char * file) 58 { 59 static char pathbuf[MAXPATHLEN]; 60 61 snprintf(pathbuf, sizeof pathbuf, "%s/%s", grpath, file); 62 return pathbuf; 63 } 64 65 int 66 grdb(char *arg,...) 67 { 68 /* 69 * This is a stub for now, but maybe eventually be functional 70 * if ever an indexed version of /etc/groups is implemented. 71 */ 72 arg=arg; 73 return 0; 74 } 75 76 int 77 fmtgrentry(char **buf, int * buflen, struct group * grp, int type) 78 { 79 int i, l; 80 81 /* 82 * Since a group line is of arbitrary length, 83 * we need to calculate up-front just how long 84 * it will need to be... 85 */ 86 /* groupname : password : gid : */ 87 l = strlen(grp->gr_name) + 1 + strlen(grp->gr_passwd) + 1 + 5 + 1; 88 /* group members + comma separator */ 89 for (i = 0; grp->gr_mem[i] != NULL; i++) { 90 l += strlen(grp->gr_mem[i]) + 1; 91 } 92 l += 2; /* For newline & NUL */ 93 if (extendline(buf, buflen, l) == -1) 94 l = -1; 95 else{ 96 /* 97 * Now we can safely format 98 */ 99 if (type == PWF_STANDARD) 100 l = sprintf(*buf, "%s:*:%ld:", grp->gr_name, (long) grp->gr_gid); 101 else 102 l = sprintf(*buf, "%s:%s:%ld:", grp->gr_name, grp->gr_passwd, (long) grp->gr_gid); 103 104 /* 105 * List members 106 */ 107 for (i = 0; grp->gr_mem[i] != NULL; i++) { 108 l += sprintf(*buf + l, "%s%s", i ? "," : "", grp->gr_mem[i]); 109 } 110 111 (*buf)[l++] = '\n'; 112 (*buf)[l] = '\0'; 113 } 114 return l; 115 } 116 117 118 int 119 fmtgrent(char **buf, int * buflen, struct group * grp) 120 { 121 return fmtgrentry(buf, buflen, grp, PWF_STANDARD); 122 } 123 124 125 static int 126 gr_update(struct group * grp, char const * group, int mode) 127 { 128 int l; 129 char pfx[64]; 130 int grbuflen = 0; 131 char *grbuf = NULL; 132 133 ENDGRENT(); 134 l = snprintf(pfx, sizeof pfx, "%s:", group); 135 136 /* 137 * Update the group file 138 */ 139 if (grp != NULL && fmtgrentry(&grbuf, &grbuflen, grp, PWF_PASSWD) == -1) 140 l = -1; 141 else { 142 l = fileupdate(getgrpath(_GROUP), 0644, grbuf, pfx, l, mode); 143 if (l == 0) 144 l = grdb(NULL); 145 } 146 if (grbuf != NULL) 147 free(grbuf); 148 return l; 149 } 150 151 152 int 153 addgrent(struct group * grp) 154 { 155 return gr_update(grp, grp->gr_name, UPD_CREATE); 156 } 157 158 int 159 chggrent(char const * login, struct group * grp) 160 { 161 return gr_update(grp, login, UPD_REPLACE); 162 } 163 164 int 165 delgrent(struct group * grp) 166 { 167 return gr_update(NULL, grp->gr_name, UPD_DELETE); 168 } 169