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 27 #ifndef lint 28 static const char rcsid[] = 29 "$FreeBSD$"; 30 #endif /* not lint */ 31 32 #include <stdio.h> 33 #include <stdlib.h> 34 #include <string.h> 35 #include <unistd.h> 36 #include <stdarg.h> 37 #include <errno.h> 38 #include <sys/types.h> 39 #include <sys/stat.h> 40 #include <sys/param.h> 41 #include <sys/wait.h> 42 43 #include "pwupd.h" 44 45 #define HAVE_PWDB_C 1 46 #define HAVE_PWDB_U 1 47 48 static char pathpwd[] = _PATH_PWD; 49 static char * pwpath = pathpwd; 50 51 int 52 setpwdir(const char * dir) 53 { 54 if (dir == NULL) 55 return -1; 56 else { 57 char * d = malloc(strlen(dir)+1); 58 if (d == NULL) 59 return -1; 60 pwpath = strcpy(d, dir); 61 } 62 return 0; 63 } 64 65 char * 66 getpwpath(char const * file) 67 { 68 static char pathbuf[MAXPATHLEN]; 69 70 snprintf(pathbuf, sizeof pathbuf, "%s/%s", pwpath, file); 71 return pathbuf; 72 } 73 74 int 75 pwdb(char *arg,...) 76 { 77 int i = 0; 78 pid_t pid; 79 va_list ap; 80 char *args[10]; 81 82 args[i++] = _PATH_PWD_MKDB; 83 va_start(ap, arg); 84 while (i < 6 && arg != NULL) { 85 args[i++] = arg; 86 arg = va_arg(ap, char *); 87 } 88 if (pwpath != pathpwd) { 89 args[i++] = "-d"; 90 args[i++] = pwpath; 91 } 92 args[i++] = getpwpath(_MASTERPASSWD); 93 args[i] = NULL; 94 95 if ((pid = fork()) == -1) /* Error (errno set) */ 96 i = errno; 97 else if (pid == 0) { /* Child */ 98 execv(args[0], args); 99 _exit(1); 100 } else { /* Parent */ 101 waitpid(pid, &i, 0); 102 if (WEXITSTATUS(i)) 103 i = EIO; 104 } 105 return i; 106 } 107 108 int 109 fmtpwentry(char *buf, struct passwd * pwd, int type) 110 { 111 int l; 112 char *pw; 113 114 pw = (pwd->pw_passwd == NULL || !*pwd->pw_passwd) ? "" : (type == PWF_MASTER) ? pwd->pw_passwd : "*"; 115 116 if (type == PWF_PASSWD) 117 l = sprintf(buf, "%s:*:%ld:%ld:%s:%s:%s\n", 118 pwd->pw_name, (long) pwd->pw_uid, (long) pwd->pw_gid, 119 pwd->pw_gecos ? pwd->pw_gecos : "User &", 120 pwd->pw_dir, pwd->pw_shell); 121 else 122 l = sprintf(buf, "%s:%s:%ld:%ld:%s:%lu:%lu:%s:%s:%s\n", 123 pwd->pw_name, pw, (long) pwd->pw_uid, (long) pwd->pw_gid, 124 pwd->pw_class ? pwd->pw_class : "", 125 (unsigned long) pwd->pw_change, 126 (unsigned long) pwd->pw_expire, 127 pwd->pw_gecos, pwd->pw_dir, pwd->pw_shell); 128 return l; 129 } 130 131 132 int 133 fmtpwent(char *buf, struct passwd * pwd) 134 { 135 return fmtpwentry(buf, pwd, PWF_STANDARD); 136 } 137 138 static int 139 pw_update(struct passwd * pwd, char const * user, int mode) 140 { 141 int rc = 0; 142 143 ENDPWENT(); 144 145 /* 146 * First, let's check the see if the database is alright 147 * Note: -C is only available in FreeBSD 2.2 and above 148 */ 149 #ifdef HAVE_PWDB_C 150 if (pwdb("-C", NULL) == 0) { /* Check only */ 151 #else 152 { /* No -C */ 153 #endif 154 char pfx[PWBUFSZ]; 155 char pwbuf[PWBUFSZ]; 156 int l = snprintf(pfx, PWBUFSZ, "%s:", user); 157 #ifdef HAVE_PWDB_U 158 int isrename = pwd!=NULL && strcmp(user, pwd->pw_name); 159 #endif 160 161 /* 162 * Update the passwd file first 163 */ 164 if (pwd == NULL) 165 *pwbuf = '\0'; 166 else 167 fmtpwentry(pwbuf, pwd, PWF_PASSWD); 168 169 if (l < 0) 170 l = 0; 171 rc = fileupdate(getpwpath(_PASSWD), 0644, pwbuf, pfx, l, mode); 172 if (rc == 0) { 173 174 /* 175 * Then the master.passwd file 176 */ 177 if (pwd != NULL) 178 fmtpwentry(pwbuf, pwd, PWF_MASTER); 179 rc = fileupdate(getpwpath(_MASTERPASSWD), 0600, pwbuf, pfx, l, mode); 180 if (rc == 0) { 181 #ifdef HAVE_PWDB_U 182 if (mode == UPD_DELETE || isrename) 183 #endif 184 rc = pwdb(NULL); 185 #ifdef HAVE_PWDB_U 186 else 187 rc = pwdb("-u", user, NULL); 188 #endif 189 } 190 } 191 } 192 return rc; 193 } 194 195 int 196 addpwent(struct passwd * pwd) 197 { 198 return pw_update(pwd, pwd->pw_name, UPD_CREATE); 199 } 200 201 int 202 chgpwent(char const * login, struct passwd * pwd) 203 { 204 return pw_update(pwd, login, UPD_REPLACE); 205 } 206 207 int 208 delpwent(struct passwd * pwd) 209 { 210 return pw_update(NULL, pwd->pw_name, UPD_DELETE); 211 } 212