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 va_end(ap); 106 return i; 107 } 108 109 int 110 fmtpwentry(char *buf, struct passwd * pwd, int type) 111 { 112 int l; 113 char *pw; 114 115 pw = (type == PWF_MASTER) ? 116 ((pwd->pw_passwd == NULL) ? "" : pwd->pw_passwd) : "*"; 117 118 if (type == PWF_PASSWD) 119 l = sprintf(buf, "%s:*:%ld:%ld:%s:%s:%s\n", 120 pwd->pw_name, (long) pwd->pw_uid, (long) pwd->pw_gid, 121 pwd->pw_gecos ? pwd->pw_gecos : "User &", 122 pwd->pw_dir, pwd->pw_shell); 123 else 124 l = sprintf(buf, "%s:%s:%ld:%ld:%s:%lu:%lu:%s:%s:%s\n", 125 pwd->pw_name, pw, (long) pwd->pw_uid, (long) pwd->pw_gid, 126 pwd->pw_class ? pwd->pw_class : "", 127 (unsigned long) pwd->pw_change, 128 (unsigned long) pwd->pw_expire, 129 pwd->pw_gecos, pwd->pw_dir, pwd->pw_shell); 130 return l; 131 } 132 133 134 int 135 fmtpwent(char *buf, struct passwd * pwd) 136 { 137 return fmtpwentry(buf, pwd, PWF_STANDARD); 138 } 139 140 static int 141 pw_update(struct passwd * pwd, char const * user, int mode) 142 { 143 int rc = 0; 144 145 ENDPWENT(); 146 147 /* 148 * First, let's check the see if the database is alright 149 * Note: -C is only available in FreeBSD 2.2 and above 150 */ 151 #ifdef HAVE_PWDB_C 152 rc = pwdb("-C", (char *)NULL); /* Check only */ 153 if (rc == 0) { 154 #else 155 { /* No -C */ 156 #endif 157 char pfx[PWBUFSZ]; 158 char pwbuf[PWBUFSZ]; 159 int l = snprintf(pfx, PWBUFSZ, "%s:", user); 160 #ifdef HAVE_PWDB_U 161 int isrename = pwd!=NULL && strcmp(user, pwd->pw_name); 162 #endif 163 164 /* 165 * Update the passwd file first 166 */ 167 if (pwd == NULL) 168 *pwbuf = '\0'; 169 else 170 fmtpwentry(pwbuf, pwd, PWF_PASSWD); 171 172 if (l < 0) 173 l = 0; 174 rc = fileupdate(getpwpath(_PASSWD), 0644, pwbuf, pfx, l, mode); 175 if (rc == 0) { 176 177 /* 178 * Then the master.passwd file 179 */ 180 if (pwd != NULL) 181 fmtpwentry(pwbuf, pwd, PWF_MASTER); 182 rc = fileupdate(getpwpath(_MASTERPASSWD), 0600, pwbuf, pfx, l, mode); 183 if (rc == 0) { 184 #ifdef HAVE_PWDB_U 185 if (mode == UPD_DELETE || isrename) 186 #endif 187 rc = pwdb(NULL); 188 #ifdef HAVE_PWDB_U 189 else 190 rc = pwdb("-u", user, (char *)NULL); 191 #endif 192 } 193 } 194 } 195 return rc; 196 } 197 198 int 199 addpwent(struct passwd * pwd) 200 { 201 return pw_update(pwd, pwd->pw_name, UPD_CREATE); 202 } 203 204 int 205 chgpwent(char const * login, struct passwd * pwd) 206 { 207 return pw_update(pwd, login, UPD_REPLACE); 208 } 209 210 int 211 delpwent(struct passwd * pwd) 212 { 213 return pw_update(NULL, pwd->pw_name, UPD_DELETE); 214 } 215