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