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 "$Id: pwupd.c,v 1.7 1998/02/11 23:31:24 wosch Exp $"; 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 47 static char pathpwd[] = _PATH_PWD; 48 static char * pwpath = pathpwd; 49 50 int 51 setpwdir(const char * dir) 52 { 53 if (dir == NULL) 54 return -1; 55 else { 56 char * d = malloc(strlen(dir)+1); 57 if (d == NULL) 58 return -1; 59 pwpath = strcpy(d, dir); 60 } 61 return 0; 62 } 63 64 char * 65 getpwpath(char const * file) 66 { 67 static char pathbuf[MAXPATHLEN]; 68 69 snprintf(pathbuf, sizeof pathbuf, "%s/%s", pwpath, file); 70 return pathbuf; 71 } 72 73 int 74 pwdb(char *arg,...) 75 { 76 int i = 0; 77 pid_t pid; 78 va_list ap; 79 char *args[10]; 80 81 args[i++] = _PATH_PWD_MKDB; 82 va_start(ap, arg); 83 while (i < 6 && arg != NULL) { 84 args[i++] = arg; 85 arg = va_arg(ap, char *); 86 } 87 if (pwpath != pathpwd) { 88 args[i++] = "-d"; 89 args[i++] = pwpath; 90 } 91 args[i++] = getpwpath(_MASTERPASSWD); 92 args[i] = NULL; 93 94 if ((pid = fork()) == -1) /* Error (errno set) */ 95 i = -1; 96 else if (pid == 0) { /* Child */ 97 execv(args[0], args); 98 _exit(1); 99 } else { /* Parent */ 100 waitpid(pid, &i, 0); 101 if ((i = WEXITSTATUS(i)) != 0) 102 errno = EIO; /* set SOMETHING */ 103 } 104 return i; 105 } 106 107 int 108 fmtpwentry(char *buf, struct passwd * pwd, int type) 109 { 110 int l; 111 char *pw; 112 113 pw = (pwd->pw_passwd == NULL || !*pwd->pw_passwd) ? "" : (type == PWF_MASTER) ? pwd->pw_passwd : "*"; 114 115 if (type == PWF_PASSWD) 116 l = sprintf(buf, "%s:*:%ld:%ld:%s:%s:%s\n", 117 pwd->pw_name, (long) pwd->pw_uid, (long) pwd->pw_gid, 118 pwd->pw_gecos ? pwd->pw_gecos : "User &", 119 pwd->pw_dir, pwd->pw_shell); 120 else 121 l = sprintf(buf, "%s:%s:%ld:%ld:%s:%lu:%lu:%s:%s:%s\n", 122 pwd->pw_name, pw, (long) pwd->pw_uid, (long) pwd->pw_gid, 123 pwd->pw_class ? pwd->pw_class : "", 124 (unsigned long) pwd->pw_change, 125 (unsigned long) pwd->pw_expire, 126 pwd->pw_gecos, pwd->pw_dir, pwd->pw_shell); 127 return l; 128 } 129 130 131 int 132 fmtpwent(char *buf, struct passwd * pwd) 133 { 134 return fmtpwentry(buf, pwd, PWF_STANDARD); 135 } 136 137 static int 138 pw_update(struct passwd * pwd, char const * user, int mode) 139 { 140 int rc = 0; 141 142 ENDPWENT(); 143 144 /* 145 * First, let's check the see if the database is alright 146 * Note: -C is only available in FreeBSD 2.2 and above 147 */ 148 #ifdef HAVE_PWDB_C 149 if (pwdb("-C", NULL) == 0) { /* Check only */ 150 #else 151 { /* No -C */ 152 #endif 153 char pfx[32]; 154 char pwbuf[PWBUFSZ]; 155 int l = sprintf(pfx, "%s:", user); 156 157 /* 158 * Update the passwd file first 159 */ 160 if (pwd == NULL) 161 *pwbuf = '\0'; 162 else 163 fmtpwentry(pwbuf, pwd, PWF_PASSWD); 164 if ((rc = fileupdate(getpwpath(_PASSWD), 0644, pwbuf, pfx, l, mode)) != 0) { 165 166 /* 167 * Then the master.passwd file 168 */ 169 if (pwd != NULL) 170 fmtpwentry(pwbuf, pwd, PWF_MASTER); 171 if ((rc = fileupdate(getpwpath(_MASTERPASSWD), 0644, pwbuf, pfx, l, mode)) != 0) 172 rc = pwdb(NULL) == 0; 173 } 174 } 175 return rc; 176 } 177 178 int 179 addpwent(struct passwd * pwd) 180 { 181 return pw_update(pwd, pwd->pw_name, UPD_CREATE); 182 } 183 184 int 185 chgpwent(char const * login, struct passwd * pwd) 186 { 187 return pw_update(pwd, login, UPD_REPLACE); 188 } 189 190 int 191 delpwent(struct passwd * pwd) 192 { 193 return pw_update(NULL, pwd->pw_name, UPD_DELETE); 194 } 195