1 /*- 2 * Copyright (c) 1990, 1993, 1994 3 * The Regents of the University of California. 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 * 3. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)pw_scan.c 8.3 (Berkeley) 4/2/94 30 * $FreeBSD: src/lib/libc/gen/pw_scan.c,v 1.26 2007/01/09 00:27:55 imp Exp $ 31 * $DragonFly: src/usr.sbin/pwd_mkdb/pw_scan.c,v 1.3 2005/12/05 02:40:27 swildner Exp $ 32 */ 33 34 /* 35 * This module is used to "verify" password entries by chpass(1) and 36 * pwd_mkdb(8). 37 */ 38 39 #include <sys/param.h> 40 41 #include <err.h> 42 #include <errno.h> 43 #include <fcntl.h> 44 #include <pwd.h> 45 #include <stdio.h> 46 #include <string.h> 47 #include <stdlib.h> 48 #include <unistd.h> 49 50 #include "pw_scan.h" 51 52 int 53 __pw_scan(char *bp, struct passwd *pw, int flags) 54 { 55 long long id; 56 int root; 57 char *p, *sh; 58 const char *ep; 59 60 pw->pw_fields = 0; 61 if (!(pw->pw_name = strsep(&bp, ":"))) /* login */ 62 goto fmt; 63 root = !strcmp(pw->pw_name, "root"); 64 if (pw->pw_name[0] && (pw->pw_name[0] != '+' || pw->pw_name[1] == '\0')) 65 pw->pw_fields |= _PWF_NAME; 66 67 if (!(pw->pw_passwd = strsep(&bp, ":"))) /* passwd */ 68 goto fmt; 69 if (pw->pw_passwd[0]) 70 pw->pw_fields |= _PWF_PASSWD; 71 72 if (!(p = strsep(&bp, ":"))) /* uid */ 73 goto fmt; 74 if (p[0]) 75 pw->pw_fields |= _PWF_UID; 76 else { 77 if (pw->pw_name[0] != '+' && pw->pw_name[0] != '-') { 78 if (flags & _PWSCAN_WARN) 79 warnx("no uid for user %s", pw->pw_name); 80 return (0); 81 } 82 } 83 id = strtonum(p, 0, UID_MAX, &ep); 84 if (ep != NULL) { 85 if (flags & _PWSCAN_WARN) 86 warnx("%s uid is incorrect: %s", p, ep); 87 return (0); 88 } 89 if (root && id) { 90 if (flags & _PWSCAN_WARN) 91 warnx("root uid should be 0"); 92 return (0); 93 } 94 pw->pw_uid = (uid_t)id; 95 96 if (!(p = strsep(&bp, ":"))) /* gid */ 97 goto fmt; 98 if (p[0]) 99 pw->pw_fields |= _PWF_GID; 100 else { 101 if (pw->pw_name[0] != '+' && pw->pw_name[0] != '-') { 102 if (flags & _PWSCAN_WARN) 103 warnx("no gid for user %s", pw->pw_name); 104 return (0); 105 } 106 } 107 id = strtonum(p, 0, GID_MAX, &ep); 108 if (ep != NULL) { 109 if (flags & _PWSCAN_WARN) 110 warnx("%s gid is incorrect: %s", p, ep); 111 return (0); 112 } 113 pw->pw_gid = (gid_t)id; 114 115 if (flags & _PWSCAN_MASTER ) { 116 if (!(pw->pw_class = strsep(&bp, ":"))) /* class */ 117 goto fmt; 118 if (pw->pw_class[0]) 119 pw->pw_fields |= _PWF_CLASS; 120 121 if (!(p = strsep(&bp, ":"))) /* change */ 122 goto fmt; 123 if (p[0]) 124 pw->pw_fields |= _PWF_CHANGE; 125 pw->pw_change = atol(p); 126 127 if (!(p = strsep(&bp, ":"))) /* expire */ 128 goto fmt; 129 if (p[0]) 130 pw->pw_fields |= _PWF_EXPIRE; 131 pw->pw_expire = atol(p); 132 } 133 if (!(pw->pw_gecos = strsep(&bp, ":"))) /* gecos */ 134 goto fmt; 135 if (pw->pw_gecos[0]) 136 pw->pw_fields |= _PWF_GECOS; 137 138 if (!(pw->pw_dir = strsep(&bp, ":"))) /* directory */ 139 goto fmt; 140 if (pw->pw_dir[0]) 141 pw->pw_fields |= _PWF_DIR; 142 143 if (!(pw->pw_shell = strsep(&bp, ":"))) /* shell */ 144 goto fmt; 145 146 p = pw->pw_shell; 147 if (root && *p) { /* empty == /bin/sh */ 148 for (setusershell();;) { 149 if (!(sh = getusershell())) { 150 if (flags & _PWSCAN_WARN) 151 warnx("warning, unknown root shell"); 152 break; 153 } 154 if (!strcmp(p, sh)) 155 break; 156 } 157 endusershell(); 158 } 159 if (p[0]) 160 pw->pw_fields |= _PWF_SHELL; 161 162 if ((p = strsep(&bp, ":"))) { /* too many */ 163 fmt: 164 if (flags & _PWSCAN_WARN) 165 warnx("corrupted entry"); 166 return (0); 167 } 168 return (1); 169 } 170