1 /* $NetBSD: pw_scan.c,v 1.13 2003/10/27 00:12:42 lukem Exp $ */ 2 3 /* 4 * Copyright (c) 1987, 1993, 1994, 1995 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #if HAVE_NBTOOL_CONFIG_H 33 #include "nbtool_config.h" 34 #include "compat_pwd.h" 35 36 #else 37 #include <sys/cdefs.h> 38 #if defined(LIBC_SCCS) && !defined(lint) 39 __RCSID("$NetBSD: pw_scan.c,v 1.13 2003/10/27 00:12:42 lukem Exp $"); 40 #endif /* LIBC_SCCS and not lint */ 41 42 #if defined(_LIBC) 43 #include "namespace.h" 44 #endif 45 #include <sys/types.h> 46 47 #include <assert.h> 48 #include <err.h> 49 #include <limits.h> 50 #include <pwd.h> 51 #include <stdio.h> 52 #include <stdlib.h> 53 #include <string.h> 54 #include <unistd.h> 55 56 #ifdef _LIBC 57 #include "pw_private.h" 58 #endif 59 #endif /* ! HAVE_NBTOOL_CONFIG_H */ 60 61 int 62 #ifdef _LIBC 63 __pw_scan(bp, pw, flags) 64 #else 65 pw_scan(bp, pw, flags) 66 #endif 67 char *bp; 68 struct passwd *pw; 69 int *flags; 70 { 71 unsigned long id; 72 int root, inflags; 73 char *ep; 74 const char *p, *sh; 75 76 _DIAGASSERT(bp != NULL); 77 _DIAGASSERT(pw != NULL); 78 79 inflags = 0; 80 if (flags != (int *)NULL) { 81 inflags = *flags; 82 *flags = 0; 83 } 84 85 if (!(pw->pw_name = strsep(&bp, ":"))) /* login */ 86 goto fmt; 87 root = !strcmp(pw->pw_name, "root"); 88 89 if (!(pw->pw_passwd = strsep(&bp, ":"))) /* passwd */ 90 goto fmt; 91 92 if (!(p = strsep(&bp, ":"))) /* uid */ 93 goto fmt; 94 id = strtoul(p, &ep, 10); 95 if (root && id) { 96 if (!(inflags & _PASSWORD_NOWARN)) 97 warnx("root uid should be 0"); 98 return (0); 99 } 100 if (id > UID_MAX || *ep != '\0') { 101 if (!(inflags & _PASSWORD_NOWARN)) 102 warnx("invalid uid '%s'", p); 103 return (0); 104 } 105 pw->pw_uid = (uid_t)id; 106 if ((*p == '\0') && (flags != (int *)NULL)) 107 *flags |= _PASSWORD_NOUID; 108 109 if (!(p = strsep(&bp, ":"))) /* gid */ 110 goto fmt; 111 id = strtoul(p, &ep, 10); 112 if (id > GID_MAX || *ep != '\0') { 113 if (!(inflags & _PASSWORD_NOWARN)) 114 warnx("invalid gid '%s'", p); 115 return (0); 116 } 117 pw->pw_gid = (gid_t)id; 118 if ((*p == '\0') && (flags != (int *)NULL)) 119 *flags |= _PASSWORD_NOGID; 120 121 if (inflags & _PASSWORD_OLDFMT) { 122 pw->pw_class = ""; 123 pw->pw_change = 0; 124 pw->pw_expire = 0; 125 *flags |= (_PASSWORD_NOCHG | _PASSWORD_NOEXP); 126 } else { 127 pw->pw_class = strsep(&bp, ":"); /* class */ 128 if (!(p = strsep(&bp, ":"))) /* change */ 129 goto fmt; 130 pw->pw_change = atol(p); 131 if ((*p == '\0') && (flags != (int *)NULL)) 132 *flags |= _PASSWORD_NOCHG; 133 if (!(p = strsep(&bp, ":"))) /* expire */ 134 goto fmt; 135 pw->pw_expire = atol(p); 136 if ((*p == '\0') && (flags != (int *)NULL)) 137 *flags |= _PASSWORD_NOEXP; 138 } 139 pw->pw_gecos = strsep(&bp, ":"); /* gecos */ 140 pw->pw_dir = strsep(&bp, ":"); /* directory */ 141 if (!(pw->pw_shell = strsep(&bp, ":"))) /* shell */ 142 goto fmt; 143 144 #if ! HAVE_NBTOOL_CONFIG_H 145 p = pw->pw_shell; 146 if (root && *p) /* empty == /bin/sh */ 147 for (setusershell();;) { 148 if (!(sh = getusershell())) { 149 if (!(inflags & _PASSWORD_NOWARN)) 150 warnx("warning, unknown root shell"); 151 break; 152 } 153 if (!strcmp(p, sh)) 154 break; 155 } 156 #endif 157 158 if ((p = strsep(&bp, ":")) != NULL) { /* too many */ 159 fmt: 160 if (!(inflags & _PASSWORD_NOWARN)) 161 warnx("corrupted entry"); 162 return (0); 163 } 164 165 return (1); 166 } 167