1 /* $NetBSD: pw_scan.c,v 1.10 1999/09/20 04:39:04 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. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 #if defined(LIBC_SCCS) && !defined(lint) 38 __RCSID("$NetBSD: pw_scan.c,v 1.10 1999/09/20 04:39:04 lukem Exp $"); 39 #endif /* LIBC_SCCS and not lint */ 40 41 #if defined(_LIBC) 42 #include "namespace.h" 43 #endif 44 #include <sys/types.h> 45 46 #include <assert.h> 47 #include <err.h> 48 #include <limits.h> 49 #include <pwd.h> 50 #include <stdio.h> 51 #include <stdlib.h> 52 #include <string.h> 53 #include <unistd.h> 54 55 #ifdef _LIBC 56 #include "pw_private.h" 57 #endif 58 59 int 60 #ifdef _LIBC 61 __pw_scan(bp, pw, flags) 62 #else 63 pw_scan(bp, pw, flags) 64 #endif 65 char *bp; 66 struct passwd *pw; 67 int *flags; 68 { 69 unsigned long id; 70 int root, inflags; 71 char *ep; 72 const char *p, *sh; 73 74 _DIAGASSERT(bp != NULL); 75 _DIAGASSERT(pw != NULL); 76 77 inflags = 0; 78 if (flags != (int *)NULL) { 79 inflags = *flags; 80 *flags = 0; 81 } 82 83 if (!(pw->pw_name = strsep(&bp, ":"))) /* login */ 84 goto fmt; 85 root = !strcmp(pw->pw_name, "root"); 86 87 if (!(pw->pw_passwd = strsep(&bp, ":"))) /* passwd */ 88 goto fmt; 89 90 if (!(p = strsep(&bp, ":"))) /* uid */ 91 goto fmt; 92 id = strtoul(p, &ep, 10); 93 if (root && id) { 94 if (!(inflags & _PASSWORD_NOWARN)) 95 warnx("root uid should be 0"); 96 return (0); 97 } 98 if (id > UID_MAX || *ep != '\0') { 99 if (!(inflags & _PASSWORD_NOWARN)) 100 warnx("invalid uid '%s'", p); 101 return (0); 102 } 103 pw->pw_uid = (uid_t)id; 104 if ((*p == '\0') && (flags != (int *)NULL)) 105 *flags |= _PASSWORD_NOUID; 106 107 if (!(p = strsep(&bp, ":"))) /* gid */ 108 goto fmt; 109 id = strtoul(p, &ep, 10); 110 if (id > GID_MAX || *ep != '\0') { 111 if (!(inflags & _PASSWORD_NOWARN)) 112 warnx("invalid gid '%s'", p); 113 return (0); 114 } 115 pw->pw_gid = (gid_t)id; 116 if ((*p == '\0') && (flags != (int *)NULL)) 117 *flags |= _PASSWORD_NOGID; 118 119 if (inflags & _PASSWORD_OLDFMT) { 120 pw->pw_class = ""; 121 pw->pw_change = 0; 122 pw->pw_expire = 0; 123 *flags |= (_PASSWORD_NOCHG | _PASSWORD_NOEXP); 124 } else { 125 pw->pw_class = strsep(&bp, ":"); /* class */ 126 if (!(p = strsep(&bp, ":"))) /* change */ 127 goto fmt; 128 pw->pw_change = atol(p); 129 if ((*p == '\0') && (flags != (int *)NULL)) 130 *flags |= _PASSWORD_NOCHG; 131 if (!(p = strsep(&bp, ":"))) /* expire */ 132 goto fmt; 133 pw->pw_expire = atol(p); 134 if ((*p == '\0') && (flags != (int *)NULL)) 135 *flags |= _PASSWORD_NOEXP; 136 } 137 pw->pw_gecos = strsep(&bp, ":"); /* gecos */ 138 pw->pw_dir = strsep(&bp, ":"); /* directory */ 139 if (!(pw->pw_shell = strsep(&bp, ":"))) /* shell */ 140 goto fmt; 141 142 p = pw->pw_shell; 143 if (root && *p) /* empty == /bin/sh */ 144 for (setusershell();;) { 145 if (!(sh = getusershell())) { 146 if (!(inflags & _PASSWORD_NOWARN)) 147 warnx("warning, unknown root shell"); 148 break; 149 } 150 if (!strcmp(p, sh)) 151 break; 152 } 153 154 if ((p = strsep(&bp, ":")) != NULL) { /* too many */ 155 fmt: 156 if (!(inflags & _PASSWORD_NOWARN)) 157 warnx("corrupted entry"); 158 return (0); 159 } 160 161 return (1); 162 } 163