pw_scan.c revision 1.11
1 /* $NetBSD: pw_scan.c,v 1.11 2002/01/29 10:20:30 tv 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 #if HAVE_CONFIG_H 37 #include "config.h" 38 #include "compat_pwd.h" 39 #else 40 #include <sys/cdefs.h> 41 #if defined(LIBC_SCCS) && !defined(lint) 42 __RCSID("$NetBSD: pw_scan.c,v 1.11 2002/01/29 10:20:30 tv Exp $"); 43 #endif /* LIBC_SCCS and not lint */ 44 45 #if defined(_LIBC) 46 #include "namespace.h" 47 #endif 48 #include <sys/types.h> 49 50 #include <assert.h> 51 #include <err.h> 52 #include <limits.h> 53 #include <pwd.h> 54 #include <stdio.h> 55 #include <stdlib.h> 56 #include <string.h> 57 #include <unistd.h> 58 59 #ifdef _LIBC 60 #include "pw_private.h" 61 #endif 62 #endif /* !HAVE_CONFIG_H */ 63 64 int 65 #ifdef _LIBC 66 __pw_scan(bp, pw, flags) 67 #else 68 pw_scan(bp, pw, flags) 69 #endif 70 char *bp; 71 struct passwd *pw; 72 int *flags; 73 { 74 unsigned long id; 75 int root, inflags; 76 char *ep; 77 const char *p, *sh; 78 79 _DIAGASSERT(bp != NULL); 80 _DIAGASSERT(pw != NULL); 81 82 inflags = 0; 83 if (flags != (int *)NULL) { 84 inflags = *flags; 85 *flags = 0; 86 } 87 88 if (!(pw->pw_name = strsep(&bp, ":"))) /* login */ 89 goto fmt; 90 root = !strcmp(pw->pw_name, "root"); 91 92 if (!(pw->pw_passwd = strsep(&bp, ":"))) /* passwd */ 93 goto fmt; 94 95 if (!(p = strsep(&bp, ":"))) /* uid */ 96 goto fmt; 97 id = strtoul(p, &ep, 10); 98 if (root && id) { 99 if (!(inflags & _PASSWORD_NOWARN)) 100 warnx("root uid should be 0"); 101 return (0); 102 } 103 if (id > UID_MAX || *ep != '\0') { 104 if (!(inflags & _PASSWORD_NOWARN)) 105 warnx("invalid uid '%s'", p); 106 return (0); 107 } 108 pw->pw_uid = (uid_t)id; 109 if ((*p == '\0') && (flags != (int *)NULL)) 110 *flags |= _PASSWORD_NOUID; 111 112 if (!(p = strsep(&bp, ":"))) /* gid */ 113 goto fmt; 114 id = strtoul(p, &ep, 10); 115 if (id > GID_MAX || *ep != '\0') { 116 if (!(inflags & _PASSWORD_NOWARN)) 117 warnx("invalid gid '%s'", p); 118 return (0); 119 } 120 pw->pw_gid = (gid_t)id; 121 if ((*p == '\0') && (flags != (int *)NULL)) 122 *flags |= _PASSWORD_NOGID; 123 124 if (inflags & _PASSWORD_OLDFMT) { 125 pw->pw_class = ""; 126 pw->pw_change = 0; 127 pw->pw_expire = 0; 128 *flags |= (_PASSWORD_NOCHG | _PASSWORD_NOEXP); 129 } else { 130 pw->pw_class = strsep(&bp, ":"); /* class */ 131 if (!(p = strsep(&bp, ":"))) /* change */ 132 goto fmt; 133 pw->pw_change = atol(p); 134 if ((*p == '\0') && (flags != (int *)NULL)) 135 *flags |= _PASSWORD_NOCHG; 136 if (!(p = strsep(&bp, ":"))) /* expire */ 137 goto fmt; 138 pw->pw_expire = atol(p); 139 if ((*p == '\0') && (flags != (int *)NULL)) 140 *flags |= _PASSWORD_NOEXP; 141 } 142 pw->pw_gecos = strsep(&bp, ":"); /* gecos */ 143 pw->pw_dir = strsep(&bp, ":"); /* directory */ 144 if (!(pw->pw_shell = strsep(&bp, ":"))) /* shell */ 145 goto fmt; 146 147 #if !HAVE_CONFIG_H 148 p = pw->pw_shell; 149 if (root && *p) /* empty == /bin/sh */ 150 for (setusershell();;) { 151 if (!(sh = getusershell())) { 152 if (!(inflags & _PASSWORD_NOWARN)) 153 warnx("warning, unknown root shell"); 154 break; 155 } 156 if (!strcmp(p, sh)) 157 break; 158 } 159 #endif 160 161 if ((p = strsep(&bp, ":")) != NULL) { /* too many */ 162 fmt: 163 if (!(inflags & _PASSWORD_NOWARN)) 164 warnx("corrupted entry"); 165 return (0); 166 } 167 168 return (1); 169 } 170
Indexes created Wed Sep 24 05:09:52 GMT 2025