1 /* $NetBSD: pw_scan.c,v 1.8 1998/11/13 12:31:50 christos 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 1.8 1998/11/13 12:31:50 christos 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 #include <err.h> 46 #include <limits.h> 47 #include <pwd.h> 48 #include <stdio.h> 49 #include <stdlib.h> 50 #include <string.h> 51 #include <unistd.h> 52 53 #ifdef _LIBC 54 #include "pw_private.h" 55 #endif 56 57 int 58 #ifdef _LIBC 59 __pw_scan(bp, pw, flags) 60 #else 61 pw_scan(bp, pw, flags) 62 #endif 63 char *bp; 64 struct passwd *pw; 65 int *flags; 66 { 67 unsigned long id; 68 int root, inflags; 69 char *ep; 70 const char *p, *sh; 71 72 inflags = 0; 73 if (flags != (int *)NULL) { 74 inflags = *flags; 75 *flags = 0; 76 } 77 78 if (!(pw->pw_name = strsep(&bp, ":"))) /* login */ 79 goto fmt; 80 root = !strcmp(pw->pw_name, "root"); 81 82 if (!(pw->pw_passwd = strsep(&bp, ":"))) /* passwd */ 83 goto fmt; 84 85 if (!(p = strsep(&bp, ":"))) /* uid */ 86 goto fmt; 87 id = strtoul(p, &ep, 10); 88 if (root && id) { 89 if (!(inflags & _PASSWORD_NOWARN)) 90 warnx("root uid should be 0"); 91 return (0); 92 } 93 if (id > UID_MAX || *ep != '\0') { 94 if (!(inflags & _PASSWORD_NOWARN)) 95 warnx("invalid uid '%s'", p); 96 return (0); 97 } 98 pw->pw_uid = (uid_t)id; 99 if ((*p == '\0') && (flags != (int *)NULL)) 100 *flags |= _PASSWORD_NOUID; 101 102 if (!(p = strsep(&bp, ":"))) /* gid */ 103 goto fmt; 104 id = strtoul(p, &ep, 10); 105 if (id > GID_MAX || *ep != '\0') { 106 if (!(inflags & _PASSWORD_NOWARN)) 107 warnx("invalid gid '%s'", p); 108 return (0); 109 } 110 pw->pw_gid = (gid_t)id; 111 if ((*p == '\0') && (flags != (int *)NULL)) 112 *flags |= _PASSWORD_NOGID; 113 114 if (inflags & _PASSWORD_OLDFMT) { 115 pw->pw_class = ""; 116 pw->pw_change = 0; 117 pw->pw_expire = 0; 118 *flags |= (_PASSWORD_NOCHG | _PASSWORD_NOEXP); 119 } else { 120 pw->pw_class = strsep(&bp, ":"); /* class */ 121 if (!(p = strsep(&bp, ":"))) /* change */ 122 goto fmt; 123 pw->pw_change = atol(p); 124 if ((*p == '\0') && (flags != (int *)NULL)) 125 *flags |= _PASSWORD_NOCHG; 126 if (!(p = strsep(&bp, ":"))) /* expire */ 127 goto fmt; 128 pw->pw_expire = atol(p); 129 if ((*p == '\0') && (flags != (int *)NULL)) 130 *flags |= _PASSWORD_NOEXP; 131 } 132 pw->pw_gecos = strsep(&bp, ":"); /* gecos */ 133 pw->pw_dir = strsep(&bp, ":"); /* directory */ 134 if (!(pw->pw_shell = strsep(&bp, ":"))) /* shell */ 135 goto fmt; 136 137 p = pw->pw_shell; 138 if (root && *p) /* empty == /bin/sh */ 139 for (setusershell();;) { 140 if (!(sh = getusershell())) { 141 if (!(inflags & _PASSWORD_NOWARN)) 142 warnx("warning, unknown root shell"); 143 break; 144 } 145 if (!strcmp(p, sh)) 146 break; 147 } 148 149 if ((p = strsep(&bp, ":")) != NULL) { /* too many */ 150 fmt: 151 if (!(inflags & _PASSWORD_NOWARN)) 152 warnx("corrupted entry"); 153 return (0); 154 } 155 156 return (1); 157 } 158