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. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #ifndef lint 35 #if 0 36 static char sccsid[] = "@(#)pw_scan.c 8.3 (Berkeley) 4/2/94"; 37 #endif 38 static const char rcsid[] = 39 "$Id$"; 40 #endif /* not lint */ 41 42 /* 43 * This module is used to "verify" password entries by chpass(1) and 44 * pwd_mkdb(8). 45 */ 46 47 #include <sys/param.h> 48 49 #include <err.h> 50 #include <fcntl.h> 51 #include <pwd.h> 52 #include <stdio.h> 53 #include <string.h> 54 #include <stdlib.h> 55 #include <unistd.h> 56 57 #include "pw_scan.h" 58 59 int 60 pw_scan(bp, pw) 61 char *bp; 62 struct passwd *pw; 63 { 64 long id; 65 int root; 66 char *p, *sh; 67 68 pw->pw_fields = 0; 69 if (!(pw->pw_name = strsep(&bp, ":"))) /* login */ 70 goto fmt; 71 root = !strcmp(pw->pw_name, "root"); 72 if(pw->pw_name[0] && (pw->pw_name[0] != '+' || pw->pw_name[1] == '\0')) 73 pw->pw_fields |= _PWF_NAME; 74 75 if (!(pw->pw_passwd = strsep(&bp, ":"))) /* passwd */ 76 goto fmt; 77 if(pw->pw_passwd[0]) pw->pw_fields |= _PWF_PASSWD; 78 79 if (!(p = strsep(&bp, ":"))) /* uid */ 80 goto fmt; 81 if(p[0]) pw->pw_fields |= _PWF_UID; 82 id = atol(p); 83 if (root && id) { 84 warnx("root uid should be 0"); 85 return (0); 86 } 87 if (id > USHRT_MAX) { 88 warnx("%s > max uid value (%d)", p, USHRT_MAX); 89 /*return (0);*/ /* THIS SHOULD NOT BE FATAL! */ 90 } 91 pw->pw_uid = id; 92 93 if (!(p = strsep(&bp, ":"))) /* gid */ 94 goto fmt; 95 if(p[0]) pw->pw_fields |= _PWF_GID; 96 id = atol(p); 97 if (id > USHRT_MAX) { 98 warnx("%s > max gid value (%d)", p, USHRT_MAX); 99 /* return (0); This should not be fatal! */ 100 } 101 pw->pw_gid = id; 102 103 pw->pw_class = strsep(&bp, ":"); /* class */ 104 if(pw->pw_class[0]) pw->pw_fields |= _PWF_CLASS; 105 106 if (!(p = strsep(&bp, ":"))) /* change */ 107 goto fmt; 108 if(p[0]) pw->pw_fields |= _PWF_CHANGE; 109 pw->pw_change = atol(p); 110 111 if (!(p = strsep(&bp, ":"))) /* expire */ 112 goto fmt; 113 if(p[0]) pw->pw_fields |= _PWF_EXPIRE; 114 pw->pw_expire = atol(p); 115 116 if (!(pw->pw_gecos = strsep(&bp, ":"))) /* gecos */ 117 goto fmt; 118 if(pw->pw_gecos[0]) pw->pw_fields |= _PWF_GECOS; 119 120 if (!(pw->pw_dir = strsep(&bp, ":"))) /* directory */ 121 goto fmt; 122 if(pw->pw_dir[0]) pw->pw_fields |= _PWF_DIR; 123 124 if (!(pw->pw_shell = strsep(&bp, ":"))) /* shell */ 125 goto fmt; 126 127 p = pw->pw_shell; 128 if (root && *p) /* empty == /bin/sh */ 129 for (setusershell();;) { 130 if (!(sh = getusershell())) { 131 warnx("warning, unknown root shell"); 132 break; 133 } 134 if (!strcmp(p, sh)) 135 break; 136 } 137 if(p[0]) pw->pw_fields |= _PWF_SHELL; 138 139 if ((p = strsep(&bp, ":"))) { /* too many */ 140 fmt: warnx("corrupted entry"); 141 return (0); 142 } 143 return (1); 144 } 145