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 static char sccsid[] = "@(#)pw_scan.c 8.3 (Berkeley) 4/2/94"; 36 #endif /* not lint */ 37 38 /* 39 * This module is used to "verify" password entries by chpass(1) and 40 * pwd_mkdb(8). 41 */ 42 43 #include <sys/param.h> 44 45 #include <err.h> 46 #include <fcntl.h> 47 #include <pwd.h> 48 #include <errno.h> 49 #include <stdio.h> 50 #include <string.h> 51 #include <stdlib.h> 52 #include <unistd.h> 53 54 #include "pw_scan.h" 55 56 int 57 pw_scan(bp, pw) 58 char *bp; 59 struct passwd *pw; 60 { 61 long id; 62 int root; 63 char *p, *sh; 64 65 pw->pw_fields = 0; 66 if (!(pw->pw_name = strsep(&bp, ":"))) /* login */ 67 goto fmt; 68 root = !strcmp(pw->pw_name, "root"); 69 if(pw->pw_name[0] && (pw->pw_name[0] != '+' || pw->pw_name[1] == '\0')) 70 pw->pw_fields |= _PWF_NAME; 71 72 if (!(pw->pw_passwd = strsep(&bp, ":"))) /* passwd */ 73 goto fmt; 74 if(pw->pw_passwd[0]) pw->pw_fields |= _PWF_PASSWD; 75 76 if (!(p = strsep(&bp, ":"))) /* uid */ 77 goto fmt; 78 if(p[0]) pw->pw_fields |= _PWF_UID; 79 id = atol(p); 80 if (root && id) { 81 warnx("root uid should be 0"); 82 return (0); 83 } 84 if (id > USHRT_MAX) { 85 warnx("%s > max uid value (%d)", p, USHRT_MAX); 86 return (0); 87 } 88 pw->pw_uid = id; 89 90 if (!(p = strsep(&bp, ":"))) /* gid */ 91 goto fmt; 92 if(p[0]) pw->pw_fields |= _PWF_GID; 93 id = atol(p); 94 if (id > USHRT_MAX) { 95 warnx("%s > max gid value (%d)", p, USHRT_MAX); 96 return (0); 97 } 98 pw->pw_gid = id; 99 100 pw->pw_class = strsep(&bp, ":"); /* class */ 101 if(pw->pw_class[0]) pw->pw_fields |= _PWF_CLASS; 102 103 if (!(p = strsep(&bp, ":"))) /* change */ 104 goto fmt; 105 if(p[0]) pw->pw_fields |= _PWF_CHANGE; 106 pw->pw_change = atol(p); 107 108 if (!(p = strsep(&bp, ":"))) /* expire */ 109 goto fmt; 110 if(p[0]) pw->pw_fields |= _PWF_EXPIRE; 111 pw->pw_expire = atol(p); 112 113 if (!(pw->pw_gecos = strsep(&bp, ":"))) /* gecos */ 114 goto fmt; 115 if(pw->pw_gecos[0]) pw->pw_fields |= _PWF_GECOS; 116 117 if (!(pw->pw_dir = strsep(&bp, ":"))) /* directory */ 118 goto fmt; 119 if(pw->pw_dir[0]) pw->pw_fields |= _PWF_DIR; 120 121 if (!(pw->pw_shell = strsep(&bp, ":"))) /* shell */ 122 goto fmt; 123 124 p = pw->pw_shell; 125 if (root && *p) /* empty == /bin/sh */ 126 for (setusershell();;) { 127 if (!(sh = getusershell())) { 128 warnx("warning, unknown root shell"); 129 break; 130 } 131 if (!strcmp(p, sh)) 132 break; 133 } 134 if(p[0]) pw->pw_fields |= _PWF_SHELL; 135 136 if (p = strsep(&bp, ":")) { /* too many */ 137 fmt: warnx("corrupted entry"); 138 return (0); 139 } 140 return (1); 141 } 142