1 /*- 2 * SPDX-License-Identifier: BSD-4-Clause 3 * 4 * Copyright (c) 1988, 1993, 1994 5 * The Regents of the University of California. All rights reserved. 6 * Copyright (c) 2002 Networks Associates Technology, Inc. 7 * All rights reserved. 8 * 9 * Portions of this software were developed for the FreeBSD Project by 10 * ThinkSec AS and NAI Labs, the Security Research Division of Network 11 * Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 12 * ("CBOSS"), as part of the DARPA CHATS research program. 13 * 14 * Redistribution and use in source and binary forms, with or without 15 * modification, are permitted provided that the following conditions 16 * are met: 17 * 1. Redistributions of source code must retain the above copyright 18 * notice, this list of conditions and the following disclaimer. 19 * 2. Redistributions in binary form must reproduce the above copyright 20 * notice, this list of conditions and the following disclaimer in the 21 * documentation and/or other materials provided with the distribution. 22 * 3. All advertising materials mentioning features or use of this software 23 * must display the following acknowledgement: 24 * This product includes software developed by the University of 25 * California, Berkeley and its contributors. 26 * 4. Neither the name of the University nor the names of its contributors 27 * may be used to endorse or promote products derived from this software 28 * without specific prior written permission. 29 * 30 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 31 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 32 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 33 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 34 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 35 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 36 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 37 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 38 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 39 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 40 * SUCH DAMAGE. 41 */ 42 43 #ifndef lint 44 #if 0 45 static char sccsid[] = "@(#)util.c 8.4 (Berkeley) 4/2/94"; 46 #endif 47 #endif /* not lint */ 48 #include <sys/cdefs.h> 49 __FBSDID("$FreeBSD$"); 50 51 #include <sys/types.h> 52 53 #include <ctype.h> 54 #include <stdio.h> 55 #include <stdlib.h> 56 #include <string.h> 57 #include <time.h> 58 #include <unistd.h> 59 60 #include "chpass.h" 61 62 static const char *months[] = 63 { "January", "February", "March", "April", "May", "June", 64 "July", "August", "September", "October", "November", 65 "December", NULL }; 66 67 char * 68 ttoa(time_t tval) 69 { 70 struct tm *tp; 71 static char tbuf[50]; 72 73 if (tval) { 74 tp = localtime(&tval); 75 (void)sprintf(tbuf, "%s %d, %d", months[tp->tm_mon], 76 tp->tm_mday, tp->tm_year + 1900); 77 } 78 else 79 *tbuf = '\0'; 80 return (tbuf); 81 } 82 83 int 84 atot(char *p, time_t *store) 85 { 86 static struct tm *lt; 87 char *t; 88 const char **mp; 89 time_t tval; 90 int day, month, year; 91 92 if (!*p) { 93 *store = 0; 94 return (0); 95 } 96 if (!lt) { 97 unsetenv("TZ"); 98 (void)time(&tval); 99 lt = localtime(&tval); 100 } 101 if (!(t = strtok(p, " \t"))) 102 goto bad; 103 if (isdigit(*t)) { 104 month = atoi(t); 105 } else { 106 for (mp = months;; ++mp) { 107 if (!*mp) 108 goto bad; 109 if (!strncasecmp(*mp, t, 3)) { 110 month = mp - months + 1; 111 break; 112 } 113 } 114 } 115 if (!(t = strtok(NULL, " \t,")) || !isdigit(*t)) 116 goto bad; 117 day = atoi(t); 118 if (!(t = strtok(NULL, " \t,")) || !isdigit(*t)) 119 goto bad; 120 year = atoi(t); 121 if (day < 1 || day > 31 || month < 1 || month > 12) 122 goto bad; 123 /* Allow two digit years 1969-2068 */ 124 if (year < 69) 125 year += 2000; 126 else if (year < 100) 127 year += 1900; 128 if (year < 1969) 129 bad: return (1); 130 lt->tm_year = year - 1900; 131 lt->tm_mon = month - 1; 132 lt->tm_mday = day; 133 lt->tm_hour = 0; 134 lt->tm_min = 0; 135 lt->tm_sec = 0; 136 lt->tm_isdst = -1; 137 if ((tval = mktime(lt)) < 0) 138 return (1); 139 *store = tval; 140 return (0); 141 } 142 143 int 144 ok_shell(char *name) 145 { 146 char *p, *sh; 147 148 setusershell(); 149 while ((sh = getusershell())) { 150 if (!strcmp(name, sh)) { 151 endusershell(); 152 return (1); 153 } 154 /* allow just shell name, but use "real" path */ 155 if ((p = strrchr(sh, '/')) && strcmp(name, p + 1) == 0) { 156 endusershell(); 157 return (1); 158 } 159 } 160 endusershell(); 161 return (0); 162 } 163 164 char * 165 dup_shell(char *name) 166 { 167 char *p, *sh, *ret; 168 169 setusershell(); 170 while ((sh = getusershell())) { 171 if (!strcmp(name, sh)) { 172 endusershell(); 173 return (strdup(name)); 174 } 175 /* allow just shell name, but use "real" path */ 176 if ((p = strrchr(sh, '/')) && strcmp(name, p + 1) == 0) { 177 ret = strdup(sh); 178 endusershell(); 179 return (ret); 180 } 181 } 182 endusershell(); 183 return (NULL); 184 } 185