1 /*- 2 * Copyright (c) 1988, 1993, 1994 3 * The Regents of the University of California. All rights reserved. 4 * Copyright (c) 2002 Networks Associates Technology, Inc. 5 * All rights reserved. 6 * 7 * Portions of this software were developed for the FreeBSD Project by 8 * ThinkSec AS and NAI Labs, the Security Research Division of Network 9 * Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 10 * ("CBOSS"), as part of the DARPA CHATS research program. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. All advertising materials mentioning features or use of this software 21 * must display the following acknowledgement: 22 * This product includes software developed by the University of 23 * California, Berkeley and its contributors. 24 * 4. Neither the name of the University nor the names of its contributors 25 * may be used to endorse or promote products derived from this software 26 * without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 * 40 * @(#)util.c 8.4 (Berkeley) 4/2/94 41 * $FreeBSD: src/usr.bin/chpass/util.c,v 1.13 2004/01/18 21:46:39 charnier Exp $ 42 * $DragonFly: src/usr.bin/chpass/util.c,v 1.3 2003/10/02 17:42:26 hmp Exp $ 43 */ 44 45 #include <sys/types.h> 46 47 #include <ctype.h> 48 #include <stdio.h> 49 #include <stdlib.h> 50 #include <string.h> 51 #include <time.h> 52 #include <unistd.h> 53 54 #include "chpass.h" 55 56 static const char *months[] = 57 { "January", "February", "March", "April", "May", "June", 58 "July", "August", "September", "October", "November", 59 "December", NULL }; 60 61 char * 62 ttoa(time_t tval) 63 { 64 struct tm *tp; 65 static char tbuf[50]; 66 67 if (tval) { 68 tp = localtime(&tval); 69 sprintf(tbuf, "%s %d, %d", months[tp->tm_mon], 70 tp->tm_mday, tp->tm_year + 1900); 71 } 72 else 73 *tbuf = '\0'; 74 return (tbuf); 75 } 76 77 int 78 atot(char *p, time_t *store) 79 { 80 static struct tm *lt; 81 char *t; 82 const char **mp; 83 time_t tval; 84 int day, month, year; 85 86 if (!*p) { 87 *store = 0; 88 return (0); 89 } 90 if (!lt) { 91 unsetenv("TZ"); 92 time(&tval); 93 lt = localtime(&tval); 94 } 95 if (!(t = strtok(p, " \t"))) 96 goto bad; 97 if (isdigit(*t)) { 98 month = atoi(t); 99 } else { 100 for (mp = months;; ++mp) { 101 if (!*mp) 102 goto bad; 103 if (!strncasecmp(*mp, t, 3)) { 104 month = mp - months + 1; 105 break; 106 } 107 } 108 } 109 if (!(t = strtok((char *)NULL, " \t,")) || !isdigit(*t)) 110 goto bad; 111 day = atoi(t); 112 if (!(t = strtok((char *)NULL, " \t,")) || !isdigit(*t)) 113 goto bad; 114 year = atoi(t); 115 if (day < 1 || day > 31 || month < 1 || month > 12) 116 goto bad; 117 /* Allow two digit years 1969-2068 */ 118 if (year < 69) 119 year += 2000; 120 else if (year < 100) 121 year += 1900; 122 if (year < 1969) 123 bad: return (1); 124 lt->tm_year = year - 1900; 125 lt->tm_mon = month - 1; 126 lt->tm_mday = day; 127 lt->tm_hour = 0; 128 lt->tm_min = 0; 129 lt->tm_sec = 0; 130 lt->tm_isdst = -1; 131 if ((tval = mktime(lt)) < 0) 132 return (1); 133 *store = tval; 134 return (0); 135 } 136 137 int 138 ok_shell(char *name) 139 { 140 char *p, *sh; 141 142 setusershell(); 143 while ((sh = getusershell())) { 144 if (!strcmp(name, sh)) { 145 endusershell(); 146 return (1); 147 } 148 /* allow just shell name, but use "real" path */ 149 if ((p = strrchr(sh, '/')) && strcmp(name, p + 1) == 0) { 150 endusershell(); 151 return (1); 152 } 153 } 154 endusershell(); 155 return (0); 156 } 157 158 char * 159 dup_shell(char *name) 160 { 161 char *p, *sh, *ret; 162 163 setusershell(); 164 while ((sh = getusershell())) { 165 if (!strcmp(name, sh)) { 166 endusershell(); 167 return (strdup(name)); 168 } 169 /* allow just shell name, but use "real" path */ 170 if ((p = strrchr(sh, '/')) && strcmp(name, p + 1) == 0) { 171 ret = strdup(sh); 172 endusershell(); 173 return (ret); 174 } 175 } 176 endusershell(); 177 return (NULL); 178 } 179