1 /*- 2 * Copyright (c) 1988, 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 * @(#)util.c 8.4 (Berkeley) 4/2/94 34 * $FreeBSD: src/usr.bin/chpass/util.c,v 1.8.2.1 2002/03/21 10:33:01 cjc Exp $ 35 * $DragonFly: src/usr.bin/chpass/util.c,v 1.3 2003/10/02 17:42:26 hmp Exp $ 36 */ 37 38 #include <sys/types.h> 39 40 #include <ctype.h> 41 #include <pwd.h> 42 #include <stdio.h> 43 #include <stdlib.h> 44 #include <string.h> 45 #include <time.h> 46 #include <unistd.h> 47 48 #include "chpass.h" 49 #include "pathnames.h" 50 51 static char *months[] = 52 { "January", "February", "March", "April", "May", "June", 53 "July", "August", "September", "October", "November", 54 "December", NULL }; 55 56 char * 57 ttoa(time_t tval) 58 { 59 struct tm *tp; 60 static char tbuf[50]; 61 62 if (tval) { 63 tp = localtime(&tval); 64 (void)sprintf(tbuf, "%s %d, %d", months[tp->tm_mon], 65 tp->tm_mday, tp->tm_year + 1900); 66 } 67 else 68 *tbuf = '\0'; 69 return (tbuf); 70 } 71 72 int 73 atot(char *p, time_t *store) 74 { 75 static struct tm *lt; 76 char *t, **mp; 77 time_t tval; 78 int day, month, year; 79 80 if (!*p) { 81 *store = 0; 82 return (0); 83 } 84 if (!lt) { 85 unsetenv("TZ"); 86 (void)time(&tval); 87 lt = localtime(&tval); 88 } 89 if (!(t = strtok(p, " \t"))) 90 goto bad; 91 if (isdigit(*t)) { 92 month = atoi(t); 93 } else { 94 for (mp = months;; ++mp) { 95 if (!*mp) 96 goto bad; 97 if (!strncasecmp(*mp, t, 3)) { 98 month = mp - months + 1; 99 break; 100 } 101 } 102 } 103 if (!(t = strtok((char *)NULL, " \t,")) || !isdigit(*t)) 104 goto bad; 105 day = atoi(t); 106 if (!(t = strtok((char *)NULL, " \t,")) || !isdigit(*t)) 107 goto bad; 108 year = atoi(t); 109 if (day < 1 || day > 31 || month < 1 || month > 12) 110 goto bad; 111 /* Allow two digit years 1969-2068 */ 112 if (year < 69) 113 year += 2000; 114 else if (year < 100) 115 year += 1900; 116 if (year < 1969) 117 bad: return (1); 118 lt->tm_year = year - 1900; 119 lt->tm_mon = month - 1; 120 lt->tm_mday = day; 121 lt->tm_hour = 0; 122 lt->tm_min = 0; 123 lt->tm_sec = 0; 124 lt->tm_isdst = -1; 125 if ((tval = mktime(lt)) < 0) 126 return (1); 127 *store = tval; 128 return (0); 129 } 130 131 char * 132 ok_shell(char *name) 133 { 134 char *p, *sh; 135 136 setusershell(); 137 while ((sh = getusershell())) { 138 if (!strcmp(name, sh)) 139 return (name); 140 /* allow just shell name, but use "real" path */ 141 if ((p = strrchr(sh, '/')) && strcmp(name, p + 1) == 0) 142 return (sh); 143 } 144 return (NULL); 145 } 146