1 /* $NetBSD: util.c,v 1.7 1997/10/18 12:49:17 lukem Exp $ */ 2 3 /*- 4 * Copyright (c) 1988, 1993, 1994 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 #ifndef lint 38 #if 0 39 static char sccsid[] = "@(#)util.c 8.4 (Berkeley) 4/2/94"; 40 #else 41 __RCSID("$NetBSD: util.c,v 1.7 1997/10/18 12:49:17 lukem Exp $"); 42 #endif 43 #endif /* not lint */ 44 45 #include <sys/types.h> 46 47 #include <ctype.h> 48 #include <pwd.h> 49 #include <stdio.h> 50 #include <stdlib.h> 51 #include <string.h> 52 #include <time.h> 53 #include <tzfile.h> 54 #include <unistd.h> 55 56 #include "chpass.h" 57 #include "pathnames.h" 58 59 static int dmsize[] = 60 { -1, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }; 61 static char *months[] = 62 { "January", "February", "March", "April", "May", "June", 63 "July", "August", "September", "October", "November", 64 "December", NULL }; 65 66 char * 67 ttoa(tval) 68 time_t tval; 69 { 70 struct tm *tp; 71 static char tbuf[50]; 72 73 if (tval) { 74 tp = localtime(&tval); 75 (void)snprintf(tbuf, sizeof tbuf, "%s %d, %d", months[tp->tm_mon], 76 tp->tm_mday, tp->tm_year + TM_YEAR_BASE); 77 } 78 else 79 *tbuf = '\0'; 80 return (tbuf); 81 } 82 83 int 84 atot(p, store) 85 char *p; 86 time_t *store; 87 { 88 static struct tm *lt; 89 char *t, **mp; 90 time_t tval; 91 int day, month, year; 92 93 if (!*p) { 94 *store = 0; 95 return (0); 96 } 97 if (!lt) { 98 unsetenv("TZ"); 99 (void)time(&tval); 100 lt = localtime(&tval); 101 } 102 if (!(t = strtok(p, " \t"))) 103 goto bad; 104 for (mp = months;; ++mp) { 105 if (!*mp) 106 goto bad; 107 if (!strncasecmp(*mp, t, 3)) { 108 month = mp - months + 1; 109 break; 110 } 111 } 112 if (!(t = strtok((char *)NULL, " \t,")) || !isdigit(*t)) 113 goto bad; 114 day = atoi(t); 115 if (!(t = strtok((char *)NULL, " \t,")) || !isdigit(*t)) 116 goto bad; 117 year = atoi(t); 118 if (day < 1 || day > 31 || month < 1 || month > 12 || !year) 119 goto bad; 120 if (year < 100) 121 year += TM_YEAR_BASE; 122 if (year <= EPOCH_YEAR) 123 bad: return (1); 124 tval = isleap(year) && month > 2; 125 for (--year; year >= EPOCH_YEAR; --year) 126 tval += isleap(year) ? 127 DAYSPERLYEAR : DAYSPERNYEAR; 128 while (--month) 129 tval += dmsize[month]; 130 tval += day; 131 tval = tval * HOURSPERDAY * MINSPERHOUR * SECSPERMIN; 132 tval -= lt->tm_gmtoff; 133 *store = tval; 134 return (0); 135 } 136 137 char * 138 ok_shell(name) 139 char *name; 140 { 141 char *p, *sh; 142 143 setusershell(); 144 while ((sh = getusershell()) != NULL) { 145 if (!strcmp(name, sh)) 146 return (name); 147 /* allow just shell name, but use "real" path */ 148 if ((p = strrchr(sh, '/')) && strcmp(name, p + 1) == 0) 149 return (sh); 150 } 151 return (NULL); 152 } 153