1 /* $NetBSD: util.c,v 1.4 1995/03/26 04:55:35 glass 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 #ifndef lint 37 #if 0 38 static char sccsid[] = "@(#)util.c 8.4 (Berkeley) 4/2/94"; 39 #else 40 static char rcsid[] = "$NetBSD: util.c,v 1.4 1995/03/26 04:55:35 glass Exp $"; 41 #endif 42 #endif /* not lint */ 43 44 #include <sys/types.h> 45 46 #include <ctype.h> 47 #include <pwd.h> 48 #include <stdio.h> 49 #include <stdlib.h> 50 #include <string.h> 51 #include <time.h> 52 #include <tzfile.h> 53 #include <unistd.h> 54 55 #include "chpass.h" 56 #include "pathnames.h" 57 58 static int dmsize[] = 59 { -1, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }; 60 static char *months[] = 61 { "January", "February", "March", "April", "May", "June", 62 "July", "August", "September", "October", "November", 63 "December", NULL }; 64 65 char * 66 ttoa(tval) 67 time_t tval; 68 { 69 struct tm *tp; 70 static char tbuf[50]; 71 72 if (tval) { 73 tp = localtime(&tval); 74 (void)sprintf(tbuf, "%s %d, %d", months[tp->tm_mon], 75 tp->tm_mday, tp->tm_year + TM_YEAR_BASE); 76 } 77 else 78 *tbuf = '\0'; 79 return (tbuf); 80 } 81 82 int 83 atot(p, store) 84 char *p; 85 time_t *store; 86 { 87 static struct tm *lt; 88 char *t, **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 for (mp = months;; ++mp) { 104 if (!*mp) 105 goto bad; 106 if (!strncasecmp(*mp, t, 3)) { 107 month = mp - months + 1; 108 break; 109 } 110 } 111 if (!(t = strtok((char *)NULL, " \t,")) || !isdigit(*t)) 112 goto bad; 113 day = atoi(t); 114 if (!(t = strtok((char *)NULL, " \t,")) || !isdigit(*t)) 115 goto bad; 116 year = atoi(t); 117 if (day < 1 || day > 31 || month < 1 || month > 12 || !year) 118 goto bad; 119 if (year < 100) 120 year += TM_YEAR_BASE; 121 if (year <= EPOCH_YEAR) 122 bad: return (1); 123 tval = isleap(year) && month > 2; 124 for (--year; year >= EPOCH_YEAR; --year) 125 tval += isleap(year) ? 126 DAYSPERLYEAR : DAYSPERNYEAR; 127 while (--month) 128 tval += dmsize[month]; 129 tval += day; 130 tval = tval * HOURSPERDAY * MINSPERHOUR * SECSPERMIN; 131 tval -= lt->tm_gmtoff; 132 *store = tval; 133 return (0); 134 } 135 136 char * 137 ok_shell(name) 138 char *name; 139 { 140 char *p, *sh; 141 142 setusershell(); 143 while (sh = getusershell()) { 144 if (!strcmp(name, sh)) 145 return (name); 146 /* allow just shell name, but use "real" path */ 147 if ((p = strrchr(sh, '/')) && strcmp(name, p + 1) == 0) 148 return (sh); 149 } 150 return (NULL); 151 } 152