1 /*- 2 * Copyright (c) 1988 The Regents of the University of California. 3 * 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 34 #ifndef lint 35 /*static char sccsid[] = "from: @(#)util.c 5.14 (Berkeley) 2/12/91";*/ 36 static char rcsid[] = "$Id: util.c,v 1.3 1994/01/03 08:21:14 cgd Exp $"; 37 #endif /* not lint */ 38 39 #include <sys/types.h> 40 #include <sys/time.h> 41 #include <tzfile.h> 42 #include <pwd.h> 43 #include <stdio.h> 44 #include <string.h> 45 #include <ctype.h> 46 #include "chpass.h" 47 #include "pathnames.h" 48 49 static int dmsize[] = 50 { -1, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }; 51 static char *months[] = 52 { "January", "February", "March", "April", "May", "June", 53 "July", "August", "September", "October", "November", 54 "December", NULL }; 55 char * 56 ttoa(tval) 57 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 + TM_YEAR_BASE); 66 } 67 else 68 *tbuf = '\0'; 69 return(tbuf); 70 } 71 72 atot(p, store) 73 char *p; 74 time_t *store; 75 { 76 register char *t, **mp; 77 static struct tm *lt; 78 time_t tval, time(); 79 int day, month, year; 80 81 if (!*p) { 82 *store = 0; 83 return(0); 84 } 85 if (!lt) { 86 unsetenv("TZ"); 87 (void)time(&tval); 88 lt = localtime(&tval); 89 } 90 if (!(t = strtok(p, " \t"))) 91 goto bad; 92 for (mp = months;; ++mp) { 93 if (!*mp) 94 goto bad; 95 if (!strncasecmp(*mp, t, 3)) { 96 month = mp - months + 1; 97 break; 98 } 99 } 100 if (!(t = strtok((char *)NULL, " \t,")) || !isdigit(*t)) 101 goto bad; 102 day = atoi(t); 103 if (!(t = strtok((char *)NULL, " \t,")) || !isdigit(*t)) 104 goto bad; 105 year = atoi(t); 106 if (day < 1 || day > 31 || month < 1 || month > 12 || !year) 107 goto bad; 108 if (year < 100) 109 year += TM_YEAR_BASE; 110 if (year <= EPOCH_YEAR) 111 bad: return(1); 112 tval = isleap(year) && month > 2; 113 for (--year; year >= EPOCH_YEAR; --year) 114 tval += isleap(year) ? 115 DAYSPERLYEAR : DAYSPERNYEAR; 116 while (--month) 117 tval += dmsize[month]; 118 tval += day; 119 tval = tval * HOURSPERDAY * MINSPERHOUR * SECSPERMIN; 120 tval -= lt->tm_gmtoff; 121 *store = tval; 122 return(0); 123 } 124 125 char * 126 ok_shell(name) 127 register char *name; 128 { 129 register char *p, *sh; 130 char *getusershell(); 131 132 setusershell(); 133 while (sh = getusershell()) { 134 if (!strcmp(name, sh)) 135 return(name); 136 /* allow just shell name, but use "real" path */ 137 if ((p = rindex(sh, '/')) && !strcmp(name, p + 1)) 138 return(sh); 139 } 140 return(NULL); 141 } 142