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[] = "@(#)util.c 5.14 (Berkeley) 2/12/91"; 36 #endif /* not lint */ 37 38 #include <sys/types.h> 39 #include <sys/time.h> 40 #include <tzfile.h> 41 #include <pwd.h> 42 #include <stdio.h> 43 #include <string.h> 44 #include <ctype.h> 45 #include "chpass.h" 46 #include "pathnames.h" 47 48 static int dmsize[] = 49 { -1, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }; 50 static char *months[] = 51 { "January", "February", "March", "April", "May", "June", 52 "July", "August", "September", "October", "November", 53 "December", NULL }; 54 char * 55 ttoa(tval) 56 time_t tval; 57 { 58 struct tm *tp; 59 static char tbuf[50]; 60 61 if (tval) { 62 tp = localtime(&tval); 63 (void)sprintf(tbuf, "%s %d, 19%d", months[tp->tm_mon], 64 tp->tm_mday, tp->tm_year); 65 } 66 else 67 *tbuf = '\0'; 68 return(tbuf); 69 } 70 71 atot(p, store) 72 char *p; 73 time_t *store; 74 { 75 register char *t, **mp; 76 static struct tm *lt; 77 time_t tval, time(); 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 for (mp = months;; ++mp) { 92 if (!*mp) 93 goto bad; 94 if (!strncasecmp(*mp, t, 3)) { 95 month = mp - months + 1; 96 break; 97 } 98 } 99 if (!(t = strtok((char *)NULL, " \t,")) || !isdigit(*t)) 100 goto bad; 101 day = atoi(t); 102 if (!(t = strtok((char *)NULL, " \t,")) || !isdigit(*t)) 103 goto bad; 104 year = atoi(t); 105 if (day < 1 || day > 31 || month < 1 || month > 12 || !year) 106 goto bad; 107 if (year < 100) 108 year += TM_YEAR_BASE; 109 if (year <= EPOCH_YEAR) 110 bad: return(1); 111 tval = isleap(year) && month > 2; 112 for (--year; year >= EPOCH_YEAR; --year) 113 tval += isleap(year) ? 114 DAYSPERLYEAR : DAYSPERNYEAR; 115 while (--month) 116 tval += dmsize[month]; 117 tval += day; 118 tval = tval * HOURSPERDAY * MINSPERHOUR * SECSPERMIN; 119 tval -= lt->tm_gmtoff; 120 *store = tval; 121 return(0); 122 } 123 124 char * 125 ok_shell(name) 126 register char *name; 127 { 128 register char *p, *sh; 129 char *getusershell(); 130 131 setusershell(); 132 while (sh = getusershell()) { 133 if (!strcmp(name, sh)) 134 return(name); 135 /* allow just shell name, but use "real" path */ 136 if ((p = rindex(sh, '/')) && !strcmp(name, p + 1)) 137 return(sh); 138 } 139 return(NULL); 140 } 141