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 34 #ifndef lint 35 static char sccsid[] = "@(#)util.c 8.4 (Berkeley) 4/2/94"; 36 #endif /* not lint */ 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 <tzfile.h> 47 #include <unistd.h> 48 49 #include "chpass.h" 50 #include "pathnames.h" 51 52 static int dmsize[] = 53 { -1, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }; 54 static char *months[] = 55 { "January", "February", "March", "April", "May", "June", 56 "July", "August", "September", "October", "November", 57 "December", NULL }; 58 59 char * 60 ttoa(tval) 61 time_t tval; 62 { 63 struct tm *tp; 64 static char tbuf[50]; 65 66 if (tval) { 67 tp = localtime(&tval); 68 (void)sprintf(tbuf, "%s %d, %d", months[tp->tm_mon], 69 tp->tm_mday, tp->tm_year + TM_YEAR_BASE); 70 } 71 else 72 *tbuf = '\0'; 73 return (tbuf); 74 } 75 76 int 77 atot(p, store) 78 char *p; 79 time_t *store; 80 { 81 static struct tm *lt; 82 char *t, **mp; 83 time_t tval; 84 int day, month, year; 85 86 if (!*p) { 87 *store = 0; 88 return (0); 89 } 90 if (!lt) { 91 unsetenv("TZ"); 92 (void)time(&tval); 93 lt = localtime(&tval); 94 } 95 if (!(t = strtok(p, " \t"))) 96 goto bad; 97 for (mp = months;; ++mp) { 98 if (!*mp) 99 goto bad; 100 if (!strncasecmp(*mp, t, 3)) { 101 month = mp - months + 1; 102 break; 103 } 104 } 105 if (!(t = strtok((char *)NULL, " \t,")) || !isdigit(*t)) 106 goto bad; 107 day = atoi(t); 108 if (!(t = strtok((char *)NULL, " \t,")) || !isdigit(*t)) 109 goto bad; 110 year = atoi(t); 111 if (day < 1 || day > 31 || month < 1 || month > 12 || !year) 112 goto bad; 113 if (year < 100) 114 year += TM_YEAR_BASE; 115 if (year <= EPOCH_YEAR) 116 bad: return (1); 117 tval = isleap(year) && month > 2; 118 for (--year; year >= EPOCH_YEAR; --year) 119 tval += isleap(year) ? 120 DAYSPERLYEAR : DAYSPERNYEAR; 121 while (--month) 122 tval += dmsize[month]; 123 tval += day; 124 tval = tval * HOURSPERDAY * MINSPERHOUR * SECSPERMIN; 125 tval -= lt->tm_gmtoff; 126 *store = tval; 127 return (0); 128 } 129 130 char * 131 ok_shell(name) 132 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