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 const char sccsid[] = "@(#)util.c 8.4 (Berkeley) 4/2/94"; 36 #endif /* not lint */ 37 38 #include <sys/cdefs.h> 39 __FBSDID("$FreeBSD$"); 40 41 #include <sys/types.h> 42 43 #include <ctype.h> 44 #include <pwd.h> 45 #include <stdio.h> 46 #include <stdlib.h> 47 #include <string.h> 48 #include <time.h> 49 #include <unistd.h> 50 51 #include "chpass.h" 52 #include "pathnames.h" 53 54 static const char *months[] = 55 { "January", "February", "March", "April", "May", "June", 56 "July", "August", "September", "October", "November", 57 "December", NULL }; 58 59 char * 60 ttoa(time_t tval) 61 { 62 struct tm *tp; 63 static char tbuf[50]; 64 65 if (tval) { 66 tp = localtime(&tval); 67 (void)sprintf(tbuf, "%s %d, %d", months[tp->tm_mon], 68 tp->tm_mday, tp->tm_year + 1900); 69 } 70 else 71 *tbuf = '\0'; 72 return (tbuf); 73 } 74 75 int 76 atot(char *p, time_t *store) 77 { 78 static struct tm *lt; 79 char *t; 80 const char **mp; 81 time_t tval; 82 int day, month, year; 83 84 if (!*p) { 85 *store = 0; 86 return (0); 87 } 88 if (!lt) { 89 unsetenv("TZ"); 90 (void)time(&tval); 91 lt = localtime(&tval); 92 } 93 if (!(t = strtok(p, " \t"))) 94 goto bad; 95 if (isdigit(*t)) { 96 month = atoi(t); 97 } else { 98 for (mp = months;; ++mp) { 99 if (!*mp) 100 goto bad; 101 if (!strncasecmp(*mp, t, 3)) { 102 month = mp - months + 1; 103 break; 104 } 105 } 106 } 107 if (!(t = strtok((char *)NULL, " \t,")) || !isdigit(*t)) 108 goto bad; 109 day = atoi(t); 110 if (!(t = strtok((char *)NULL, " \t,")) || !isdigit(*t)) 111 goto bad; 112 year = atoi(t); 113 if (day < 1 || day > 31 || month < 1 || month > 12) 114 goto bad; 115 /* Allow two digit years 1969-2068 */ 116 if (year < 69) 117 year += 2000; 118 else if (year < 100) 119 year += 1900; 120 if (year < 1969) 121 bad: return (1); 122 lt->tm_year = year - 1900; 123 lt->tm_mon = month - 1; 124 lt->tm_mday = day; 125 lt->tm_hour = 0; 126 lt->tm_min = 0; 127 lt->tm_sec = 0; 128 lt->tm_isdst = -1; 129 if ((tval = mktime(lt)) < 0) 130 return (1); 131 *store = tval; 132 return (0); 133 } 134 135 char * 136 ok_shell(char *name) 137 { 138 char *p, *sh; 139 140 setusershell(); 141 while ((sh = getusershell())) { 142 if (!strcmp(name, sh)) 143 return (name); 144 /* allow just shell name, but use "real" path */ 145 if ((p = strrchr(sh, '/')) && strcmp(name, p + 1) == 0) 146 return (sh); 147 } 148 return (NULL); 149 } 150