1 /* $NetBSD: util.c,v 1.10 1998/07/26 15:13:14 mycroft 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 #include <sys/cdefs.h> 37 #ifndef lint 38 #if 0 39 static char sccsid[] = "@(#)util.c 8.4 (Berkeley) 4/2/94"; 40 #else 41 __RCSID("$NetBSD: util.c,v 1.10 1998/07/26 15:13:14 mycroft Exp $"); 42 #endif 43 #endif /* not lint */ 44 45 #include <sys/types.h> 46 47 #include <ctype.h> 48 #include <pwd.h> 49 #include <stdio.h> 50 #include <stdlib.h> 51 #include <string.h> 52 #include <time.h> 53 #include <tzfile.h> 54 #include <unistd.h> 55 56 #include "chpass.h" 57 #include "pathnames.h" 58 59 char * 60 ttoa(buf, len, tval) 61 char *buf; 62 size_t len; 63 time_t tval; 64 { 65 66 if (tval) { 67 struct tm *tp = localtime(&tval); 68 69 (void) strftime(buf, len, "%B %d, %Y", tp); 70 buf[len - 1] = '\0'; 71 } 72 else if (len > 0) 73 *buf = '\0'; 74 return (buf); 75 } 76 77 int 78 atot(p, store) 79 const char *p; 80 time_t *store; 81 { 82 static struct tm *lt; 83 struct tm tm; 84 char *t; 85 time_t tval; 86 87 if (!*p) { 88 *store = 0; 89 return (0); 90 } 91 if (!lt) { 92 unsetenv("TZ"); 93 (void)time(&tval); 94 lt = localtime(&tval); 95 } 96 (void) memset(&tm, 0, sizeof(tm)); 97 while ((t = strchr(p, ',')) != NULL) 98 *t = ' '; 99 t = strptime(p, "%B %d %Y", &tm); 100 if (t == NULL || (*t != '\0' && *t != '\n')) 101 return 1; 102 if ((*store = mktime(&tm)) == (time_t) -1) 103 return 1; 104 return (0); 105 } 106 107 const char * 108 ok_shell(name) 109 const char *name; 110 { 111 char *p; 112 const char *sh; 113 114 setusershell(); 115 while ((sh = getusershell()) != NULL) { 116 if (!strcmp(name, sh)) 117 return (name); 118 /* allow just shell name, but use "real" path */ 119 if ((p = strrchr(sh, '/')) && strcmp(name, p + 1) == 0) 120 return (sh); 121 } 122 return (NULL); 123 } 124