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      1 /*	$NetBSD: util.c,v 1.12 2005/02/17 17:09:48 xtraeme 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. Neither the name of the University nor the names of its contributors
     16  *    may be used to endorse or promote products derived from this software
     17  *    without specific prior written permission.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     29  * SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 #ifndef lint
     34 #if 0
     35 static char sccsid[] = "@(#)util.c	8.4 (Berkeley) 4/2/94";
     36 #else
     37 __RCSID("$NetBSD: util.c,v 1.12 2005/02/17 17:09:48 xtraeme Exp $");
     38 #endif
     39 #endif /* not lint */
     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 <tzfile.h>
     50 #include <unistd.h>
     51 
     52 #include "chpass.h"
     53 #include "pathnames.h"
     54 
     55 char *
     56 ttoa(char *buf, size_t len, time_t tval)
     57 {
     58 
     59 	if (tval) {
     60 		struct tm *tp = localtime(&tval);
     61 
     62 		(void) strftime(buf, len, "%B %d, %Y", tp);
     63 		buf[len - 1] = '\0';
     64 	}
     65 	else if (len > 0)
     66 		*buf = '\0';
     67 	return (buf);
     68 }
     69 
     70 int
     71 atot(const char *p, time_t *store)
     72 {
     73 	static struct tm *lt;
     74 	struct tm tm;
     75 	char *t;
     76 	time_t tval;
     77 
     78 	if (!*p) {
     79 		*store = 0;
     80 		return (0);
     81 	}
     82 	if (!lt) {
     83 		unsetenv("TZ");
     84 		(void)time(&tval);
     85 		lt = localtime(&tval);
     86 	}
     87 	(void) memset(&tm, 0, sizeof(tm));
     88 	while ((t = strchr(p, ',')) != NULL)
     89 		*t = ' ';
     90 	t = strptime(p, "%B %d %Y", &tm);
     91 	if (t == NULL || (*t != '\0' && *t != '\n'))
     92 		return 1;
     93 	if ((*store = mktime(&tm)) == (time_t) -1)
     94 		return 1;
     95 	return (0);
     96 }
     97 
     98 const char *
     99 ok_shell(const char *name)
    100 {
    101 	char *p;
    102 	const char *sh;
    103 
    104 	setusershell();
    105 	while ((sh = getusershell()) != NULL) {
    106 		if (!strcmp(name, sh))
    107 			return (name);
    108 		/* allow just shell name, but use "real" path */
    109 		if ((p = strrchr(sh, '/')) && strcmp(name, p + 1) == 0)
    110 			return (sh);
    111 	}
    112 	return (NULL);
    113 }
    114