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util.c revision 1.8 
      1 /*	$NetBSD: util.c,v 1.8 1998/02/04 15:21:53 christos 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 1.8 1998/02/04 15:21:53 christos 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 	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 char *
    108 ok_shell(name)
    109 	char *name;
    110 {
    111 	char *p, *sh;
    112 
    113 	setusershell();
    114 	while ((sh = getusershell()) != NULL) {
    115 		if (!strcmp(name, sh))
    116 			return (name);
    117 		/* allow just shell name, but use "real" path */
    118 		if ((p = strrchr(sh, '/')) && strcmp(name, p + 1) == 0)
    119 			return (sh);
    120 	}
    121 	return (NULL);
    122 }
    123