>Number:         10950
>Category:       lib
>Synopsis:       strftime(3) ignores tm_zone when processing %Z
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    lib-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon Sep 04 22:50:01 PDT 2000
>Closed-Date:
>Last-Modified:
>Originator:     Takahiro Kambe
>Release:        NetBSD 1.5_ALPHA2 (2000/9/3)
>Organization:
	
>Environment:
	
System: NetBSD edge.sky.yamashina.kyoto.jp 1.5_ALPHA2 NetBSD 1.5_ALPHA2 (CF-M33) #58: Sat Aug 19 23:58:06 JST 2000 taca@edge.sky.yamashina.kyoto.jp:/usr/src/sys/arch/i386/compile/CF-M33 i386


>Description:
	strftime(3) ignores tm_zone filed of last parameter, struct tm *
	when processing %Z in format string.

>How-To-Repeat:
	A sample program is bellow.

#include <stdio.h>
#include <time.h>

main()
{
	time_t t;
	struct tm *tm;
	char buf[BUFSIZ];

	tzset();
	time(&t);
	tm = gmtime(&t);
	printf("%-10s tm_zone: %s, ", "gmtime", tm->tm_zone);
	if (strftime(buf, sizeof buf, "%Z", tm))
		printf("strftime %%Z: %s\n", buf);
	tm = localtime(&t);
	printf("%-10s tm_zone: %s, ", "localtime", tm->tm_zone);
	if (strftime(buf, sizeof buf, "%Z", tm))
		printf("strftime %%Z: %s\n", buf);
}

	This program output:

gmtime     tm_zone: GMT, strftime %Z: JST
localtime  tm_zone: JST, strftime %Z: JST

	If it might be spec of ANSI X3.159-1989 ("ANSI C"), but this make
	%Z format string much useless.

>Fix:
	Fix strftime(3) to honor tm_zone filed.

>Release-Note:
>Audit-Trail:
>Unformatted: