I guess ftime() isn’t used much, but setting timezone for east
(TZ=GMT-NN) makes timeb.timezone return some really wild value.
for GMT+1:
timeb.timezone=60 ------- correct
for GMT-1:
timeb.timezone=17416 ------- ??? should be -60
Looking at the 6.1 libc sources, lib/c/qnx/ftime.c:ftime() has
timeptr->timezone = (-tm_ptr->tm_gmtoff) / 60UL;
which will be promoted to (unsigned long) which will
clobber negative offset. There shouldn’t be UL here.
–
kabe
*** test code follows ***
#if shell
set -x
gcc $0
TZ=GMT+1 ./a.out
TZ=GMT-1 ./a.out
exit
#endif
#include <stdio.h>
#include <sys/timeb.h>
int
main()
{
struct timeb timeb;
tzset();
ftime(&timeb);
printf(“time=%s”, ctime(&timeb.time));
printf(“timeb.timezone=%d\n”, (int)(signed short)timeb.timezone);
}