Santashil PalChaudhuri wrote:
Hi,
Below I give a code snippet, for using adjtime() on my redhat system.
The maximum delta allowed is +/- 2145 seconds. If I give bigger than
this, then I get a EINVAL error no 22 as the delta is greater than the
maximum allowed. Is this normal?
I was trying to use "ntpdate -B <server>" which uses the adjtime always
and that gives a "Can't adjust the time of day: Invalid argument"
because of this adjtime error.
Any comments will be appreciated.
Regards
Santa
run the following as root....
-------------------------
#include <sys/time.h>
#include <stdio.h>
#include <errno.h>
int main(int argc, char *argv[])
{
struct timeval adj, old;
int rc;
adj.tv_sec=1;
adj.tv_usec=500000;
rc=adjtime(&adj, &old);
if(rc==0) {
printf("adjtime() successful. "
"Olddelta = %u.%06u\n",
old.tv_sec, old.tv_usec);
}
else {
printf("adjtime() failed, errno = %d\n",errno);
return -1;
}
return 0;
I'd suggest using the date command to set the clock within a minute or
two of the correct time. You should then have no problem making a small
correction with adjtime() or ntpdate.
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