Colm MacCarthaigh wrote:
> On Tue, Nov 06, 2001 at 05:54:37PM +0000, Padraig Brady wrote:
>>>I can't beleive there isn't a platform independent
>>getSecondsSinceBoot() function, but can't find one.
>>Please tell me I'm wrong.
>>>>>> use the wtmp :)
>> #include <utmp.h>
> #include <strings.h>
>> time_t bt;
> struct utmp u;
> int fd;
>>> if((fd=open("/var/run/wtmp", O_RDONLY)) < 0)
> /* handle error */
>> /* set it to all zero's */
> bzero(bt, sizeof(bt));
>> while(read(fd, &u, sizeof(u)) == sizeof(u))
> if(u.ut_type == BOOT_TIME)
> bt = u.ut_time; /* ut_time is a portable macro */
>> /* dont break, we want last entry that matches */
This just gives the boot time (in seconds since 1970) as far
as I can tell. Hence not what I want. I want the actual number
of seconds elapsed since boot, and I can't use BOOT_TIME-time(0)
as if the system date changes, this will be inaccurate.
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