Comment a accepted:
long get_uptime_in_sec(void)
{
long ret;
struct sysinfo *info =
(struct sysinfo*)malloc(sizeof(struct sysinfo));
if(sysinfo(info) < 0)
{
perror("Getting uptime");
return -1;
}
ret = info->uptime;
free(info);
return ret;
}
I just wanted to show the main concept, that the usage of uptime is
safer and more precise then the usage of local time. What about the
platforms, so I checked it on the ARM9 System running uCLinux. I don't
think sysinfo call is portable. But I think every architecture should
offer the function to obtain the uptime. GetTickCount() under Windows
for example. One can define a macro to unite all architecture dependent
system calls.
Best regards,
Yegor Yefremov
>On Mon, 2005-08-15 at 11:03 +0200, Yegor Yefremov wrote:
>> Snmpv3_local_snmpEngineTime() gives a difference between start time
and
>> now in seconds. It means when you change the year you have too big
>> difference. But actually one wants to know the time difference from
>> system start (snmpv3 engine start time).
>>
>> So I defined following function in system.c (and added a prototype to
>> system.h):
>>
>> long get_uptime_in_sec(void)
>> {
>> struct sysinfo *info =
>> (struct sysinfo*)malloc(sizeof(struct sysinfo));
>>
>> if(sysinfo(info) < 0)
>> {
>> perror("Getting uptime");
>> return -1;
>> }
>>
>> return info->uptime;
>> }
>
>Two comments/questions:
>
> a) Doesn't this introduce a memory leak?
>You appear to be allocating new memory every time that
>'get_uptime_in_sec' is called, and never releasing it.
>
> b) What architecture(s) have you tried this with?
>How portable is the 'sysinfo' call?
>
>Dave
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