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sortix--sortix/utils/uptime.cpp

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#include <stdio.h>
#include <unistd.h>
size_t Seconds(uintmax_t usecs)
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{
return (usecs / (1000ULL * 1000ULL)) % (60ULL);
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}
size_t Minutes(uintmax_t usecs)
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{
return (usecs / (1000ULL * 1000ULL * 60ULL)) % (60ULL);
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}
size_t Hours(uintmax_t usecs)
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{
return (usecs / (1000ULL * 1000ULL * 60ULL * 60ULL)) % (24ULL);
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}
size_t Days(uintmax_t usecs)
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{
return usecs / (1000ULL * 1000ULL * 60ULL * 60ULL * 24ULL);
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}
void PrintElement(size_t num, const char* single, const char* multiple)
{
static const char* prefix = "";
if ( !num ) { return; }
const char* str = (num>1) ? multiple : single;
printf("%s%zu %s", prefix, num, str);
prefix = ", ";
}
int main(int argc, char* argv[])
{
uintmax_t usecssinceboot;
if ( uptime(&usecssinceboot) ) { perror("uptime"); return 1; }
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PrintElement(Days(usecssinceboot), "day", "days");
PrintElement(Hours(usecssinceboot), "hour", "hours");
PrintElement(Minutes(usecssinceboot), "min", "mins");
PrintElement(Seconds(usecssinceboot), "sec", "secs");
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printf("\n");
return 0;
}