c timestamp

timestamp.c

#include <stdio.h>      // printf()
#include <time.h>      // time()
#include <sys/time.h> // localtime()

char timestamp[28];

char *now() {
   time_t t = time(NULL);
   struct tm* local_time = localtime(&t);
   struct timeval epoch;
   struct timezone tz;

   gettimeofday(&epoch, &tz);

   snprintf(timestamp, sizeof(timestamp) - 1, "%04d-%02d-%02d %02d:%02d:%02d.%06ld\n",
      local_time->tm_year + 1900, local_time->tm_mon + 1, local_time->tm_mday,
      local_time->tm_hour, local_time->tm_min, local_time->tm_sec, (unsigned long)epoch.tv_usec);

   return timestamp;   

}

int main() {
   
   printf("%s\n", now());

   return 0;
}