Header File 

dos.h 

Category 

Time and Date Routines 

Prototype 

long dostounix(struct date *d, struct time *t); 

Description 

Converts date and time to UNIX time format. 

dostounix converts a date and time as returned from getdate and gettime into UNIX time format. d points to a date structure, and t points to a time structure containing valid date and time information. 

The date and time must not be earlier than or equal to Jan 1 1980 00:00:00. 

Return Value 

Returns UNIX version of current date and time parameters: number of seconds since 00:00:00 on January 1, 1970 (GMT). 

Example  

#include <time.h>
#include <stddef.h>
#include <dos.h>
#include <stdio.h>
int main(void)
{
  time_t t;
  struct time d_time;
  struct date d_date;
  struct tm *local;
  getdate(&d_date);
  gettime(&d_time);
  t = dostounix(&d_date, &d_time);
  local = localtime(&t);
  printf("Time and Date: %s\n", asctime(local));
  return 0;
}

Portability