Thread: Date manipulation

Hello All,

Once more I'm asking for some help from all gurus. I've searched for some help in the history but with now sucess.

I'm trying to open a file named file_YYYYMMDD.txt.
Ex: file_20050225.txt

To open the file, I get the date (YMD). There is no problem with getting the date. The problem is that I need to get the date not from now but from now-5minutes. Here is my code:

Code:

#include <time.h>

main()
{

  char s[50];
  size_t i;
  struct tm tim;
  time_t now;

  now = time(NULL);
  tim = *(localtime(&now));
  i = strftime(s,50,"%b %d, %Y; %H:%M:%S",&tim);
  printf("time: [%s]\n",s);
  printf("now: [%d]\n",now);

}

My output is:

time: [Feb 25, 2005; 14:16:27]
now: [1109351787]

Can anyone help me finding a solution on how to get the date - 5 minutes ? Like this:

time: [Feb 25, 2005; 14:16:27]
now: [1109351787]

time2: [Feb 25, 2005; 14:11:27]
now2: [1109351487]


Thanks in advance,

Realy a dont know how I was missing this !

Anyway, thanks alot for the help ! My code now is:

Code:

#include <time.h>

main()
{

  char s[50],s2[50];
  size_t i;
  size_t i2;
  struct tm tim;
  struct tm tim2;
  time_t now;
  time_t now2;

  now = time(NULL);
  now2 = now - (5 * 60);
  tim = *(localtime(&now));
  tim2 = *(localtime(&now2));
  i = strftime(s,50,"%b %d, %Y; %H:%M:%S",&tim);
  i2 = strftime(s2,50,"%b %d, %Y; %H:%M:%S",&tim2);
  printf("time: [%s]\n",s);
  printf("now: [%d]\n\n",now);
  printf("time2: [%s]\n",s2);
  printf("now2: [%d]\n",now2);

}

and works well !

About running every 5 minutes, this is a daemon that sleeps for 5 seconds and reads the file again !

Once more, thanks !