Counting files in a given directory Post: 302472142

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Top Forums UNIX for Advanced & Expert Users Counting files in a given directory Post 302472142 by Corona688 on Tuesday 16th of November 2010 11:30:09 AM

11-16-2010

Registered User

Anything that counts files will have to do so the same way: checking directory entries. So there's no special "faster ls". (If there was, why wouldn't we use it for everything?)

If you can compile on this machine, this program can provide a running total, updated once a second:

Code:

#include <stdio.h>
#include <time.h>

int lines=0;

int main(void)
{
	time_t timer=time(NULL);
	char buf[16384];
	while(fgets(buf, 16384, stdin) != NULL)
	{
		lines++;

		if((time(NULL)-timer) > 1)
		{
			fprintf(stderr, "\r%d", lines);
			timer=time(NULL);
		}
	}

	printf("%d\n", lines);

	return(0);
}

It only reads from stdin.

---------- Post updated at 10:30 AM ---------- Previous update was at 10:26 AM ----------

Quote:

Originally Posted by verdepollo

I'm still trying to figure out how to count those files. It would be enough for me if I could find out an approximate value, and not the exact number.

Very approximate since it includes directory entries as well, but since counting 4 million files is going to be hard, it might have to do.

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LEARN ABOUT DEBIAN

tau_profile_timer_dynamic

TAU_PROFILE_TIMER_DY(3) 				      TAU Instrumentation API					   TAU_PROFILE_TIMER_DY(3)

NAME

       TAU_PROFILE_TIMER_DYNAMIC - Defines a dynamic timer.

SYNOPSIS

       C/C++:

       TAU_PROFILE_TIMER_DYNAMIC(Profiler timer, char* or string& function_name, char* or string& type, TauGroup_t group);

       Fortran:

       TAU_PROFILE_TIMER_DYNAMIC(integer profiler(2), character name(size));

DESCRIPTION

       TAU_PROFILE_TIMER_DYNAMIC operates similar to TAU_PROFILE_TIMER except that the timer is created each time the statement is invoked. This
       way, the name of the timer can be different for each execution.

EXAMPLE

       C/C++ :

       int main(int argc, char **argv) {
	 int i;
	 TAU_PROFILE_TIMER(t,"main()", "", TAU_DEFAULT);
	 TAU_PROFILE_SET_NODE(0);
	 TAU_PROFILE_START(t);

	 for (i=0; i&5; i++) {
	   char buf[32];
	   sprintf(buf, "Iteration %d", i);

	   TAU_PROFILE_TIMER_DYNAMIC(timer, buf, "", TAU_USER);
	   TAU_PROFILE_START(timer);
	   printf("Iteration %d
", i);
	   f1();

	   TAU_PROFILE_STOP(timer);
	 }
	 return 0;
       }

       Fortran :

       subroutine ITERATION(val)
	 integer val
	 character(13) cvar
	 integer profiler(2) / 0, 0 /
	 save profiler

	 print *, "Iteration ", val

	 write (cvar,'(a9,i2)') 'Iteration', val
	 call TAU_PROFILE_TIMER_DYNAMIC(profiler, cvar)
	 call TAU_PROFILE_START(profiler)

	 call F1()
	 call TAU_PROFILE_STOP(profiler)
	 return
       end

SEE ALSO

       TAU_PROFILE_TIMER(3), TAU_PROFILE_START(3), TAU_PROFILE_STOP(3)

								    08/31/2005						   TAU_PROFILE_TIMER_DY(3)