/*
* eatmem.c -- allocate a junk of memory and make it dirty
* Copyright Harald Koenig <koenig@tat.physik.uni-tuebingen.de> 1994
*
* Permission is hereby granted to copy, modify and redistribute this code
* in terms of the GNU Library General Public License, Version 2 or later,
* at your option.
*
* to compile use
* cc -O2 -Wall -fomit-frame-pointer -s -o eatmem eatmem.c
*/


#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <signal.h>
#include <malloc.h>


int main(int argc, char *argv[])
{
int i;
char *b=NULL,*pb;
int n=(-1);
int err=0, exit_flag=0, loop_flag=0;


if (argc >= 2) {
n = atoi(argv[1]);
if (argc == 3) {
if (!strcmp(argv[2],"pause")) exit_flag = 0;
else if (!strcmp(argv[2],"exit" )) exit_flag = 1;
else if (!strcmp(argv[2],"loop" )) loop_flag = 1;
else err=1;
}
else if (argc > 3) err=1;
}
if (n<=0 || err) {
fprintf(stderr,"usage: eatmem size_in_kb [ pause | exit | loop ]\n");
exit(1);
}

b = malloc(n*1024);
if (b == NULL) {
fprintf(stderr,"malloc failed.\n");
exit(1);
}


do {
pb = b;
for (i=0; i<n; i++) {
(*pb)++;
pb += 1024;
}
} while (loop_flag);


write(1,"\007",1);
if (!exit_flag) 
kill(0,SIGSTOP);
exit(0);
}