busybox/scripts/test_setenv_leak.c

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#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
int main(int argc, char **argv)
{
char buf[256];
int i = argv[1] ? atoi(argv[1]) : 999999;
while (--i > 0) {
sprintf(buf, "%d", i);
setenv("VAR", buf, 1);
}
printf("Check size of [heap] mapping:\n");
freopen("/proc/self/maps", "r", stdin);
while (fgets(buf, sizeof(buf), stdin))
fputs(buf, stdout);
return 0;
}