59 lines
1.1 KiB
C
Executable File
59 lines
1.1 KiB
C
Executable File
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
#include <sys/types.h>
|
|
#include <errno.h>
|
|
|
|
void
|
|
str_to_ll(char *str, long long *num)
|
|
{
|
|
errno = 0;
|
|
char *endptr;
|
|
*num = strtoll(str, &endptr, 10);
|
|
|
|
if (*endptr || errno || endptr == str) {
|
|
fprintf(stderr, "Invalid number: %s\n", str);
|
|
exit(1); // TODO: по-хорошему заменить на внешний обработчик ошибок
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
void
|
|
make_proc(int deepth, int max_deepth)
|
|
{
|
|
if (deepth == max_deepth) {
|
|
return;
|
|
}
|
|
|
|
printf("Deepth: %d\n", deepth);
|
|
|
|
pid_t pid = fork();
|
|
if (pid < 0) {
|
|
fprintf(stderr, "Fork failed\n");
|
|
exit(1);
|
|
} else if (pid == 0) {
|
|
make_proc(deepth + 1, max_deepth);
|
|
exit(0);
|
|
} else {
|
|
wait(NULL);
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
int
|
|
main(int argc, char *argv[])
|
|
{
|
|
if (argc != 2) {
|
|
fprintf(stderr, "Usage: %s <deepth>\n", argv[0]);
|
|
return 1;
|
|
}
|
|
|
|
long long deepth;
|
|
str_to_ll(argv[1], &deepth);
|
|
make_proc(0, deepth);
|
|
|
|
return 0;
|
|
}
|