《操作系统》的实验代码。
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37 regels
556 B

#include <ulib.h>
#include <stdio.h>
#include <string.h>
#define DEPTH 4
void forktree(const char *cur);
void
forkchild(const char *cur, char branch) {
char nxt[DEPTH + 1];
if (strlen(cur) >= DEPTH)
return;
snprintf(nxt, DEPTH + 1, "%s%c", cur, branch);
if (fork() == 0) {
forktree(nxt);
yield();
exit(0);
}
}
void
forktree(const char *cur) {
cprintf("%04x: I am '%s'\n", getpid(), cur);
forkchild(cur, '0');
forkchild(cur, '1');
}
int
main(void) {
forktree("");
return 0;
}