#include #include #include #define DEPTH 2 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; }