12 int run(const char *p, char *const argv[]);
13 int harvest_zombies(int pid);
14 int run_piped(const char *cmd, char *const argv[], int *readfd, int *writefd);
15 int run_piped_stream(const char *cmd, char *const argv[],
16 FILE **readf, FILE **writef);
18 extern int child_count;