#include <errno.h> #include <sys/syscall.h> #include <signal.h> static inline _syscall2(int, clone, int, flags, int, foo) main() { int pid = clone(0x20000 | SIGCHLD,0); int res; if (pid == -1) exit(-1); if (pid == 0) system("sh"); else waitpid(pid, &res, 0); }