#include #include pid_t wait(int *wstatus) { return waitpid( -1, wstatus, 0 ); } pid_t waitpid( pid_t pid, int *wstatus, int options ) { return __libc_wait4( pid, wstatus, options, 0 ); } pid_t wait3( int *wstatus, int options, struct rusage *rusage ) { return __libc_wait4( -1, wstatus, options, rusage ); }