/* Define how to access the int that the wait system call stores.
   This has been compatible in all Unix systems since time immemorial,
   but various well-meaning people have defined various different
   words for the same old bits in the same old int (sometimes claimed
   to be a struct).  We just know it's an int and we use these macros
   to access the bits.  */

/* The following macros are defined equivalently to their definitions
   in POSIX.1.  We fail to define WNOHANG and WUNTRACED, which POSIX.1
   <sys/wait.h> defines, since our code does not use waitpid().  We
   also fail to declare wait() and waitpid().  */   

#define WIFEXITED(w)	(((w)&0377) == 0)
#define WIFSIGNALED(w)	(((w)&0377) != 0177 && ((w)&~0377) == 0)
#define WIFSTOPPED(w)	(((w)&0377) == 0177)

#define WEXITSTATUS(w)	((w) >> 8)	/* same as WRETCODE */
#define WTERMSIG(w)	((w) & 0177)
#define WSTOPSIG(w)	((w) >> 8)

/* These are not defined in POSIX, but are used by our programs.  */

#define WAITTYPE	int

#define WCOREDUMP(w)	(((w)&0200) != 0)
#define WSETEXIT(w,status) ((w) = (0 | ((status) << 8)))
#define WSETSTOP(w,sig)	   ((w) = (0177 | ((sig) << 8)))