1 files changed, 63 insertions, 0 deletions
diff --git a/include/wait.h b/include/wait.h
new file mode 100644
index 000000000..fa3c9ccb1
--- /dev/null
+++ b/include/wait.h
@@ -0,0 +1,63 @@
+/* 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().  */   
+
+#ifndef	WIFEXITED
+#define WIFEXITED(w)	(((w)&0377) == 0)
+#endif
+
+#ifndef	WIFSIGNALED
+#define WIFSIGNALED(w)	(((w)&0377) != 0177 && ((w)&~0377) == 0)
+#endif
+
+#ifndef	WIFSTOPPED
+#ifdef IBM6000
+
+/* Unfortunately, the above comment (about being compatible in all Unix 
+   systems) is not quite correct for AIX, sigh.  And AIX 3.2 can generate
+   status words like 0x57c (sigtrap received after load), and gdb would
+   choke on it. */
+
+#define WIFSTOPPED(w)	((w)&0x40)
+
+#else
+#define WIFSTOPPED(w)	(((w)&0377) == 0177)
+#endif
+#endif
+
+#ifndef	WEXITSTATUS
+#define WEXITSTATUS(w)	(((w) >> 8) & 0377) /* same as WRETCODE */
+#endif
+
+#ifndef	WTERMSIG
+#define WTERMSIG(w)	((w) & 0177)
+#endif
+
+#ifndef	WSTOPSIG
+#define WSTOPSIG	WEXITSTATUS
+#endif
+
+/* These are not defined in POSIX, but are used by our programs.  */
+
+#define WAITTYPE	int
+
+#ifndef	WCOREDUMP
+#define WCOREDUMP(w)	(((w)&0200) != 0)
+#endif
+
+#ifndef	WSETEXIT
+#define WSETEXIT(w,status) ((w) = (0 | ((status) << 8)))
+#endif
+
+#ifndef	WSETSTOP
+#define WSETSTOP(w,sig)	   ((w) = (0177 | ((sig) << 8)))
+#endif
+