as rich copied from mike

diff --git a/include/wait.h b/include/wait.h
new file mode 100644 (file)
index 0000000..339c2eb
--- /dev/null
+++ b/include/wait.h
@@ -0,0 +1,27 @@
+
+/* Define how to access the structure that the wait system call stores.
+   On many systems, there is a structure defined for this.
+   But on vanilla-ish USG systems there is not.  */
+
+#ifndef HAVE_WAIT_STRUCT
+#define WAITTYPE int
+#define WIFSTOPPED(w) (((w)&0377) == 0177)
+#define WIFSIGNALED(w) (((w)&0377) != 0177 && ((w)&~0377) == 0)
+#define WIFEXITED(w) (((w)&0377) == 0)
+#define WRETCODE(w) ((w) >> 8)
+#define WSTOPSIG(w) ((w) >> 8)
+#define WCOREDUMP(w) (((w)&0200) != 0)
+#define WTERMSIG(w) ((w) & 0177)
+#define WSETEXIT(w, status) ((w) = (status))
+#define WSETSTOP(w,sig)  ((w) = (0177 | ((sig) << 8)))
+#else
+#include <sys/wait.h>
+#define WAITTYPE union wait
+#define WRETCODE(w) (w).w_retcode
+#define WSTOPSIG(w) (w).w_stopsig
+#define WCOREDUMP(w) (w).w_coredump
+#define WTERMSIG(w) (w).w_termsig
+#define WSETEXIT(w, status) ((w).w_status = (status))
+#define WSETSTOP(w,sig)  \
+  ((w).w_stopsig = (sig), (w).w_coredump = 0, (w).w_termsig = 0177)
+#endif