1 files changed, 76 insertions, 0 deletions
diff --git a/sys/etc/maideh.x b/sys/etc/maideh.x
new file mode 100644
index 00000000..d0850deb
--- /dev/null
+++ b/sys/etc/maideh.x
@@ -0,0 +1,76 @@
+# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+
+include	<xwhen.h>
+include	<syserr.h>
+include	<fset.h>
+
+define	SZ_ERRMSG	SZ_LINE
+
+# MA_IDEH -- Iraf Main routine which installs the default exception handler.
+# A single handler processes all exceptions.
+
+procedure ma_ideh()
+
+extern	xstdexh()
+int	junk, i, epa_standard_handler
+int	exception[4]
+data	exception /X_ACV, X_INT, X_ARITH, X_IPC/
+
+begin
+	call zlocpr (xstdexh, epa_standard_handler)
+	do i = 1, 4
+	    call xwhen (exception[i], epa_standard_handler, junk)
+
+	# Initialize the critical section protection stack.
+	call intr_reset()
+end
+
+
+# XSTDEXH -- Standard exception handler.  Unless the user code posts a handler
+# for a particular exception, this handler will gain control.
+
+procedure xstdexh (exception, next_handler)
+
+int	exception			# code for exception
+int	next_handler			# EPA of next handler to be called
+
+char	os_errmsg[SZ_ERRMSG]
+int	os_errcode
+
+begin
+	# Get OS description of the exception.
+	call zxgmes (os_errcode, os_errmsg, SZ_ERRMSG)
+	call strupk (os_errmsg, os_errmsg, SZ_ERRMSG)
+
+	# Cancel any output and resync awaits.
+	call fseti (STDOUT, F_CANCEL, OK)
+	call fseti (CLOUT, F_CANCEL, OK)
+	call fseti (CLIN, F_CANCEL, OK)
+
+	# Set this here as error() will return immediately if it comes back.
+	next_handler = X_IGNORE
+
+	# Take error action.
+	switch (exception) {
+	case X_ACV:
+	    if (os_errcode > 0)
+		call fatal (SYS_XACV, os_errmsg)
+	    else
+		call fatal (SYS_XACV, "Access violation")
+	case X_ARITH:
+	    if (os_errcode > 0)
+		call fatal (SYS_XARITH, os_errmsg)
+	    else
+		call fatal (SYS_XARITH, "Arithmetic exception")
+	case X_INT:
+	    if (os_errcode > 0)
+		call fatal (SYS_XINT, os_errmsg)
+	    else
+		call fatal (SYS_XINT, "Keyboard interrupt")
+	case X_IPC:
+	    call fatal (SYS_XIPC, "Write to IPC with no reader")
+
+	default:
+	    call fatal (ERR, "Unknown exception")
+	}
+end