Init

usr.lib/libcurses/screen/resetshell.c

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+#ifndef lint
+static	char sccsid[] = "@(#)resetshell.c 1.1 94/10/31 SMI"; /* from S5R2 1.1 */
+#endif
+
+#include "curses.ext"
+#include "../local/uparm.h"
+
+extern	struct term *cur_term;
+
+#ifdef DIOCSETT
+/*
+ * Disable CB/UNIX virtual terminals.
+ * This really should be a field in the cur_term structure, but
+ * I didn't do it that way because I'm trying to make ex fit.
+ * If you're using virtual terminals on a 32 bit machine it
+ * probably makes sense to change it.
+ */
+static struct termcb new, old;
+#endif
+#ifdef LTILDE
+static int newlmode, oldlmode;
+#endif
+
+/*
+ * Getting the baud rate is different on the two systems.
+ * In either case, a baud rate of 0 hangs up the phone.
+ * Since things are often initialized to 0, getting the phone
+ * hung up on you is a common result of a bug in your program.
+ * This is not very friendly, so if the baud rate is 0, we
+ * assume we're doing a reset_xx_mode with no def_xx_mode, and
+ * just don't do anything.
+ */
+#ifdef USG
+#define BR(x) (cur_term->x.c_cflag&CBAUD)
+#else
+#define BR(x) (cur_term->x.sg_ispeed)
+#endif
+
+reset_shell_mode()
+{
+#ifdef DIOCSETT
+	/*
+	 * Restore any virtual terminal setting.  This must be done
+	 * before the TIOCSETN because DIOCSETT will clobber flags like xtabs.
+	 */
+	old.st_flgs |= TM_SET;
+	ioctl(2, DIOCSETT, &old);
+#endif
+	if (BR(Ottyb)) {
+		ioctl(cur_term -> Filedes,
+#ifdef USG
+			TCSETAW,
+#else
+			TIOCSETN,
+#endif
+			&(cur_term->Ottyb));
+# ifdef LTILDE
+	if (newlmode != oldlmode)
+		ioctl(cur_term -> Filedes, TIOCLSET, &oldlmode);
+# endif
+	}
+}