From 094ca96844842928810f14844413109fc6cdd890 Mon Sep 17 00:00:00 2001
From: Eduardo Chappa <echappa@gmx.com>
Date: Sun, 3 Feb 2013 00:59:38 -0700
Subject: Initial Alpine Version

---
 pico/osdep/shell.c | 171 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 171 insertions(+)
 create mode 100644 pico/osdep/shell.c

(limited to 'pico/osdep/shell.c')

diff --git a/pico/osdep/shell.c b/pico/osdep/shell.c
new file mode 100644
index 00000000..cdb701dd
--- /dev/null
+++ b/pico/osdep/shell.c
@@ -0,0 +1,171 @@
+#if !defined(lint) && !defined(DOS)
+static char rcsid[] = "$Id: shell.c 807 2007-11-09 01:21:33Z hubert@u.washington.edu $";
+#endif
+
+/*
+ * ========================================================================
+ * Copyright 2006-2007 University of Washington
+ * Copyright 2013 Eduardo Chappa
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * ========================================================================
+ */
+
+
+#include <system.h>
+#include <general.h>
+
+#include "../estruct.h"
+#include "../mode.h"
+#include "../pico.h"
+#include "../edef.h"
+#include "../efunc.h"
+#include "../keydefs.h"
+
+#include "tty.h"
+#include "signals.h"
+
+#ifdef	_WINDOWS
+#include "mswin.h"
+#endif
+
+#include "shell.h"
+
+
+
+/* internal prototypes */
+#ifdef	SIGCONT
+RETSIGTYPE rtfrmshell(int);
+#endif
+
+
+
+#ifdef	SIGTSTP
+/*
+ *  bktoshell - suspend and wait to be woken up
+ */
+int
+bktoshell(int f, int n)
+{
+    UCS z = CTRL | 'Z';
+
+    if(!(gmode&MDSSPD)){
+	unknown_command(z);
+	return(FALSE);
+    }
+
+    if(Pmaster){
+	if(!Pmaster->suspend){
+	    unknown_command(z);
+	    return(FALSE);
+	}
+
+	if((*Pmaster->suspend)() == NO_OP_COMMAND){
+	    int rv;
+	
+	    if(km_popped){
+		term.t_mrow = 2;
+		curwp->w_ntrows -= 2;
+	    }
+
+	    clearcursor();
+	    mlerase();
+	    rv = (*Pmaster->showmsg)('x');
+	    ttresize();
+	    picosigs();
+	    if(rv)		/* Did showmsg corrupt the display? */
+	      pico_refresh(0, 1);	/* Yes, repaint */
+
+	    mpresf = 1;
+	    if(km_popped){
+		term.t_mrow = 0;
+		curwp->w_ntrows += 2;
+	    }
+	}
+	else{
+	    ttresize();
+	    pclear(0, term.t_nrow);
+	    pico_refresh(0, 1);
+	}
+
+	return(TRUE);
+    }
+
+    if(gmode&MDSPWN){
+	char *shell;
+	int   dummy;
+
+	vttidy();
+	movecursor(0, 0);
+	(*term.t_eeop)();
+	printf("\n\n\nUse \"exit\" to return to Pi%s\n",
+	       (gmode & MDBRONLY) ? "lot" : "co");
+	system((shell = (char *)getenv("SHELL")) ? shell : "/bin/csh");
+	rtfrmshell(dummy);	/* fixup tty */
+    }
+    else {
+	movecursor(term.t_nrow-1, 0);
+	peeol();
+	movecursor(term.t_nrow, 0);
+	peeol();
+	movecursor(term.t_nrow, 0);
+	printf("\n\n\nUse \"fg\" to return to Pi%s\n",
+	       (gmode & MDBRONLY) ? "lot" : "co");
+	ttclose();
+	movecursor(term.t_nrow, 0);
+	peeol();
+	(*term.t_flush)();
+
+	signal(SIGCONT, rtfrmshell);	/* prepare to restart */
+	signal(SIGTSTP, SIG_DFL);			/* prepare to stop */
+	kill(0, SIGTSTP);
+    }
+
+    return(TRUE);
+}
+#else
+#ifdef _WINDOWS
+int
+bktoshell(int f, int n)
+{
+    UCS z = CTRL | 'Z';
+
+    if(!(gmode&MDSSPD)){
+	unknown_command(z);
+	return(FALSE);
+    }
+    if(Pmaster){
+        if(!Pmaster->suspend){
+	    unknown_command(z);
+	    return(FALSE);
+	}
+	(*Pmaster->suspend)();
+	return(TRUE);
+    }
+			 
+    mswin_minimize();
+    return(TRUE);
+}
+#endif /* _WINDOWS */
+
+#endif /* SIGTSTP */
+
+#ifdef	SIGCONT
+/* 
+ * rtfrmshell - back from shell, fix modes and return
+ */
+RETSIGTYPE
+rtfrmshell(int sig)
+{
+    signal(SIGCONT, SIG_DFL);
+    ttopen();
+    ttresize();
+    pclear(0, term.t_nrow);
+    pico_refresh(0, 1);
+}
+#endif /* SIGCONT */
-- 
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