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#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 2013-2014 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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