From: Ben Gras <ben@minix3.org>
Date: Mon, 6 Apr 2009 09:39:42 +0000 (+0000)
Subject: don't flush output for SIGWINCH. found by Joren l'Ami.
X-Git-Tag: v3.1.4~78
X-Git-Url: http://zhaoyanbai.com/repos/%22http:/www.isc.org/icons/zlib_tech.html?a=commitdiff_plain;h=4cd6875d05dcba63a8e9641ce70626cb6c1afea7;p=minix.git

don't flush output for SIGWINCH. found by Joren l'Ami.
---

diff --git a/drivers/tty/keyboard.c b/drivers/tty/keyboard.c
index 8fc9176f4..018ce0118 100644
--- a/drivers/tty/keyboard.c
+++ b/drivers/tty/keyboard.c
@@ -609,9 +609,9 @@ int try;
 	    switch(ch) {
   		case CF1: show_key_mappings(); break; 
   		case CF3: toggle_scroll(); break; /* hardware <-> software */	
-  		case CF7: sigchar(&tty_table[CONSOLE], SIGQUIT); break;
-  		case CF8: sigchar(&tty_table[CONSOLE], SIGINT); break;
-  		case CF9: sigchar(&tty_table[CONSOLE], SIGKILL); break;
+  		case CF7: sigchar(&tty_table[CONSOLE], SIGQUIT, 1); break;
+  		case CF8: sigchar(&tty_table[CONSOLE], SIGINT, 1); break;
+  		case CF9: sigchar(&tty_table[CONSOLE], SIGKILL, 1); break;
   	    }
 	}
   }
diff --git a/drivers/tty/pty.c b/drivers/tty/pty.c
index ca408d691..d7949f8c5 100644
--- a/drivers/tty/pty.c
+++ b/drivers/tty/pty.c
@@ -172,7 +172,7 @@ message *m_ptr;
 		pp->state = 0;
 	} else {
 		pp->state |= PTY_CLOSED;
-		sigchar(tp, SIGHUP);
+		sigchar(tp, SIGHUP, 1);
 	}
 	break;
 
diff --git a/drivers/tty/rs232.c b/drivers/tty/rs232.c
index aed377b25..306624042 100644
--- a/drivers/tty/rs232.c
+++ b/drivers/tty/rs232.c
@@ -612,7 +612,7 @@ int try;
 	rs->ostate &= ~ODEVHUP;		/* save ostate, clear DEVHUP */
 	unlock();
 	if (ostate & ODEVHUP) {
-		sigchar(tp, SIGHUP);
+		sigchar(tp, SIGHUP, 1);
 		tp->tty_termios.c_ospeed = B0;	/* Disable further I/O. */
 		return 0;
 	}
diff --git a/drivers/tty/tty.c b/drivers/tty/tty.c
index 537109996..c87301fa3 100644
--- a/drivers/tty/tty.c
+++ b/drivers/tty/tty.c
@@ -672,7 +672,7 @@ int safe;
 	   r = sys_vircopy( m_ptr->IO_ENDPT, D, (vir_bytes) m_ptr->ADDRESS,
 		SELF, D, (vir_bytes) &tp->tty_winsize, (vir_bytes) size);
 	}
-	sigchar(tp, SIGWINCH);
+	sigchar(tp, SIGWINCH, 0);
 	break;
 
 #if (MACHINE == IBM_PC)
@@ -1097,7 +1097,7 @@ int count;			/* number of input characters */
 					|| ch == tp->tty_termios.c_cc[VQUIT]) {
 			sig = SIGINT;
 			if (ch == tp->tty_termios.c_cc[VQUIT]) sig = SIGQUIT;
-			sigchar(tp, sig);
+			sigchar(tp, sig, 1);
 			(void) tty_echo(tp, ch);
 			continue;
 		}
@@ -1445,7 +1445,7 @@ tty_t *tp;
   }
 
   /* Setting the output speed to zero hangs up the phone. */
-  if (tp->tty_termios.c_ospeed == B0) sigchar(tp, SIGHUP);
+  if (tp->tty_termios.c_ospeed == B0) sigchar(tp, SIGHUP, 1);
 
   /* Set new line speed, character size, etc at the device level. */
   (*tp->tty_ioctl)(tp, 0);
@@ -1489,9 +1489,10 @@ int status;			/* reply code */
 /*===========================================================================*
  *				sigchar					     *
  *===========================================================================*/
-PUBLIC void sigchar(tp, sig)
+PUBLIC void sigchar(tp, sig, mayflush)
 register tty_t *tp;
 int sig;			/* SIGINT, SIGQUIT, SIGKILL or SIGHUP */
+int mayflush;
 {
 /* Process a SIGINT, SIGQUIT or SIGKILL char from the keyboard or SIGHUP from
  * a tty close, "stty 0", or a real RS-232 hangup.  MM will send the signal to
@@ -1506,7 +1507,7 @@ int sig;			/* SIGINT, SIGQUIT, SIGKILL or SIGHUP */
       }
   }
 
-  if (!(tp->tty_termios.c_lflag & NOFLSH)) {
+  if (mayflush && !(tp->tty_termios.c_lflag & NOFLSH)) {
 	tp->tty_incount = tp->tty_eotct = 0;	/* kill earlier input */
 	tp->tty_intail = tp->tty_inhead;
 	(*tp->tty_ocancel)(tp, 0);			/* kill all output */
diff --git a/drivers/tty/tty.h b/drivers/tty/tty.h
index d2add8448..7defd7719 100644
--- a/drivers/tty/tty.h
+++ b/drivers/tty/tty.h
@@ -148,7 +148,7 @@ extern struct kmessages kmess;
 /* Function prototypes for TTY driver. */
 /* tty.c */
 _PROTOTYPE( void handle_events, (struct tty *tp)			);
-_PROTOTYPE( void sigchar, (struct tty *tp, int sig)			);
+_PROTOTYPE( void sigchar, (struct tty *tp, int sig, int mayflush)	);
 _PROTOTYPE( void tty_task, (void)					);
 _PROTOTYPE( int in_process, (struct tty *tp, char *buf, int count)	);
 _PROTOTYPE( void out_process, (struct tty *tp, char *bstart, char *bpos,