From: Ben Gras <ben@minix3.org>
Date: Mon, 3 Oct 2005 12:03:57 +0000 (+0000)
Subject: Add SIGWINCH signal and functionality in tty and support in PM.
X-Git-Tag: v3.1.2a~675
X-Git-Url: http://zhaoyanbai.com/repos/%22http:/www.isc.org/icons/zpipe.c?a=commitdiff_plain;h=8c4166ee85b175953b09e54fefa75f49cfaca5e2;p=minix.git

Add SIGWINCH signal and functionality in tty and support in PM.
---

diff --git a/drivers/tty/tty.c b/drivers/tty/tty.c
index ea3cdb9a1..4034a0b93 100644
--- a/drivers/tty/tty.c
+++ b/drivers/tty/tty.c
@@ -646,7 +646,7 @@ message *m_ptr;			/* pointer to message sent to task */
     case TIOCSWINSZ:
 	r = sys_vircopy( m_ptr->PROC_NR, D, (vir_bytes) m_ptr->ADDRESS,
 		SELF, D, (vir_bytes) &tp->tty_winsize, (vir_bytes) size);
-	/* SIGWINCH... */
+	sigchar(tp, SIGWINCH);
 	break;
 
 #if ENABLE_SRCCOMPAT
diff --git a/include/signal.h b/include/signal.h
index f813ffb43..f88b27b37 100755
--- a/include/signal.h
+++ b/include/signal.h
@@ -25,8 +25,6 @@ typedef unsigned long sigset_t;
 #endif
 #endif
 
-#define _NSIG             20	/* number of signals used */
-
 #define SIGHUP             1	/* hangup */
 #define SIGINT             2	/* interrupt (DEL) */
 #define SIGQUIT            3	/* quit (ASCII FS) */
@@ -55,6 +53,11 @@ typedef unsigned long sigset_t;
 #define SIGKSIG    	  19	/* kernel signal pending */
 #define SIGKSTOP    	  20	/* kernel shutting down */
 
+/* Regular signals. */
+#define SIGWINCH    	  21	/* window size has changed */
+
+#define _NSIG             21	/* number of signals used */
+
 /* POSIX requires the following signals to be defined, even if they are
  * not supported.  Here are the definitions, but they are not supported.
  */
diff --git a/servers/pm/main.c b/servers/pm/main.c
index 04e98843b..66731e601 100644
--- a/servers/pm/main.c
+++ b/servers/pm/main.c
@@ -154,7 +154,7 @@ PRIVATE void pm_init()
   register struct boot_image *ip;
   static char core_sigs[] = { SIGQUIT, SIGILL, SIGTRAP, SIGABRT,
 			SIGEMT, SIGFPE, SIGUSR1, SIGSEGV, SIGUSR2 };
-  static char ign_sigs[] = { SIGCHLD };
+  static char ign_sigs[] = { SIGCHLD, SIGWINCH };
   register struct mproc *rmp;
   register char *sig_ptr;
   phys_clicks total_clicks, minix_clicks, free_clicks;
diff --git a/servers/pm/signal.c b/servers/pm/signal.c
index 621828b1f..b2bc1a649 100644
--- a/servers/pm/signal.c
+++ b/servers/pm/signal.c
@@ -244,15 +244,16 @@ sigset_t sig_map;
   /* Check each bit in turn to see if a signal is to be sent.  Unlike
    * kill(), the kernel may collect several unrelated signals for a
    * process and pass them to PM in one blow.  Thus loop on the bit
-   * map. For SIGINT and SIGQUIT, use proc_id 0 to indicate a broadcast
-   * to the recipient's process group.  For SIGKILL, use proc_id -1 to
-   * indicate a systemwide broadcast.
+   * map. For SIGINT, SIGWINCH and SIGQUIT, use proc_id 0 to indicate
+   * a broadcast to the recipient's process group.  For SIGKILL, use
+   * proc_id -1 to indicate a systemwide broadcast.
    */
   for (i = 1; i <= _NSIG; i++) {
 	if (!sigismember(&sig_map, i)) continue;
 	switch (i) {
 	    case SIGINT:
 	    case SIGQUIT:
+	    case SIGWINCH:
 		id = 0; break;	/* broadcast to process group */
 	    case SIGKILL:
 		id = -1; break;	/* broadcast to all except INIT */