D16174.id45089.diff
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D16174.id45089.diff
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	Index: head/usr.bin/top/display.c
	===================================================================
	--- head/usr.bin/top/display.c
	+++ head/usr.bin/top/display.c
	@@ -703,6 +703,7 @@
	* respect to screen updates).
	*/

	+#define NEXT_MSG_ADDLEN 5
	static char *next_msg = NULL;
	static int msglen = 0;
	/* Invariant: msglen is always the length of the message currently displayed
	@@ -711,7 +712,7 @@
	void
	i_message(void)
	{
	- next_msg = setup_buffer(next_msg, 5);
	+ next_msg = setup_buffer(next_msg, NEXT_MSG_ADDLEN);

	while (lastline < y_message)
	{
	@@ -960,7 +961,8 @@
	va_start(args, msgfmt);

	/* first, format the message */
	- vsnprintf(next_msg, strlen(next_msg), msgfmt, args);
	+ vsnprintf(next_msg, setup_buffer_bufsiz + NEXT_MSG_ADDLEN,
	+ msgfmt, args);

	va_end(args);

	@@ -1343,6 +1345,8 @@
	}
	}

	+#define SETUPBUFFER_REQUIRED_ADDBUFSIZ 2
	+
	static char *
	setup_buffer(char *buffer, int addlen)
	{
	@@ -1350,12 +1354,15 @@

	if (NULL == buffer) {
	setup_buffer_bufsiz = screen_width;
	- b = calloc(setup_buffer_bufsiz + addlen, sizeof(char));
	+ b = calloc(setup_buffer_bufsiz + addlen +
	+ SETUPBUFFER_REQUIRED_ADDBUFSIZ,
	+ sizeof(char));
	} else {
	if (screen_width > setup_buffer_bufsiz) {
	setup_buffer_bufsiz = screen_width;
	free(buffer);
	- b = calloc(setup_buffer_bufsiz + addlen,
	+ b = calloc(setup_buffer_bufsiz + addlen +
	+ SETUPBUFFER_REQUIRED_ADDBUFSIZ,
	sizeof(char));
	} else {
	b = buffer;