Import sources from 2011-03-30 iso image

1 files changed, 71 insertions, 0 deletions

diff --git a/sys/src/cmd/vt/consctl.c b/sys/src/cmd/vt/consctl.c
new file mode 100755
index 000000000..525bbb664
--- /dev/null
+++ b/sys/src/cmd/vt/consctl.c
@@ -0,0 +1,71 @@
+#include <u.h>
+#include <libc.h>
+#include <draw.h>
+#include "cons.h"
+
+/*
+ *  bind a pipe onto consctl and keep reading it to
+ *  get changes to console state.
+ */
+Consstate*
+consctl(void)
+{
+	int i, n, fd, tries;
+	char buf[128];
+	Consstate *x;
+	char *field[10];
+
+	x = segattach(0, "shared", 0, sizeof *x);
+	if(x == (void*)-1)
+		sysfatal("segattach: %r");
+
+	/* a pipe to simulate consctl */
+	if(bind("#|", "/mnt/cons/consctl", MBEFORE) < 0
+	|| bind("/mnt/cons/consctl/data1", "/dev/consctl", MREPL) < 0)
+		sysfatal("bind consctl: %r");
+
+	/* a pipe to simulate the /dev/cons */
+	if(bind("#|", "/mnt/cons/cons", MREPL) < 0
+	|| bind("/mnt/cons/cons/data1", "/dev/cons", MREPL) < 0)
+		sysfatal("bind cons: %r");
+
+	switch(fork()){
+	case -1:
+		sysfatal("fork: %r");
+	case 0:
+		break;
+	default:
+		return x;
+	}
+
+	notify(0);
+
+	for(tries = 0; tries < 100; tries++){
+		x->raw = 0;
+		x->hold = 0;
+		fd = open("/mnt/cons/consctl/data", OREAD);
+		if(fd < 0)
+			break;
+		tries = 0;
+		for(;;){
+			n = read(fd, buf, sizeof(buf)-1);
+			if(n <= 0)
+				break;
+			buf[n] = 0;
+			n = getfields(buf, field, 10, 1, " ");
+			for(i = 0; i < n; i++){
+				if(strcmp(field[i], "rawon") == 0)
+					x->raw = 1;
+				else if(strcmp(field[i], "rawoff") == 0)
+					x->raw = 0;
+				else if(strcmp(field[i], "holdon") == 0)
+					x->hold = 1;
+				else if(strcmp(field[i], "holdoff") == 0)
+					x->hold = 0;
+			}
+		}
+		close(fd);
+	}
+	exits(0);
+	return 0;		/* dummy to keep compiler quiet*/
+}