9os

commit d38fcc52b2502815653d1d40512dfd1a68233281
parent e5cb30ea6d186112267c66d4746ed35be04d3c67
Author: Roberto E. Vargas Caballero <k0ga@shike2.com>
Date:   Sun, 30 Aug 2020 22:46:44 +0200

devcons: Add raw mode

Console was always working in cooked mode, which
is desirable in a lot of situations, but it was
a bit nasty in hosted mode in unix system with
their own cooked mode. This patch adds a  raw mode
where the console is passed directly to the device.

Change-Id: If8704b0726b46d5b5eaf1a4b8ea7a40706b87dde

Diffstat:
M
src/kernel/dev/devcons.c
 | 
41
+++++++++++++++++++++++++++++++----------

1 file changed, 31 insertions(+), 10 deletions(-)
diff --git a/src/kernel/dev/devcons.c b/src/kernel/dev/devcons.c
@@ -14,6 +14,9 @@
 #define NAMESIZE     15
 #define CONSSTATUS   128
 
+#define RAW          0
+#define COOKED       1
+
 #define CTRL(x) ((x) & 0x1f)
 
 enum Orootqid {
@@ -35,6 +38,7 @@ static char outname[CONSOUT][NAMESIZE];
 static char buffer[LINELEN];
 static int head;
 static int tail;
+static int mode;
 
 static int
 conswalk(Chan *c, const char *name)
@@ -154,6 +158,23 @@ consdelout(void *buf, int n)
 }
 
 static int
+consmode(void *buf, int n)
+{
+	char *arg = buf;
+
+	if (!strcmp(arg, "raw")) {
+		mode = RAW;
+	} else if(!strcmp(arg, "cooked")) {
+		mode = COOKED;
+	} else {
+		errno = EINVAL;
+		return -1;
+	}
+
+	return 0;
+}
+
+static int
 conswriteraw(char *buf, int n)
 {
 	int i, idx, r;
@@ -203,7 +224,8 @@ conswrite(Chan *c, void *buf, int n)
 		{"addin", consaddin},
 		{"addout", consaddout},
 		{"delin", consdelin},
-		{"delout", consdelout}
+		{"delout", consdelout},
+		{"mode", consmode},
 	};
 
 	switch (c->qid.path) {
@@ -253,8 +275,12 @@ consreadediting(Chan *c)
 	int i;
 	char editingchar;
 
+
+	if (mode == RAW)
+		return 0;
+
 	/*
-	 * XXX: it relies on the fact that head is incremented in the
+	 * it relies on the fact that head is incremented in the
 	 * calling function after exiting this one. For example, head is
 	 * briefly equal to -1 when backspace is hit on an empty line.
 	 */
@@ -283,9 +309,6 @@ consreadediting(Chan *c)
 		conswrite(c, &editingchar, 1);
 		head = -1;
 		return 0;
-	case '\r':
-		buffer[head] = '\n';
-		break;
 	case CTRL('W'):
 		i = 0;
 		head--;
@@ -296,13 +319,11 @@ consreadediting(Chan *c)
 		conserase(c, i);
 		head -= i;
 		return 0;
+	case '\r':
+		buffer[head] = '\n';
 	default:
-		break;
+		return conswrite(c, &buffer[head], 1);
 	}
-
-	conswrite(c, &buffer[head], 1);
-
-	return 0;
 }
 
 static int