kernel: pass more information to user on interrupt

This is meant to facilitate a syscall for returning from interrupts, which
will actually work in the general case as opposed to the current hack, which
only works if the interrupt occured during a syscall (which is correct... for
now).

3 files changed, 10 insertions, 5 deletions

diff --git a/src/cmd/init/driver/termcook.c b/src/cmd/init/driver/termcook.c
index e0edcf5..ed851e3 100644
--- a/src/cmd/init/driver/termcook.c
+++ b/src/cmd/init/driver/termcook.c
@@ -77,7 +77,7 @@ static void line_editor(void *) {
 					}
 					break;
 				case 3: /* C-c */
-					send_intr("");
+					send_intr("C-c");
 					break;
 				case 0x1c: /* C-\ */
 					send_intr("kill");
diff --git a/src/cmd/init/init.c b/src/cmd/init/init.c
index 0a64054..9caa283 100644
--- a/src/cmd/init/init.c
+++ b/src/cmd/init/init.c
@@ -68,9 +68,10 @@ void redirect(const char *exe, const char *out, const char *in) {
 	}
 }
 
-void shutdown(void) {
-	printf("[init] intr\n");
-	_sys_intr(NULL, 0);
+void shutdown(struct intr_data *data) {
+	const char *msg = "impending shutdown";
+	printf("[init] shutdown with message: %s\n", data->msg);
+	_sys_intr(msg, strlen(msg));
 	_sys_sleep(1000);
 	printf("[init] filicide\n");
 	_sys_filicide();
diff --git a/src/cmd/shell/shell.c b/src/cmd/shell/shell.c
index 9afdb5c..15cb6ed 100644
--- a/src/cmd/shell/shell.c
+++ b/src/cmd/shell/shell.c
@@ -139,10 +139,14 @@ static void run(char *cmd) {
 	}
 }
 
+static void intr(struct intr_data *intr) {
+	fprintf(stderr, "%s: got interrupt: %s\n", getprogname(), intr->msg);
+}
+
 int main(int argc, char **argv) {
 	static char buf[256];
 	FILE *f = stdin;
-	intr_set(NULL);
+	intr_set(intr);
 
 	if (argc > 1) {
 		f = fopen(argv[1], "r");