Update tdehw-based media manager for new mount API

Allow active VT to be queried from tdm
Only display media notification messages on active VT
Hide logout action buttons if logout process unstalls

1 files changed, 75 insertions, 0 deletions

diff --git a/tdm/backend/getfd.c b/tdm/backend/getfd.c
new file mode 100644
index 000000000..3632161d3
--- /dev/null
+++ b/tdm/backend/getfd.c
@@ -0,0 +1,75 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <sys/ioctl.h>
+#include <linux/kd.h>
+#include "getfd.h"
+
+/*
+ * getfd.c
+ *
+ * Get an fd for use with kbd/console ioctls.
+ * We try several things because opening /dev/console will fail
+ * if someone else used X (which does a chown on /dev/console).
+ */
+
+static int
+is_a_console(int fd) {
+	char arg;
+
+	arg = 0;
+	return (ioctl(fd, KDGKBTYPE, &arg) == 0
+		&& ((arg == KB_101) || (arg == KB_84)));
+}
+
+static int
+open_a_console(const char *fnam) {
+	int fd;
+
+	/*
+	 * For ioctl purposes we only need some fd and permissions
+	 * do not matter. But setfont:activatemap() does a write.
+	 */
+	fd = open(fnam, O_RDWR);
+	if (fd < 0 && errno == EACCES)
+		fd = open(fnam, O_WRONLY);
+	if (fd < 0 && errno == EACCES)
+		fd = open(fnam, O_RDONLY);
+	if (fd < 0)
+		return -1;
+	if (!is_a_console(fd)) {
+		close(fd);
+		return -1;
+	}
+	return fd;
+}
+
+int getfd() {
+	int fd;
+
+	fd = open_a_console("/dev/tty");
+	if (fd >= 0)
+		return fd;
+
+	fd = open_a_console("/dev/tty0");
+	if (fd >= 0)
+		return fd;
+
+	fd = open_a_console("/dev/vc/0");
+	if (fd >= 0)
+		return fd;
+
+	fd = open_a_console("/dev/console");
+	if (fd >= 0)
+		return fd;
+
+	for (fd = 0; fd < 3; fd++)
+		if (is_a_console(fd))
+			return fd;
+
+	// "Couldnt get a file descriptor referring to the console
+	return -1;
+}
+