1 files changed, 134 insertions, 0 deletions
diff --git a/toys/pending/openvt.c b/toys/pending/openvt.c
new file mode 100644
index 00000000..5aecd945
--- /dev/null
+++ b/toys/pending/openvt.c
@@ -0,0 +1,134 @@
+/* openvt.c - Run a program on a new VT
+ *
+ * Copyright 2014 Vivek Kumar Bhagat <vivek.bhagat89@gmail.com>
+ *
+ * No Standard
+
+USE_OPENVT(NEWTOY(openvt, "c#<1>63sw", TOYFLAG_BIN|TOYFLAG_NEEDROOT))
+
+config OPENVT
+  bool "openvt"
+  default n
+  help
+    usage: openvt [-c N] [-s] [-w] [--] [command [command_options]]
+
+    start a program on a new virtual terminal (VT)
+
+    -c N  Use VT N
+    -s    Switch to new VT
+    -w    Wait for command to exit
+          if -s and -w option used together, switch back
+          to originating VT when command completes
+*/
+
+#define FOR_openvt
+#include "toys.h"
+#include <linux/vt.h>
+#include <linux/kd.h>
+
+GLOBALS(
+	unsigned long vt_num;
+)
+
+int find_console_fd(void)
+{
+	char *console_name[] = {"/dev/tty", "/dev/tty0", "/dev/console"};
+	int i;
+	int fd;
+	char arg;
+
+	for (i = 0; i < 3; i++) {
+		fd = open(console_name[i], O_RDWR);
+		if (fd < 0 && errno == EACCES)
+			fd = open(console_name[i], O_RDONLY);
+
+		if (fd < 0 && errno == EACCES)
+			fd = open(console_name[i], O_WRONLY);
+
+		if (fd >= 0) {
+			arg = 0;
+			if (0 == ioctl(fd, KDGKBTYPE, &arg))
+				return fd;
+			else
+				close(fd);
+		}
+	}
+
+	/* check std fd 0, 1 and 2 */
+	for (fd = 0; fd < 3; fd++) {
+		arg = 0;
+		if (0 == ioctl(fd, KDGKBTYPE, &arg))
+			return fd;
+	}
+
+	return -1;
+}
+
+int xvtnum(int fd)
+{
+	int ret;
+
+	ret = ioctl(fd, VT_OPENQRY, (int *)&TT.vt_num);
+	if (ret != 0 || TT.vt_num <= 0) perror_exit("can't find open VT");
+
+	return TT.vt_num;
+}
+
+void openvt_main(void)
+{
+	int fd = -1, vt_fd = -1, pid, ret = 0;
+	struct vt_stat vstate;
+
+	if (!(toys.optflags & FLAG_c)) {
+		// check if fd 0,1 or 2 is already opened
+		for (fd = 0; fd < 3; fd++)
+			if (!ioctl(fd, VT_GETSTATE, &vstate)) {
+				ret = xvtnum(fd);
+				break;
+			}
+
+		// find VT number using /dev/console
+		if (!ret) {
+			fd = xopen("/dev/console", O_RDONLY | O_NONBLOCK);
+			xioctl(fd, VT_GETSTATE, &vstate);
+			xvtnum(fd);
+		}
+	}
+
+	sprintf(toybuf, "/dev/tty%lu", TT.vt_num);
+	fd = find_console_fd();
+	xioctl(fd, VT_GETSTATE, &vstate);
+
+	close(0);	//new vt becomes stdin
+	vt_fd = xopen(toybuf, O_RDWR);
+	if (toys.optflags & FLAG_s) {
+		ioctl(vt_fd, VT_ACTIVATE, TT.vt_num);
+		ioctl(vt_fd, VT_WAITACTIVE, TT.vt_num);
+	}
+
+	close(1);
+	close(2);
+	dup2(vt_fd, 1);
+	dup2(vt_fd, 2);
+	while (vt_fd > 2)
+		close(vt_fd--);
+
+	pid = vfork();
+	if (pid < 0)	perror_exit("Fork failed");
+	else if (!pid) {
+		setsid();
+		ioctl(vt_fd, TIOCSCTTY, 0);
+		xexec(toys.optargs);
+	}
+
+	if (toys.optflags & FLAG_w) {
+		while (-1 == waitpid(pid, NULL, 0) && errno == EINTR)
+			;
+		if (toys.optflags & FLAG_s) {
+			ioctl(fd, VT_ACTIVATE, vstate.v_active);
+			ioctl(fd, VT_WAITACTIVE, vstate.v_active);
+			//check why deallocate isn't working here
+			xioctl(fd, VT_DISALLOCATE, (void *)(ptrdiff_t)TT.vt_num); 
+		}
+	}
+}