Hi, This patch will lock the VT that is active just after splash is initialized and release it just before the splash system is stopped.
I haven't tested it extensively with bootsplash.org, but it seems to
work with that (in vmware) too.
Comments?
Index: suspend.c
===================================================================
RCS file: /cvsroot/suspend/suspend/suspend.c,v
retrieving revision 1.52
diff -u -r1.52 suspend.c
--- suspend.c 14 Sep 2006 14:18:58 -0000 1.52
+++ suspend.c 14 Sep 2006 20:48:53 -0000
@@ -25,6 +25,7 @@
#include <stdlib.h>
#include <string.h>
#include <errno.h>
+#include <signal.h>
#ifdef CONFIG_COMPRESS
#include <lzf.h>
#else
@@ -66,6 +67,8 @@
static int suspend_swappiness = SUSPEND_SWAPPINESS;
static struct splash splash;
+static struct vt_mode orig_vtm;
+static int vfd;
static struct config_par parameters[PARAM_NO] = {
{
@@ -487,7 +490,7 @@
* write_image - Write entire image and metadata.
*/
-int write_image(int snapshot_fd, int resume_fd, int vt_no)
+int write_image(int snapshot_fd, int resume_fd)
{
static struct swap_map_handle handle;
struct swsusp_info *header = mem_pool;
@@ -644,7 +647,7 @@
while(1);
}
-int suspend_system(int snapshot_fd, int resume_fd, int vt_fd, int vt_no)
+int suspend_system(int snapshot_fd, int resume_fd)
{
loff_t avail_swap;
unsigned long image_size;
@@ -683,7 +686,7 @@
free_snapshot(snapshot_fd);
break;
}
- error = write_image(snapshot_fd, resume_fd, vt_no);
+ error = write_image(snapshot_fd, resume_fd);
if (!error) {
splash.progress(100);
#ifdef CONFIG_BOTH
@@ -1027,6 +1030,75 @@
}
#endif
+
+static void release_vt(int signo)
+{
+ printf("Ignoring request to release VT\n");
+ ioctl(vfd, VT_RELDISP, 0);
+}
+
+static void acquire_vt(int signo)
+{
+ printf("Ignoring request to acquire VT\n");
+ ioctl(vfd, VT_RELDISP, VT_ACKACQ);
+}
+
+static void unlock_vt(void)
+{
+ ioctl(vfd, VT_SETMODE, &orig_vtm);
+ close(vfd);
+}
+
+static int lock_vt()
+{
+ struct sigaction sa;
+ struct vt_mode vtm;
+ struct vt_stat vtstat;
+ char *vt_name = mem_pool;
+ int fd, error;
+
+ fd = console_fd("/dev/console");
+ if (fd < 0)
+ return fd;
+
+ error = ioctl(fd, VT_GETSTATE, &vtstat);
+ close(fd);
+
+ if ( error < 0 )
+ return -1;
+
+ sprintf(vt_name, "/dev/tty%d", vtstat.v_active);
+ vfd = open(vt_name, O_RDWR);
+ if (vfd < 0)
+ return vfd;
+
+ if (ioctl(vfd, VT_GETMODE, &vtm) < 0)
+ return -1;
+
+ /* Setting vt mode to VT_PROCESS means this process
+ * will handle vt switching requests.
+ * We installed handlers for release and acquire requests.
+ */
+ sigemptyset(&(sa.sa_mask));
+ sa.sa_flags = SA_RESTART;
+ sa.sa_handler = release_vt;
+ sigaction(SIGUSR1, &sa, NULL);
+ sa.sa_handler = acquire_vt;
+ sigaction(SIGUSR2, &sa, NULL);
+
+ orig_vtm = vtm;
+ vtm.mode = VT_PROCESS;
+ vtm.relsig = SIGUSR1;
+ vtm.acqsig = SIGUSR2;
+ if (ioctl(vfd, VT_SETMODE, &vtm) < 0)
+ return -1;
+
+ printf("Locked against VT switching\n");
+ return 0;
+}
+
+
+
int main(int argc, char *argv[])
{
unsigned int mem_size;
@@ -1161,6 +1233,9 @@
splash_prepare(&splash, splash_param);
+ if (lock_vt() < 0)
+ goto Restore_console;
+
splash.progress(5);
#ifdef CONFIG_BOTH
@@ -1187,7 +1262,7 @@
if (!s2ram && chroot(chroot_path)) {
ret = errno;
fprintf(stderr, "suspend: Could not chroot to %s\n",
chroot_path);
- goto Restore_console;
+ goto Unlock_vt;
}
chdir("/");
@@ -1195,7 +1270,7 @@
splash.progress(10);
- ret = suspend_system(snapshot_fd, resume_fd, vt_fd, suspend_vc);
+ ret = suspend_system(snapshot_fd, resume_fd);
if (orig_loglevel >= 0)
set_kernel_console_loglevel(orig_loglevel);
@@ -1205,6 +1280,8 @@
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