Attachment 24211 Details for Bug 17720 – Kernel patch adds a VT_WAITSWITCH ioctl command

[patch] Kernel patch adds a VT_WAITSWITCH ioctl command

kernel.patch (text/plain), 2.01 KB, created by Jason Hegler on 2009-03-24 13:53:40 UTC

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Creator: Jason Hegler

Created: 2009-03-24 13:53:40 UTC

Size: 2.01 KB

patch

obsolete

>diff -u -r linux-2.6.29-rc8/drivers/char/vt_ioctl.c patched-linux-2.6.29-rc8/drivers/char/vt_ioctl.c
>--- linux-2.6.29-rc8/drivers/char/vt_ioctl.c	2009-03-12 22:39:28.000000000 -0400
>+++ patched-linux-2.6.29-rc8/drivers/char/vt_ioctl.c	2009-03-24 15:50:33.000000000 -0400
>@@ -846,6 +846,13 @@
> 			ret = vt_waitactive(arg - 1);
> 		break;
> 
>+
>+	case VT_WAITSWITCH:
>+		if (!perm)
>+			goto eperm;
>+      ret = vt_waitactive(-1234);
>+		break;
>+      
> 	/*
> 	 * If a vt is under process control, the kernel will not switch to it
> 	 * immediately, but postpone the operation until the process calls this
>@@ -1202,6 +1209,11 @@
> 		if (signal_pending(current))
> 			break;
> 		schedule();
>+
>+      if (vt == -1234) {
>+         retval = 0;
>+         break;
>+      }
> 	}
> 	remove_wait_queue(&vt_activate_queue, &wait);
> 	__set_current_state(TASK_RUNNING);
>diff -u -r linux-2.6.29-rc8/include/linux/time.h patched-linux-2.6.29-rc8/include/linux/time.h
>--- linux-2.6.29-rc8/include/linux/time.h	2009-03-12 22:39:28.000000000 -0400
>+++ patched-linux-2.6.29-rc8/include/linux/time.h	2009-03-23 16:57:37.000000000 -0400
>@@ -115,6 +115,9 @@
> 
> extern void do_gettimeofday(struct timeval *tv);
> extern int do_settimeofday(struct timespec *tv);
>+extern unsigned long do_callfunc_gettimeoffset(void);
>+
>+
> extern int do_sys_settimeofday(struct timespec *tv, struct timezone *tz);
> #define do_posix_clock_monotonic_gettime(ts) ktime_get_ts(ts)
> extern long do_utimes(int dfd, char __user *filename, struct timespec *times, int flags);
>diff -u -r linux-2.6.29-rc8/include/linux/vt.h patched-linux-2.6.29-rc8/include/linux/vt.h
>--- linux-2.6.29-rc8/include/linux/vt.h	2009-03-12 22:39:28.000000000 -0400
>+++ patched-linux-2.6.29-rc8/include/linux/vt.h	2009-03-24 11:16:31.000000000 -0400
>@@ -73,5 +73,6 @@
> #define VT_LOCKSWITCH   0x560B  /* disallow vt switching */
> #define VT_UNLOCKSWITCH 0x560C  /* allow vt switching */
> #define VT_GETHIFONTMASK 0x560D  /* return hi font mask */
>+#define VT_WAITSWITCH    0x560E	/* wait for change in active vt */
> 
> #endif /* _LINUX_VT_H */

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