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emacs diff-mode craziness

The current emacs21 and xemacs21 switches to diff-mode when we open *.patch files. But I fell into the trap hidden in the current diff-mode behavior over one hour.

When I opened the patch file (filename: debian/patches/linux-types-and-time.patch in linux-kernel-headers package), the file was as follows:

        --- include.orig/linux/time.h   2005-04-21 09:03:16.000000000 +0900
        +++ include/linux/time.h        2005-05-04 15:29:52.266871616 +0900
        @@ -1,6 +1,10 @@
         #ifndef _LINUX_TIME_H
	...
         #ifdef __KERNEL__
=>      @@ -177,5 +181,6 @@ struct      itimerval {
         #define TIMER_ABSTIME 0x01
	...
         #endif
        --- include.orig/linux/types.h  2005-04-21 09:03:16.000000000 +0900
        +++ include/linux/types.h       2005-05-04 15:30:14.515900970 +0900
        @@ -1,6 +1,16 @@
         #ifndef _LINUX_TYPES_H
	...
=>      @@ -169,4 +179,6 @@
                char                    f_fpack[6];
         };
Then, I just exchanged the order of two parts as follows:
        --- include.orig/linux/types.h  2005-04-21 09:03:16.000000000 +0900
        +++ include/linux/types.h       2005-05-04 15:30:14.515900970 +0900
        @@ -1,6 +1,16 @@
         #ifndef _LINUX_TYPES_H
	...
         #include 
=>      @@ -169,5 +179,7 @@                                                                                                 
                char                    f_fpack[6];
         };
        --- include.orig/linux/time.h   2005-04-21 09:03:16.000000000 +0900
        +++ include/linux/time.h        2005-05-04 15:29:52.266871616 +0900
        @@ -1,6 +1,10 @@
         #ifndef _LINUX_TIME_H
	...
        +
         #ifdef __KERNEL__
=>      @@ -177,6 +181,7 @@ struct      itimerval { 
         #define TIMER_ABSTIME 0x01
	...
@@ lines are suddenly modified without any editing for patch lines. This behavior is crazy. I submitted the bug report to Bug#201816 and Bug#307617. I think either this problem should be fixed or emacs should provide the variable to stop @@ line modification via "setq" and so on.




blosxom and debian glibc

I just installed blosxom for my blog. I usually use my diary at gotom diary, but I heard from someone that blosxom is more suitable for planet.debian.net articles compared with HNS.
I was requested to write this blog from my colleague, Guillaume Bisch - I guess he'll look at my blog in April after he returns to Switzerland. I usually wrote my diary in Japanese - but in this blog I'll write all articles in English.

Today, I worked for debian glibc 2.3.2.ds1-21 <=> 2.3.4-3 upgrade/downgrade path. It works nicely for me, but it needs more review. I shall write this interesting problem someday.