Date: Sat, 24 Apr 2004 12:38:36 +1000 From: Stephen McKay <smckay@internode.on.net> To: freebsd-current@freebsd.org Cc: Stephen McKay <smckay@internode.on.net> Subject: what /boot/kernel/kernel output Message-ID: <200404240238.i3O2capL005181@dungeon.home>
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[This is a resend. My first attempt appears to have been eaten. Sorry
if this is the 2nd copy for you.]
For as long as I can remember, running the SCCS command "what" on the
kernel of the day produced useful output: a single line fairly similar
to "uname -v" but not quite so verbose. It works up until FreeBSD 5.2.1
(at least) but fails for current.
It fails because a hack in the constructed file "vers.c" no longer
works. Here is a fix to the hack:
--- newvers.sh.old Wed Apr 14 13:01:18 2004
+++ newvers.sh Fri Apr 23 22:55:04 2004
@@ -85,7 +85,7 @@
i=`make -V KERN_IDENT`
cat << EOF > vers.c
$COPYRIGHT
-char sccspad[32 - 4 /* sizeof(sccs) */] = { '\\0' };
+char sccspad[32 - 4 /* sizeof(sccs) */] = { '\\1' };
char sccs[4] = { '@', '(', '#', ')' };
char version[] = "${VERSION} #${v}: ${t}\\n ${u}@${h}:${d}\\n";
char ostype[] = "${TYPE}";
Without this, sccspad is put in the BSS. I note that NetBSD solved
this by duplicating the version string, one copy with @(#) and one
without. Perhaps this is better than second guessing the whims of
the compiler.
Secondly, the output of "what" now has extraneous lines:
$RCSfile: if_em_hw.h,v $$Revision: 1.37 $$Date: 2003/12/20 00:14:51 $
which is printed twice.
To solve this, we could #define NO_VERSION_CONTROL or simply delete
the @(#) characters in line 45 in dev/em/if_em_hw.h.
So, is this one tradition that still exists, or does this go in my
growing collection of personal hacks? Should I patch either or both
of these? The quick hack or the NetBSD way?
Stephen.
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