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Newsgroups:	comp.os.msdos.djgpp
Date:	Wed, 22 Jun 2016 20:47:16 -0700 (PDT)
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Subject:	"patch -d" hangs (even Ctrl-C fails to quit)
From:	"rugxulo AT gmail DOT com [via djgpp AT delorie DOT com]" <djgpp AT delorie DOT com>
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To:	djgpp AT delorie DOT com
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Reply-To:	djgpp AT delorie DOT com

Hi,

I think I found an obscure bug. "-d" is not something I've really used in
patch, but this is definitely some oddball behavior (arguably broken).
Yes, I can live without it, of course.   :-)

I don't know of a great way to reproduce this, so pardon any clumsy tests.

bug\nickname.old:

Nice to meet you today.
My online handle is Rugxulo.
Did you have a good breakfast?

bug\nickname.txt: (same as nickname.old, until patched)

bug\nickname.dif:

--- nickname.txt	2016-06-22 22:07:12 -0500
+++ nickname.new	2016-06-22 22:07:54 -0500
@@ -2 +2 @@
-My online handle is Rugxulo.
+My online handle is WhoCares.

run.bat (run from main dir, not within "bug\")

@echo off
if "%1"=="" goto end
if not exist %1.exe goto end
diff.exe -s bug\nickname.old bug\nickname.txt
%1.exe -d bug -i nickname.dif
echo ... not dead! ...
diff.exe -s bug\nickname.old bug\nickname.txt
copy bug\*.old bug\*.txt >NUL
:end

results.txt:

run pat254 -- okay
run pat259 -- okay
run pat261 -- fails to restore pwd, stays in "/bug"
run pat271 -- hangs the cpu, Ctrl-C fails, must reboot (Ctrl-Alt-Del)
run pat275 -- hangs the cpu, Ctrl-C fails, etc.

Since "current/v2gnu" only has PAT275B.ZIP, I figured it might be worth
mentioning this, even if "-d" is rarely used.

- Raw text -