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Subject:	RE: What kind of executable is zcat? Crashes from cmd.exe
Date:	Thu, 12 Feb 2004 12:22:59 -0800
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From:	"Bakken, Luke" <Luke DOT Bakken AT getronics DOT com>
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> Jamshid Afshar wrote:
> > I just installed Cygwin. What kind of executable is 
> zcat.exe? It doesn't
> > show up when I "dir c:\cygwin\bin\zc*" (only zcmp), but I 
> see it's 19
> > bytes in Explorer. It works fine within bash, but I want 
> UNIX utilities I
> > can use in the regular Windows Command Prompt.
> 
> $ ls -l zcat.exe
> lrwxrwxrwx    1 rcampbel Users          19 Jan  6 17:06 
> zcat.exe -> gzip.exe
> 
> As you can see from the ls output, it's a symbolic link 
> (doesn't work in 
> cmd).  You can still call gunzip -c (or whatever).

I had a similar problem when trying to use gunzip from a cmd prompt
outside of a cygwin shell - I was getting illegal ntvdm CPU errors. The
fix is to replace the softlink with a hard link:

$ cd /bin
/bin
$ ls -l zcat*
lrwxrwxrwx    1 lukeb    Users          19 Sep 21 16:29 zcat.exe ->
gzip.exe
/bin
$ rm zcat.exe 
/bin
$ ln gzip.exe zcat.exe
/bin
$ ls -li zcat* gzip* gunzip*
1125899906888251 -rwxr-xr-x+   3 lukeb    Users       62976 Jul 23  2003
gunzip.exe
1125899906888251 -rwxr-xr-x+   3 lukeb    Users       62976 Jul 23  2003
gzip.exe
1125899906888251 -rwxr-xr-x+   3 lukeb    Users       62976 Jul 23  2003
zcat.exe

I would suggest doing the same with any other cygwin executable that is
a symbolic link that you intend to use "outside" cygwin.

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