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From:	David DOT Smith AT syntegra DOT bt DOT co DOT uk
To:	cygwin AT sourceware DOT cygnus DOT com
Subject:	[Q:] Question About strip.exe?
Date:	Fri, 19 Feb 1999 15:24:09 -0000
X-Mailer:	Internet Mail Service (5.5.2232.9)

Hi,

This might be a silly question, but should strip work across symbolic links?
For example, I executed the following sequence of commands in bash (comments
added later) and found that the files striped via a symbolic link are
truncated and unexecutable.  Is this "normal" behaviour or a bug?


I am executing the following command and finding that my cygwin installation
is no longer usable afterwards.

bash-$ find /usr/local/cygwin-b20.1 \( -name "*.dll" -or -name "*.exe" \)
-print -exec strip --strip-all {} \;

Regards,
David

# Create 2 copies of strip.exe.

bash-$ cp strip.exe a1.exe
bash-$ cp strip.exe a2.exe

# Create 2 symbolic links to the 2 copies of strip.exe.

bash-$ ln -s ./a1.exe ./l1.exe
bash-$ ln -s ./a2.exe ./l2.exe

# Execute the files via the symbolic links to check they work.

bash-$ ./l1 --version
GNU strip 2.9.4
Copyright 1997, 1998 Free Software Foundation, Inc.
This program is free software; you may redistribute it under the terms of
the GNU General Public License.  This program has absolutely no warranty.
bash-$ ./l2 --version
GNU strip 2.9.4
Copyright 1997, 1998 Free Software Foundation, Inc.
This program is free software; you may redistribute it under the terms of
the GNU General Public License.  This program has absolutely no warranty.

# Now strip the first executable directly.

bash-$ ./strip --strip-all ./a1.exe

# Now strip the second executable via the symbolic link.

bash-$ ./strip --strip-all ./l2.exe

# Execute the files again via the symbolic links to check they work.

bash-$ ./l1 --version
GNU strip 2.9.4
Copyright 1997, 1998 Free Software Foundation, Inc.
This program is free software; you may redistribute it under the terms of
the GNU General Public License.  This program has absolutely no warranty.

# The one striped via the symbolic link fails.

bash-$ ./l2 --version
bash: ./l2: Permission denied
bash-$

# Have a quick look at the file sizes.

bash-$ ls -l
total 856
-rwxr-xr-x   1 544      None       312832 Feb 19 15:01 a1.exe
-rwxr-xr-x   1 544      None         4136 Feb 19 15:01 a2.exe
lrw-r--r--   1 544      None           19 Feb 19 15:01 l1.exe -> ./a1.exe
lrw-r--r--   1 544      None           19 Feb 19 15:01 l2.exe -> ./a2.exe
-rwxr-xr-x   1 544      None      1409057 Feb 19 14:35 strip.exe
bash-$

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