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Date: Wed, 28 Oct 2015 14:55:29 -0400
From: "Alex" <by7eth29fh AT snkmail DOT com>
To: cygwin AT cygwin DOT com
Message-ID: <3807-1446058529-722065@sneakemail.com>
Subject: Unison 2.43.3 fails to synchronize execute permission bit
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When synchronizing two directories on the same NTFS-formatted drive, unison (with -perms 0o1777) fails to set execute permissions on new files.  (It also fails to detect changes in execute permissions and to set them on existing files.)

I am running Cygwin 64-bit from setup version 2.873.  Below is a script to test this phenomenon for new files.  It creates and later destroys a sandbox directory under /tmp/.

Thank you all for your time and efforts on the Cygwin project.  I have been a happy user for over 10 years.

Alex Hankins


----------
#!/usr/bin/bash

# File:  test-whether-unison-preserves-execute-permissions.bash

# Test whether unison (and the filesystem housing /tmp)
# synchronizes execute-bits on new, local files.

# Comment out to turn off script debugging:
#set -x

# We need to clean up after the test is done, so we use this flag to
# determine the exit status later.
#
success="false"

umask 700

# Try to create a temporary directory to store all test files.
#
tmpDir="/tmp/unison.$$"
if ! mkdir "${tmpDir}"; then
  echo >&2 "${0}": cannot make temporary directory.
  exit 1
fi

export UNISON="${tmpDir}/.unison"  # Keep ~/.unison clean.
mkdir "${UNISON}"

mkdir "${tmpDir}/a" "${tmpDir}/b"
touch "${tmpDir}/a/foo"
chmod u+rwx,go= "${tmpDir}/a/foo"

echo "----- Before synchronization:"
ls -lRa "${tmpDir}"
echo

echo "----- Running unison."
unison -batch -debug all -log=false -perms 0o1777 "${tmpDir}/a" "${tmpDir}/b"
echo

echo "----- After synchronization:"
ls -lRa "${tmpDir}"
echo

if [ -x "${tmpDir}/b/foo" ]; then
  success="true"
else
  echo >&2 "${0}: test failed (for filesystem housing /tmp): execute bit not preserved"
  success="false"
fi

# Clean up the temporary directory we made.
rm -r "${tmpDir}"

if [ "${success}" = "false" ]; then
  exit 1
fi


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