[tor-bugs] #14478 [Tor]: Zero length keys test improvements

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#14478: Zero length keys test improvements
-------------------------+----------------------------------
 Reporter:  cypherpunks  |          Owner:
     Type:  enhancement  |         Status:  new
 Priority:  normal       |      Milestone:  Tor: unspecified
Component:  Tor          |        Version:  Tor: unspecified
 Keywords:               |  Actual Points:
Parent ID:               |         Points:
-------------------------+----------------------------------
 The zero length keys could use some small improvements, such as;
 1. Remove the temporary directories that are generated. It prevents the
 main temporary directory from growing over time after each script
 execution. The solution would be a trap that removes them when the script
 exits.
 {{{
 diff --git a/src/test/zero_length_keys.sh b/src/test/zero_length_keys.sh
 index 3a99ca1..2545734 100755
 --- a/src/test/zero_length_keys.sh
 +++ b/src/test/zero_length_keys.sh
 @@ -26,6 +26,8 @@ if [ $# -lt 1 ]; then
  fi

  export DATA_DIR=`mktemp -d -t tor_zero_length_keys.XXXXXX`
 +trap "rm -rf "$DATA_DIR"" 0
 +
  # DisableNetwork means that the ORPort won't actually be opened.
  # 'ExitRelay 0' suppresses a warning.
  TOR="./src/or/tor --hush --DisableNetwork 1 --ShutdownWaitLength 0
 --ORPort 12345 --ExitRelay 0"
 }}}
 2. Do not export the variable `DATA_DIR` because it is useless and stop
 using the old style command substitution because it has cases of undefined
 results [0]. Also Bash mentions a preference towards the newer `$()` style
 [1].
 {{{
 diff --git a/src/test/zero_length_keys.sh b/src/test/zero_length_keys.sh
 index 3a99ca1..ede7df5 100755
 --- a/src/test/zero_length_keys.sh
 +++ b/src/test/zero_length_keys.sh
 @@ -25,7 +25,8 @@ if [ $# -lt 1 ]; then
    exit $?
  fi

 -export DATA_DIR=`mktemp -d -t tor_zero_length_keys.XXXXXX`
 +DATA_DIR="$(mktemp -d -t tor_zero_length_keys.XXXXXX)"
 +
  # DisableNetwork means that the ORPort won't actually be opened.
  # 'ExitRelay 0' suppresses a warning.
  TOR="./src/or/tor --hush --DisableNetwork 1 --ShutdownWaitLength 0
 --ORPort 12345 --ExitRelay 0"
 }}}
 3. Because i am unsure which platforms/shells need to be supported, this
 improvement may be more work than the satisfaction of correctness it
 gives. In GNU Coreutils the `mktemp` program marks the `-t` option as
 deprecated [2]. On other platforms the option is not deprecated. A list of
 options of the several `mktemp` implementations is available on
 [https://stackoverflow.com/a/2792789 StackOverflow]. The question is
 whether the script needs to be platform-aware so it can avoid deprecated
 options or not.

 [0]
 http://pubs.opengroup.org/onlinepubs/009695399/utilities/xcu_chap02.html#tag_02_06_03
 [1] https://www.gnu.org/software/bash/manual/bashref.html#Major-
 Differences-From-The-Bourne-Shell (search for `$()`)
 [2] https://www.gnu.org/software/coreutils/manual/html_node/mktemp-
 invocation.html#mktemp-invocation

 ''PS: The patches are just suggestions, if others agree i can merge them
 together into one patch and upload a patch file for easier merging.''

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/14478>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online
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