Tests not being run for some shells

[Peter O'Gorman]

Hi,

While trying to figure out why the zgrep-f test was passing on some
platforms and failing on others (when it looked like it should fail on
all but linux-like systems) we discovered that the tests were not
getting run.

On AIX, IRIX and Tru64 /bin/sh the:
trap remove_tmp_ 0
was being run when the setup_ shell function exits, rather than when
the script exits, since remove_tmp_ ends with exit $__st this makes
all the tests pass on those systems.

This patch causes the zgrep-f test to fail for us with gzip-1.4 on
solaris, HP-UX, AIX, Tru64 and IRIX (only passing on Linux systems),
which seems reasonable as zgrep -f - requires /proc/$$/fd/<num>,
/dev/fd/<num> and GNU grep. 

Peter

Index: tests/init.sh
===================================================================
--- tests/init.sh.orig  2010-01-08 18:12:20.000000000 +0000
+++ tests/init.sh       2010-07-29 19:59:10.569184683 +0000
@@ -125,9 +125,9 @@
     || fail_ "failed to create temporary directory in $initial_cwd_"
   cd "$test_dir_"
 
-  # This pair of trap statements ensures that the temporary directory,
-  # $test_dir_, is removed upon exit as well as upon catchable signal.
-  trap remove_tmp_ 0
+  # This trap statement with the later trap remove_tmp_ 0  ensures
+  # that the temporary directory, $test_dir_, is removed upon exit as
+  # well as upon catchable signal.
   trap 'Exit $?' 1 2 13 15
 }
 
@@ -253,3 +253,7 @@
   && . "$srcdir/init.cfg"
 
 setup_ "$@"
+# This trap is here, rather than in the setup_ function because some
+# shells run the trap at shell function exit, rather than at script
+# exit.
+trap remove_tmp_ 0