tests: remove ugly /bin/sh wrapper around each perl-based test script

* tests/check.mk (TESTS_ENVIRONMENT): Save and restore TMPDIR around
envvar-check, so that the few scripts that require $TMPDIR don't fail.
This is also good to let a user's default TMPDIR setting be used e.g.,
in the search for an 'other-partition'.
FIXME: this is pretty ugly.  maybe undo it and find a better way.
(TESTS_ENVIRONMENT): Invoke perl scripts with $(PERL), and use -T
if the script requires that.  Otherwise, use $(SHELL).

* tests/misc/md5sum-newline: Create a file whose name contains
a newline in Perl (resort to using "system", since open refuses).

Fix old brokenness exposed by this change:
* tests/du/files0-from: Correct test not to rely on stdin
being attached to a non-tty.
* tests/misc/sort (3g, 3h, 3i): Likewise: add explicit empty input file.
Avoid warnings about using qw()-around-commas.

* tests/rm/fail-eperm: Now that this test is run from a temporary
subdirectory, adjust the full name of the "rm" program we're going
to run.

Change #!/bin/sh to #!/usr/bin/perl, and factor out the few lines
of boilerplate code to invoke perl.  Do not "require 5.00x";
a configure-time Perl test handles that
* tests/dd/skip-seek:
* tests/misc/base64:
* tests/misc/basename:
* tests/misc/cut:
* tests/misc/date:
* tests/misc/dircolors:
* tests/misc/dirname:
* tests/misc/expand:
* tests/misc/expr:
* tests/misc/factor:
* tests/misc/fmt:
* tests/misc/fold:
* tests/misc/head:
* tests/misc/head-elide-tail:
* tests/misc/join:
* tests/misc/ls-misc:
* tests/misc/md5sum:
* tests/misc/md5sum-newline:
* tests/misc/mktemp:
* tests/misc/od:
* tests/misc/paste:
* tests/misc/pr:
* tests/misc/printf-cov:
* tests/misc/seq:
* tests/misc/sha1sum:
* tests/misc/sha1sum-vec:
* tests/misc/sha224sum:
* tests/misc/sha256sum:
* tests/misc/sha384sum:
* tests/misc/sha512sum:
* tests/misc/sort-merge:
* tests/misc/stat-printf:
* tests/misc/sum:
* tests/misc/tac:
* tests/misc/tail:
* tests/misc/test:
* tests/misc/test-diag:
* tests/misc/tr:
* tests/misc/tsort:
* tests/misc/tty-eof:
* tests/misc/unexpand:
* tests/misc/uniq:
* tests/misc/wc:
* tests/misc/wc-files0-from:
* tests/misc/xstrtol:
* tests/mv/i-1:
* tests/pr/pr-tests:
* tests/rm/empty-name:
* tests/rm/fail-eperm:
* tests/rm/unreadable:

1 files changed, 6 insertions, 22 deletions

diff --git a/tests/misc/md5sum-newline b/tests/misc/md5sum-newline
index ed6b85ceb..ef1bbcceb 100755
--- a/tests/misc/md5sum-newline
+++ b/tests/misc/md5sum-newline
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/usr/bin/perl
 # Newline tests for "md5sum".
 
 # Copyright (C) 1999, 2000, 2003, 2005, 2007-2008 Free Software Foundation, Inc.
@@ -16,26 +16,6 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-: ${srcdir=.}
-. $top_srcdir/tests/require-perl
-
-# See if we can create a filename that contains a newline.
-# Be careful to do it in a subshell so that we can redirect the
-# error output if it fails.
-(> 'a
-b') 2> /dev/null \
-  && filename_may_contain_newline=yes \
-  || filename_may_contain_newline=no
-rm -f 'a
-b'
-
-if test $filename_may_contain_newline = no; then
-  skip_test_ "failed to create newline-containing file name"
-fi
-
-me=`echo $0|sed 's,.*/,,'`
-exec $PERL -w -I$top_srcdir/tests -MCoreutils -M"CuTmpdir qw($me)" -- - <<\EOF
-require 5.003;
 use strict;
 
 (my $program_name = $0) =~ s|.*/||;
@@ -43,6 +23,11 @@ use strict;
 # Turn off localization of executable's output.
 @ENV{qw(LANGUAGE LANG LC_ALL)} = ('C') x 3;
 
+# See if we can create a file name that contains a newline.
+# Use system, since Perl doesn't let you do this with "open".
+system ('touch', "a\nb") == 0
+  or (warn "$0: failed to create newline-containing file name\n"), exit 77;
+
 my $degenerate = "d41d8cd98f00b204e9800998ecf8427e";
 my $t = '--text';
 
@@ -57,4 +42,3 @@ my $verbose = $ENV{VERBOSE};
 my $prog = 'md5sum';
 my $fail = run_tests ($program_name, $prog, \@Tests, $save_temps, $verbose);
 exit $fail;
-EOF