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818dbee8dc
* tests/misc/pwd-long: Add canonical '(exit $fail); exit $fail'. Signed-off-by: Jim Meyering <meyering@redhat.com>
120 lines
3.2 KiB
Perl
Executable File
120 lines
3.2 KiB
Perl
Executable File
#!/bin/sh
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# -*- perl -*-
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# Ensure that pwd works even when run from a very deep directory.
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# Copyright (C) 2006-2008 Free Software Foundation, Inc.
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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: ${srcdir=.}
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. $srcdir/../require-perl
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. $srcdir/../test-lib.sh
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require_readable_root_
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ARGV_0=$0
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export ARGV_0
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# Don't use CuTmpdir here, since File::Temp's use of rmtree can't
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# remove the deep tree we create.
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$PERL -Tw -- - <<\EOF
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# Show that pwd works even when the length of the resulting
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# directory name is longer than PATH_MAX.
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use strict;
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(my $ME = $ENV{ARGV_0}) =~ s|.*/||;
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sub normalize_to_cwd_relative ($$$)
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{
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my ($dir, $dev, $ino) = @_;
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my $slash = -1;
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my $next_slash;
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while (1)
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{
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$slash = index $dir, '/', $slash + 1;
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$slash <= -1
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and die "$ME: $dir does not contain old CWD\n";
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my $dir_prefix = $slash ? substr ($dir, 0, $slash) : '/';
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my ($d, $i) = (stat $dir_prefix)[0, 1];
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$d == $dev && $i == $ino
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and return substr $dir, $slash + 1;
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}
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}
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# Set up a safe, well-known environment
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delete @ENV{qw(BASH_ENV CDPATH ENV PATH)};
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$ENV{IFS} = '';
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# Save CWD's device and inode numbers.
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my ($dev, $ino) = (stat '.')[0, 1];
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# Construct the expected "."-relative part of pwd's output.
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my $z = 'z' x 31;
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my $n = 256;
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my $expected = "/$z" x $n;
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# Remove the leading "/".
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substr ($expected, 0, 1) = '';
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my $i = 0;
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do
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{
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mkdir $z, 0700
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or die "$ME: at depth $i: $!\n";
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chdir $z;
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}
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until (++$i == $n);
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my $abs_top_builddir = $ENV{abs_top_builddir};
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$abs_top_builddir
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or die "$ME: envvar abs_top_builddir not defined\n";
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my $build_src_dir = "$abs_top_builddir/src";
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if ($build_src_dir !~ m!^([-+.:/\w]+)$!)
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{
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warn "$0: skipping this test; odd build source directory name:\n"
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. "$build_src_dir\n";
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exit 77;
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}
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$build_src_dir = $1;
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my $pwd_binary = "$build_src_dir/pwd";
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-x $pwd_binary
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or die "$ME: $pwd_binary is not an executable file\n";
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chomp (my $actual = `$pwd_binary`);
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# Convert the absolute name from pwd into a $CWD-relative name.
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# This is necessary in order to avoid a spurious failure when run
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# from a directory in a bind-mounted partition. What happens is
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# pwd reads a ".." that contains two or more entries with identical
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# dev,ino that match the ones we're looking for, and it chooses a
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# name that does not correspond to the one already recorded in $CWD.
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$actual = normalize_to_cwd_relative $actual, $dev, $ino;
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if ($expected ne $actual)
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{
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my $e_len = length $expected;
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my $a_len = length $actual;
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warn "expected len: $e_len\n";
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warn "actual len: $a_len\n";
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warn "expected: $expected\n";
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warn "actual: $actual\n";
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exit 1;
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}
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EOF
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fail=$?
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(exit $fail); exit $fail
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