3 # Ensure that pwd works even when run from a very deep directory.
5 # Copyright (C) 2006-2010 Free Software Foundation, Inc.
7 # This program is free software: you can redistribute it and/or modify
8 # it under the terms of the GNU General Public License as published by
9 # the Free Software Foundation, either version 3 of the License, or
10 # (at your option) any later version.
12 # This program is distributed in the hope that it will be useful,
13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 # GNU General Public License for more details.
17 # You should have received a copy of the GNU General Public License
18 # along with this program. If not, see <http://www.gnu.org/licenses/>.
21 .
$srcdir/require-perl
24 test "$VERBOSE" = yes && env
-- pwd --version
26 require_readable_root_
31 # Don't use CuTmpdir here, since File::Temp's use of rmtree can't
32 # remove the deep tree we create.
35 # Show that pwd works even when the length of the resulting
36 # directory name is longer than PATH_MAX.
39 (my
$ME = $ENV{ARGV_0
}) =~ s|.
*/||
;
41 sub normalize_to_cwd_relative
($$$
)
43 my
($dir, $dev, $ino) = @_
;
48 $slash = index
$dir, '/', $slash + 1;
50 and die
"$ME: $dir does not contain old CWD\n";
51 my
$dir_prefix = $slash ? substr
($dir, 0, $slash) : '/';
52 my
($d, $i) = (stat
$dir_prefix)[0, 1];
53 $d eq
$dev && $i eq
$ino
54 and
return substr
$dir, $slash + 1;
58 # Set up a safe, well-known environment
59 delete @ENV
{qw
(BASH_ENV CDPATH ENV
)};
62 # Taint checking requires a sanitized $PATH. This script performs no $PATH
63 # search, so on most Unix-based systems, it is fine simply to clear $ENV{PATH}.
64 # However, on Cygwin, it's used to find cygwin1.dll, so set it.
65 $ENV{PATH
} = '/bin:/usr/bin';
67 # Save CWD's device and inode numbers.
68 my
($dev, $ino) = (stat
'.')[0, 1];
70 # Construct the expected "."-relative part of pwd's output.
73 my
$expected = "/$z" x
$n;
74 # Remove the leading "/".
75 substr
($expected, 0, 1) = '';
82 warn
"$ME: skipping this test; cannot create long directory name "
83 .
"at depth $i: $!\n";
90 my
$abs_top_builddir = $ENV{abs_top_builddir
};
92 or die
"$ME: envvar abs_top_builddir not defined\n";
93 my
$build_src_dir = "$abs_top_builddir/src";
94 if ($build_src_dir !~ m
!^
([-+.
:/\w
]+)$
!)
96 warn
"$ME: skipping this test; odd build source directory name:\n"
102 my
$pwd_binary = "$build_src_dir/pwd";
105 or die
"$ME: $pwd_binary is not an executable file\n";
106 chomp
(my
$actual = `$pwd_binary`);
108 # Convert the absolute name from pwd into a $CWD-relative name.
109 # This is necessary in order to avoid a spurious failure when run
110 # from a directory in a bind-mounted partition. What happens is
111 # pwd reads a ".." that contains two or more entries with identical
112 # dev,ino that match the ones we're looking for, and it chooses a
113 # name that does not correspond to the one already recorded in $CWD.
114 $actual = normalize_to_cwd_relative
$actual, $dev, $ino;
116 if ($expected ne
$actual)
118 my
$e_len = length
$expected;
119 my
$a_len = length
$actual;
120 warn
"expected len: $e_len\n";
121 warn
"actual len: $a_len\n";
122 warn
"expected: $expected\n";
123 warn
"actual: $actual\n";