1#!./perl -w
2
3BEGIN {
4    # We really want to know if chdir is working, as the build process will
5    # all go wrong if it is not.  So avoid clearing @INC under miniperl.
6    @INC = () if defined &DynaLoader::boot_DynaLoader;
7
8    # We're not going to chdir() into 't' because we don't know if
9    # chdir() works!  Instead, we'll hedge our bets and put both
10    # possibilities into @INC.
11    require "./test.pl";
12    set_up_inc(qw(t . lib ../lib));
13}
14
15plan(tests => 44);
16
17use Config;
18use Errno qw(ENOENT EBADF EINVAL);
19
20my $IsVMS   = $^O eq 'VMS';
21
22# For an op regression test, I don't want to rely on "use constant" working.
23my $has_fchdir = ($Config{d_fchdir} || "") eq "define";
24
25# Might be a little early in the testing process to start using these,
26# but I can't think of a way to write this test without them.
27use File::Spec::Functions qw(:DEFAULT splitdir rel2abs splitpath);
28
29# Can't use Cwd::abs_path() because it has different ideas about
30# path separators than File::Spec.
31sub abs_path {
32    my $d = rel2abs(curdir);
33    $d = lc($d) if $^O =~ /^uwin/;
34    $d;
35}
36
37my $Cwd = abs_path;
38
39# Let's get to a known position
40SKIP: {
41    my ($vol,$dir) = splitpath(abs_path,1);
42    my $test_dir = 't';
43    my $compare_dir = (splitdir($dir))[-1];
44
45    # VMS is case insensitive but will preserve case in EFS mode.
46    # So we must normalize the case for the compare.
47
48    $compare_dir = lc($compare_dir) if $IsVMS;
49    skip("Already in t/", 2) if $compare_dir eq $test_dir;
50
51    ok( chdir($test_dir),     'chdir($test_dir)');
52    is( abs_path, catdir($Cwd, $test_dir),    '  abs_path() agrees' );
53}
54
55$Cwd = abs_path;
56
57SKIP: {
58    skip("no fchdir", 19) unless $has_fchdir;
59    my $has_dirfd = ($Config{d_dirfd} || $Config{d_dir_dd_fd} || "") eq "define";
60    ok(opendir(my $dh, "."), "opendir .");
61    ok(open(my $fh, "<", "op"), "open op");
62    ok(chdir($fh), "fchdir op");
63    ok(-f "chdir.t", "verify that we are in op");
64    if ($has_dirfd) {
65       ok(chdir($dh), "fchdir back");
66    }
67    else {
68       eval { chdir($dh); };
69       like($@, qr/^The dirfd function is unimplemented at/, "dirfd is unimplemented");
70       chdir ".." or die $!;
71    }
72
73    # same with bareword file handles
74    no warnings 'once';
75    *DH = $dh;
76    *FH = $fh;
77    ok(chdir FH, "fchdir op bareword");
78    ok(-f "chdir.t", "verify that we are in op");
79    if ($has_dirfd) {
80       ok(chdir DH, "fchdir back bareword");
81    }
82    else {
83       eval { chdir(DH); };
84       like($@, qr/^The dirfd function is unimplemented at/, "dirfd is unimplemented");
85       chdir ".." or die $!;
86    }
87    ok(-d "op", "verify that we are back");
88
89    ok(open(H, "<", "base"), "open base") or diag $!;
90    ok(chdir(H), "fchdir to base");
91    ok(-f "cond.t", "verify that we are in 'base'");
92    ok(close(H), "close");
93    $! = 0;
94    {
95        my $warn;
96        local $SIG{__WARN__} = sub { $warn = shift };
97        ok(!chdir(H), "check we can't chdir to closed handle");
98        is(0+$!, EBADF, 'check $! set appropriately');
99        like($warn, qr/on closed filehandle H/, 'like closed');
100        $! = 0;
101    }
102    {
103        my $warn;
104        local $SIG{__WARN__} = sub { $warn = shift };
105        ok(!chdir(NEVEROPENED), "check we can't chdir to never opened handle");
106        is(0+$!, EBADF, 'check $! set appropriately');
107        like($warn, qr/on unopened filehandle NEVEROPENED/, 'like never opened');
108        chdir ".." or die $!;
109    }
110}
111
112SKIP: {
113    skip("has fchdir", 1) if $has_fchdir;
114    opendir(my $dh, "op");
115    eval { chdir($dh); };
116    like($@, qr/^The fchdir function is unimplemented at/, "fchdir is unimplemented");
117}
118
119# The environment variables chdir() pays attention to.
120my @magic_envs = qw(HOME LOGDIR SYS$LOGIN);
121
122sub check_env {
123    my($key) = @_;
124
125    # Make sure $ENV{'SYS$LOGIN'} is only honored on VMS.
126    if( $key eq 'SYS$LOGIN' && !$IsVMS ) {
127        ok( !chdir(),         "chdir() on $^O ignores only \$ENV{$key} set" );
128        is( abs_path, $Cwd,   '  abs_path() did not change' );
129        pass( "  no need to test SYS\$LOGIN on $^O" ) for 1..4;
130    }
131    else {
132        ok( chdir(),              "chdir() w/ only \$ENV{$key} set" );
133        is( abs_path, $ENV{$key}, '  abs_path() agrees' );
134        chdir($Cwd);
135        is( abs_path, $Cwd,       '  and back again' );
136
137        my $warning = '';
138        local $SIG{__WARN__} = sub { $warning .= join '', @_ };
139        $! = 0;
140        ok(!chdir(''), "chdir('') no longer implied chdir()");
141        is($!+0, ENOENT, 'check $! set appropriately');
142        is($warning, '', 'should no longer warn about deprecation');
143    }
144}
145
146fresh_perl_is(<<'EOP', '', { stderr => 1 }, "check stack handling");
147for $x (map $_+1, 1 .. 100) {
148  map chdir, 1 .. $x;
149}
150EOP
151
152my %Saved_Env = ();
153sub clean_env {
154    foreach my $env (@magic_envs) {
155        $Saved_Env{$env} = $ENV{$env};
156
157        # Can't actually delete SYS$ stuff on VMS.
158        next if $IsVMS && $env eq 'SYS$LOGIN';
159
160	# On VMS, %ENV is many layered.
161	delete $ENV{$env} while exists $ENV{$env};
162    }
163
164    # The following means we won't really be testing for non-existence,
165    # but in Perl we can only delete from the process table, not the job
166    # table.
167    $ENV{'SYS$LOGIN'} = '' if $IsVMS;
168}
169
170END {
171    no warnings 'uninitialized';
172
173    # Restore the environment for VMS (and doesn't hurt for anyone else)
174    @ENV{@magic_envs} = @Saved_Env{@magic_envs};
175
176    # On VMS this must be deleted or process table is wrong on exit
177    # when this script is run interactively.
178    delete $ENV{'SYS$LOGIN'} if $IsVMS;
179}
180
181
182foreach my $key (@magic_envs) {
183    # We're going to be using undefs a lot here.
184    no warnings 'uninitialized';
185
186    clean_env;
187    $ENV{$key} = catdir $Cwd, 'op';
188
189    check_env($key);
190}
191
192{
193    clean_env;
194  SKIP:
195    {
196        $IsVMS
197          and skip "Can't delete SYS\$LOGIN, so chdir() test meaningless", 2;
198        $! = 0;
199        ok( !chdir(),                   'chdir() w/o any ENV set' );
200        is( $!+0, EINVAL,               'check $! set to EINVAL');
201    }
202    is( abs_path, $Cwd,             '  abs_path() agrees' );
203}
204