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1 | #!./perl -w |
2 | |
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3 | my $child; |
4 | |
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5 | BEGIN { |
6 | chdir 't' if -d 't'; |
7 | @INC = '../lib'; |
8 | require Config; import Config; |
9 | if ($Config{'extensions'} !~ /\bSocket\b/ && |
10 | !(($^O eq 'VMS') && $Config{d_socket})) { |
11 | print "1..0\n"; |
12 | exit 0; |
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13 | } |
14 | |
15 | # Too many things in this test will hang forever if something is wrong, |
16 | # so we need a self destruct timer. And IO can hang despite an alarm. |
17 | |
18 | # This is convoluted, but we must fork before Test::More, else child's |
19 | # Test::More thinks that it ran no tests, and prints a message to that |
20 | # effect |
21 | if( $Config{d_fork} ) { |
22 | my $parent = $$; |
23 | $child = fork; |
24 | die "Fork failed" unless defined $child; |
25 | if (!$child) { |
26 | $SIG{INT} = sub {exit 0}; # You have 60 seconds. Your time starts now. |
27 | my $must_finish_by = time + 60; |
28 | my $remaining; |
29 | while ($remaining = time - $must_finish_by) { |
30 | sleep $remaining; |
31 | } |
32 | warn "Something unexpectedly hung during testing"; |
33 | kill "INT", $parent or die "Kill failed: $!"; |
34 | exit 1; |
35 | } |
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36 | } |
37 | } |
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38 | |
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39 | use Socket; |
40 | use Test::More; |
41 | use strict; |
42 | use warnings; |
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43 | use Errno; |
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44 | |
45 | my $skip_reason; |
46 | |
47 | if( !$Config{d_alarm} ) { |
48 | plan skip_all => "alarm() not implemented on this platform"; |
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49 | } elsif( !$Config{d_fork} ) { |
50 | plan skip_all => "fork() not implemented on this platform"; |
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51 | } else { |
52 | # This should fail but not die if there is real socketpair |
53 | eval {socketpair LEFT, RIGHT, -1, -1, -1}; |
54 | if ($@ =~ /^Unsupported socket function "socketpair" called/) { |
55 | plan skip_all => 'No socketpair (real or emulated)'; |
56 | } else { |
57 | eval {AF_UNIX}; |
58 | if ($@ =~ /^Your vendor has not defined Socket macro AF_UNIX/) { |
59 | plan skip_all => 'No AF_UNIX'; |
60 | } else { |
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61 | plan tests => 45; |
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62 | } |
63 | } |
64 | } |
65 | |
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66 | # But we'll install an alarm handler in case any of the races below fail. |
67 | $SIG{ALRM} = sub {die "Unexpected alarm during testing"}; |
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68 | |
69 | ok (socketpair (LEFT, RIGHT, AF_UNIX, SOCK_STREAM, PF_UNSPEC), |
70 | "socketpair (LEFT, RIGHT, AF_UNIX, SOCK_STREAM, PF_UNSPEC)") |
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71 | or print "# \$\! = $!\n"; |
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72 | |
73 | my @left = ("hello ", "world\n"); |
74 | my @right = ("perl ", "rules!"); # Not like I'm trying to bias any survey here. |
75 | |
76 | foreach (@left) { |
77 | # is (syswrite (LEFT, $_), length $_, "write " . _qq ($_) . " to left"); |
78 | is (syswrite (LEFT, $_), length $_, "syswrite to left"); |
79 | } |
80 | foreach (@right) { |
81 | # is (syswrite (RIGHT, $_), length $_, "write " . _qq ($_) . " to right"); |
82 | is (syswrite (RIGHT, $_), length $_, "syswrite to right"); |
83 | } |
84 | |
85 | # stream socket, so our writes will become joined: |
86 | my ($buffer, $expect); |
87 | $expect = join '', @right; |
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88 | undef $buffer; |
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89 | is (read (LEFT, $buffer, length $expect), length $expect, "read on left"); |
90 | is ($buffer, $expect, "content what we expected?"); |
91 | $expect = join '', @left; |
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92 | undef $buffer; |
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93 | is (read (RIGHT, $buffer, length $expect), length $expect, "read on right"); |
94 | is ($buffer, $expect, "content what we expected?"); |
95 | |
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96 | ok (shutdown(LEFT, SHUT_WR), "shutdown left for writing"); |
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97 | # This will hang forever if eof is buggy, and alarm doesn't interrupt system |
98 | # Calls. Hence the child process minder. |
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99 | { |
100 | local $SIG{ALRM} = sub { warn "EOF on right took over 3 seconds" }; |
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101 | local $TODO = "Known problems with unix sockets on $^O" if $^O eq 'hpux'; |
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102 | alarm 3; |
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103 | $! = 0; |
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104 | ok (eof RIGHT, "right is at EOF"); |
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105 | is ($!, '', 'and $! should report no error'); |
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106 | alarm 60; |
107 | } |
108 | |
109 | $SIG{PIPE} = 'IGNORE'; |
110 | { |
111 | local $SIG{ALRM} |
112 | = sub { warn "syswrite to left didn't fail within 3 seconds" }; |
113 | alarm 3; |
114 | is (syswrite (LEFT, "void"), undef, "syswrite to shutdown left should fail"); |
115 | alarm 60; |
116 | } |
117 | SKIP: { |
118 | # This may need skipping on some OSes |
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119 | ok (($!{EPIPE} or $!{ESHUTDOWN}), '$! should be EPIPE or ESHUTDOWN') |
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120 | or printf "\$\!=%d(%s)\n", $!, $!; |
121 | } |
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122 | |
123 | my @gripping = (chr 255, chr 127); |
124 | foreach (@gripping) { |
125 | is (syswrite (RIGHT, $_), length $_, "syswrite to right"); |
126 | } |
127 | |
128 | ok (!eof LEFT, "left is not at EOF"); |
129 | |
130 | $expect = join '', @gripping; |
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131 | undef $buffer; |
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132 | is (read (LEFT, $buffer, length $expect), length $expect, "read on left"); |
133 | is ($buffer, $expect, "content what we expected?"); |
134 | |
135 | ok (close LEFT, "close left"); |
136 | ok (close RIGHT, "close right"); |
137 | |
138 | # And now datagrams |
139 | # I suspect we also need a self destruct time-bomb for these, as I don't see any |
140 | # guarantee that the stack won't drop a UDP packet, even if it is for localhost. |
141 | |
142 | ok (socketpair (LEFT, RIGHT, AF_UNIX, SOCK_DGRAM, PF_UNSPEC), |
143 | "socketpair (LEFT, RIGHT, AF_UNIX, SOCK_DGRAM, PF_UNSPEC)") |
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144 | or print "# \$\! = $!\n"; |
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145 | |
146 | foreach (@left) { |
147 | # is (syswrite (LEFT, $_), length $_, "write " . _qq ($_) . " to left"); |
148 | is (syswrite (LEFT, $_), length $_, "syswrite to left"); |
149 | } |
150 | foreach (@right) { |
151 | # is (syswrite (RIGHT, $_), length $_, "write " . _qq ($_) . " to right"); |
152 | is (syswrite (RIGHT, $_), length $_, "syswrite to right"); |
153 | } |
154 | |
155 | # stream socket, so our writes will become joined: |
156 | my ($total); |
157 | $total = join '', @right; |
158 | foreach $expect (@right) { |
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159 | undef $buffer; |
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160 | is (sysread (LEFT, $buffer, length $total), length $expect, "read on left"); |
161 | is ($buffer, $expect, "content what we expected?"); |
162 | } |
163 | $total = join '', @left; |
164 | foreach $expect (@left) { |
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165 | undef $buffer; |
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166 | is (sysread (RIGHT, $buffer, length $total), length $expect, "read on right"); |
167 | is ($buffer, $expect, "content what we expected?"); |
168 | } |
169 | |
170 | ok (shutdown(LEFT, 1), "shutdown left for writing"); |
171 | # eof uses buffering. eof is indicated by a sysread of zero. |
172 | # but for a datagram socket there's no way it can know nothing will ever be |
173 | # sent |
174 | { |
175 | my $alarmed = 0; |
176 | local $SIG{ALRM} = sub { $alarmed = 1; }; |
177 | print "# Approximate forever as 3 seconds. Wait 'forever'...\n"; |
178 | alarm 3; |
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179 | undef $buffer; |
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180 | is (sysread (RIGHT, $buffer, 1), undef, |
181 | "read on right should be interrupted"); |
182 | is ($alarmed, 1, "alarm should have fired"); |
183 | } |
184 | alarm 30; |
185 | |
186 | #ok (eof RIGHT, "right is at EOF"); |
187 | |
188 | foreach (@gripping) { |
189 | is (syswrite (RIGHT, $_), length $_, "syswrite to right"); |
190 | } |
191 | |
192 | $total = join '', @gripping; |
193 | foreach $expect (@gripping) { |
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194 | undef $buffer; |
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195 | is (sysread (LEFT, $buffer, length $total), length $expect, "read on left"); |
196 | is ($buffer, $expect, "content what we expected?"); |
197 | } |
198 | |
199 | ok (close LEFT, "close left"); |
200 | ok (close RIGHT, "close right"); |
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201 | |
202 | kill "INT", $child or warn "Failed to kill child process $child: $!"; |
203 | exit 0; |