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1 | #!./perl -w |
2 | |
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3 | my $child; |
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4 | my $can_fork; |
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5 | |
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6 | BEGIN { |
7 | chdir 't' if -d 't'; |
8 | @INC = '../lib'; |
9 | require Config; import Config; |
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10 | $can_fork = $Config{d_fork} || ($^O eq 'MSWin32' && $Config{useithreads}); |
11 | |
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12 | if ($Config{'extensions'} !~ /\bSocket\b/ && |
13 | !(($^O eq 'VMS') && $Config{d_socket})) { |
14 | print "1..0\n"; |
15 | exit 0; |
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16 | } |
17 | |
18 | # Too many things in this test will hang forever if something is wrong, |
19 | # so we need a self destruct timer. And IO can hang despite an alarm. |
20 | |
21 | # This is convoluted, but we must fork before Test::More, else child's |
22 | # Test::More thinks that it ran no tests, and prints a message to that |
23 | # effect |
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24 | if( $can_fork) { |
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25 | my $parent = $$; |
26 | $child = fork; |
27 | die "Fork failed" unless defined $child; |
28 | if (!$child) { |
29 | $SIG{INT} = sub {exit 0}; # You have 60 seconds. Your time starts now. |
30 | my $must_finish_by = time + 60; |
31 | my $remaining; |
32 | while ($remaining = time - $must_finish_by) { |
33 | sleep $remaining; |
34 | } |
35 | warn "Something unexpectedly hung during testing"; |
36 | kill "INT", $parent or die "Kill failed: $!"; |
37 | exit 1; |
38 | } |
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39 | } |
40 | } |
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41 | |
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42 | use Socket; |
43 | use Test::More; |
44 | use strict; |
45 | use warnings; |
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46 | use Errno; |
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47 | |
48 | my $skip_reason; |
49 | |
50 | if( !$Config{d_alarm} ) { |
51 | plan skip_all => "alarm() not implemented on this platform"; |
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52 | } elsif( !$can_fork ) { |
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53 | plan skip_all => "fork() not implemented on this platform"; |
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54 | } else { |
55 | # This should fail but not die if there is real socketpair |
56 | eval {socketpair LEFT, RIGHT, -1, -1, -1}; |
57 | if ($@ =~ /^Unsupported socket function "socketpair" called/) { |
58 | plan skip_all => 'No socketpair (real or emulated)'; |
59 | } else { |
60 | eval {AF_UNIX}; |
61 | if ($@ =~ /^Your vendor has not defined Socket macro AF_UNIX/) { |
62 | plan skip_all => 'No AF_UNIX'; |
63 | } else { |
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64 | plan tests => 45; |
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65 | } |
66 | } |
67 | } |
68 | |
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69 | # But we'll install an alarm handler in case any of the races below fail. |
70 | $SIG{ALRM} = sub {die "Unexpected alarm during testing"}; |
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71 | |
72 | ok (socketpair (LEFT, RIGHT, AF_UNIX, SOCK_STREAM, PF_UNSPEC), |
73 | "socketpair (LEFT, RIGHT, AF_UNIX, SOCK_STREAM, PF_UNSPEC)") |
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74 | or print "# \$\! = $!\n"; |
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75 | |
76 | my @left = ("hello ", "world\n"); |
77 | my @right = ("perl ", "rules!"); # Not like I'm trying to bias any survey here. |
78 | |
79 | foreach (@left) { |
80 | # is (syswrite (LEFT, $_), length $_, "write " . _qq ($_) . " to left"); |
81 | is (syswrite (LEFT, $_), length $_, "syswrite to left"); |
82 | } |
83 | foreach (@right) { |
84 | # is (syswrite (RIGHT, $_), length $_, "write " . _qq ($_) . " to right"); |
85 | is (syswrite (RIGHT, $_), length $_, "syswrite to right"); |
86 | } |
87 | |
88 | # stream socket, so our writes will become joined: |
89 | my ($buffer, $expect); |
90 | $expect = join '', @right; |
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91 | undef $buffer; |
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92 | is (read (LEFT, $buffer, length $expect), length $expect, "read on left"); |
93 | is ($buffer, $expect, "content what we expected?"); |
94 | $expect = join '', @left; |
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95 | undef $buffer; |
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96 | is (read (RIGHT, $buffer, length $expect), length $expect, "read on right"); |
97 | is ($buffer, $expect, "content what we expected?"); |
98 | |
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99 | ok (shutdown(LEFT, SHUT_WR), "shutdown left for writing"); |
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100 | # This will hang forever if eof is buggy, and alarm doesn't interrupt system |
101 | # Calls. Hence the child process minder. |
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102 | { |
103 | local $SIG{ALRM} = sub { warn "EOF on right took over 3 seconds" }; |
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104 | local $TODO = "Known problems with unix sockets on $^O" |
105 | if $^O eq 'hpux' || $^O eq 'unicosmk'; |
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106 | alarm 3; |
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107 | $! = 0; |
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108 | ok (eof RIGHT, "right is at EOF"); |
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109 | is ($!, '', 'and $! should report no error'); |
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110 | alarm 60; |
111 | } |
112 | |
113 | $SIG{PIPE} = 'IGNORE'; |
114 | { |
115 | local $SIG{ALRM} |
116 | = sub { warn "syswrite to left didn't fail within 3 seconds" }; |
117 | alarm 3; |
118 | is (syswrite (LEFT, "void"), undef, "syswrite to shutdown left should fail"); |
119 | alarm 60; |
120 | } |
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121 | { |
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122 | # This may need skipping on some OSes |
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123 | ok (($!{EPIPE} or $!{ESHUTDOWN}), '$! should be EPIPE or ESHUTDOWN') |
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124 | or printf "\$\!=%d(%s)\n", $!, $!; |
125 | } |
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126 | |
127 | my @gripping = (chr 255, chr 127); |
128 | foreach (@gripping) { |
129 | is (syswrite (RIGHT, $_), length $_, "syswrite to right"); |
130 | } |
131 | |
132 | ok (!eof LEFT, "left is not at EOF"); |
133 | |
134 | $expect = join '', @gripping; |
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135 | undef $buffer; |
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136 | is (read (LEFT, $buffer, length $expect), length $expect, "read on left"); |
137 | is ($buffer, $expect, "content what we expected?"); |
138 | |
139 | ok (close LEFT, "close left"); |
140 | ok (close RIGHT, "close right"); |
141 | |
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142 | |
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143 | # And now datagrams |
144 | # I suspect we also need a self destruct time-bomb for these, as I don't see any |
145 | # guarantee that the stack won't drop a UDP packet, even if it is for localhost. |
146 | |
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147 | SKIP: { |
148 | skip "No usable SOCK_DGRAM", 24 if ($^O eq 'MSWin32'); |
149 | |
150 | |
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151 | ok (socketpair (LEFT, RIGHT, AF_UNIX, SOCK_DGRAM, PF_UNSPEC), |
152 | "socketpair (LEFT, RIGHT, AF_UNIX, SOCK_DGRAM, PF_UNSPEC)") |
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153 | or print "# \$\! = $!\n"; |
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154 | |
155 | foreach (@left) { |
156 | # is (syswrite (LEFT, $_), length $_, "write " . _qq ($_) . " to left"); |
157 | is (syswrite (LEFT, $_), length $_, "syswrite to left"); |
158 | } |
159 | foreach (@right) { |
160 | # is (syswrite (RIGHT, $_), length $_, "write " . _qq ($_) . " to right"); |
161 | is (syswrite (RIGHT, $_), length $_, "syswrite to right"); |
162 | } |
163 | |
164 | # stream socket, so our writes will become joined: |
165 | my ($total); |
166 | $total = join '', @right; |
167 | foreach $expect (@right) { |
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168 | undef $buffer; |
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169 | is (sysread (LEFT, $buffer, length $total), length $expect, "read on left"); |
170 | is ($buffer, $expect, "content what we expected?"); |
171 | } |
172 | $total = join '', @left; |
173 | foreach $expect (@left) { |
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174 | undef $buffer; |
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175 | is (sysread (RIGHT, $buffer, length $total), length $expect, "read on right"); |
176 | is ($buffer, $expect, "content what we expected?"); |
177 | } |
178 | |
179 | ok (shutdown(LEFT, 1), "shutdown left for writing"); |
180 | # eof uses buffering. eof is indicated by a sysread of zero. |
181 | # but for a datagram socket there's no way it can know nothing will ever be |
182 | # sent |
183 | { |
184 | my $alarmed = 0; |
185 | local $SIG{ALRM} = sub { $alarmed = 1; }; |
186 | print "# Approximate forever as 3 seconds. Wait 'forever'...\n"; |
187 | alarm 3; |
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188 | undef $buffer; |
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189 | is (sysread (RIGHT, $buffer, 1), undef, |
190 | "read on right should be interrupted"); |
191 | is ($alarmed, 1, "alarm should have fired"); |
192 | } |
193 | alarm 30; |
194 | |
195 | #ok (eof RIGHT, "right is at EOF"); |
196 | |
197 | foreach (@gripping) { |
198 | is (syswrite (RIGHT, $_), length $_, "syswrite to right"); |
199 | } |
200 | |
201 | $total = join '', @gripping; |
202 | foreach $expect (@gripping) { |
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203 | undef $buffer; |
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204 | is (sysread (LEFT, $buffer, length $total), length $expect, "read on left"); |
205 | is ($buffer, $expect, "content what we expected?"); |
206 | } |
207 | |
208 | ok (close LEFT, "close left"); |
209 | ok (close RIGHT, "close right"); |
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210 | |
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211 | } # end of DGRAM SKIP |
212 | |
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213 | kill "INT", $child or warn "Failed to kill child process $child: $!"; |
214 | exit 0; |