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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 = $Config{'d_fork'} |
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11 | || ($^O eq 'MSWin32' && $Config{useithreads} |
12 | && $Config{ccflags} =~ /-DPERL_IMPLICIT_SYS\b/); |
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13 | |
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14 | |
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15 | if ($^O eq "hpux" or $Config{'extensions'} !~ /\bSocket\b/ && |
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16 | !(($^O eq 'VMS') && $Config{d_socket})) { |
17 | print "1..0\n"; |
18 | exit 0; |
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19 | } |
20 | |
21 | # Too many things in this test will hang forever if something is wrong, |
22 | # so we need a self destruct timer. And IO can hang despite an alarm. |
23 | |
24 | # This is convoluted, but we must fork before Test::More, else child's |
25 | # Test::More thinks that it ran no tests, and prints a message to that |
26 | # effect |
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27 | if( $can_fork) { |
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28 | my $parent = $$; |
29 | $child = fork; |
30 | die "Fork failed" unless defined $child; |
31 | if (!$child) { |
32 | $SIG{INT} = sub {exit 0}; # You have 60 seconds. Your time starts now. |
33 | my $must_finish_by = time + 60; |
34 | my $remaining; |
35 | while ($remaining = time - $must_finish_by) { |
36 | sleep $remaining; |
37 | } |
38 | warn "Something unexpectedly hung during testing"; |
39 | kill "INT", $parent or die "Kill failed: $!"; |
40 | exit 1; |
41 | } |
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42 | } |
43 | } |
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44 | |
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45 | use Socket; |
46 | use Test::More; |
47 | use strict; |
48 | use warnings; |
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49 | use Errno; |
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50 | |
51 | my $skip_reason; |
52 | |
53 | if( !$Config{d_alarm} ) { |
54 | plan skip_all => "alarm() not implemented on this platform"; |
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55 | } elsif( !$can_fork ) { |
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56 | plan skip_all => "fork() not implemented on this platform"; |
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57 | } else { |
58 | # This should fail but not die if there is real socketpair |
59 | eval {socketpair LEFT, RIGHT, -1, -1, -1}; |
60 | if ($@ =~ /^Unsupported socket function "socketpair" called/) { |
61 | plan skip_all => 'No socketpair (real or emulated)'; |
62 | } else { |
63 | eval {AF_UNIX}; |
64 | if ($@ =~ /^Your vendor has not defined Socket macro AF_UNIX/) { |
65 | plan skip_all => 'No AF_UNIX'; |
66 | } else { |
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67 | plan tests => 45; |
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68 | } |
69 | } |
70 | } |
71 | |
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72 | # But we'll install an alarm handler in case any of the races below fail. |
73 | $SIG{ALRM} = sub {die "Unexpected alarm during testing"}; |
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74 | |
75 | ok (socketpair (LEFT, RIGHT, AF_UNIX, SOCK_STREAM, PF_UNSPEC), |
76 | "socketpair (LEFT, RIGHT, AF_UNIX, SOCK_STREAM, PF_UNSPEC)") |
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77 | or print "# \$\! = $!\n"; |
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78 | |
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79 | binmode(LEFT, ":bytes"); |
80 | binmode(RIGHT, ":bytes"); |
81 | |
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82 | my @left = ("hello ", "world\n"); |
83 | my @right = ("perl ", "rules!"); # Not like I'm trying to bias any survey here. |
84 | |
85 | foreach (@left) { |
86 | # is (syswrite (LEFT, $_), length $_, "write " . _qq ($_) . " to left"); |
87 | is (syswrite (LEFT, $_), length $_, "syswrite to left"); |
88 | } |
89 | foreach (@right) { |
90 | # is (syswrite (RIGHT, $_), length $_, "write " . _qq ($_) . " to right"); |
91 | is (syswrite (RIGHT, $_), length $_, "syswrite to right"); |
92 | } |
93 | |
94 | # stream socket, so our writes will become joined: |
95 | my ($buffer, $expect); |
96 | $expect = join '', @right; |
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97 | undef $buffer; |
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98 | is (read (LEFT, $buffer, length $expect), length $expect, "read on left"); |
99 | is ($buffer, $expect, "content what we expected?"); |
100 | $expect = join '', @left; |
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101 | undef $buffer; |
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102 | is (read (RIGHT, $buffer, length $expect), length $expect, "read on right"); |
103 | is ($buffer, $expect, "content what we expected?"); |
104 | |
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105 | ok (shutdown(LEFT, SHUT_WR), "shutdown left for writing"); |
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106 | # This will hang forever if eof is buggy, and alarm doesn't interrupt system |
107 | # Calls. Hence the child process minder. |
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108 | { |
109 | local $SIG{ALRM} = sub { warn "EOF on right took over 3 seconds" }; |
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110 | local $TODO = "Known problems with unix sockets on $^O" |
111 | if $^O eq 'hpux' || $^O eq 'unicosmk'; |
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112 | alarm 3; |
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113 | $! = 0; |
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114 | ok (eof RIGHT, "right is at EOF"); |
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115 | is ($!, '', 'and $! should report no error'); |
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116 | alarm 60; |
117 | } |
118 | |
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119 | my $err = $!; |
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120 | $SIG{PIPE} = 'IGNORE'; |
121 | { |
122 | local $SIG{ALRM} |
123 | = sub { warn "syswrite to left didn't fail within 3 seconds" }; |
124 | alarm 3; |
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125 | # Split the system call from the is() - is() does IO so |
126 | # (say) a flush may do a seek which on a pipe may disturb errno |
127 | my $ans = syswrite (LEFT, "void"); |
128 | $err = $!; |
129 | is ($ans, undef, "syswrite to shutdown left should fail"); |
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130 | alarm 60; |
131 | } |
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132 | { |
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133 | # This may need skipping on some OSes - restoring value saved above |
134 | # should help |
135 | $! = $err; |
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136 | ok (($!{EPIPE} or $!{ESHUTDOWN}), '$! should be EPIPE or ESHUTDOWN') |
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137 | or printf "\$\!=%d(%s)\n", $err, $err; |
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138 | } |
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139 | |
140 | my @gripping = (chr 255, chr 127); |
141 | foreach (@gripping) { |
142 | is (syswrite (RIGHT, $_), length $_, "syswrite to right"); |
143 | } |
144 | |
145 | ok (!eof LEFT, "left is not at EOF"); |
146 | |
147 | $expect = join '', @gripping; |
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148 | undef $buffer; |
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149 | is (read (LEFT, $buffer, length $expect), length $expect, "read on left"); |
150 | is ($buffer, $expect, "content what we expected?"); |
151 | |
152 | ok (close LEFT, "close left"); |
153 | ok (close RIGHT, "close right"); |
154 | |
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155 | |
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156 | # And now datagrams |
157 | # I suspect we also need a self destruct time-bomb for these, as I don't see any |
158 | # guarantee that the stack won't drop a UDP packet, even if it is for localhost. |
159 | |
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160 | SKIP: { |
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161 | skip "No usable SOCK_DGRAM for socketpair", 24 if ($^O =~ /^(MSWin32|os2)\z/); |
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162 | local $TODO = "socketpair not supported on $^O" if $^O eq 'nto'; |
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163 | |
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164 | ok (socketpair (LEFT, RIGHT, AF_UNIX, SOCK_DGRAM, PF_UNSPEC), |
165 | "socketpair (LEFT, RIGHT, AF_UNIX, SOCK_DGRAM, PF_UNSPEC)") |
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166 | or print "# \$\! = $!\n"; |
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167 | |
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168 | binmode(LEFT, ":bytes"); |
169 | binmode(RIGHT, ":bytes"); |
170 | |
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171 | foreach (@left) { |
172 | # is (syswrite (LEFT, $_), length $_, "write " . _qq ($_) . " to left"); |
173 | is (syswrite (LEFT, $_), length $_, "syswrite to left"); |
174 | } |
175 | foreach (@right) { |
176 | # is (syswrite (RIGHT, $_), length $_, "write " . _qq ($_) . " to right"); |
177 | is (syswrite (RIGHT, $_), length $_, "syswrite to right"); |
178 | } |
179 | |
180 | # stream socket, so our writes will become joined: |
181 | my ($total); |
182 | $total = join '', @right; |
183 | foreach $expect (@right) { |
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184 | undef $buffer; |
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185 | is (sysread (LEFT, $buffer, length $total), length $expect, "read on left"); |
186 | is ($buffer, $expect, "content what we expected?"); |
187 | } |
188 | $total = join '', @left; |
189 | foreach $expect (@left) { |
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190 | undef $buffer; |
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191 | is (sysread (RIGHT, $buffer, length $total), length $expect, "read on right"); |
192 | is ($buffer, $expect, "content what we expected?"); |
193 | } |
194 | |
195 | ok (shutdown(LEFT, 1), "shutdown left for writing"); |
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196 | |
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197 | # eof uses buffering. eof is indicated by a sysread of zero. |
198 | # but for a datagram socket there's no way it can know nothing will ever be |
199 | # sent |
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200 | SKIP: { |
201 | skip "$^O does length 0 udp reads", 2 if ($^O eq 'os390'); |
202 | |
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203 | my $alarmed = 0; |
204 | local $SIG{ALRM} = sub { $alarmed = 1; }; |
205 | print "# Approximate forever as 3 seconds. Wait 'forever'...\n"; |
206 | alarm 3; |
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207 | undef $buffer; |
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208 | is (sysread (RIGHT, $buffer, 1), undef, |
209 | "read on right should be interrupted"); |
210 | is ($alarmed, 1, "alarm should have fired"); |
211 | } |
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212 | |
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213 | alarm 30; |
214 | |
215 | #ok (eof RIGHT, "right is at EOF"); |
216 | |
217 | foreach (@gripping) { |
218 | is (syswrite (RIGHT, $_), length $_, "syswrite to right"); |
219 | } |
220 | |
221 | $total = join '', @gripping; |
222 | foreach $expect (@gripping) { |
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223 | undef $buffer; |
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224 | is (sysread (LEFT, $buffer, length $total), length $expect, "read on left"); |
225 | is ($buffer, $expect, "content what we expected?"); |
226 | } |
227 | |
228 | ok (close LEFT, "close left"); |
229 | ok (close RIGHT, "close right"); |
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230 | |
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231 | } # end of DGRAM SKIP |
232 | |
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233 | kill "INT", $child or warn "Failed to kill child process $child: $!"; |
234 | exit 0; |