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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 | |
79 | my @left = ("hello ", "world\n"); |
80 | my @right = ("perl ", "rules!"); # Not like I'm trying to bias any survey here. |
81 | |
82 | foreach (@left) { |
83 | # is (syswrite (LEFT, $_), length $_, "write " . _qq ($_) . " to left"); |
84 | is (syswrite (LEFT, $_), length $_, "syswrite to left"); |
85 | } |
86 | foreach (@right) { |
87 | # is (syswrite (RIGHT, $_), length $_, "write " . _qq ($_) . " to right"); |
88 | is (syswrite (RIGHT, $_), length $_, "syswrite to right"); |
89 | } |
90 | |
91 | # stream socket, so our writes will become joined: |
92 | my ($buffer, $expect); |
93 | $expect = join '', @right; |
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94 | undef $buffer; |
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95 | is (read (LEFT, $buffer, length $expect), length $expect, "read on left"); |
96 | is ($buffer, $expect, "content what we expected?"); |
97 | $expect = join '', @left; |
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98 | undef $buffer; |
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99 | is (read (RIGHT, $buffer, length $expect), length $expect, "read on right"); |
100 | is ($buffer, $expect, "content what we expected?"); |
101 | |
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102 | ok (shutdown(LEFT, SHUT_WR), "shutdown left for writing"); |
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103 | # This will hang forever if eof is buggy, and alarm doesn't interrupt system |
104 | # Calls. Hence the child process minder. |
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105 | { |
106 | local $SIG{ALRM} = sub { warn "EOF on right took over 3 seconds" }; |
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107 | local $TODO = "Known problems with unix sockets on $^O" |
108 | if $^O eq 'hpux' || $^O eq 'unicosmk'; |
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109 | alarm 3; |
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110 | $! = 0; |
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111 | ok (eof RIGHT, "right is at EOF"); |
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112 | is ($!, '', 'and $! should report no error'); |
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113 | alarm 60; |
114 | } |
115 | |
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116 | my $err = $!; |
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117 | $SIG{PIPE} = 'IGNORE'; |
118 | { |
119 | local $SIG{ALRM} |
120 | = sub { warn "syswrite to left didn't fail within 3 seconds" }; |
121 | alarm 3; |
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122 | # Split the system call from the is() - is() does IO so |
123 | # (say) a flush may do a seek which on a pipe may disturb errno |
124 | my $ans = syswrite (LEFT, "void"); |
125 | $err = $!; |
126 | is ($ans, undef, "syswrite to shutdown left should fail"); |
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127 | alarm 60; |
128 | } |
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129 | { |
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130 | # This may need skipping on some OSes - restoring value saved above |
131 | # should help |
132 | $! = $err; |
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133 | ok (($!{EPIPE} or $!{ESHUTDOWN}), '$! should be EPIPE or ESHUTDOWN') |
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134 | or printf "\$\!=%d(%s)\n", $err, $err; |
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135 | } |
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136 | |
137 | my @gripping = (chr 255, chr 127); |
138 | foreach (@gripping) { |
139 | is (syswrite (RIGHT, $_), length $_, "syswrite to right"); |
140 | } |
141 | |
142 | ok (!eof LEFT, "left is not at EOF"); |
143 | |
144 | $expect = join '', @gripping; |
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145 | undef $buffer; |
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146 | is (read (LEFT, $buffer, length $expect), length $expect, "read on left"); |
147 | is ($buffer, $expect, "content what we expected?"); |
148 | |
149 | ok (close LEFT, "close left"); |
150 | ok (close RIGHT, "close right"); |
151 | |
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152 | |
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153 | # And now datagrams |
154 | # I suspect we also need a self destruct time-bomb for these, as I don't see any |
155 | # guarantee that the stack won't drop a UDP packet, even if it is for localhost. |
156 | |
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157 | SKIP: { |
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158 | skip "No usable SOCK_DGRAM for socketpair", 24 if ($^O =~ /^(MSWin32|os2)\z/); |
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159 | local $TODO = "socketpair not supported on $^O" if $^O eq 'nto'; |
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160 | |
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161 | ok (socketpair (LEFT, RIGHT, AF_UNIX, SOCK_DGRAM, PF_UNSPEC), |
162 | "socketpair (LEFT, RIGHT, AF_UNIX, SOCK_DGRAM, PF_UNSPEC)") |
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163 | or print "# \$\! = $!\n"; |
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164 | |
165 | foreach (@left) { |
166 | # is (syswrite (LEFT, $_), length $_, "write " . _qq ($_) . " to left"); |
167 | is (syswrite (LEFT, $_), length $_, "syswrite to left"); |
168 | } |
169 | foreach (@right) { |
170 | # is (syswrite (RIGHT, $_), length $_, "write " . _qq ($_) . " to right"); |
171 | is (syswrite (RIGHT, $_), length $_, "syswrite to right"); |
172 | } |
173 | |
174 | # stream socket, so our writes will become joined: |
175 | my ($total); |
176 | $total = join '', @right; |
177 | foreach $expect (@right) { |
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178 | undef $buffer; |
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179 | is (sysread (LEFT, $buffer, length $total), length $expect, "read on left"); |
180 | is ($buffer, $expect, "content what we expected?"); |
181 | } |
182 | $total = join '', @left; |
183 | foreach $expect (@left) { |
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184 | undef $buffer; |
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185 | is (sysread (RIGHT, $buffer, length $total), length $expect, "read on right"); |
186 | is ($buffer, $expect, "content what we expected?"); |
187 | } |
188 | |
189 | ok (shutdown(LEFT, 1), "shutdown left for writing"); |
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190 | |
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191 | # eof uses buffering. eof is indicated by a sysread of zero. |
192 | # but for a datagram socket there's no way it can know nothing will ever be |
193 | # sent |
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194 | SKIP: { |
195 | skip "$^O does length 0 udp reads", 2 if ($^O eq 'os390'); |
196 | |
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197 | my $alarmed = 0; |
198 | local $SIG{ALRM} = sub { $alarmed = 1; }; |
199 | print "# Approximate forever as 3 seconds. Wait 'forever'...\n"; |
200 | alarm 3; |
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201 | undef $buffer; |
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202 | is (sysread (RIGHT, $buffer, 1), undef, |
203 | "read on right should be interrupted"); |
204 | is ($alarmed, 1, "alarm should have fired"); |
205 | } |
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206 | |
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207 | alarm 30; |
208 | |
209 | #ok (eof RIGHT, "right is at EOF"); |
210 | |
211 | foreach (@gripping) { |
212 | is (syswrite (RIGHT, $_), length $_, "syswrite to right"); |
213 | } |
214 | |
215 | $total = join '', @gripping; |
216 | foreach $expect (@gripping) { |
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217 | undef $buffer; |
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218 | is (sysread (LEFT, $buffer, length $total), length $expect, "read on left"); |
219 | is ($buffer, $expect, "content what we expected?"); |
220 | } |
221 | |
222 | ok (close LEFT, "close left"); |
223 | ok (close RIGHT, "close right"); |
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224 | |
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225 | } # end of DGRAM SKIP |
226 | |
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227 | kill "INT", $child or warn "Failed to kill child process $child: $!"; |
228 | exit 0; |