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change#3534 didn't preserve undef return values from caller()
[perl5.git] / t / io / pipe.t
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378cc40b
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1#!./perl
2
79072805 3# $RCSfile: pipe.t,v $$Revision: 4.1 $$Date: 92/08/07 18:27:31 $
378cc40b 4
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5BEGIN {
6 chdir 't' if -d 't';
93430cb4 7 unshift @INC, '../lib';
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8 require Config; import Config;
9 unless ($Config{'d_fork'}) {
45c0de28 10 print "1..0 # Skip: no fork\n";
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11 exit 0;
12 }
13}
14
378cc40b 15$| = 1;
06eaf0bc 16print "1..14\n";
378cc40b 17
092bebab 18# External program 'tr' assumed.
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19open(PIPE, "|-") || (exec 'tr', 'YX', 'ko');
20print PIPE "Xk 1\n";
21print PIPE "oY 2\n";
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22close PIPE;
23
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24if ($^O eq 'vmesa') {
25 # Doesn't work, yet.
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26 for (3..6) {
27 print "ok $_ # skipped\n";
28 }
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29} else {
30 if (open(PIPE, "-|")) {
31 while(<PIPE>) {
32 s/^not //;
33 print;
34 }
35 close PIPE; # avoid zombies which disrupt test 12
36 }
37 else {
38 # External program 'echo' assumed.
39 print STDOUT "not ok 3\n";
40 exec 'echo', 'not ok 4';
378cc40b 41 }
ac58e20f 42
092bebab 43 pipe(READER,WRITER) || die "Can't open pipe";
ac58e20f 44
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45 if ($pid = fork) {
46 close WRITER;
47 while(<READER>) {
48 s/^not //;
49 y/A-Z/a-z/;
50 print;
51 }
52 close READER; # avoid zombies which disrupt test 12
53 }
54 else {
55 die "Couldn't fork" unless defined $pid;
56 close READER;
57 print WRITER "not ok 5\n";
58 open(STDOUT,">&WRITER") || die "Can't dup WRITER to STDOUT";
59 close WRITER;
60 # External program 'echo' assumed.
61 exec 'echo', 'not ok 6';
ac58e20f 62 }
ac58e20f 63}
d6a255e6 64wait; # Collect from $pid
ac58e20f 65
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66pipe(READER,WRITER) || die "Can't open pipe";
67close READER;
68
69$SIG{'PIPE'} = 'broken_pipe';
70
71sub broken_pipe {
1d2dff63 72 $SIG{'PIPE'} = 'IGNORE'; # loop preventer
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73 print "ok 7\n";
74}
75
76print WRITER "not ok 7\n";
77close WRITER;
3d57aefb 78sleep 1;
ac58e20f 79print "ok 8\n";
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80
81# VMS doesn't like spawning subprocesses that are still connected to
1d3434b8 82# STDOUT. Someone should modify tests #9 to #12 to work with VMS.
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83
84if ($^O eq 'VMS') {
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85 print "ok 9 # skipped\n";
86 print "ok 10 # skipped\n";
87 print "ok 11 # skipped\n";
88 print "ok 12 # skipped\n";
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89 exit;
90}
91
e5e1b98b 92if ($Config{d_sfio} || $^O eq 'machten' || $^O eq 'beos' || $^O eq 'posix-bc') {
03136e13 93 # Sfio doesn't report failure when closing a broken pipe
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94 # that has pending output. Go figure. MachTen doesn't either,
95 # but won't write to broken pipes, so nothing's pending at close.
6ee623d5 96 # BeOS will not write to broken pipes, either.
e5e1b98b 97 # Nor does POSIX-BC.
6fd78b6e 98 print "ok 9 # skipped\n";
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99}
100else {
101 local $SIG{PIPE} = 'IGNORE';
102 open NIL, '|true' or die "open failed: $!";
103 sleep 2;
104 print NIL 'foo' or die "print failed: $!";
105 if (close NIL) {
106 print "not ok 9\n";
107 }
108 else {
109 print "ok 9\n";
110 }
111}
112
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113if ($^O eq 'vmesa') {
114 # These don't work, yet.
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115 print "ok 10 # skipped\n";
116 print "ok 11 # skipped\n";
117 print "ok 12 # skipped\n";
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118 exit;
119}
120
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121# check that errno gets forced to 0 if the piped program exited non-zero
122open NIL, '|exit 23;' or die "fork failed: $!";
123$! = 1;
124if (close NIL) {
125 print "not ok 10\n# successful close\n";
126}
127elsif ($! != 0) {
128 print "not ok 10\n# errno $!\n";
129}
130elsif ($? == 0) {
131 print "not ok 10\n# status 0\n";
132}
133else {
134 print "ok 10\n";
135}
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136
137# check that status for the correct process is collected
138my $zombie = fork or exit 37;
139my $pipe = open *FH, "sleep 2;exit 13|" or die "Open: $!\n";
140$SIG{ALRM} = sub { return };
141alarm(1);
142my $close = close FH;
143if ($? == 13*256 && ! length $close && ! $!) {
144 print "ok 11\n";
145} else {
146 print "not ok 11\n# close $close\$?=$? \$!=", $!+0, ":$!\n";
147};
148my $wait = wait;
149if ($? == 37*256 && $wait == $zombie && ! $!) {
150 print "ok 12\n";
151} else {
062dddbe 152 print "not ok 12\n# pid=$wait first=$pid pipe=$pipe zombie=$zombie me=$$ \$?=$? \$!=", $!+0, ":$!\n";
1d3434b8 153}
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154
155# Test new semantics for missing command in piped open
156# 19990114 M-J. Dominus mjd@plover.com
157{ local *P;
158 print (((open P, "| " ) ? "not " : ""), "ok 13\n");
159 print (((open P, " |" ) ? "not " : ""), "ok 14\n");
160}