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#!./perl
# $RCSfile: pipe.t,v $$Revision: 4.1 $$Date: 92/08/07 18:27:31 $
BEGIN {
chdir 't' if -d 't';
@INC = '../lib';
require Config; import Config;
unless ($Config{'d_fork'}) {
print "1..0\n";
exit 0;
}
}
$| = 1;
print "1..12\n";
# External program 'tr' assumed.
open(PIPE, "|-") || (exec 'tr', 'YX', 'ko');
print PIPE "Xk 1\n";
print PIPE "oY 2\n";
close PIPE;
if ($^O eq 'vmesa') {
# Doesn't work, yet.
print "ok 3\n";
print "ok 4\n";
print "ok 5\n";
print "ok 6\n";
} else {
if (open(PIPE, "-|")) {
while(<PIPE>) {
s/^not //;
print;
}
close PIPE; # avoid zombies which disrupt test 12
}
else {
# External program 'echo' assumed.
print STDOUT "not ok 3\n";
exec 'echo', 'not ok 4';
}
pipe(READER,WRITER) || die "Can't open pipe";
if ($pid = fork) {
close WRITER;
while(<READER>) {
s/^not //;
y/A-Z/a-z/;
print;
}
close READER; # avoid zombies which disrupt test 12
}
else {
die "Couldn't fork" unless defined $pid;
close READER;
print WRITER "not ok 5\n";
open(STDOUT,">&WRITER") || die "Can't dup WRITER to STDOUT";
close WRITER;
# External program 'echo' assumed.
exec 'echo', 'not ok 6';
}
}
pipe(READER,WRITER) || die "Can't open pipe";
close READER;
$SIG{'PIPE'} = 'broken_pipe';
sub broken_pipe {
$SIG{'PIPE'} = 'IGNORE'; # loop preventer
print "ok 7\n";
}
print WRITER "not ok 7\n";
close WRITER;
sleep 1;
print "ok 8\n";
# VMS doesn't like spawning subprocesses that are still connected to
# STDOUT. Someone should modify tests #9 to #12 to work with VMS.
if ($^O eq 'VMS') {
print "ok 9\n";
print "ok 10\n";
print "ok 11\n";
print "ok 12\n";
exit;
}
if ($Config{d_sfio} || $^O eq machten || $^O eq beos) {
# Sfio doesn't report failure when closing a broken pipe
# that has pending output. Go figure. MachTen doesn't either,
# but won't write to broken pipes, so nothing's pending at close.
# BeOS will not write to broken pipes, either.
print "ok 9\n";
}
else {
local $SIG{PIPE} = 'IGNORE';
open NIL, '|true' or die "open failed: $!";
sleep 2;
print NIL 'foo' or die "print failed: $!";
if (close NIL) {
print "not ok 9\n";
}
else {
print "ok 9\n";
}
}
if ($^O eq 'vmesa') {
# These don't work, yet.
print "ok 10\n";
print "ok 11\n";
print "ok 12\n";
exit;
}
# check that errno gets forced to 0 if the piped program exited non-zero
open NIL, '|exit 23;' or die "fork failed: $!";
$! = 1;
if (close NIL) {
print "not ok 10\n# successful close\n";
}
elsif ($! != 0) {
print "not ok 10\n# errno $!\n";
}
elsif ($? == 0) {
print "not ok 10\n# status 0\n";
}
else {
print "ok 10\n";
}
# check that status for the correct process is collected
wait; # Collect from $pid
my $zombie = fork or exit 37;
my $pipe = open *FH, "sleep 2;exit 13|" or die "Open: $!\n";
$SIG{ALRM} = sub { return };
alarm(1);
my $close = close FH;
if ($? == 13*256 && ! length $close && ! $!) {
print "ok 11\n";
} else {
print "not ok 11\n# close $close\$?=$? \$!=", $!+0, ":$!\n";
};
my $wait = wait;
if ($? == 37*256 && $wait == $zombie && ! $!) {
print "ok 12\n";
} else {
print "not ok 12\n# pid=$wait first=$pid pipe=$pipe zombie=$zombie me=$$ \$?=$? \$!=", $!+0, ":$!\n";
}
|
