X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=t%2Fio%2Fpipe.t;h=500832595e31bef6a6307a201672e88dbce28345;hb=569bd3158af2276a406770e3d68e76b7da59b730;hp=95df4dccb6589aad2b6d1d4dbda93ff114f3c935;hpb=c07a80fdfe3926b5eb0585b674aa5d1f57b32ade;p=p5sagit%2Fp5-mst-13.2.git

diff --git a/t/io/pipe.t b/t/io/pipe.t
index 95df4dc..5008325 100755
--- a/t/io/pipe.t
+++ b/t/io/pipe.t
@@ -1,45 +1,65 @@
 #!./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 # Skip: no fork\n";
+	exit 0;
+    }
+}
 
 $| = 1;
-print "1..8\n";
+print "1..16\n";
 
+# External program 'tr' assumed.
 open(PIPE, "|-") || (exec 'tr', 'YX', 'ko');
 print PIPE "Xk 1\n";
 print PIPE "oY 2\n";
 close PIPE;
 
-if (open(PIPE, "-|")) {
-    while(<PIPE>) {
-	s/^not //;
-	print;
+if ($^O eq 'vmesa') {
+    # Doesn't work, yet.
+    for (3..6) {
+	print "ok $_ # skipped\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';
     }
-}
-else {
-    print STDOUT "not ok 3\n";
-    exec 'echo', 'not ok 4';
-}
 
-pipe(READER,WRITER) || die "Can't open pipe";
+    pipe(READER,WRITER) || die "Can't open pipe";
 
-if ($pid = fork) {
-    close WRITER;
-    while(<READER>) {
-	s/^not //;
-	y/A-Z/a-z/;
-	print;
+    if ($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';
     }
 }
-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;
-    exec 'echo', 'not ok 6';
-}
-
+wait;				# Collect from $pid
 
 pipe(READER,WRITER) || die "Can't open pipe";
 close READER;
@@ -47,10 +67,138 @@ 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 ($^O eq 'VMS') {
+    print "ok 9 # skipped\n";
+    print "ok 10 # skipped\n";
+    print "ok 11 # skipped\n";
+    print "ok 12 # skipped\n";
+    exit;
+}
+
+if ($Config{d_sfio} || $^O eq 'machten' || $^O eq 'beos' || $^O eq 'posix-bc') {
+    # 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.
+    # Nor does POSIX-BC.
+    print "ok 9 # skipped\n";
+}
+else {
+    local $SIG{PIPE} = 'IGNORE';
+    open NIL, '|true'	or die "open failed: $!";
+    sleep 5;
+    if (print NIL 'foo') {
+	# If print was allowed we had better get an error on close
+	if (close NIL) {
+	    print "not ok 9\n";
+	}
+	else {
+	    print "ok 9\n";
+	}
+    }
+    else {
+	# If print failed, the close should be clean
+	if (close NIL) {
+	    print "ok 9\n";
+	}
+	else {
+	    print "not ok 9\n";
+	}
+    }
+}
+
+if ($^O eq 'vmesa') {
+    # These don't work, yet.
+    print "ok 10 # skipped\n";
+    print "ok 11 # skipped\n";
+    print "ok 12 # skipped\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";
+}
+
+if ($^O eq 'mpeix') {
+    print "ok 11 # skipped\n";
+    print "ok 12 # skipped\n";
+} else {
+    # check that status for the correct process is collected
+    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";
+    }
+}
+
+# Test new semantics for missing command in piped open
+# 19990114 M-J. Dominus mjd@plover.com
+{ local *P;
+  print (((open P, "|    " ) ? "not " : ""), "ok 13\n");
+  print (((open P, "     |" ) ? "not " : ""), "ok 14\n");
+}
+
+# check that status is unaffected by implicit close
+{
+    local(*NIL);
+    open NIL, '|exit 23;' or die "fork failed: $!";
+    $? = 42;
+    # NIL implicitly closed here
+}
+if ($? != 42) {
+    print "# status $?, expected 42\nnot ";
+}
+print "ok 15\n";
+$? = 0;
+
+# check that child is reaped if the piped program can't be executed
+{
+  open NIL, '/no_such_process |';
+  close NIL;
+
+  my $child = 0;
+  eval {
+    local $SIG{ALRM} = sub { die; };
+    alarm 2;
+    $child = wait;
+    alarm 0;
+  };
+
+  print "not " if $child != -1;
+  print "ok 16\n";
+}