4 #####################################################################
6 # Test for process id return value from open
7 # Ronald Schmidt (The Software Path) RonaldWS@software-path.com
9 #####################################################################
13 unshift @INC, '../lib';
19 $SIG{PIPE} = 'IGNORE';
23 $perl = "$^X -I../lib";
26 # commands run 4 perl programs. Two of these programs write a
27 # short message to STDOUT and exit. Two of these programs
28 # read from STDIN. One reader never exits and must be killed.
29 # the other reader reads one line, waits a few seconds and then
30 # exits to test the waitpid function.
32 $cmd1 = qq/$perl -e "use FileHandle; autoflush STDOUT 1; / .
33 qq/print qq[first process\\n]; sleep 30;"/;
34 $cmd2 = qq/$perl -e "use FileHandle; autoflush STDOUT 1; / .
35 qq/print qq[second process\\n]; sleep 30;"/;
36 $cmd3 = qq/$perl -e "print <>;"/; # hangs waiting for end of STDIN
37 $cmd4 = qq/$perl -e "print scalar <>;"/;
39 #warn "#$cmd1\n#$cmd2\n#$cmd3\n#$cmd4\n";
42 $pid1 = open(FH1, "$cmd1 |") or print "not ";
44 $pid2 = open(FH2, "$cmd2 |") or print "not ";
46 $pid3 = open(FH3, "| $cmd3") or print "not ";
48 $pid4 = open(FH4, "| $cmd4") or print "not ";
51 print "# pids were $pid1, $pid2, $pid3, $pid4\n";
53 # get message from first process and kill it
54 chomp($from_pid1 = scalar(<FH1>));
55 print "# child1 returned [$from_pid1]\nnot "
56 unless $from_pid1 eq 'first process';
58 $kill_cnt = kill STOP, $pid1;
59 print "not " unless $kill_cnt == 1;
62 # get message from second process and kill second process and reader process
63 chomp($from_pid2 = scalar(<FH2>));
64 print "# child2 returned [$from_pid2]\nnot "
65 unless $from_pid2 eq 'second process';
67 $kill_cnt = kill STOP, $pid2, $pid3;
68 print "not " unless $kill_cnt == 2;
71 # send one expected line of text to child process and then wait for it
74 print "# waiting for process $pid4 to exit\n";
75 $reap_pid = waitpid $pid4, 0;
76 print "# reaped pid $reap_pid != $pid4\nnot "
77 unless $reap_pid == $pid4;