3 #####################################################################
5 # Test for process id return value from open
6 # Ronald Schmidt (The Software Path) RonaldWS@software-path.com
8 #####################################################################
12 unshift @INC, '../lib';
18 $SIG{PIPE} = 'IGNORE';
22 $perl = "$^X -I../lib";
25 # commands run 4 perl programs. Two of these programs write a
26 # short message to STDOUT and exit. Two of these programs
27 # read from STDIN. One reader never exits and must be killed.
28 # the other reader reads one line, waits a few seconds and then
29 # exits to test the waitpid function.
31 $cmd1 = qq/$perl -e "use FileHandle; autoflush STDOUT 1; / .
32 qq/print qq[first process\\n]; sleep 30;"/;
33 $cmd2 = qq/$perl -e "use FileHandle; autoflush STDOUT 1; / .
34 qq/print qq[second process\\n]; sleep 30;"/;
35 $cmd3 = qq/$perl -e "print <>;"/; # hangs waiting for end of STDIN
36 $cmd4 = qq/$perl -e "print scalar <>;"/;
38 #warn "#$cmd1\n#$cmd2\n#$cmd3\n#$cmd4\n";
41 $pid1 = open(FH1, "$cmd1 |") or print "not ";
43 $pid2 = open(FH2, "$cmd2 |") or print "not ";
45 $pid3 = open(FH3, "| $cmd3") or print "not ";
47 $pid4 = open(FH4, "| $cmd4") or print "not ";
50 print "# pids were $pid1, $pid2, $pid3, $pid4\n";
52 # get message from first process and kill it
53 chomp($from_pid1 = scalar(<FH1>));
54 print "# child1 returned [$from_pid1]\nnot "
55 unless $from_pid1 eq 'first process';
57 $kill_cnt = kill 'HUP', $pid1;
58 print "not " unless $kill_cnt == 1;
61 # get message from second process and kill second process and reader process
62 chomp($from_pid2 = scalar(<FH2>));
63 print "# child2 returned [$from_pid2]\nnot "
64 unless $from_pid2 eq 'second process';
66 $kill_cnt = kill 'HUP', $pid2, $pid3;
67 print "not " unless $kill_cnt == 2;
70 # send one expected line of text to child process and then wait for it
73 print "# waiting for process $pid4 to exit\n";
74 $reap_pid = waitpid $pid4, 0;
75 print "# reaped pid $reap_pid != $pid4\nnot "
76 unless $reap_pid == $pid4;