1#!./perl 2 3##################################################################### 4# 5# Test for process id return value from open 6# Ronald Schmidt (The Software Path) RonaldWS@software-path.com 7# 8##################################################################### 9 10BEGIN { 11 chdir 't' if -d 't'; 12 @INC = '../lib'; 13 require './test.pl'; 14} 15 16if ($^O eq 'dos' || $^O eq 'MacOS') { 17 skip_all("no multitasking"); 18} 19 20plan tests => 10; 21 22 23use Config; 24$| = 1; 25$SIG{PIPE} = 'IGNORE'; 26 27my $perl = which_perl(); 28$perl .= qq[ "-I../lib"]; 29 30# 31# commands run 4 perl programs. Two of these programs write a 32# short message to STDOUT and exit. Two of these programs 33# read from STDIN. One reader never exits and must be killed. 34# the other reader reads one line, waits a few seconds and then 35# exits to test the waitpid function. 36# 37$cmd1 = qq/$perl -e "\$|=1; print qq[first process\\n]; sleep 30;"/; 38$cmd2 = qq/$perl -e "\$|=1; print qq[second process\\n]; sleep 30;"/; 39$cmd3 = qq/$perl -e "print <>;"/; # hangs waiting for end of STDIN 40$cmd4 = qq/$perl -e "print scalar <>;"/; 41 42#warn "#$cmd1\n#$cmd2\n#$cmd3\n#$cmd4\n"; 43 44# start the processes 45ok( $pid1 = open(FH1, "$cmd1 |"), 'first process started'); 46ok( $pid2 = open(FH2, "$cmd2 |"), ' second' ); 47ok( $pid3 = open(FH3, "| $cmd3"), ' third' ); 48ok( $pid4 = open(FH4, "| $cmd4"), ' fourth' ); 49 50print "# pids were $pid1, $pid2, $pid3, $pid4\n"; 51 52my $killsig = 'HUP'; 53$killsig = 1 unless $Config{sig_name} =~ /\bHUP\b/; 54 55# get message from first process and kill it 56chomp($from_pid1 = scalar(<FH1>)); 57is( $from_pid1, 'first process', 'message from first process' ); 58 59$kill_cnt = kill $killsig, $pid1; 60is( $kill_cnt, 1, 'first process killed' ) || 61 print "# errno == $!\n"; 62 63# get message from second process and kill second process and reader process 64chomp($from_pid2 = scalar(<FH2>)); 65is( $from_pid2, 'second process', 'message from second process' ); 66 67$kill_cnt = kill $killsig, $pid2, $pid3; 68is( $kill_cnt, 2, 'killing procs 2 & 3' ) || 69 print "# errno == $!\n"; 70 71 72# send one expected line of text to child process and then wait for it 73select(FH4); $| = 1; select(STDOUT); 74 75printf FH4 "ok %d - text sent to fourth process\n", curr_test(); 76next_test(); 77print "# waiting for process $pid4 to exit\n"; 78$reap_pid = waitpid $pid4, 0; 79is( $reap_pid, $pid4, 'fourth process reaped' ); 80 81