#!perl -w # Test O_EXLOCK use Test::More; use strict; use Fcntl; BEGIN { # see if we have O_EXLOCK eval { &Fcntl::O_EXLOCK; }; if ($@) { plan skip_all => 'Do not seem to have O_EXLOCK'; } else { plan tests => 4; use_ok( "File::Temp" ); } } # Need Symbol package for lexical filehandle on older perls require Symbol if $] < 5.006; # Get a tempfile with O_EXLOCK my $fh = new File::Temp(); ok( -e "$fh", "temp file is present" ); # try to open it with a lock my $flags = O_CREAT | O_RDWR | O_EXLOCK; my $timeout = 5; my $status; eval { local $SIG{ALRM} = sub { die "alarm\n" }; # NB: \n required alarm $timeout; my $newfh; $newfh = &Symbol::gensym if $] < 5.006; $status = sysopen($newfh, "$fh", $flags, 0600); alarm 0; }; if ($@) { die unless $@ eq "alarm\n"; # propagate unexpected errors # timed out } ok( !$status, "File $fh is locked" ); # Now get a tempfile with locking disabled $fh = new File::Temp( EXLOCK => 0 ); eval { local $SIG{ALRM} = sub { die "alarm\n" }; # NB: \n required alarm $timeout; my $newfh; $newfh = &Symbol::gensym if $] < 5.006; $status = sysopen($newfh, "$fh", $flags, 0600); alarm 0; }; if ($@) { die unless $@ eq "alarm\n"; # propagate unexpected errors # timed out } ok( $status, "File $fh is not locked");