| 1 | #!/usr/bin/perl -w |
| 2 | use strict; |
| 3 | use vars qw($Needs_Write $Verbose @Changed); |
| 4 | use File::Compare; |
| 5 | use Symbol; |
| 6 | |
| 7 | # Common functions needed by the regen scripts |
| 8 | |
| 9 | $Needs_Write = $^O eq 'cygwin' || $^O eq 'os2' || $^O eq 'MSWin32'; |
| 10 | |
| 11 | $Verbose = 0; |
| 12 | @ARGV = grep { not($_ eq '-q' and $Verbose = -1) } |
| 13 | grep { not($_ eq '-v' and $Verbose = 1) } @ARGV; |
| 14 | |
| 15 | END { |
| 16 | print STDOUT "Changed: @Changed\n" if @Changed; |
| 17 | } |
| 18 | |
| 19 | sub safer_unlink { |
| 20 | my @names = @_; |
| 21 | my $cnt = 0; |
| 22 | |
| 23 | my $name; |
| 24 | foreach $name (@names) { |
| 25 | next unless -e $name; |
| 26 | chmod 0777, $name if $Needs_Write; |
| 27 | ( CORE::unlink($name) and ++$cnt |
| 28 | or warn "Couldn't unlink $name: $!\n" ); |
| 29 | } |
| 30 | return $cnt; |
| 31 | } |
| 32 | |
| 33 | sub safer_rename_silent { |
| 34 | my ($from, $to) = @_; |
| 35 | |
| 36 | # Some dosish systems can't rename over an existing file: |
| 37 | safer_unlink $to; |
| 38 | chmod 0600, $from if $Needs_Write; |
| 39 | rename $from, $to; |
| 40 | } |
| 41 | |
| 42 | sub rename_if_different { |
| 43 | my ($from, $to) = @_; |
| 44 | |
| 45 | if (compare($from, $to) == 0) { |
| 46 | warn "no changes between '$from' & '$to'\n" if $Verbose > 0; |
| 47 | safer_unlink($from); |
| 48 | return; |
| 49 | } |
| 50 | warn "changed '$from' to '$to'\n" if $Verbose > 0; |
| 51 | push @Changed, $to unless $Verbose < 0; |
| 52 | safer_rename_silent($from, $to) or die "renaming $from to $to: $!"; |
| 53 | } |
| 54 | |
| 55 | # Saf*er*, but not totally safe. And assumes always open for output. |
| 56 | sub safer_open { |
| 57 | my $name = shift; |
| 58 | my $fh = gensym; |
| 59 | open $fh, ">$name" or die "Can't create $name: $!"; |
| 60 | *{$fh}->{SCALAR} = $name; |
| 61 | binmode $fh; |
| 62 | $fh; |
| 63 | } |
| 64 | |
| 65 | sub safer_close { |
| 66 | my $fh = shift; |
| 67 | close $fh or die 'Error closing ' . *{$fh}->{SCALAR} . ": $!"; |
| 68 | } |
| 69 | |
| 70 | 1; |