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1 | #!/usr/bin/perl -w |
2 | use strict; |
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3 | use vars qw($Is_W32 $Is_OS2 $Is_Cygwin $Is_NetWare $Needs_Write $Verbose |
4 | @Changed); |
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5 | use Config; # Remember, this is running using an existing perl |
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6 | use File::Compare; |
7 | use Symbol; |
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8 | |
9 | # Common functions needed by the regen scripts |
10 | |
11 | $Is_W32 = $^O eq 'MSWin32'; |
12 | $Is_OS2 = $^O eq 'os2'; |
13 | $Is_Cygwin = $^O eq 'cygwin'; |
14 | $Is_NetWare = $Config{osname} eq 'NetWare'; |
15 | if ($Is_NetWare) { |
16 | $Is_W32 = 0; |
17 | } |
18 | |
19 | $Needs_Write = $Is_OS2 || $Is_W32 || $Is_Cygwin || $Is_NetWare; |
20 | |
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21 | $Verbose = 0; |
22 | @ARGV = grep { not($_ eq '-q' and $Verbose = -1) } |
23 | grep { not($_ eq '-v' and $Verbose = 1) } @ARGV; |
24 | |
25 | END { |
26 | print STDOUT "Changed: @Changed\n" if @Changed; |
27 | } |
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28 | |
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29 | sub safer_unlink { |
30 | my @names = @_; |
31 | my $cnt = 0; |
32 | |
33 | my $name; |
34 | foreach $name (@names) { |
35 | next unless -e $name; |
36 | chmod 0777, $name if $Needs_Write; |
37 | ( CORE::unlink($name) and ++$cnt |
38 | or warn "Couldn't unlink $name: $!\n" ); |
39 | } |
40 | return $cnt; |
41 | } |
42 | |
43 | sub safer_rename_silent { |
44 | my ($from, $to) = @_; |
45 | |
46 | # Some dosish systems can't rename over an existing file: |
47 | safer_unlink $to; |
48 | chmod 0600, $from if $Needs_Write; |
49 | rename $from, $to; |
50 | } |
51 | |
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52 | sub rename_if_different { |
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53 | my ($from, $to) = @_; |
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54 | |
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55 | if (compare($from, $to) == 0) { |
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56 | warn "no changes between '$from' & '$to'\n" if $Verbose > 0; |
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57 | safer_unlink($from); |
58 | return; |
59 | } |
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60 | warn "changed '$from' to '$to'\n" if $Verbose > 0; |
61 | push @Changed, $to unless $Verbose < 0; |
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62 | safer_rename_silent($from, $to) or die "renaming $from to $to: $!"; |
63 | } |
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64 | |
65 | # Saf*er*, but not totally safe. And assumes always open for output. |
66 | sub safer_open { |
67 | my $name = shift; |
68 | my $fh = gensym; |
69 | open $fh, ">$name" or die "Can't create $name: $!"; |
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70 | *{$fh}->{SCALAR} = $name; |
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71 | binmode $fh; |
72 | $fh; |
73 | } |
74 | |
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75 | sub safer_close { |
76 | my $fh = shift; |
77 | close $fh or die 'Error closing ' . *{$fh}->{SCALAR} . ": $!"; |
78 | } |
79 | |
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80 | 1; |