Commit | Line | Data |
---|---|---|
9ad884cb JH |
1 | #!/usr/bin/perl -w |
2 | use strict; | |
523b3031 NC |
3 | use vars qw($Is_W32 $Is_OS2 $Is_Cygwin $Is_NetWare $Needs_Write $Verbose |
4 | @Changed); | |
9ad884cb | 5 | use Config; # Remember, this is running using an existing perl |
424a4936 NC |
6 | use File::Compare; |
7 | use Symbol; | |
9ad884cb JH |
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 | ||
523b3031 NC |
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 | } | |
95aa0565 | 28 | |
9ad884cb JH |
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, $to; | |
50 | } | |
51 | ||
424a4936 | 52 | sub rename_if_different { |
9ad884cb | 53 | my ($from, $to) = @_; |
b6b9a099 | 54 | |
424a4936 | 55 | if (compare($from, $to) == 0) { |
523b3031 | 56 | warn "no changes between '$from' & '$to'\n" if $Verbose > 0; |
b6b9a099 JC |
57 | safer_unlink($from); |
58 | return; | |
59 | } | |
523b3031 NC |
60 | warn "changed '$from' to '$to'\n" if $Verbose > 0; |
61 | push @Changed, $to unless $Verbose < 0; | |
9ad884cb JH |
62 | safer_rename_silent($from, $to) or die "renaming $from to $to: $!"; |
63 | } | |
424a4936 NC |
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: $!"; | |
08858ed2 | 70 | *{$fh}->{SCALAR} = $name; |
424a4936 NC |
71 | binmode $fh; |
72 | $fh; | |
73 | } | |
74 | ||
08858ed2 NC |
75 | sub safer_close { |
76 | my $fh = shift; | |
77 | close $fh or die 'Error closing ' . *{$fh}->{SCALAR} . ": $!"; | |
78 | } | |
79 | ||
9ad884cb | 80 | 1; |