src/util/mkcdb.pl

   1 #!/usr/bin/perl -wT
   2 #
   3 # Create cdb file from flat alias file. DPC: 15/10/98.
   4 # Args:      source  (may be relative or absolute)
   5 #            target  (may be relative or absolute. Default = source)
   6 # Generates: target.cdb
   7 #            target.tmp
   8 #
   9 # Little Perl script to convert flat file into CDB file. Two advantages over
  10 # cdbmake-12 awk script that is distributed with CDB:
  11 #  1) Handles 'dpc22:dpc22@hermes' as well as 'dpc22 dpc22@hermes'
  12 #  2) Perl works with arbitrary length strings: awk chokes at 1,024 chars
  13 #
  14 # Cambridge: hermes/src/admin/mkcdb,v 1.9 2005/02/15 18:14:12 fanf2 Exp
  15
  16 use strict;
  17
  18 BEGIN { pop @INC if $INC[-1] eq '.' };
  19 $ENV{'PATH'} = "";
  20 umask(022);
  21
  22 my $CDB = '/opt/cdb/bin/cdbmake';
  23
  24 my $prog = $0;
  25 $prog =~ s|(.*/)?([^/]+)|$2|;
  26
  27 my $source;
  28 my $target;
  29 if (@ARGV == 1) {
  30     $source = shift(@ARGV);
  31     $target = $source;
  32 } elsif (@ARGV == 2) {
  33     $source = shift(@ARGV);
  34     $target = shift(@ARGV);
  35 } else {
  36     die("$prog: usage: <source> [<target>]\n");
  37 }
  38 # trust the invoker ?!
  39 $source =~ /(.*)/;
  40 $source = $1;
  41 $target =~ /(.*)/;
  42 $target = $1;
  43
  44 open(SOURCE, "< ${source}")
  45     or die("$prog: open < $source: $!\n");
  46
  47 open(PIPE, "| $CDB $target.cdb $target.tmp")
  48     or die("$prog: open | $CDB $target: $!\n");
  49
  50 sub add_item ($$) {
  51     my $key = shift;
  52     my $val = shift;
  53     printf PIPE ("+%d,%d:%s->%s\n", length($key), length($val), $key, $val);
  54 }
  55
  56 sub add_line ($) {
  57     my $line = shift;
  58     if ($line =~ /^([^\s:]+)\s*:\s*(.*)$/s) {   # key : values
  59         add_item($1,$2);
  60         return;
  61     }
  62     if ($line =~ /^(\S+)\s+(.*)$/s) {       # key: values
  63         add_item($1,$2);
  64         return;
  65     }
  66     if ($line =~ /^(\S+)$/s) {              # key (empty value)
  67         add_item($1,'');
  68         return;
  69     }
  70     warn "$prog: unrecognized item: $line";
  71 }
  72
  73 my $data;
  74 while(<SOURCE>) {
  75     next if /^#/ or /^\s*$/;
  76     m/^(\s*)(\S.*)\s+$/s;
  77     if (length($1) == 0) {
  78             add_line($data) if defined $data;
  79             $data = $2;
  80     } else {
  81             $data .= " $2";
  82     }
  83 }
  84 add_line($data) if defined $data;
  85 print PIPE "\n";
  86
  87 close(SOURCE)
  88     or die("$prog: close < $source: $!\n");
  89 close(PIPE)
  90     or die($! ? "$prog: close | $CDB $target: $!\n"
  91            : "$prog: close | $CDB $target: exited $?\n");
  92
  93 exit 0;