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 arbitary 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 $ENV{'PATH'} = "";
  19 umask(022);
  20
  21 my $CDB = '/opt/cdb/bin/cdbmake';
  22
  23 my $prog = $0;
  24 $prog =~ s|(.*/)?([^/]+)|$2|;
  25
  26 my $source;
  27 my $target;
  28 if (@ARGV == 1) {
  29     $source = shift(@ARGV);
  30     $target = $source;
  31 } elsif (@ARGV == 2) {
  32     $source = shift(@ARGV);
  33     $target = shift(@ARGV);
  34 } else {
  35     die("$prog: usage: <source> [<target>]\n");
  36 }
  37 # trust the invoker ?!
  38 $source =~ /(.*)/;
  39 $source = $1;
  40 $target =~ /(.*)/;
  41 $target = $1;
  42
  43 open(SOURCE, "< ${source}")
  44     or die("$prog: open < $source: $!\n");
  45
  46 open(PIPE, "| $CDB $target.cdb $target.tmp")
  47     or die("$prog: open | $CDB $target: $!\n");
  48
  49 sub add_item ($$) {
  50     my $key = shift;
  51     my $val = shift;
  52     printf PIPE ("+%d,%d:%s->%s\n", length($key), length($val), $key, $val);
  53 }
  54
  55 sub add_line ($) {
  56     my $line = shift;
  57     if ($line =~ /^([^\s:]+)\s*:\s*(.*)$/s) {   # key : values
  58         add_item($1,$2);
  59         return;
  60     }
  61     if ($line =~ /^(\S+)\s+(.*)$/s) {       # key: values
  62         add_item($1,$2);
  63         return;
  64     }
  65     if ($line =~ /^(\S+)$/s) {              # key (empty value)
  66         add_item($1,'');
  67         return;
  68     }
  69     warn "$prog: unrecognized item: $line";
  70 }
  71
  72 my $data;
  73 while(<SOURCE>) {
  74     next if /^#/ or /^\s*$/;
  75     m/^(\s*)(\S.*)\s+$/s;
  76     if (length($1) == 0) {
  77             add_line($data) if defined $data;
  78             $data = $2;
  79     } else {
  80             $data .= " $2";
  81     }
  82 }
  83 add_line($data) if defined $data;
  84 print PIPE "\n";
  85
  86 close(SOURCE)
  87     or die("$prog: close < $source: $!\n");
  88 close(PIPE)
  89     or die($! ? "$prog: close | $CDB $target: $!\n"
  90            : "$prog: close | $CDB $target: exited $?\n");
  91
  92 exit 0;