lib/perl5/5.6.1/File/CheckTree.pm

   1 package File::CheckTree;
   2 require 5.000;
   3 require Exporter;
   4
   5 =head1 NAME
   6
   7 validate - run many filetest checks on a tree
   8
   9 =head1 SYNOPSIS
  10
  11     use File::CheckTree;
  12
  13     $warnings += validate( q{
  14         /vmunix                 -e || die
  15         /boot                   -e || die
  16         /bin                    cd
  17             csh                 -ex
  18             csh                 !-ug
  19             sh                  -ex
  20             sh                  !-ug
  21         /usr                    -d || warn "What happened to $file?\n"
  22     });
  23
  24 =head1 DESCRIPTION
  25
  26 The validate() routine takes a single multiline string consisting of
  27 lines containing a filename plus a file test to try on it.  (The
  28 file test may also be a "cd", causing subsequent relative filenames
  29 to be interpreted relative to that directory.)  After the file test
  30 you may put C<|| die> to make it a fatal error if the file test fails.
  31 The default is C<|| warn>.  The file test may optionally have a "!' prepended
  32 to test for the opposite condition.  If you do a cd and then list some
  33 relative filenames, you may want to indent them slightly for readability.
  34 If you supply your own die() or warn() message, you can use $file to
  35 interpolate the filename.
  36
  37 Filetests may be bunched:  "-rwx" tests for all of C<-r>, C<-w>, and C<-x>.
  38 Only the first failed test of the bunch will produce a warning.
  39
  40 The routine returns the number of warnings issued.
  41
  42 =cut
  43
  44 @ISA = qw(Exporter);
  45 @EXPORT = qw(validate);
  46
  47 # $RCSfile: validate.pl,v $$Revision: 4.1 $$Date: 92/08/07 18:24:19 $
  48
  49 # The validate routine takes a single multiline string consisting of
  50 # lines containing a filename plus a file test to try on it.  (The
  51 # file test may also be a 'cd', causing subsequent relative filenames
  52 # to be interpreted relative to that directory.)  After the file test
  53 # you may put '|| die' to make it a fatal error if the file test fails.
  54 # The default is '|| warn'.  The file test may optionally have a ! prepended
  55 # to test for the opposite condition.  If you do a cd and then list some
  56 # relative filenames, you may want to indent them slightly for readability.
  57 # If you supply your own "die" or "warn" message, you can use $file to
  58 # interpolate the filename.
  59
  60 # Filetests may be bunched:  -rwx tests for all of -r, -w and -x.
  61 # Only the first failed test of the bunch will produce a warning.
  62
  63 # The routine returns the number of warnings issued.
  64
  65 # Usage:
  66 #       use File::CheckTree;
  67 #       $warnings += validate('
  68 #       /vmunix                 -e || die
  69 #       /boot                   -e || die
  70 #       /bin                    cd
  71 #           csh                 -ex
  72 #           csh                 !-ug
  73 #           sh                  -ex
  74 #           sh                  !-ug
  75 #       /usr                    -d || warn "What happened to $file?\n"
  76 #       ');
  77
  78 sub validate {
  79     local($file,$test,$warnings,$oldwarnings);
  80     foreach $check (split(/\n/,$_[0])) {
  81         next if $check =~ /^#/;
  82         next if $check =~ /^$/;
  83         ($file,$test) = split(' ',$check,2);
  84         if ($test =~ s/^(!?-)(\w{2,}\b)/$1Z/) {
  85             $testlist = $2;
  86             @testlist = split(//,$testlist);
  87         }
  88         else {
  89             @testlist = ('Z');
  90         }
  91         $oldwarnings = $warnings;
  92         foreach $one (@testlist) {
  93             $this = $test;
  94             $this =~ s/(-\w\b)/$1 \$file/g;
  95             $this =~ s/-Z/-$one/;
  96             $this .= ' || warn' unless $this =~ /\|\|/;
  97             $this =~ s/^(.*\S)\s*\|\|\s*(die|warn)$/$1 || valmess('$2','$1')/;
  98             $this =~ s/\bcd\b/chdir (\$cwd = \$file)/g;
  99             eval $this;
 100             last if $warnings > $oldwarnings;
 101         }
 102     }
 103     $warnings;
 104 }
 105
 106 sub valmess {
 107     local($disposition,$this) = @_;
 108     $file = $cwd . '/' . $file unless $file =~ m|^/|s;
 109     if ($this =~ /^(!?)-(\w)\s+\$file\s*$/) {
 110         $neg = $1;
 111         $tmp = $2;
 112         $tmp eq 'r' && ($mess = "$file is not readable by uid $>.");
 113         $tmp eq 'w' && ($mess = "$file is not writable by uid $>.");
 114         $tmp eq 'x' && ($mess = "$file is not executable by uid $>.");
 115         $tmp eq 'o' && ($mess = "$file is not owned by uid $>.");
 116         $tmp eq 'R' && ($mess = "$file is not readable by you.");
 117         $tmp eq 'W' && ($mess = "$file is not writable by you.");
 118         $tmp eq 'X' && ($mess = "$file is not executable by you.");
 119         $tmp eq 'O' && ($mess = "$file is not owned by you.");
 120         $tmp eq 'e' && ($mess = "$file does not exist.");
 121         $tmp eq 'z' && ($mess = "$file does not have zero size.");
 122         $tmp eq 's' && ($mess = "$file does not have non-zero size.");
 123         $tmp eq 'f' && ($mess = "$file is not a plain file.");
 124         $tmp eq 'd' && ($mess = "$file is not a directory.");
 125         $tmp eq 'l' && ($mess = "$file is not a symbolic link.");
 126         $tmp eq 'p' && ($mess = "$file is not a named pipe (FIFO).");
 127         $tmp eq 'S' && ($mess = "$file is not a socket.");
 128         $tmp eq 'b' && ($mess = "$file is not a block special file.");
 129         $tmp eq 'c' && ($mess = "$file is not a character special file.");
 130         $tmp eq 'u' && ($mess = "$file does not have the setuid bit set.");
 131         $tmp eq 'g' && ($mess = "$file does not have the setgid bit set.");
 132         $tmp eq 'k' && ($mess = "$file does not have the sticky bit set.");
 133         $tmp eq 'T' && ($mess = "$file is not a text file.");
 134         $tmp eq 'B' && ($mess = "$file is not a binary file.");
 135         if ($neg eq '!') {
 136             $mess =~ s/ is not / should not be / ||
 137             $mess =~ s/ does not / should not / ||
 138             $mess =~ s/ not / /;
 139         }
 140     }
 141     else {
 142         $this =~ s/\$file/'$file'/g;
 143         $mess = "Can't do $this.\n";
 144     }
 145     die "$mess\n" if $disposition eq 'die';
 146     warn "$mess\n";
 147     ++$warnings;
 148 }
 149
 150 1;
 151