lib/perl5/5.6.1/validate.pl

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