Chip 2000 May/Chip_2000-05_cd1.bin/zkuste/Perl/ActivePerl-5.6.0.613.msi/䆊䌷䈹䈙䏵-䞅䞆䞀㡆䞃䄦䠥/_dd7833ef2561915512991ad16f7763bb

Text File | 2000-03-15 | 5.2 KB | 152 lines

package File::CheckTree;
require 5.000;
require Exporter;

=head1 NAME

validate - run many filetest checks on a tree

=head1 SYNOPSIS

    use File::CheckTree;

    $warnings += validate( q{
    /vmunix                 -e || die
    /boot                   -e || die
    /bin                    cd
        csh                 -ex
        csh                 !-ug
        sh                  -ex
        sh                  !-ug
    /usr                    -d || warn "What happened to $file?\n"
    });

=head1 DESCRIPTION

The validate() routine takes a single multiline string consisting of
lines containing a filename plus a file test to try on it.  (The
file test may also be a "cd", causing subsequent relative filenames
to be interpreted relative to that directory.)  After the file test
you may put C<|| die> to make it a fatal error if the file test fails.
The default is C<|| warn>.  The file test may optionally have a "!' prepended
to test for the opposite condition.  If you do a cd and then list some
relative filenames, you may want to indent them slightly for readability.
If you supply your own die() or warn() message, you can use $file to
interpolate the filename.

Filetests may be bunched:  "-rwx" tests for all of C<-r>, C<-w>, and C<-x>.
Only the first failed test of the bunch will produce a warning.

The routine returns the number of warnings issued.

=cut

@ISA = qw(Exporter);
@EXPORT = qw(validate);

# $RCSfile: validate.pl,v $$Revision: 4.1 $$Date: 92/08/07 18:24:19 $

# The validate routine takes a single multiline string consisting of
# lines containing a filename plus a file test to try on it.  (The
# file test may also be a 'cd', causing subsequent relative filenames
# to be interpreted relative to that directory.)  After the file test
# you may put '|| die' to make it a fatal error if the file test fails.
# The default is '|| warn'.  The file test may optionally have a ! prepended
# to test for the opposite condition.  If you do a cd and then list some
# relative filenames, you may want to indent them slightly for readability.
# If you supply your own "die" or "warn" message, you can use $file to
# interpolate the filename.

# Filetests may be bunched:  -rwx tests for all of -r, -w and -x.
# Only the first failed test of the bunch will produce a warning.

# The routine returns the number of warnings issued.

# Usage:
#    use File::CheckTree;
#    $warnings += validate('
#    /vmunix            -e || die
#    /boot            -e || die
#    /bin            cd
#        csh            -ex
#        csh            !-ug
#        sh            -ex
#        sh            !-ug
#    /usr            -d || warn "What happened to $file?\n"
#    ');

sub validate {
    local($file,$test,$warnings,$oldwarnings);
    foreach $check (split(/\n/,$_[0])) {
    next if $check =~ /^#/;
    next if $check =~ /^$/;
    ($file,$test) = split(' ',$check,2);
    if ($test =~ s/^(!?-)(\w{2,}\b)/$1Z/) {
        $testlist = $2;
        @testlist = split(//,$testlist);
    }
    else {
        @testlist = ('Z');
    }
    $oldwarnings = $warnings;
    foreach $one (@testlist) {
        $this = $test;
        $this =~ s/(-\w\b)/$1 \$file/g;
        $this =~ s/-Z/-$one/;
        $this .= ' || warn' unless $this =~ /\|\|/;
        $this =~ s/^(.*\S)\s*\|\|\s*(die|warn)$/$1 || valmess('$2','$1')/;
        $this =~ s/\bcd\b/chdir (\$cwd = \$file)/g;
        eval $this;
        last if $warnings > $oldwarnings;
    }
    }
    $warnings;
}

sub valmess {
    local($disposition,$this) = @_;
    $file = $cwd . '/' . $file unless $file =~ m|^/|s;
    if ($this =~ /^(!?)-(\w)\s+\$file\s*$/) {
    $neg = $1;
    $tmp = $2;
    $tmp eq 'r' && ($mess = "$file is not readable by uid $>.");
    $tmp eq 'w' && ($mess = "$file is not writable by uid $>.");
    $tmp eq 'x' && ($mess = "$file is not executable by uid $>.");
    $tmp eq 'o' && ($mess = "$file is not owned by uid $>.");
    $tmp eq 'R' && ($mess = "$file is not readable by you.");
    $tmp eq 'W' && ($mess = "$file is not writable by you.");
    $tmp eq 'X' && ($mess = "$file is not executable by you.");
    $tmp eq 'O' && ($mess = "$file is not owned by you.");
    $tmp eq 'e' && ($mess = "$file does not exist.");
    $tmp eq 'z' && ($mess = "$file does not have zero size.");
    $tmp eq 's' && ($mess = "$file does not have non-zero size.");
    $tmp eq 'f' && ($mess = "$file is not a plain file.");
    $tmp eq 'd' && ($mess = "$file is not a directory.");
    $tmp eq 'l' && ($mess = "$file is not a symbolic link.");
    $tmp eq 'p' && ($mess = "$file is not a named pipe (FIFO).");
    $tmp eq 'S' && ($mess = "$file is not a socket.");
    $tmp eq 'b' && ($mess = "$file is not a block special file.");
    $tmp eq 'c' && ($mess = "$file is not a character special file.");
    $tmp eq 'u' && ($mess = "$file does not have the setuid bit set.");
    $tmp eq 'g' && ($mess = "$file does not have the setgid bit set.");
    $tmp eq 'k' && ($mess = "$file does not have the sticky bit set.");
    $tmp eq 'T' && ($mess = "$file is not a text file.");
    $tmp eq 'B' && ($mess = "$file is not a binary file.");
    if ($neg eq '!') {
        $mess =~ s/ is not / should not be / ||
        $mess =~ s/ does not / should not / ||
        $mess =~ s/ not / /;
    }
    }
    else {
    $this =~ s/\$file/'$file'/g;
    $mess = "Can't do $this.\n";
    }
    die "$mess\n" if $disposition eq 'die';
    warn "$mess\n";
    ++$warnings;
}

1;