Section: Perl Programmers Reference Guide (3pm)
Updated: 2001-09-21
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validate - run many filetest checks on a tree  


    use File::CheckTree;

    $num_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"



The validate() routine takes a single multiline string consisting of directives, each 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.  


File::CheckTree was derived from lib/ which was written by Larry Wall. Revised by Paul Grassie <> in 2002.  


File::CheckTree used to not display fatal error messages. It used to count only those warnings produced by a generic "|| warn" (and not those in which the user supplied the message). In addition, the validate() routine would leave the user program in whatever directory was last entered through the use of ``cd'' directives. These bugs were fixed during the development of perl 5.8. The first fixed version of File::CheckTree was 4.2.



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