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.\" ========================================================================
.IX Title "File::CheckTree 3"
.TH File::CheckTree 3 "2001-09-21" "perl v5.8.8" "Perl Programmers Reference Guide"
validate \- run many filetest checks on a tree
\& $num_warnings = validate( q{
\& /usr -d || warn "What happened to $file?\en"
The \fIvalidate()\fR routine takes a single multiline string consisting of
directives, each containing a filename plus a file test to try on it.
(The file test may also be a \*(L"cd\*(R", causing subsequent relative filenames
to be interpreted relative to that directory.) After the file test
you may put \f(CW\*(C`|| die\*(C'\fR to make it a fatal error if the file test fails.
The default is \f(CW\*(C`|| warn\*(C'\fR. The file test may optionally have a "!' prepended
to test for the opposite condition. If you do a cd and then list some
relative filenames, you may want to indent them slightly for readability.
If you supply your own \fIdie()\fR or \fIwarn()\fR message, you can use \f(CW$file\fR to
interpolate the filename.
Filetests may be bunched: \*(L"\-rwx\*(R" tests for all of \f(CW\*(C`\-r\*(C'\fR, \f(CW\*(C`\-w\*(C'\fR, and \f(CW\*(C`\-x\*(C'\fR.
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/validate.pl which was
Revised by Paul Grassie <\fIgrassie@perl.com\fR> in 2002.
File::CheckTree used to not display fatal error messages.
It used to count only those warnings produced by a generic \f(CW\*(C`|| warn\*(C'\fR
(and not those in which the user supplied the message). In addition,
the \fIvalidate()\fR routine would leave the user program in whatever
directory was last entered through the use of \*(L"cd\*(R" directives.
These bugs were fixed during the development of perl 5.8.
The first fixed version of File::CheckTree was 4.2.