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dl_expandspec.al
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1995-07-02
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# NOTE: Derived from lib/DynaLoader.pm. Changes made here will be lost.
package DynaLoader;
sub dl_expandspec{
my($spec) = @_;
# Optional function invoked if DynaLoader.pm sets $do_expand.
# Most systems do not require or use this function.
# Some systems may implement it in the dl_*.xs file in which case
# this autoload version will not be called but is harmless.
# This function is designed to deal with systems which treat some
# 'filenames' in a special way. For example VMS 'Logical Names'
# (something like unix environment variables - but different).
# This function should recognise such names and expand them into
# full file paths.
# Must return undef if $spec is invalid or file does not exist.
my($file) = $spec; # default output to input
my($osname) = $Config{'osname'};
if ($osname eq 'VMS'){ # dl_expandspec should be defined in dl_vms.xs
croak "dl_expandspec: should be defined in XS file!\n";
}else{
return undef unless -f $file;
}
print STDERR "dl_expandspec($spec) => $file\n" if $dl_debug;
$file;
}
1;