diff options
Diffstat (limited to 'vms/perlvms.pod')
| -rw-r--r-- | vms/perlvms.pod | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/vms/perlvms.pod b/vms/perlvms.pod index 17e83e5c1b..25058bc902 100644 --- a/vms/perlvms.pod +++ b/vms/perlvms.pod @@ -788,6 +788,12 @@ by saying (You can't just say C<$ENV{$key} = $ENV{$key}>, since the Perl optimizer is smart enough to elide the expression.) +Don't try to clear C<%ENV> by saying C<%ENV = ();> Bad things will +happen because parts of C<%ENV> are per-process, parts of it are +per-group, and parts of it are system-wide. Without some serious +rights, it won't work, or with the rights, it does, but the system +will effectively die. + At present, the first time you iterate over %ENV using C<keys>, or C<values>, you will incur a time penalty as all logical names are read, in order to fully populate %ENV. |