diff options
Diffstat (limited to 'pod')
| -rw-r--r-- | pod/perlvar.pod | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/pod/perlvar.pod b/pod/perlvar.pod index 09b83bee50..4812f0d9c6 100644 --- a/pod/perlvar.pod +++ b/pod/perlvar.pod @@ -1905,8 +1905,9 @@ corresponding to C<errno>. Many system or library calls set C<errno> if they fail, to indicate the cause of failure. They usually do B<not> -set C<errno> to zero if they succeed. This means C<errno>, -hence C<$!>, is meaningful only I<immediately> after a B<failure>: +set C<errno> to zero if they succeed and may set C<errno> to a +non-zero value on success. This means C<errno>, hence C<$!>, is +meaningful only I<immediately> after a B<failure>: if (open my $fh, "<", $filename) { # Here $! is meaningless. |