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Diffstat (limited to 'pod/perlrun.pod')
| -rw-r--r-- | pod/perlrun.pod | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/pod/perlrun.pod b/pod/perlrun.pod index 1e3279e374..a847133bb9 100644 --- a/pod/perlrun.pod +++ b/pod/perlrun.pod @@ -62,6 +62,11 @@ getting a - instead of a complete switch could cause Perl to try to execute standard input instead of your script. And a partial B<-I> switch could also cause odd results. +Some switches do care if they are processed twice, for instance combinations +of B<-l> and B<-0>. Either put all the switches after the 32 character +boundary (if applicable), or replace the use of B<-0>I<digits> by +C<BEGIN{ $/ = "\0digits"; }>. + Parsing of the #! switches starts wherever "perl" is mentioned in the line. The sequences "-*" and "- " are specifically ignored so that you could, if you were so inclined, say @@ -500,7 +505,9 @@ Perl. allows Perl to do unsafe operations. Currently the only "unsafe" operations are the unlinking of directories while running as superuser, and running setuid programs with fatal taint checks turned into -warnings. +warnings. Note that the B<-w> switch (or the C<$^W> variable) must +be used along with this option to actually B<generate> the +taint-check warnings. =item B<-v> |