diff options
Diffstat (limited to 'pod/perlrun.pod')
| -rw-r--r-- | pod/perlrun.pod | 19 |
1 files changed, 16 insertions, 3 deletions
diff --git a/pod/perlrun.pod b/pod/perlrun.pod index 514a399537..b9adb9b5a0 100644 --- a/pod/perlrun.pod +++ b/pod/perlrun.pod @@ -277,10 +277,10 @@ are as follows; listing the letters is equal to summing the numbers. O 2 STDOUT will be in UTF-8 E 4 STDERR will be in UTF-8 S 7 I + O + E - i 8 the default input layer expects UTF-8 - o 16 the default output layer enforces UTF-8 + i 8 UTF-8 is the default PerlIO layer for input streams + o 16 UTF-8 is the default PerlIO layer for output streams D 24 i + o - A 32 the @ARGV elements are supposed to be in UTF-8 + A 32 the @ARGV elements are expected to be strings encoded in UTF-8 L 64 normally the "IOEioA" are unconditional, the L makes them conditional on the locale environment variables (the LC_ALL, LC_TYPE, and LANG, in the order @@ -291,6 +291,13 @@ For example, C<-COE> and C<-C6> will both turn on UTF-8-ness on both STDOUT and STDERR. Repeating letters is just redundant, not cumulative nor toggling. +The C<io> options mean that any subsequent open() (or similar I/O +operations) will have the C<:utf8> PerlIO layer implicitly applied +to them, in other words, UTF-8 is expected from any input stream, +and UTF-8 is produced to any output stream. This is just the default, +with explicit layers in open() and with binmode() one can manipulate +streams as usual. + C<-C> on its own (not followed by any number or option list), or the empty string C<""> for the C<$ENV{PERL_UNICODE}, has the same effect as <-CSDL>. In other words, the standard I/O handles and the default @@ -1084,6 +1091,12 @@ affect perl on VMS include PERLSHR, PERL_ENV_TABLES, and SYS$TIMEZONE_DIFFERENTIAL but are optional and discussed further in L<perlvms> and in F<README.vms> in the Perl source distribution. +=item PERL_SIGNALS + +In Perls 5.8.1 and later. If set to C<unsafe> the pre-Perl-5.8.0 +signals behaviour (immediate but unsafe) is restored. If set to +C<safe> the safe signals are used. + =item PERL_UNICODE Equivalent to the B<-C> command-line switch. |