diff options
Diffstat (limited to 'lib/PerlIO.pm')
| -rw-r--r-- | lib/PerlIO.pm | 20 |
1 files changed, 9 insertions, 11 deletions
diff --git a/lib/PerlIO.pm b/lib/PerlIO.pm index 2deeea058b..2a7f7e7194 100644 --- a/lib/PerlIO.pm +++ b/lib/PerlIO.pm @@ -233,23 +233,21 @@ The following returns the B<names> of the PerlIO layers on a filehandle. my @layers = PerlIO::get_layers($fh); # Or FH, *FH, "FH". The layers are returned in the order an open() or binmode() call would -use them. Note that the stack begins (normally) from C<stdio> or from -C<perlio>. Under C<stdio> the platform specific low-level I/O (like -C<unix>) is not part of the stack, but under C<perlio> (and the -experimental C<mmap>) it is. +use them. Note that the "default stack" depends on the operating +system and on the perl version. The following table summarizes the default layers on UNIX-like and DOS-like platforms and depending on the setting of the C<$ENV{PERLIO}>: - PERLIO UNIX-like DOS-like + PERLIO UNIX-like DOS-like - none or "" stdio [1] unix crlf - stdio stdio [1] stdio - perlio unix perlio unix perlio - mmap unix mmap unix mmap + unset / "" unix perlio / stdio [1] unix crlf + stdio unix perlio / stdio [1] stdio + perlio unix perlio unix perlio + mmap unix mmap unix mmap - # [1] If Configure found how to do "fast stdio", - # otherwise it will be "unix perlio". + # [1] "stdio" if Configure found out how to do "fast stdio" (depends + # on the stdio implementation) and in Perl 5.8, otherwise "unix perlio" By default the layers from the input side of the filehandle is returned, to get the output side use the optional C<output> argument: |