diff options
Diffstat (limited to 'pod/perliol.pod')
| -rw-r--r-- | pod/perliol.pod | 21 |
1 files changed, 12 insertions, 9 deletions
diff --git a/pod/perliol.pod b/pod/perliol.pod index 5a9dda5d66..94c0e98f8c 100644 --- a/pod/perliol.pod +++ b/pod/perliol.pod @@ -686,29 +686,27 @@ you can either replace with the "blank" methods (which do nothing, and return zero and -1, respectively) or for certain methods you may assume a default behaviour by using a NULL -method. The default behaviour is either to use the corresponding -PerlIOBase method, or silently return success (return zero), or to -fail (set errno and return -1 or NULL). The following table -summarizes the behaviour: +method. The Open method looks for help in the 'parent' layer. +The following table summarizes the behaviour: method behaviour with NULL Clearerr PerlIOBase_clearerr Close PerlIOBase_close - Dup FAILURE + Dup PerlIOBase_dup Eof PerlIOBase_eof Error PerlIOBase_error Fileno PerlIOBase_fileno Fill FAILURE Flush SUCCESS - Getarg FAILURE + Getarg SUCCESS Get_base FAILURE Get_bufsiz FAILURE Get_cnt FAILURE Get_ptr FAILURE - Open FAILURE - Popped SUCCESS - Pushed SUCCESS + Open INHERITED + Popped SUCCESS + Pushed SUCCESS Read PerlIOBase_read Seek FAILURE Set_cnt FAILURE @@ -718,6 +716,11 @@ summarizes the behaviour: Unread PerlIOBase_unread Write FAILURE + FAILURE Set errno (to EINVAL in UNIXish, to LIB$_INVARG in VMS) and + return -1 (for numeric return values) or NULL (for pointers) + INHERITED Inherited from the layer below + SUCCESS Return 0 (for numeric return values) or a pointer + =head2 Core Layers The file C<perlio.c> provides the following layers: |