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Diffstat (limited to 'pod/perlvar.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 ccc4196bfa..890909d526 100644 --- a/pod/perlvar.pod +++ b/pod/perlvar.pod @@ -185,8 +185,9 @@ Mnemonic: works in double-quoted context. =item $$ X<$$> X<$PID> X<$PROCESS_ID> -The process number of the Perl running this script. You should -consider this variable read-only, although it will be altered +The process number of the Perl running this script. Though you I<can> set +this variable, doing so is generally discouraged, although it can be +invaluable for some testing purposes. It will be reset automatically across C<fork()> calls. Note for Linux users: on Linux, the C functions C<getpid()> and |