=head2 How can I make my Perl program run faster?
The best way to do this is to come up with a better algorithm. This
-can often make a dramatic difference. Chapter 8 in the Camel has some
-efficiency tips in it you might want to look at. Jon Bentley's book
+can often make a dramatic difference. Jon Bentley's book
``Programming Pearls'' (that's not a misspelling!) has some good tips
on optimization, too. Advice on benchmarking boils down to: benchmark
and profile to make sure you're optimizing the right part, look for
There's an example of this in L<perlfunc/crypt>). First, you put the
terminal into "no echo" mode, then just read the password normally.
You may do this with an old-style ioctl() function, POSIX terminal
-control (see L<POSIX> and Chapter 7 of the Camel, 2nd ed.), or a call
+control (see L<POSIX> or its documentation the Camel Book), or a call
to the B<stty> program, with varying degrees of portability.
You can also do this for most systems using the Term::ReadKey module
You don't actually "trap" a control character. Instead, that character
generates a signal which is sent to your terminal's currently
foregrounded process group, which you then trap in your process.
-Signals are documented in L<perlipc/"Signals"> and chapter 6 of the Camel.
+Signals are documented in L<perlipc/"Signals"> and the
+section on ``Signals'' in the Camel.
Be warned that very few C libraries are re-entrant. Therefore, if you
attempt to print() in a handler that got invoked during another stdio
you're in a "slow" call, such as <FH>, read(), connect(), or
wait(), that the only way to terminate them is by "longjumping" out;
that is, by raising an exception. See the time-out handler for a
-blocking flock() in L<perlipc/"Signals"> or chapter 6 of the Camel, 2nd ed.
+blocking flock() in L<perlipc/"Signals"> or the section on ``Signals''
+in the Camel book.
=head2 How do I modify the shadow password file on a Unix system?
Perl's exception-handling mechanism is its eval() operator. You can
use eval() as setjmp and die() as longjmp. For details of this, see
the section on signals, especially the time-out handler for a blocking
-flock() in L<perlipc/"Signals"> and chapter 6 of the Camel 2nd ed.
+flock() in L<perlipc/"Signals"> or the section on ``Signals'' in
+the Camel Book.
If exception handling is all you're interested in, try the
exceptions.pl library (part of the standard perl distribution).
=head2 How do I timeout a slow event?
Use the alarm() function, probably in conjunction with a signal
-handler, as documented in L<perlipc/"Signals"> and chapter 6 of the
-Camel. You may instead use the more flexible Sys::AlarmCall module
-available from CPAN.
+handler, as documented in L<perlipc/"Signals"> and the section on
+``Signals'' in the Camel. You may instead use the more flexible
+Sys::AlarmCall module available from CPAN.
=head2 How do I set CPU limits?