=over =item semop KEY,OPSTRING X<semop> Calls the System V IPC function L<semop(2)> for semaphore operations such as signalling and waiting. OPSTRING must be a packed array of semop structures. Eac...

=over =item socket SOCKET,DOMAIN,TYPE,PROTOCOL X<socket> Opens a socket of the specified kind and attaches it to filehandle SOCKET. DOMAIN, TYPE, and PROTOCOL are specified the same as for the sysc...

=over =item elseif The "else if" keyword is spelled C<elsif> in Perl. There's no C<elif> or C<else if> either. It does parse C<elseif>, but only to warn you about not using it. See the documentatio...

=over =item else =item elsif =item for =item foreach =item if =item unless =item until =item while These flow-control keywords are documented in L<perlsyn/"Compound Statements">. =back

=over =item BEGIN =item CHECK =item END =item INIT =item UNITCHECK These compile phase keywords are documented in L<perlmod/"BEGIN, UNITCHECK, CHECK, INIT and END">. =back

=over =item ADJUST This class-related phaser block is documented in L<perlclass>. =back

=over =item getpwnam NAME X<getpwnam> X<getgrnam> X<gethostbyname> X<getnetbyname> X<getprotobyname> X<getpwuid> X<getgrgid> X<getservbyname> X<gethostbyaddr> X<getnetbyaddr> X<getprotobynumber> X<...

=over =item shmread ID,VAR,POS,SIZE X<shmread> X<shmwrite> =item shmwrite ID,STRING,POS,SIZE Reads or writes the System V shared memory segment ID starting at position POS for size SIZE by attachin...

=over =item shmget KEY,SIZE,FLAGS X<shmget> Calls the System V IPC function shmget. Returns the shared memory segment id, or L<C<undef>|/undef EXPR> on error. See also L<perlipc/"SysV IPC"> and the...

=over =item and =item cmp =item eq =item ge =item gt =item isa =item le =item lt =item ne =item not =item or =item x =item xor These operators are documented in L<perlop>. =back