Document pseudo-commands.

[ I<command_opts> ]

[ I<command_args> ]

B<openssl> [ B<list-standard-commands> | B<list-message-digest-commands> | B<list-cipher-commands> ]

B<openssl> B<no->I<XXX> [ I<arbitrary options> ]

=head1 DESCRIPTION

OpenSSL is a cryptography toolkit implementing the Secure Sockets Layer (SSL

SYNOPSIS above), each of which often has a wealth of options and arguments

(I<command_opts> and I<command_args> in the SYNOPSIS).

The pseudo-commands B<list-standard-commands>, B<list-message-digest-commands>,

and B<list-cipher-commands> output a list (one entry per line) of the names

of all standard commands, message digest commands, or cipher commands,

respectively, that are available in the present B<openssl> utility.

The pseudo-command B<no->I<XXX> tests whether a command of the

specified name is available.  If no command named I<XXX> exists, it

returns 0 (success) and prints B<no->I<XXX>; otherwise it returns 1

and prints I<XXX>.  In both cases, the output goes to B<stdout> and

nothing is printed to B<stderr>.  Additional command line arguments

are always ignored.  Since for each cipher there is a command of the

same name, this provides an easy way for shell scripts to test for the

availability of ciphers in the B<openssl> program.  (B<no->I<XXX> is

not able to detect pseudo-commands such as B<quit>,

B<list->I<...>B<-commands>, or B<no->I<XXX> itself.)

=head2 STANDARD COMMANDS

=over 10

=head1 HISTORY

The openssl(1) document appeared in OpenSSL 0.9.2

The openssl(1) document appeared in OpenSSL 0.9.2.

The B<list->I<XXX>B<-commands> pseudo-commands were added in OpenSSL 0.9.3;

the B<no->I<XXX> pseudo-commands were added in OpenSSL 0.9.5a.

For notes on the availability of other commands, see their individual

manual pages.

=cut