ap - nmh parser of RFC 822-style addresses
[-help] [-version] [-form formatfile]
[-format string] [-width columns] addrs
is a program that parses addresses according to the ARPA Internet
standard. It also understands many non-standard formats. It is useful for
seeing how nmh
will interpret an address.
program treats each argument as one or more addresses, and prints
those addresses out in the official RFC 822 format. Hence, it is usually best
to enclose each argument in quotes for the shell.
To override the output format used by ap
, the -format
or -format file
switches are used. This permits
individual fields of the address to be extracted with ease. The string is
simply a format string, and the file is simply a format file. See
(5) for the details.
In addition to the standard escapes, ap
also recognizes the following
Escape Returns Description
error string A diagnostic if the parse failed
Here is the default format string used by ap
which says that if an error was detected, print the error, a `:', and the
address in error. Otherwise, output the RFC 822-proper format of the address.
- The user's profile.
- The mts configuration file.
Standard for the Format of ARPA Internet Text Messages
- As described above.
- The width of the terminal.