04-28-2008
reborg wrote about eras usage of "ls -1":
Quote:
Originally Posted by
reborg
The -1 option serves no purpose here.
This is a common misunderstanding about "ls". Because "ls" output has several columns when displayed on a screen one would assume that the same is the case when the output goes into a pipe. In fact "ls" determines if its output goes to a terminal or not and formats its output in columns or not. This can easily be demonstrated by issuing "ls > /some/file ; cat /some/file", which will show the same output as "ls -1" (to the screen), whereas "ls" (to the screen) will look different.
(source: the AIX manpage of ls tells about this rather counter-intuitive behavior of ls)
bakunin
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ap(8) System Manager's Manual ap(8)
NAME
ap - Parses addresses RFC 822-style
SYNOPSIS
/usr/lib/mh/ap [-form file] [-format string] [-help] [-[no]normalize] [-width columns] addrs...
OPTIONS
Overrides the default output format of ap. The output is formatted according to the instructions in the specified file. This must be a
format file; see mh-format(4). Overrides the default output format of ap. The output is formatted according to the instructions in the
specified string. This must be a format string; see mh-format(4).
The argument to the -format option must be interpreted as a single token by the shell that invokes ap. Therefore, you should usually
place the argument to this option inside double quotes ("). Prints a list of the valid options to this command. The -normalize
option tells ap to try to find the official host name of the address. This is the default behavior, which can be suppressed using
the -nonormalize option. Specifies the width of the screen in columns.
DESCRIPTION
The ap program parses addresses according to the ARPA Internet standard. It also understands many nonstandard formats. It is useful for
seeing how MH will interpret an address.
The ap program treats each argument as one or more addresses, and prints those addresses in the official RFC 822 format. Hence, it is usu-
ally best to enclose each argument in double quotes (") for the shell.
In addition to the standard escapes, ap also recognizes the additional escape error, which is a diagnostic that is returned if the parsing
operation failed.
The default settings for the ap command are -normalize and -width columns, where columns is equal to the the width of the terminal.
RESTRICTIONS
On systems where MH is configured with the BERK option, address parsing is not enabled.
EXAMPLES
This is the default format string used by ap:
%<{error}%{error}: %{text}%|%(proper{text})%>
If an error was detected, the preceding string instructs ap to print the error, a colon (:), and the address that is in error. Otherwise,
the ap command output is the proper RFC 822 format of the address.
FILES
User profile. System customization file.
SEE ALSO
Commands: dp(8)
Files: mh-format(4)
Standard for the Format of ARPA Internet Text Messages (RFC 822)
ap(8)