show - show (list) messages (only available within the message handling system, mh)
show [+folder] [msgs] [-draft] [-[no]header] [-help] [-showproc program] [-noshowproc] [options to showproc]
Displays the draft message, or the current message in your +drafts folder, if you have one set up. You cannot give a msgs argument when you use this option. Displays a one-line header before the message. The header consists of the name of the folder and the message number. This is the default behavior. It can be suppressed with the -noheader option. Prints a list of the valid options to this command. Specifies an alternative program to list messages. The default is to use the program defined by the showproc: entry in the .mh_profile file. You can give options to the showproc program at the command line. These are passed directly to showproc by show.
The defaults for this command are as follows:
+folder defaults to the current folder msgs defaults to the current message -header
Use show to display the contents of the current message. You can specify alternative messages or folders by using the +folder or msgs arguments.
If a folder is given, it becomes the current folder. The last message shown becomes the current message.
You can specify a number of messages or a range of messages using the msgs argument. If you specify more than one message, show prompts for a <RETURN> prior to listing each message.
Typically, the messages are listed exactly as they are, with no reformatting. A program named by the showproc component in the .mh_profile file is invoked to do the listing, and any options not recognized by show are passed along to that program. The default program is more(1).
By default, the show command use the more program to list each message, a page at a time. When the end of the page is reached, it waits for a <RETURN> or a space. If you press <RETURN>, show prints the next line. If you press the space bar, it prints the next screen of data. At the end of the message, show automatically returns you to the system prompt. Press q to quit before the end of the message.
If the profile entry
and non-empty, then
will remove each of the messages
shown from the sequences named by the profile entry.
The -header option does not work when msgs expands to more than one message. If the showproc is mhl, then this problem can be circumvented by referencing the messagename field in the mhl format file.
The command show updates your mail environment before showing the message. Hence show may mark messages as seen before you actually see them. However, this is generally not a problem, unless you are using the unseen messages mechanism, and you interrupt show while it is showing unseen messages.
If your showproc is mhl, then show uses a built-in mhl: it does not actually run the mhl program. Hence, if you define your own showproc, do not call it mhl since show will not run it.
If more(1) is your showproc (which is the default), then avoid running show in the background with only its standard output piped to another process. You should re-direct the diagnostic output of show as well
For example, in the following incorrect example, show will go into a tty input state: % show | print &
For users of csh, the correct command is: % show |& print &
For users of sh, the correct command is: % show 2>&1 | print &
Path: To determine the user's Mail directory
Unseen-Sequence: To name sequences denoting unseen messages
showproc: Program to show messages
In the first example, show displays the contents of message 36 in the current folder: % show 36 In the next example, the pr(1) program is used to list the current message: % show -showproc pr
The user profile.
more(1), mhl(1), next(1), pick(1), prev(1), scan(1)