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authorJacob McDonnell <jacob@jacobmcdonnell.com>2026-04-26 16:38:00 -0400
committerJacob McDonnell <jacob@jacobmcdonnell.com>2026-04-26 16:38:00 -0400
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-.TH JIM 1 "630 MTG"
-.SH NAME
-jim, jim.recover\- 630 MTG text editor
-.SH SYNOPSIS
-.B jim
-[
-.B \-c
-] [ files \&. \&. \&. ]
-.br
-\f3jim.\(**\f1
-[
-.B \-f
-] [
-.B \-t
-] [ files \&. \&. \&. ]
-.SH DESCRIPTION
-.I Jim
-is the text editor for the 630 MTG terminal.
-.P
-It is a shared cached application if the \f3\-c\f1 option is
-specified.
-This means that multiple instances of jim
-may run simultaneously without needing to do a download for
-each instance. Once jim is downloaded it does not have to be
-downloaded again.
-.P
-Jim relies on the mouse to select text and commands;
-it runs only under
-.IR layers (1).
-.IR Jim 's
-screen consists of a number of
-.IR frames ,
-a one-line command and diagnostic frame at the bottom,
-and zero or more larger file frames above it.
-Except where indicated, these frames behave identically.
-One of the frames is always the current frame,
-to which typing and editing commands refer,
-and one of the file frames is the working frame,
-to which file commands such as pattern searching and I/O refer.
-.PP
-A frame has at any time a selected region of text,
-indicated by reverse video highlighting.
-The selected region may be a null string between two characters,
-indicated by a narrow vertical bar between the characters.
-The editor has a single
-.I "save buffer
-containing an arbitrary string.
-The editing commands simply invoke transformations between the
-selected region and the save buffer.
-.PP
-The mouse buttons are used for the most common operations.
-Button 1 is used for selection.
-Clicking button 1 in a frame
-which is not the current frame makes the indicated frame current.
-Clicking button 1 in the current frame selects the null string closest
-to the mouse cursor.
-Making the same null selection twice (`double clicking') selects
-(in decreasing precedence) the bracketed or quoted string, word, or line
-enclosing the selection.
-By depressing and holding button 1, an arbitrary contiguous visible string
-may be selected.
-Button 2 provides a small menu of text manipulation functions, described below.
-Button 3 provides control for inter-frame operations.
-.PP
-The button 2 menu entries are:
-.TP
-.B cut
-Copy the selected text to the save buffer and delete it from the frame.
-If the selected text is null, the save buffer is unaffected.
-.TP
-.B paste
-Replace the selected text by the contents of the save buffer.
-.TP
-.B snarf
-Copy the selected text to the save buffer.
-If the selected text is null, the save buffer is unaffected.
-.bp
-.PP
-Typing
-replaces the selected text with the typed text.
-If the selected text is not null,
-the first character typed forces an implicit
-.BR cut .
-Control characters are discarded, but
-BS (control H),
-ETB (control W),
-NL (control J) and ESC (escape) have special meanings.
-BS is the usual backspace character, which erases the character before the selected text (which is a null string when it takes effect).
-ETB erases back to the word boundary preceding the selected text.
-There is no line kill character.
-NL toggles the current frame between the workframe and the diagnostic
-frame, and can be a substitute for manual frame selection with the
-mouse.
-ESC selects the text typed since the last button hit or ESC.
-If an ESC is typed immediately after a button hit or ESC,
-it is identical to a
-.BR cut .
-ESC followed by
-.B paste
-provides the functionality of a simple undo feature.
-.PP
-The button 3 menu entries are:
-.TP
-.B new
-Create a new frame by sweeping with the mouse.
-.TP
-.B reshape
-Change the shape of the indicated frame.
-The frame is selected by clicking button 3 over the frame.
-.TP
-.B close
-Close the indicated frame and its associated file.
-The file is still available for editing later;
-only the associated frame is shut down.
-.TP
-.B write
-Write the indicated frame's contents to its associated file.
-.PP
-The rest of the menu is a list of file names available for editing.
-To work in a different file, select the file from the menu.
-If the file is not open on the screen, the cursor will switch to an
-outline box to prompt for a rectangle to be swept out with button 3.
-(Clicking button 3 without moving the mouse creates the largest
-possible rectangle.)
-If the file is already open, it will simply be made the workframe and
-current frame (for typing), perhaps after redrawing if it is obscured
-by another frame.
-The format of the lines in the menu is:
-.TP
-\-
-possibly an apostrophe, indicating that the file has been modified since
-last written,
-.TP
-\-
-possibly a period or asterisk, indicating the file is open (asterisk) or
-the workframe (period),
-.TP
-\-
-a blank,
-.TP
-\-
-and the file name.
-The file name may be abbreviated by compacting path components to keep
-the menu manageable, but the last component will always be complete.
-.bp
-.PP
-The work frame has a
-.I "scroll bar
-\(em a black vertical bar down the left edge.
-A small tick in the bar indicates the relative position of the frame
-within the file.
-Pointing to the scroll bar and clicking a button controls scrolling
-operations in the file:
-.TP
-button 1
-Move the line at the top of the screen to the y position of the mouse.
-.TP
-button 2
-Move to the absolute position in the file indicated by the y position of the mouse.
-.TP
-button 3
-Move the line at the y position of the mouse to the top of the screen.
-.PP
-The bottom line frame is used for a few typed commands, modeled on
-.IR ed (1) ,
-which operate on the workframe.
-When a carriage return is typed in the bottom line,
-the line is interpreted as a command.
-The bottom line scrolls, but only
-when the first character of the next line is typed.
-Thus, typically, after some message appears in the bottom line,
-a command need only be typed;
-the contents of the line will be automatically cleared when the first
-character of the command is typed.
-The commands available are:
-.TP
-.B e \f2file\f1\f3
-Edit the named
-.IR file ,
-or use the current file name if none specified.
-Note that each file frame has an associated file name.
-.TP
-.B E \f2file\f1\f3
-Edit the named
-.IR file
-unconditionally, as in \fIed\fP(1).
-.TP
-.B f \f2file\f1\f3
-Set the name of the
-file associated with the work frame, if one is specified,
-and display the result.
-.TP
-.B g \f2files\f1\f3
-Enter the named
-.I files
-into the filename menu, without duplication,
-and set the work frame to one of the named files.
-If the new work frame's file is not open, the user is prompted to create its frame.
-The arguments to
-.IT g
-are passed through
-.IR echo (1)
-for shell metacharacter interpretation.
-.TP
-.B w \f2file\f1\f3
-Write the named
-.IR file ,
-or use the current file name if none specified.
-.TP
-.B q
-Quit the editor.
-.bp
-.TP
-.B Q
-Quit the editor unconditionally, as in \fIed\fP(1).
-.TP
-.B /
-Search forward for the string matching the regular expression after the slash.
-If found, the matching text is selected.
-The regular expressions are exactly as in
-.IR egrep (1),
-with two additions: the character `@' matches any character
-.I including
-newline, and the sequence `\en' specifies a newline, even in character classes.
-The negation of a character class does not match a newline.
-An empty regular expression (slash-newline) repeats the last regular expression.
-.TP
-.B ?
-Search backwards for the expression after the query.
-.TP
-.B 94
-Select the text of line 94, as in
-.IR ed .
-.TP
-.B $
-Select the text of the last line.
-.TP
-.B cd \f2dir\f1\f3
-Set the working directory to \fIdir\fP, as in the shell.
-There is no CDPATH search, but $HOME is the default \fIdir\fP.
-.TP
-.B =
-Display the line number of selection in the current frame.
-.TP
-.B >\f2Unix-command\fP
-Sends the selected text to the standard input of
-.IR Unix-command .
-.TP
-.B <\f2Unix-command\fP
-Replaces the selected text by the standard output of
-.IR Unix-command .
-.TP
-.B |\|\f2Unix-command\fP
-Replaces the selected text by the standard output of
-.IR Unix-command,
-given the original selected text as standard input.
-.PP
-If any of <, > or | is preceded by an asterisk \(**,
-the command is applied to the entire file, instead of just the selected text.
-If the command for < or | exits with non-zero status, the original text
-is not deleted; otherwise, the new text is selected.
-Finally, the standard error output of the command, which is merged with the
-standard output for >, is saved in the file
-$HOME/jim.err .
-If the file is non-empty when the command completes, the first line is
-displayed in the diagnostic frame. Therefore the command ``>pwd''
-will report
-.IR jim 's
-current directory.
-.PP
-The most recent search command ('/' or '?') and Unix command ('<', '|',
-or '>') are added to the button 2 menu, so that they may be easily repeated.
-.PP
-Attempts to quit with modified files, or edit a new file
-in a modified frame, are rejected.
-A second `q' or `e' command will succeed.
-The `Q' or `E' commands ignore modifications and work immediately.
-Some consistency checks are performed for the `w' command.
-.I jim
-will reject write requests which it considers dangerous
-(such as writes that change files which are modified when
-read into memory).
-A second `w' will always write the file.
-.bp
-.PP
-If
-.I jim
-receives a hang-up signal, it writes a recover file,
-which is a shell command file that, when executed, will
-retrieve files that were being edited and had been modified.
-The name of the file will be of the form \f2jim.\f1 followed
-by a uniquely generated alphanumeric string. \f2Jim\f1 will
-send mail to the logon id saying files may be recovered and
-specifying the path and name of the recover file. If it cannot
-write this file in the home directory, it writes it in the
-current working directory. The \f3-t\f1 option prints a table
-of contents. By default, the jim recover file is interactive;
-the \f3-f\f1 option suppresses the interaction.
-If no \f2file\f1 argument is given to the jim.recover shell
-file, the recovery will apply to all modified files at the
-time when jim received the hang-up signal. If there is a
-\f2file\f1 argument, only those files will be recovered.
-.SH FILES
-.ta \w'$DMD/lib/jim.m 'u
-$DMD/lib/jim.m terminal support program
-.br
-/tmp/jim.\(** temporary file
-.br
-$HOME/jim.err diagnostic output from Unix commands
-.br
-jim.\(** recovery script created upon \fIjim\fP failure
-.SH SEE ALSO
-ucache(1).
-.br
-ed(1), echo(1), egrep(1) in the \f2UNIX System V
-User's Reference Manual\f1.
-.br
-layers(1) in the \f2Unix System V Release 3 User's Reference Manual\f1.
-.br
-layers(1) in the \f25620 Dot-Mapped Display Reference Manual.\f1
-.SH WARNING
-\f2Jim\f1 is reshapable, but a reshape clears the screen
-space of all open frames.
-.SH BUGS
-\" spectacular is the real word...
-The regular expression matcher is non-deterministic (unlike
-.IR egrep ),
-and may be slow for
-complicated expressions.
-.P
-The < and | operators don't snarf the original text.