diff options
Diffstat (limited to 'usr.bin')
| -rw-r--r-- | usr.bin/mg/mg.1 | 123 |
1 files changed, 64 insertions, 59 deletions
diff --git a/usr.bin/mg/mg.1 b/usr.bin/mg/mg.1 index bdd1bd99828..94ea6d9338a 100644 --- a/usr.bin/mg/mg.1 +++ b/usr.bin/mg/mg.1 @@ -1,6 +1,6 @@ -.\" $OpenBSD: mg.1,v 1.32 2007/05/31 19:20:13 jmc Exp $ +.\" $OpenBSD: mg.1,v 1.33 2008/01/10 20:12:45 kjell Exp $ .\" -.Dd $Mdocdate: May 31 2007 $ +.Dd $Mdocdate: January 10 2008 $ .Dt MG 1 .Os .Sh NAME @@ -13,7 +13,7 @@ .Sh DESCRIPTION .Nm is intended to be a small, fast, and portable editor for -people who can't (or don't want to) run the real emacs for one +people who can't (or don't want to) run emacs for one reason or another, or are not familiar with the .Xr vi 1 editor. @@ -25,7 +25,9 @@ The options are as follows: .Bl -tag -width Ds .It Ar +number Go to the line specified by number (do not insert -a space between the "+" sign and the number). +a space between the +.Sq + +sign and the number). If a negative number is specified, the line number counts backwards from the end of the file i.e. +-1 will be the last line of the file, +-2 will be second last, and so on. @@ -36,7 +38,33 @@ scratch buffer and all files. .It Fl n Turn off backup file generation. .El -.Sh KEY BINDINGS +.Sh WINDOWS AND BUFFERS +When a file is loaded into +.Nm , +it is stored in a +.Em buffer . +This buffer may be displayed on the screen in more than one window. +At present, windows may only be split horizontally, so each window is +delineated by a modeline at the bottom. +If changes are made to a buffer, it will be reflected in all open windows. +.Sh POINT AND MARK +The current cursor location in +.Nm +is called the +.Em point . +It is possible to define a window-specific region of text by setting a second +location, called the +.Em mark . +The +.Em region +is the text between point and mark inclusive. +Deleting the character at the mark position leaves +the mark at the point of deletion. +.Pp +Note: The point and mark are window-specific in +.Nm , +not buffer-specific, as in other emacs flavours. +.Sh DEFAULT KEY BINDINGS Normal editing commands are very similar to Gnu Emacs. In the following examples, ^X means control-X, and M-X means Meta-X, where the Meta key may be either a special key on your keyboard @@ -106,12 +134,23 @@ Undo. Undo. .El .Pp -For more key bindings, type +For a complete set of key bindings, type .Dq M-x describe-bindings . -.Sh CONFIGURATION AND COMMANDS -Amongst other major differences, the -.Nm -configuration files are much simpler than real emacs. +.Sh COMMANDS +Commands are invoked by +.Dq M-x , +or by binding to a key. +Many commands take an optional numerical parameter, +.Va n . +This parameter is set either by +M-<n> (where +.Va n +is the numerical argument) before the command, or by +one or more invocations of the universal argument, usually bound to C-U. +When invoked in this manner, the value of the numeric parameter to +be passed is displayed in the minibuffer before the M-x. +.\" A complete list of commands is given in mg(5) +.Sh CONFIGURATION FILES There are two configuration files, .Pa .mg , and @@ -126,51 +165,16 @@ will use .Pa .mg-vt100 as a startup file. The terminal type startup file is used first. +.Pp The startup file format is a list of commands, one per line, as used for -interactive evaluation, e.g.: +interactive evaluation. +Strings that are normally entered by the user at any subsequent prompts +may be specified after the command name; e.g.: .Bd -literal -offset indent auto-fill-mode set-fill-column 72 global-set-key "\e^x\e^f" find-file .Ed -.Pp -Here's another example sequence that you may find useful. -By default, -.Dq () -and -.Dq [] -are recognized as brackets, so bracket matching can be done. -The following defines -.Dq {} -as brackets, and turns on the mode that causes -the cursor to "blink" to show you matching brackets. -.Bd -literal -offset indent -global-set-key } blink-matching-paren-hack -blink-matching-paren -set-default-mode blink -.Ed -.Pp -More complicated key mappings are also possible, though there are some -internal limitations compared to regular emacs. -An example of how to map control characters and sequences follows, -illustrating the Gosling-like line scrolling characters. -.Bd -literal -offset indent -global-set-key "\\^Z" scroll-one-line-up -global-set-key "\\ez" scroll-one-line-down -global-set-key "\\^_" suspend-emacs -.Ed -.Pp -In order to use 8-bit characters, the Meta key needs to be disabled. -This is required to read high bit characters like German umlauts. -ESC can be used instead of the Meta key \(en see the -.Sx KEY BINDINGS -section for details. -Execute the following command or add it to -.Pa .mg -to disable the Meta keys on startup: -.Bd -literal -offset indent -meta-key-mode -.Ed .Sh FILES .Bl -tag -width ~/.mg-TERM -compact .It Pa ~/.mg @@ -182,14 +186,15 @@ terminal-specific startup file .Xr vi 1 .Sh CAVEATS .Nm -differs primarily in not having special modes for tasks other than -straight editing, e.g., mail and news, and in not having special modes that -support various programming languages. -It does have text justification -and auto-fill mode. +differs from other emacs implementations primarily in not having many +special modes for tasks other than straight editing, and in not having +special modes that support various programming languages. +.Pp Since it is written completely in C, there is no -language in which you can write extensions. -However, you can rebind keys and change some parameters. -There are no limits to line length or format. -Command, buffer, and file name completion and listing can -be done using the spacebar and tab keys. +language in which you can write extensions; +however, you can rebind keys and change certain parameters. +.Pp +In order to use 8-bit characters (such as German umlauts), the Meta key +needs to be disabled via the +.Dq meta-key-mode +command. |