WM-SH(1) WM-SH(1)
NAME
sh, mash - Window frames for the Inferno shells
SYNOPSIS
wm/sh [ -b ] [ -w width ] [ -h height ] [ -f font ] sh-args
wm/mash mash-args
DESCRIPTION
Both wm/sh and wm/mash provide a graphical framework to
their respective shells. Both wrappers manage the input and
output of the shell. They provide facilities for scrolling
and editing the output buffer and for constructing input to
be sent to the shell.
Wm/sh invokes the shell sh(1) with the arguments -n sh-args;
wm/mash invokes mash(1) with the arguments mash-args. Wm/sh
accepts the following additional options, which are not
passed through to sh:
-b
Inverts the default background and text color scheme.
-w width
The window should be at least width pixels wide.
-h height
The window should be at least height pixels high.
-f font
Specify the font to use in the window. Font should be
the name of a valid font(6) file.
Wm/sh and wm/mash both provide their own versions of
/dev/cons and /dev/consctl files in the namespace of the
invoked shell (see cons(3) for the originals) and attach the
standard input of the invoked shell to the virtualised
/dev/cons file. Output from the shell, or of any commands
run by the shell, is displayed in a scrollable text window,
appearing at the output position, which is at the end of any
previously output text, before any as-yet-unread user input
text.
Any text displayed on the console can be edited. Typed text
is always inserted at the position of the input cursor. The
input cursor can be moved to any point in the text by click-
ing mouse button-1 at the desired position. Selections can
be made by dragging the mouse with button-1 held down. Typ-
ing into a selection copies its text to the Snarf buffer,
the selected text is deleted and the typed character
inserted.
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Text typed beyond the output point will be made available to
commands reading from /dev/cons. Normally this text is made
available when newline is typed, but typing ESC turns on
hold mode (the text turns blue), deferring the availability
of the text until ESC is typed again, turning hold mode off.
This allows simple multi-line editing of the standard input
to a command.
Writing rawon to /dev/consctl changes the above behaviour,
making each character typed beyond the output point avail-
able to commands as soon as it is typed; the character is
not automatically echoed. Writing rawoff to /dev/consctl
reverses this behaviour.
In addition to dragging out selections, they can be made by
double clicking mouse button-1. Double clicking over a word
selects the whole word. Double clicking next to a brace or
bracket selects the text between it and its matching brace
or bracket. If there is no match then no selection is made.
Clicking mouse button-2 displays a pop-up menu of editing
commands:
Cut Copy the current selection to the Snarf buffer and then
delete the selected text. This command has no effect
if there is no selected text, the Snarf buffer is not
cleared.
Paste
When there is no text selected, the contents of the
Snarf buffer are inserted at the current input cursor.
If a selection exits, its text is replaced by that of
the Snarf buffer. The new text is then selected. The
contents of the Snarf buffer remain unaltered.
Snarf
Copy the selected text to the Snarf buffer. This com-
mand has no effect if there is no selected text.
Send If there is any text selected it is copied to the Snarf
buffer. The contents of the Snarf buffer is then
appended to the end of the current shell input line,
forwarding any NewLine completed lines to the shell's
input stream.
Mouse chording is implemented as in acme(1). Dragging a
selection with button-1 held down and then also clicking
button-2 cuts the selected text into the Snarf buffer.
Clicking button-3 instead of button-2 replaces the selected
text with the contents of the Snarf buffer.
Clicking mouse button-3 plumbs the word or selection under
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the click point. See plumber(8) for more information on
plumbing.
Wm/sh also serves the file /chan/shctl. The following com-
mands may be written to this file:
cwd dir
Causes any plumbing request generated by wm/sh to be
created with dir as its ``current directory''. This is
shown in the title bar of the window. Note that it is
up to the command running inside wm/sh to keep this up
to date (for instance, see EXAMPLES, below).
button title sendtext
A Tk button is created at the top of the shell window,
labeled with title. When activated, sendtext will be
sent to the shell window as if it had been typed.
action title sendtext
A button is created as for the button command, except
that activation of the button causes sendtext to be
sent to any process reading from /chan/shctl.
clear
Delete any buttons that have been created.
Arguments to commands sent to /chan/shctl follow sh(1) quot-
ing rules (the same as implemented by quoted and unquoted in
string(2)). A process reading from /chan/shctl will block
until an action button is activated, whereupon it will yield
the sendtext associated with the button.
PLUMBING
Both wm/sh and wm/mash plumb text selected by button 3; an
empty selection plumbs the white-space bounded text sur-
rounding the selection.
EXAMPLES
Define a sh(1) function to update the current directory
automatically:
fn cd {builtin cd $*; echo cwd `{pwd} >/chan/shctl}
Note that this will not work in all cases, as it is possible
to change the current directory without using the cd com-
mand.
Create a button to automate a mount command (note the new-
line in the argument string):
echo ${quote button mount 'mount kremvax /n/remote
'} > /chan/shctl
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Create a new wm/sh window with the above button already cre-
ated:
wm/sh -ic {
echo ${quote button mount 'mount kremvax /n/remote
'} > /chan/shctl
}
SOURCE
/appl/wm/sh.b
/appl/wm/mash.b
SEE ALSO
sh(1), mash(1), wm(1), plumber(8)
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