162 lines
2.9 KiB
Plaintext
162 lines
2.9 KiB
Plaintext
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.TH RWD 1
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.SH NAME
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rwd, conswdir \- maintain remote working directory
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.SH SYNOPSIS
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.B rwd
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.I path
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.PP
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.B conswdir
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[
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.I prog
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]
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.SH DESCRIPTION
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.I Rwd
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and
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.I conswdir
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conspire to keep
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.IR rio (4)
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and
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.IR acme (4)
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informed about the current directory on
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remote systems during login sessions.
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.I Rio
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and
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.I acme
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include this information in plumb messages sent to
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.IR plumber (4).
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If the remote system's name space is mounted in the
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plumber's name space,
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the end result is that file paths printed during the session
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are plumbable.
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.PP
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.I Rwd
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informs
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.IR rio
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and
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.IR acme
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of directory changes.
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The name of the remote machine is taken from
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the environment variable
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.BR $remotesys .
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.I Rwd
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writes the full path to
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.BR /dev/wdir ;
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writes the last element of the path,
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suffixed by
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.BI @ remotesys \fR,
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to
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.BR /dev/label ;
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and when run inside a
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.I win
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(see
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.IR acme (1))
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window, changes the window title to
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.IB path /- remotesys
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using
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.BR /dev/acme/ctl .
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.PP
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.I Conswdir
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copies standard input to standard output, looking for in-band messages
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about directory changes.
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The messages are of the form:
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.IP
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.EX
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\e033];\fIpath\fP\e007
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.EE
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.LP
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where
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.B \e033
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and
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.B \e007
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are ASCII escape and bell characters.
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Such messages are removed from the stream and not printed to standard output;
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for each such message
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.I conswdir
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runs
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.I prog
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(default
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.BR /bin/rwd )
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with
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.I path
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as its only argument.
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.SH EXAMPLES
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Add this plumbing rule (see
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.IR plumb (6))
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in order to run commands in the plumber's name space:
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.IP
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.EX
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# have plumber run command
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kind is text
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data matches 'Local (.*)'
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plumb to none
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plumb start rc -c $1
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.EE
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.PP
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Mount a Unix system in your name space and the plumber's:
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.IP
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.EX
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% 9fs unix
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% plumb 'Local 9fs unix'
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.EE
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.LP
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(If you're using acme, execute
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.B "Local 9fs unix
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with the middle button to mount the Unix system in acme's name space.)
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.PP
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Connect to the Unix system, processing in-band directory change messages:
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.IP
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.EX
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% ssh unix | aux/conswdir
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.EE
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.PP
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Add this shell function to your
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.B .profile
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on the Unix system
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to generate directory change messages every time a
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.B cd
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command is executed:
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.IP
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.EX
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H=`hostname | sed 's/\e..*//'`
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_cd () {
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\ecd $* &&
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case $- in
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*i*)
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_dir=`pwd`
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echo /n/$H$_dir | awk '{printf("\e033];%s\e007", $1);}'
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esac
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}
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alias cd=_cd
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.EE
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.PP
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The examples described so far only help for relative
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path names. Add this plumbing rule to handle rooted names
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like
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.BR /usr/include/stdio.h :
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.IP
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.EX
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# remote rooted path names
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type is text
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wdir matches '/n/unix(/.*)?'
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data matches '/([.a-zA-Z¡-0-9_/\e-]*[a-zA-Z¡-0-9_/\e-])('$addr')?'
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arg isfile /n/unix/$1
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data set $file
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attr add addr=$3
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plumb to edit
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|
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plumb client window $editor
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|
|
.EE
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|
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.SH SOURCE
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.B /rc/bin/rwd
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.br
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.B /sys/src/cmd/aux/conswdir.c
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.SH SEE ALSO
|
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|
|
.IR plumber (4),
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|
.IR plumb (6),
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|
.IR srv (4)
|
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|
|
.SH BUGS
|
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|
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This mechanism is clunky, but Unix and SSH
|
||
|
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make it hard to build a better one.
|
||
|
|
.PP
|
||
|
|
The escape sequence was chosen because
|
||
|
|
it changes the title on xterm windows.
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