is '!' a metacharacter in regexes? regex(6) doesn't say anything about it.



2014-04-23 9:29 GMT+02:00 Alexander Kapshuk <alexander.kapshuk@gmail.com>:

> Turns out, the reason why writing '/[A-Z]+\![a-z0-9]+\![0-9a-z]+' to
> /dev/$winid/addr would fail for me is because sending a string
> represented by the regular expression in question to /dev/$winid/body
> was immediately followed by writing the regexp to addr. Putting a
> while loop on the 'echo regexp >addr' followed by sleep, seems to have
> been the answer. The script sets the prompt and the name of the window
> running win when logged onto a UNIX machine.
> Here's the script for those interested.
>
> #!/bin/rc
> {
>  echo 'echo $SYSNAME!`uname -n`!$USER'
>  echo 'PS1='':; '' PS2='' '''
> } >/dev/$winid/body
> while(! echo -n '/[A-Z]+\![a-z0-9]+\![0-9a-z]+' >/dev/$winid/addr
> >[2]/dev/null)
>  sleep 0.2
> sel=`{cat /dev/$winid/xdata}
> echo name $sel >/dev/$winid/ctl
>
> On Tue, Apr 22, 2014 at 4:53 PM, Alexander Kapshuk
> <alexander.kapshuk@gmail.com> wrote:
> > Howdy,
> >
> > I'm working on a script where I want to get hold of a particular string
> > and use it as a new name of a particular window.
> >
> > What I've tried so far, although not successfully, is writing to
> > /dev/$winid/addr with the intention of then being able to read the
> > string found from the /dev/$winid/data or /dev/$winid/xdata.
> >
> > acme(4) says,
> > addr        may be written with any textual address (line number,
> >                regular expression, etc.), in the format understood by
> >                button 3 but without the initial colon, including com-
> >                pound addresses, to set the address for text accessed
> >                through the data file.
> >
> > Here's an example of what I tried.
> > echo '/[A-Z]+\![a-z0-9]+\![0-9a-z]+' >/dev/$winid/addr
> >
> > Which results in an 'address out of bounds' message being generated.
> >
> > How does one write to 'addr'? Clearly, the shortcoming is on my part.
> > I'm just not sure what it is that's missing.
> >
> > Thanks.
> >
>
>