[9fans] \n\n\n to \n\n

[9fans] \n\n\n to \n\n

[Joel Salomon]

> however, sed doesn't like long lines

> you could do it in sam: s/\n\n\n/\n\n/g

Was the "stream sam" mentioned in the Structured Regular Expressions paper
ever written - or can sam be run in streaming mode?

--Joel

Re: [9fans] \n\n\n to \n\n

[Douglas A. Gwyn]

Joel Salomon wrote:
> .. can sam be run in streaming mode?

No, sam -d gets its commands from stdin, but you
ought to be able to open from one stream and write
to another, e.g. on Research Unix one could
shuffle file descriptors in the Bourne shell (exec
sometimes helped) and sam could read /dev/fd/4 and
write /dev/fd/5 for example).  A different form of
plumbing.

Re: [9fans] \n\n\n to \n\n

[Dan Cross]

> No, sam -d gets its commands from stdin, but you
> ought to be able to open from one stream and write
> to another, e.g. on Research Unix one could
> shuffle file descriptors in the Bourne shell (exec
> sometimes helped) and sam could read /dev/fd/4 and
> write /dev/fd/5 for example).  A different form of
> plumbing.

Hmm, sounds a lot like /fd/*.  rc(1) lets you shuttle file
descriptors around rather easily.

	- Dan C.

Re: [9fans] \n\n\n to \n\n

[Steve Simon]

AGC wrote a stream sam in posix C:
	http://www.westley.demon.co.uk/src/ssam-1.9.tar.gz
I always meant to have a look at it and never got round to it...

-Steve

Re: [9fans] \n\n\n to \n\n

[Fco.J.Ballesteros]

> AGC wrote a stream sam in posix C:

And of course you can always wrap sam in a script just to
pretend that you have ssam.

[9fans] \n\n\n to \n\n

[peter a. cejchan]

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hi,
(sorry for this off-topic question, but)
i don't know how to translate triple newlines into double ones.
i tried tr \n to something else and then sed,
however, sed doesn't like long lines :-(
any hint appreciated,
thanks, regards,

++pac

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Re: [9fans] \n\n\n to \n\n

[Russ Cox]

you could do it in sam: s/\n\n\n/\n\n/g

Re: [9fans] \n\n\n to \n\n

[Ralph Corderoy]

Hi pac,

> i don't know how to translate triple newlines into double ones.
> i tried tr \n to something else and then sed,

You could do it with sed.  awk does just as well for a throw-away
one-liner.

    awk '{c = c * !length * (c != 3) + !length} c < 3'

> however, sed doesn't like long lines :-(

Use GNU sed!

Cheers,

-- 
Ralph Corderoy.      http://inputplus.co.uk/ralph/     http://troff.org/