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From: Nikos Vassiliadis <nvass@teledomenet.gr>
To: Olivier Regnier <oregnier@oregnier.net>
Date: Fri, 15 Jun 2007 15:46:53 +0300
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Cc: freebsd-questions@freebsd.org
Subject: Re: problem with sed command and csh
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On Friday 15 June 2007 15:24, Olivier Regnier wrote:
> Nikos Vassiliadis a écrit :
> > On Friday 15 June 2007 13:29, Olivier Regnier wrote:
> >> Hi everybody,
> >>
> >> Actually, i'm working on FreeBSD 6.2 and csh shell. With a sh script,
> >> i trying to execute this command :
> >> sed -e "s/MAKE_ARGS\([^{]*\){/MAKE_ARGS\1{\n\t'mail/nbsmtp' =>
> >> 'WITH_IPV6=1 WITH_SSL=1',/" > /usr/local/etc/pkgtools.conf
> >>
> >> The result is not correct, i have an error :
> >> sed: 1: "s/MAKE_ARGS\([^{]*\){/M . . .": bad flag in subsitute
> >> command: 'n'
> >>
> >> Can you help me please ?
> >
> > s/MAKE_ARGS\([^{]*\){/MAKE_ARGS\1{\n\t'mail/nbsmtp' =>
> > This n is invalid--------------------------^^^
> >
> > You should add a backslash before each slash
> > that is not used as a separator for the s command.
> > E.g.
> > s/I want to substitute the \/ character/with the _ character/
> > s/\/\/\//three slashes/
> >
> > You can also use a separator of choice for the s command.
> > That is:
> > s/foo/bar/ is equivalent to s@foo@bar@
> > is equivalent to sAfooAbarA
> > is equivalent to s1foo1bar1.
> >
> > keep in mind, that our sed might not be
> > totally compatible with GNU sed.
> >
> > HTH, Nikos
>
> Thank for you anserw but the result is bad again :)
> I tryed this : sed "s/MAKE_ARGS\([^{]*\){/MAKE_ARGS\1{\n\t'mail\/nbsmtp'
> => 'WITH_IPV6=1 WITH_SSL=1',/" > /usr/local/etc/pkgtools.conf
> but i have this with cat /usr/local/etc/pkgtools.conf
>
> MAKE_ARGS = {nt'mail/nbsmtp' => 'WITH_IPV6=1 WITH_SSL=1',
> }
>
> Sed and csh is strange no ? I think \n \t not supported by csh.

No, its sed. You cannot use backslash notation with
BSD sed.
nik:0:~$ sed "s/foo/\t\n/"
foo
tn

You can use a literal tab character, but not a literal
newline character...

How about this?
nik:0:~$ echo foo | awk '{ sub(/foo/, "foo\n\tbar"); print; }'
foo
        bar

HTH, Nikos