regexp in the shell
Morris, Alex
alex.morris@jnli.com
Thu, 19 Apr 2001 13:21:48 -0400
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Thank you!
That worked like a charm, I really appreciate it :)
- Alex Morris
-----Original Message-----
From: Dpk [mailto:dpk@egr.msu.edu]
Sent: Thursday, April 19, 2001 1:11 PM
To: Morris, Alex
Cc: 'linux-user@egr.msu.edu'
Subject: Re: regexp in the shell
On Thu, Apr 19, 2001 at 12:53:50PM -0400, Morris, Alex wrote:
I'm using the ksh shell and have a problem. I have a variable in one of
my
scripts, and I need to extract a few characters from the variable and
store
it in another variable (preferably without using a temp file).
The basic format of the variable is:
IMPLEMNTATION ----------------------- xxxxxxxx!yyyyy 1 record(s)
selected.
I'm trying to extract that "xxxxxxxx" part. The number of dashes,
"-", is not static. The number of "x"'s is not static. And the
number of "y"'s is not static. I figure that I can search through
the variable and pull out everything between "----- " and "!", but
I don't know how to search through the variable...
Any idea how to do this, or what function to investigate? I was
looking at grep because it does regexp (which would make this easy)
but it returns lines that match a pattern, it cannot extract text
from a line.
Any ideas?
echo $myvariable |awk '{print $3}' |cut -d\! -f1
Dennis
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<P><FONT SIZE=2>Thank you!</FONT>
</P>
<P><FONT SIZE=2>That worked like a charm, I really appreciate it :)</FONT>
</P>
<P><FONT SIZE=2>- Alex Morris</FONT>
</P>
<P><FONT SIZE=2>-----Original Message-----</FONT>
<BR><FONT SIZE=2>From: Dpk [<A HREF="mailto:dpk@egr.msu.edu">mailto:dpk@egr.msu.edu</A>]</FONT>
<BR><FONT SIZE=2>Sent: Thursday, April 19, 2001 1:11 PM</FONT>
<BR><FONT SIZE=2>To: Morris, Alex</FONT>
<BR><FONT SIZE=2>Cc: 'linux-user@egr.msu.edu'</FONT>
<BR><FONT SIZE=2>Subject: Re: regexp in the shell</FONT>
</P>
<BR>
<P><FONT SIZE=2>On Thu, Apr 19, 2001 at 12:53:50PM -0400, Morris, Alex wrote:</FONT>
</P>
<P><FONT SIZE=2> I'm using the ksh shell and have a problem. I have a variable in one of my</FONT>
<BR><FONT SIZE=2> scripts, and I need to extract a few characters from the variable and store</FONT>
<BR><FONT SIZE=2> it in another variable (preferably without using a temp file).</FONT>
<BR><FONT SIZE=2> </FONT>
<BR><FONT SIZE=2> The basic format of the variable is:</FONT>
<BR><FONT SIZE=2> </FONT>
<BR><FONT SIZE=2> IMPLEMNTATION ----------------------- xxxxxxxx!yyyyy 1 record(s) selected.</FONT>
<BR><FONT SIZE=2> </FONT>
<BR><FONT SIZE=2> I'm trying to extract that "xxxxxxxx" part. The number of dashes,</FONT>
<BR><FONT SIZE=2> "-", is not static. The number of "x"'s is not static. And the</FONT>
<BR><FONT SIZE=2> number of "y"'s is not static. I figure that I can search through</FONT>
<BR><FONT SIZE=2> the variable and pull out everything between "----- " and "!", but</FONT>
<BR><FONT SIZE=2> I don't know how to search through the variable...</FONT>
<BR><FONT SIZE=2> </FONT>
<BR><FONT SIZE=2> Any idea how to do this, or what function to investigate? I was</FONT>
<BR><FONT SIZE=2> looking at grep because it does regexp (which would make this easy)</FONT>
<BR><FONT SIZE=2> but it returns lines that match a pattern, it cannot extract text</FONT>
<BR><FONT SIZE=2> from a line.</FONT>
<BR><FONT SIZE=2> </FONT>
<BR><FONT SIZE=2> Any ideas?</FONT>
</P>
<P><FONT SIZE=2>echo $myvariable |awk '{print $3}' |cut -d\! -f1</FONT>
</P>
<P><FONT SIZE=2>Dennis</FONT>
</P>
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