Thread View: comp.lang.awk
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2 total messages
Started by Alan Yeung
Fri, 09 May 1997 00:00
Changing fields
Author: Alan Yeung
Date: Fri, 09 May 1997 00:00
Date: Fri, 09 May 1997 00:00
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hi all, i'm an awk newbie, and i was looking at the man page of awk on an AIX machine. it says that "selected portions of the input file can be altered", but doesn't say how. so i surfed the net hoping to find out how. but it seems that most of the implementions do not allow alteration of the original input, so i'm comfused as to whether input can be altered at all. any hints are appreciated. thanx! al
Re: Changing fields
Author: ptjm@ican.net (P
Date: Mon, 12 May 1997 00:00
Date: Mon, 12 May 1997 00:00
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In article <33738DA5.4DAB@sasktel.sk.ca>,
Alan Yeung <alan.yeung@sasktel.sk.ca> wrote:
% i'm an awk newbie, and i was looking at the man page of awk on an AIX
% machine.
% it says that "selected portions of the input file can be altered",
awk can't be used to edit a file in place. If you need to do that,
consider using ed, or else redirect the awk output to a temp file and
rename the temp file. For instance, you can do something like this:
BEGIN { ARGC = 2; ARGV[1] = "a.b" }
{ print $3,$2,$1 > "b.a" }
END {
system("rm a.b")
system("mv b.a a.b")
}
--
Patrick TJ McPhee
East York Canada
ptjm@ican.net
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