rkc@XN.LL.MIT.EDU (rkc) (05/26/89)
I have an application where I want to run a file through cpp and then strip that file of all the nasties that cpp generates, namely: 1. Lines beginning "# line number info " and 2. The many blank lines. It seems to me that sed should be able to do this for me--but I'm not sure how to go about it. I can get sed to do #1 by using the script: sed /^#/,/\n/d filename but I can't figure out how to do #2. Surely there is a sed guru out there who can help me...(Add other pitiful cries for help.) Please e-mail responses, as I do not read this newsgroup. Thanks, -Rob
mende@athos.rutgers.edu (Bob Mende Pie) (05/26/89)
In article <1415@xn.LL.MIT.EDU> rkc@XN.LL.MIT.EDU (rkc) writes: > I have an application where I want to run a file through cpp and then > strip that file of all the nasties that cpp generates, namely: > 2. The many blank lines. to do this I use egrep -v '^$' /Bob... --
funk@osiris.cso.uiuc.edu (05/27/89)
> I have an application where I want to run a file through cpp and then > strip that file of all the nasties that cpp generates, namely: > 1. Lines beginning "# line number info " > and 2. The many blank lines. > It seems to me that sed should be able to do this for me-- > but I can't figure out how to do #2. Surely there is a sed guru out there who > can help me...(Add other pitiful cries for help.) Try sed "/^ *$/d" That will delete all lines consisting of (only) any number of blnks ------------------------------------------------------------------------------- | Bruce Funk INTERNET: funk@osiris.cso.uiuc.edu | |ACSEH, 21st TAACOM __________________________________________________| |Kaiserslautern, W. Germany | Any resemblance between me and reality | |(guesting on osiris) | is strictly coincidental | -------------------------------------------------------------------------------
jeff@quark.WV.TEK.COM (Jeff Beadles) (05/27/89)
In article <May.25.18.16.13.1989.2763@athos.rutgers.edu> mende@athos.rutgers.edu (Bob Mende Pie) writes: >In article <1415@xn.LL.MIT.EDU> rkc@XN.LL.MIT.EDU (rkc) writes: >> I have an application where I want to run a file through cpp and then >> strip that file of all the nasties that cpp generates, namely: >> 2. The many blank lines. > > to do this I use egrep -v '^$' This will not work if the line has any whitespace on it. This should do everything that he wants with one sed command. The 2nd -e sequence will delete any empty line, or one containing only white space. cat file | sed -e '/^#.*$/d' -e '/^[ ]*$/d' There's a space and a tab between the []'s. -Jeff -- Jeff Beadles Utek Sustaining Engineering, Tektronix Inc. jeff@quark.WV.TEK.COM