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Full Discussion: stuck and confused
Top Forums UNIX for Dummies Questions & Answers stuck and confused Post 302135176 by cfajohnson on Thursday 6th of September 2007 03:11:03 PM
Old 09-06-2007
Quote:
Originally Posted by iago
What do you want to insert?
I want to insert the first argument, which will be a line of text

Where do you want to insert it?
In the middle of the second argument which is a text file

I assume that you do not want it in the middle of the second argument, but in the middle of the file pointed to by the second argument.

If that is the case, you need to find out how many lines are in the file, use head to read that number of lines; insert the text; use tail to get the rest of the file, or use awk.

Code:
lines=$( wc -l < "$2" )
middle=$(( $lines / 2 ))

awk -v mid=$middle -v text="$1" '
   NR == mid { print text }
             { print }' "$2" > tempfile

 

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GZEXE(1)						      General Commands Manual							  GZEXE(1)

NAME
gzexe - compress executable files in place SYNOPSIS
gzexe [ name ... ] DESCRIPTION
The gzexe utility allows you to compress executables in place and have them automatically uncompress and execute when you run them (at a penalty in performance). For example if you execute ``gzexe /bin/cat'' it will create the following two files: -r-xr-xr-x 1 root bin 9644 Feb 11 11:16 /bin/cat -r-xr-xr-x 1 bin bin 24576 Nov 23 13:21 /bin/cat~ /bin/cat~ is the original file and /bin/cat is the self-uncompressing executable file. You can remove /bin/cat~ once you are sure that /bin/cat works properly. This utility is most useful on systems with very small disks. OPTIONS
-d Decompress the given executables instead of compressing them. SEE ALSO
gzip(1), znew(1), zmore(1), zcmp(1), zforce(1) CAVEATS
The compressed executable is a shell script. This may create some security holes. In particular, the compressed executable relies on the PATH environment variable to find gzip and some other utilities (tail, chmod, ln, sleep). BUGS
gzexe attempts to retain the original file attributes on the compressed executable, but you may have to fix them manually in some cases, using chmod or chown. GZEXE(1)
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