06-27-2016
The entire logic and structure of that script seems suboptimal. For every file found, you (re)open "alter.txt", read every single line, invoke awk twice and - I'm guessing based on your other threads - run something like sed to do the replacements.
Depending on the found files' count this IS going to be lengthy.
I'm not talking of improving the innermost loop here - although there is quite some potential.
Why don't you leave the looping to one single instance of e.g. awk?
Create a list of all file candidates (find can have several paths as starting points) and run awk, first reading all the search/replacement pairs, and then working those on all files presented.
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IGAWK(1) Utility Commands IGAWK(1)
NAME
igawk - gawk with include files
SYNOPSIS
igawk [ all gawk options ] -f program-file [ -- ] file ...
igawk [ all gawk options ] [ -- ] program-text file ...
DESCRIPTION
Igawk is a simple shell script that adds the ability to have ``include files'' to gawk(1).
AWK programs for igawk are the same as for gawk, except that, in addition, you may have lines like
@include getopt.awk
in your program to include the file getopt.awk from either the current directory or one of the other directories in the search path.
OPTIONS
See gawk(1) for a full description of the AWK language and the options that gawk supports.
EXAMPLES
cat << EOF > test.awk
@include getopt.awk
BEGIN {
while (getopt(ARGC, ARGV, "am:q") != -1)
...
}
EOF
igawk -f test.awk
SEE ALSO
gawk(1)
Effective AWK Programming, Edition 1.0, published by the Free Software Foundation, 1995.
AUTHOR
Arnold Robbins (arnold@skeeve.com).
Free Software Foundation Nov 3 1999 IGAWK(1)