Bc in shell script is creating blank files Post: 302901835

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Top Forums Shell Programming and Scripting Bc in shell script is creating blank files Post 302901835 by Don Cragun on Friday 16th of May 2014 01:16:09 AM

05-16-2014

Registered User

You didn't say which version of UNIX you're using and you didn't say which version of ksh you're using. If you just want to use ksh and wc (instead of awk), you can also try the following:

Code:

#!/bin/ksh
#set -xv
err_log="err_log"
err_list="err_list"
feed_cnt=$(wc -l < "$err_log")
err_tol=$(((feed_cnt + 25) / 50))
# grep -iFf "$err_list" "$err_log"
err_cnt=$(grep -iFcf "$err_list" "$err_log")
if [ "$err_cnt" -gt "$err_tol" ]
then
	echo "Errors exceed the tolerance level"
	exit 1
fi

Note that Aia's awk script looks for exact (case sensitive) full line matches; the code above looks for case insensitive matches where the complete contents of any line from err_list appears anywhere on a line in err_log.

If you want the behavior of the script above, but want to use awk instead, the changes to Aia's awk script to get that behavior are minor.

Since you didn't give us any sample data, I tried to match the options you gave to grep. But, I assumed you were looking for fixed strings rather than having a list of basic regular expressions in err_list.

If we guessed wrong, give us details of your real requirements.

If you're using a 1993 or later version of ksh, we can use floating point arithmetic to compute err_tol instead of playing games with rounding using integer arithmetic.

If you have an old UNIX system with a grep that doesn't accept the -Foption, change grep -iFcf to fgrep -icf.

Don Cragun

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LEARN ABOUT MINIX

grep

GREP(1) 						      General Commands Manual							   GREP(1)

NAME

       grep - search a file for lines containing a given pattern

SYNOPSIS

       grep [-elnsv] pattern [file] ...

OPTIONS

       -e     -e pattern is the same as pattern

       -c     Print a count of lines matched

       -i     Ignore case

       -l     Print file names, no lines

       -n     Print line numbers

       -s     Status only, no printed output

       -v     Select lines that do not match

EXAMPLES

       grep mouse file	   # Find lines in file containing mouse

       grep [0-9] file	   # Print lines containing a digit

DESCRIPTION

       Grep  searches  one  or	more  files (by default, stdin) and selects out all the lines that match the pattern.  All the regular expressions
       accepted by ed and mined are allowed.  In addition, + can be used instead of * to mean 1 or more occurrences, ? can be used to mean 0 or  1
       occurrences,  and  |  can  be used between two regular expressions to mean either one of them.  Parentheses can be used for grouping.  If a
       match is found, exit status 0 is returned.  If no match is found, exit status 1 is returned.  If an error is detected,  exit  status  2	is
       returned.

SEE ALSO

       cgrep(1), fgrep(1), sed(1), awk(9).

																	   GREP(1)

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