02-19-2009
Check for more than one expression using AWK
I have a txt file like below:
testin.txt
AB
BC
CD
DE
I have the following awk script
BEGIN {flag1="N"}
/(AB)|(BC)|(CD)|(DE)/ {flag1="Y"}
END {print flag1}
>awk -f testin.awk testin.txt
Returns
Y
I need to set the flag as Y if all the expressionz, i.e. AB, BC, CD and DE exists. I tried giving & and &&. But it didn't work out.
I am very new to awk. Can someone please help?
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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)