Pass command line arguments to awk Post: 302380494

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Top Forums Shell Programming and Scripting Pass command line arguments to awk Post 302380494 by kristinu on Tuesday 15th of December 2009 10:07:05 AM

12-15-2009

Registered User

Pass command line arguments to awk

I am trying to pass max as a sommand line argument when I call awk.

Made the modification in the BEGIN but it is not working

I'm getting an error as below:

Code:

awk: txsrx.awk:82: (FILENAME=jcd.tx FNR=4161) fatal: cannot open file `40' for reading (No such file or directory)

Somehow it is reading 40 and interpreting it as a file.

Code:

# 1: Absolute value of a number
function abs(val) {
    return val > 0 ? val : -val
}

# 2: Read file twice, set maximum S-R distance
BEGIN {
#    ARGV[ARGC++] = ARGV[ARGC-1]
    print "0." ARGV[0]
    print "1." ARGV[1]
    print "2." ARGV[2]
    print ""
    ARGV[ARGC++] = ARGV[2]
    ARGV[ARGC-2] = ARGV[ARGC-3]
    max = 40
    print ARGC
    print "0." ARGV[0]
    print "1." ARGV[1]
    print "2." ARGV[2]
    print "3." ARGV[3]
}

# 3: First time round, store source location
FNR == NR {
    />/ && idx[FNR] = ++i
    $2 || val[i] = $1
    next
}

# 4: Second time round, get source location
FNR in idx {
    v = val[idx[FNR]]
}

# 5: Calculate S-R distance
{ !/>/ && dist = abs( $1 - v ) }

# 6: Print only if S-R distance less than max, create third column
# For the print statement can also use { OFS = ""; print $0, $2; OFS = " " }
/>/ || dist < max && NF == 2 { sub(/[ \t]+$/, ""); print }

kristinu

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LEARN ABOUT OPENSOLARIS

igawk

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).

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +--------------------+-----------------+
       |  ATTRIBUTE TYPE    | ATTRIBUTE VALUE |
       +--------------------+-----------------+
       |Availability	    | SUNWgawk	      |
       +--------------------+-----------------+
       |Interface Stability | Volatile	      |
       +--------------------+-----------------+
NOTES

       Source for gawk is available on http://opensolaris.org.

Free Software Foundation					    Nov 3 1999								  IGAWK(1)