dynamically change awk Field Separator FS

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# 1  
Old 08-24-2009
dynamically change awk Field Separator FS

Hi All,

I was wondering if anyone knew how to dynamically change the FS in awk to accept vairiable containing a field separator. the current code is as below and does not work when i introduce the dynamic FS change :-(

datetimestamp=`date +"%Y%m%d%H%M%S"`

#awk 'BEGIN{ FS="|"; } {
awk 'BEGIN{ FS=file_delimeter; } {
if ( NF != field_count ) {
invalid_rec_count+=1 ;
# print the header for the bad file once....then start printing the invalid records to the same file...
print $0 > invalid_file ;

else {
valid_rec_count+=1 ;
END { printf "%-10s\t\n%-10s\t\n%-10s\t\n","Total Lines Read ["NR"]","Valid Records Found ["valid_rec_count"]","Invalid Records Found ["invalid_rec_count"]" ;

if (invalid_rec_count>1) {
print " "
print "Please refer to file "invalid_file" for full invalid record set."
' invalid_file="$invalid_file" field_count="$field_count" file_delimiter="$file_delimeter" $source_file

so when I call it i would want to pass a 4th parameter like:

validate_source_file "$filenamedir" "$source_tabin_name" "$field_count" ","


validate_source_file "$filenamedir" "$source_tabin_name" "$field_count" "|"

Any ideas appreciated!

# 2  
Old 08-24-2009
You have to pass variables into awk with -v

awk -v fdelim=$file_delimeter 'BEGIN{ FS=fdelim; } { 
        if ( NF != field_count ) {
< snip >

You can probably do it with -F as well and just get rid of the BEGIN statement:

awk -F $file_delimeter '{ 
        if ( NF != field_count ) {

# 3  
Old 08-24-2009
Works a treat!

Top stuff..solution well fine

cheers for responding! :-)

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