Shell Programming and Scripting

Note that your code above has an unmatched backquote at the end of the awk command. And, the awk command and the assignment to the shell variable delim_flag are completely independent and do not affect each other in any way.

Furthermore, the awk command I suggested (modified to look for 29 field delimiters instead of 3:

Code:

awk -F '[~][|][*]' 'NF!=30{x=1;exit}END{print x+0}' file

produces the same results as your awk command, but runs faster if any lines are found in your input file that do not contain the desired number of field delimiters. (Your code reads every line in the input file; my suggested code stops reading the input file as soon as it finds a line that does not contain the specified number of fields.)

If you are trying to set a shell variable to a value to indicate whether or not an error (a line with the wrong number of delimiters) was found, the way to do that would be something like:

Code:

delim_flag="$(awk -F '[~][|][*]' 'NF!=30{x=1;exit}END{print x+0}' file)"

MY sample data

Code:

ABC|edgf|T1J333|201211304
ABC|edgf|T1J333|201211303
ABC|edgf|T1J333|201211302
ABC|edgf|T1J333|20121131
TRL00004

new requirement in which Trailer is add in file

Code:

delim_flag=0
	delim_flag_val=`awk -F "|" 'BEGIN{delim_flag=0} NF != 38 {delim_flag=1} END{print dlim_flag}' "FILENAME"`

please suggest how i ignore in same command

Please use code tags as required by forum rules!

Actually, regardless of the trailer being present or not, your code applied to the sample data will yield a "1" printed, as there won't be any lines with 38 fields.

And, in order to present a half way reasonable suggestion to solve your problem, additional info is needed:
- is the trailer always one line?
- is the trailer always one field?

MY sample data

Code:

ABC|edgf|T1J333|201211304
ABC|edgf|T1J333|201211303
ABC|edgf|T1J333|201211302
ABC|edgf|T1J333|20121131
TRL00004

new requirement in which Trailer is add in file

Code:

delim_flag=0
delim_flag_val=`awk -F "|" 'BEGIN{delim_flag=0} NF != 4 {delim_flag=1} END{print dlim_flag}' "FILENAME"`

please suggest how i ignore trailer in file . trailer always one line and one field and start with TRL

Please use code tags as required by forum rules!

---------- Post updated at 15:39 ---------- Previous update was at 15:36 ----------

A few options:

Code:

awk -F "|" 'BEGIN {LAST = 4} LAST != 4 {delim_flag=1; exit} {LAST = NF} END{print delim_flag+0}' file
0
awk -F "|" '/^TRL/ {next} NF != 4 {delim_flag=1; exit} END{print delim_flag+0}' file
0

Please let me know how to use code tag

Use e.g. the code tag button. There's a hint/description right above the editor window.