×
INTELLIGENT WORK FORUMS
FOR COMPUTER PROFESSIONALS

Contact US

*
*
*
*

Thanks. We have received your request and will respond promptly.

Log In

Come Join Us!

Are you a
Computer / IT professional?
Join Tek-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
*Tek-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

file availability getline way

thread271-1821124

file availability getline way

file availability getline way

(OP)
Hi,

I am using getline to check whether input file is available or not.

The following is working fine:

Input file name: file<ym>

read -p "Enter month : " ym
awk 'BEGIN{
print getline < "file'$ym'" <0 ? "Not Available" : "Available"
}'

but when i use the variable within awk its not working

awk 'BEGIN{
month=202303
print getline < "file"month <0 ? "Not Available" : "Available"
}'

Please help
Thank you








RE: file availability getline way

Hi

Dumb thing as according to operator precedence should be fine, but in reality you have to add parentheses :

CODE

awk 'BEGIN{
month=202303
print getline < ("file"month) <0 ? "Not Available" : "Available"
}'

Feherke.
feherke.github.io

RE: file availability getline way

(OP)
Thank you very much!
Does this parenthesis syntax apply only when getline is used?

RE: file availability getline way

Hi

Maybe my memories are failing, as I can not reproduce it right now, but I have a feeling that also met it with print when writing to file. But I would say on file/pipe input/output operations.

Feherke.
feherke.github.io

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Tek-Tips Forums free from inappropriate posts.
The Tek-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Tek-Tips forums is a member-only feature.

Click Here to join Tek-Tips and talk with other members! Already a Member? Login
Close Box

Join Tek-Tips® Today!

Join your peers on the Internet's largest technical computer professional community.
It's easy to join and it's free.

Here's Why Members Love Tek-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close