awk, ENVIRON usage 1

[w5000]

hello,
can it be used with ENVIRON instead of -v?

# free=50
# size=60
# awk -va=${free} -vb=${size} 'BEGIN{printf "%3.2f\n", a/b*100}'
83.33
# awk 'BEGIN{printf "%3.2f\n", $ENVIRON["free"]/$ENVIRON["size"]*100}'
awk: 0602-562 Field $() is not correct.
The source line number is 1.
#

 

[feherke]

Hi

The [tt]$[/tt] sigil denotes a field. So [tt]$ENVIRON["free"][/tt] is actually [tt]$50[/tt] in this case. Just remove those [tt]$[/tt] signs.

( By the way, the free and size environment variables were [tt]export[/tt]ed, right ? They need to be, if you want subsequent processes to see them. )

Feherke.
feherke.ga

 

[w5000]

thank you, indeed works now
# awk 'BEGIN{printf "%3.2f\n", ENVIRON["free"]/ENVIRON["size"]*100}'
83.33
#