Getline Summary (The GNU Awk User’s Guide)
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Gawk/docs/latest/Getline-Summary
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4.10.10 Summary of getline Variants
Table 4.1 summarizes the eight variants of getline
, listing which predefined variables are set by each one, and whether the variant is standard or a gawk
extension. Note: for each variant, gawk
sets the RT
predefined variable.
Variant | Effect | awk / gawk
|
---|---|---|
getline
|
Sets $0 , NF , FNR , NR , and RT
|
awk
|
getline var
|
Sets var , FNR , NR , and RT
|
awk
|
getline < file
|
Sets $0 , NF , and RT
|
awk
|
getline var < file
|
Sets var and RT
|
awk
|
getline | Sets $0 , NF , and RT
|
awk
|
getline var
|
Sets var and RT
|
awk
|
& getline | Sets $0 , NF , and RT
|
gawk
|
& getline var
|
Sets var and RT
|
gawk
|