getline Variants
table-getline-variants
summarizes the eight variants of getline,
listing which built-in variables are set by each one,
and whether the variant is standard or a gawk extension.
Note: for each variant, gawk sets the RT built-in variable.
| Variant | Effect | Standard / Extension
|
|---|---|---|
getline | Sets $0, NF, FNR, NR, and RT | Standard
|
getline var | Sets var, FNR, NR, and RT | Standard
|
getline < file | Sets $0, NF, and RT | Standard
|
getline var < file | Sets var and RT | Standard
|
command | getline | Sets $0, NF, and RT | Standard
|
command | getline var | Sets var and RT | Standard
|
command |& getline | Sets $0, NF, and RT | Extension
|
command |& getline var | Sets var and RT | Extension
|
Table 4.1: getline Variants and What They Set