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getline VariantsTable 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 |
command | getline | Sets $0, NF, and RT | awk |
command | getline var | Sets var and RT | awk |
command |& getline | Sets $0, NF, and RT | gawk |
command |& getline var | Sets var and RT | gawk |
Table 4.1: getline variants and what they set