Name
getline
Synopsis
getline getline [var] [<file]command| getline [var]command|& getline [var]{G}
Read next line of input.
The second form reads input from file
and the third form reads the output of
command. All forms read one record at a time,
and each time the statement is executed it gets the next record of
input. The record is assigned to $0 and is parsed into fields, setting
NF, NR, and FNR. If var is
specified, the result is assigned to var and
$0 and NF are not changed. Thus, if the result
is assigned to a variable, the current record does not change.
getline is actually a function
and it returns 1 if it reads a record successfully, 0 if
end-of-file is encountered, and -1 if for some reason it is
otherwise unsuccessful.
The fourth form reads the output from coprocess command. See the earlier section "Coprocesses and Sockets" for more information.
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