"system" command fails in a while getline loop

Robert Hustead — Tue, 15 Jul 2008 00:38:04 -0000

The following script runs identical to gawk except for the error message at the end of the output(on stderr, I used an editor to add it to the end of the stdout piped file for this bug submission). Gawk runs with the same result, but no error...

Error Example Script:

BEGIN {
print "------------------------------------------------------------"
dir="cmd /c dir /b"

while (( getline < system (dir) ) > 0) {
print $0
}

}

Result (Windows XP Pro SP2, Java JDK 1.6.0_06):
------------------------------------------------------------
getline.test
getline.test.gawk.out
getline.test.jawk.out
getline.test2
getline.test2.jawk.out
testp10.sv
testp10.sv.pdf
testp11.sv
testp11.sv.pdf
testp12.sv
testp12.sv.pdf
testp13.sv
testp13.sv.pdf
testp14.sv
testp14.sv.pdf
testp2.sv
testp2.sv.odot
testp2.sv.pdf
testp2.sv.svg
testp3.sv
testp3.sv.pdf
testp4.sv
testp4.sv.pdf
testp5.sv
testp5.sv.pdf
testp6.sv
testp6.sv.pdf
testp7.sv
testp7.sv.pdf
testp8.sv
testp8.sv.pdf
testp9.sv
testp9.sv.pdf
IO Exception: java.io.FileNotFoundException: 0 (The system cannot find the file
specified)

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"system" command fails in a while getline loop