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- // SPDX-License-Identifier: GPL-2.0
- // Simplest possible test of open() and then sendfile().
- // We write some zeroes into a file (since packetdrill expects payloads
- // to be all zeroes) and then open() the file, then use sendfile()
- // and verify that the correct number of zeroes goes out.
- `./defaults.sh
- /bin/rm -f /tmp/testfile
- /bin/dd bs=1 count=5 if=/dev/zero of=/tmp/testfile status=none
- `
- // Initialize connection
- 0 socket(..., SOCK_STREAM, IPPROTO_TCP) = 3
- +0 setsockopt(3, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0
- +0 bind(3, ..., ...) = 0
- +0 listen(3, 1) = 0
- +0 < S 0:0(0) win 32792 <mss 1000,sackOK,nop,nop,nop,wscale 10>
- +0 > S. 0:0(0) ack 1 <mss 1460,nop,nop,sackOK,nop,wscale 8>
- +0 < . 1:1(0) ack 1 win 514
- +0 accept(3, ..., ...) = 4
- +0 open("/tmp/testfile", O_RDONLY) = 5
- +0 sendfile(4, 5, [0], 5) = 5
- +0 > P. 1:6(5) ack 1
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