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authorPhilip Hands <phil@hands.com>2017-03-03 13:34:45 +0100
committerPhilip Hands <phil@hands.com>2017-03-07 23:50:21 +0100
commitfaa4c759b90a365e532321f18979812f9b6442eb (patch)
tree4007f217eade8c6280ed5d5213906d160d1f0156 /hosts/cb3a-armhf-rb/etc/apt/apt.conf.d/10no-package-descriptions
parent48327348c7ee0cceb1e8b5ddb082805651ee0fe0 (diff)
downloadjenkins.debian.net-faa4c759b90a365e532321f18979812f9b6442eb.tar.xz
lvc: reinstate VMcommand's ability to run commands and get results
This modifies the inittab to run a very simple loop on d-i's ttyS0 that reads commands from stdin, runs them and tops and tails the output with various control characters to make it easier to see when we have a result. It outputs a BEL (Ctrl-G, \a, \007) at the start, then an STX (\002) before running the command, and an ETX (\003) afterwards, to bracket STDOUT. After the ETX comes the command's return code, in decimal, then a US (\037), then comes the STDERR, and finally a NUL (\000) That lets us send an 'exit' and look for a BEL then issue a command and find the values required to populate the @returncode, @stdout and @stderr values.
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