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c9c0ac7d36
Be more consistent in allowing the user to override use of the temporary directory by specifying $TMPDIR. Also prefer P_tmpdir macro (defined in <stdio.h>) if that is defined, rather than hard-coding "/tmp" for the fallback location.
This is a test tool, not a comprehensive test, but a "does it basically function" test, which can be packaged and given to end users. It also collects and prints a lot of internal debug information, which is useful in bug reports to track down appliance / qemu boot problems. For more information, please read the man page libguestfs-test-tool(1).