[LTP] [PATCH] filecaps: Respect TMPDIR environment variable

[Jan Stancek]

----- Original Message -----
> The filecapstest.sh wrapper script already allowed the /tmp directory to
> be overridden with the TMP environment variable, however doing so had
> no effect on verify_caps_exec because it created its own version of this
> fifo at a hardcoded location under /tmp.
> 
> Change the wrapper script to check for TMPDIR instead of TMP, to match
> the value exported by runltp. Export FIFOFILE, to be used by the test
> binaries invoked by the script.
> 
> Change the print_caps and verify_caps_exec to read FIFOFILE from the
> environment (if it exists). Otherwise, TMPDIR will be read from the
> environment and used to construct the path to the caps_fifo file.
> 
> Signed-off-by: Alistair Strachan <astrachan@google.com>

I moved get_caps_fifo() to common header, changed it to use
getenv() ptr directly when possible and pushed.

Thanks,
Jan