iowatcher: Rework --prog to make arg processing safer
Previously the --prog option required the program-to-be-run to be
specified as a single string. This meant that shell escaping would be
lost in translation and a sub-shell would be run. Rework --prog to not
take an argument and accept the arguments left after option processing
has ended as the argv for the program-to-be-run.
As we have the program as an argv, run_program2() can now be used to run
it, and now that run_program() is no longer used we can remove it and
remove the '2' from run_program2.
New usage example:
# iowatcher -p -t foo -d /dev/sda3 sleep 10
running blktrace blktrace -b 8192 -a queue -a complete -a issue -a notify -D . -d /dev/sda3 -o foo
running 'sleep' '10'
sleep exited with 0
Docs have been updated accordingly.
Signed-off-by: Andrew Price <email@example.com>
5 files changed