This is the command fiu-ctrl that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator
PROGRAM:
NAME
fiu-ctrl - a script to remote control programs using libfiu
SYNOPSIS
fiu-ctrl [options] PID [PID ...]
DESCRIPTION
fiu-ctrl is a script to enable/disable failure points in running programs that are using
libfiu(3).
Programs are usually launched using fiu-run(1), which enables libfiu's remote control
capabilities without the need to modify the program's code.
For additional documentation, go to the project's website at
http://blitiri.com.ar/p/libfiu.
OPTIONS
-c command
Run the given libfiu remote control command before executing the program (see below
for reference).
-f ctrlpath
Set the default prefix for remote control over named pipes. Defaults to
"$TMPDIR/fiu-ctrl", or "/tmp/fiu-ctrl" if "$TMPDIR" is not set, which is the
usually correct for programs launched using fiu-run(1).
Remote control commands are of the form "command param1=value1,param2=value2". Valid
commands are:
'enable name=NAME'
Enables the NAME failure point unconditionally.
'enable_random name=NAME,probability=P'
Enables the NAME failure point with a probability of P.
'disable name=NAME'
Disables the NAME failure point.
All of the enable* commands can also optionally take failnum and failinfo parameters,
analogous to the ones taken by the C functions.
EXAMPLES
The following command will tell the process running with PID 12345 to enable the failure
point posix/io/read with a 25% of probability to fail, and the failure point
libc/mm/malloc with a 5% of probability to fail:
fiu-ctrl -c 'enable_random name=posix/io/*,probability=0.25' \
-c 'enable_random name=libc/mm/*,probability=0.05' 12345
And the following will tell the same process to disable the previously enabled failure
point posix/io/read:
fiu-ctrl -c 'disable name=posix/io/read' 12345
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