daddytrap / lo-runner

Loco's program runner core, for online judge

Loco program runner core

We use this python-c library to run program in a sandbox-like environment. With it, we can accurately known the resource using of the program and limit its resource using including system-call interrupt.

Usage

For run a program without tracing:

runcfg = {
    'args':['./m'],
    'fd_in':fin.fileno(),
    'fd_out':ftemp.fileno(),
    'timelimit':1000, #in MS
    'memorylimit':20000, #in KB
}

rst = lorun.run(runcfg)

For check one output:

ftemp = file('temp.out')
fout = file(out_path)
crst = lorun.check(fout.fileno(), ftemp.fileno())

trace

You can set runcfg['trace'] to True to ensure runner's security.

Here is a simple usage:

runcfg['trace'] = True
runcfg['calls'] = [1, 2, 3, 4] # system calls that could be used by testing programs
runcfg['files'] = {'/etc/ld.so.cache': 0} # open flag permitted (value is the flags of open)