A way to disable corefile

[tesuji]

Sometimes bruteforcing generates a lot of corefiles. Doing os.system('rm -f core.*') is not ideal. It would be better if we have a way to disable generating corefiles. Maybe it could be an attribute on context.

[tesuji]

pwntools/pwnlib/context/__init__.py

Line 360 in 35da0c3

'delete_corefiles': False,

Does delete_corefiles=True disable corefiles?

[Arusekk]

No, delete_corefiles=True removes them after they have been used. You can use ulimit -H -c 0 to disable any core dump generation, but it will be permanent in your shell session. Or (ulimit -H -c 0; python exploit.py ...).

[tesuji]

So pwntools just copies corefiles, and it doesn't actively try to create/make corefiles. Could we have a configuration to disable this copying?

[peace-maker]

I'd expect this copying only to happen when you request the process' corefile in your script. If there's some automation happening, we can add an option to disable that of course, I'll have to check the code.

[peace-maker]

Adding another option to process to control coredump creation in the preexec_fn could work.

pwntools/pwnlib/tubes/process.py

Lines 439 to 443 in 299b3fa

	# Assume that the user would prefer to have core dumps.
	try:
	resource.setrlimit(resource.RLIMIT_CORE, (-1, -1))
	except Exception:
	pass