grep output buffering issues causing premature truncation of logs

[LLeaves]

The grep command may also buffer its output, leading to premature truncation. This issue can be resolved by using the grep --line-buffered option.

subprocess.Popen(args="adb logcat --pid={} | grep --line-buffered seccomp > {}/{}_{}.log ".format(pid, dir_path, package_name, pid), stdin=None, stdout=None,stderr=None, shell=True)