tools/testing/selftests/connector/proc_filter.c

Source file repositories/reference/linux-study-clean/tools/testing/selftests/connector/proc_filter.c

File Facts

System
Linux kernel
Corpus path
tools/testing/selftests/connector/proc_filter.c
Extension
.c
Size
7321 bytes
Lines
311
Domain
Support Tooling And Documentation
Bucket
tools
Inferred role
Support Tooling And Documentation: implementation source
Status
source implementation candidate

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

switch (event->what) {
		case PROC_EVENT_EXIT:
			Printf("Exit process %d (tgid %d) with code %d, signal %d\n",
			       event->event_data.exit.process_pid,
			       event->event_data.exit.process_tgid,
			       event->event_data.exit.exit_code,
			       event->event_data.exit.exit_signal);
			break;
		case PROC_EVENT_FORK:
			Printf("Fork process %d (tgid %d), parent %d (tgid %d)\n",
			       event->event_data.fork.child_pid,
			       event->event_data.fork.child_tgid,
			       event->event_data.fork.parent_pid,
			       event->event_data.fork.parent_tgid);
			break;
		case PROC_EVENT_EXEC:
			Printf("Exec process %d (tgid %d)\n",
			       event->event_data.exec.process_pid,
			       event->event_data.exec.process_tgid);
			break;
		case PROC_EVENT_UID:
			Printf("UID process %d (tgid %d) uid %d euid %d\n",
			       event->event_data.id.process_pid,
			       event->event_data.id.process_tgid,
			       event->event_data.id.r.ruid,
			       event->event_data.id.e.euid);
			break;
		case PROC_EVENT_GID:
			Printf("GID process %d (tgid %d) gid %d egid %d\n",
			       event->event_data.id.process_pid,
			       event->event_data.id.process_tgid,
			       event->event_data.id.r.rgid,
			       event->event_data.id.e.egid);
			break;
		case PROC_EVENT_SID:
			Printf("SID process %d (tgid %d)\n",
			       event->event_data.sid.process_pid,
			       event->event_data.sid.process_tgid);
			break;
		case PROC_EVENT_PTRACE:
			Printf("Ptrace process %d (tgid %d), Tracer %d (tgid %d)\n",
			       event->event_data.ptrace.process_pid,
			       event->event_data.ptrace.process_tgid,
			       event->event_data.ptrace.tracer_pid,
			       event->event_data.ptrace.tracer_tgid);
			break;
		case PROC_EVENT_COMM:
			Printf("Comm process %d (tgid %d) comm %s\n",
			       event->event_data.comm.process_pid,
			       event->event_data.comm.process_tgid,
			       event->event_data.comm.comm);
			break;
		case PROC_EVENT_COREDUMP:
			Printf("Coredump process %d (tgid %d) parent %d, (tgid %d)\n",
			       event->event_data.coredump.process_pid,
			       event->event_data.coredump.process_tgid,
			       event->event_data.coredump.parent_pid,
			       event->event_data.coredump.parent_tgid);
			break;
		default:
			break;
		}
	}
	return 0;
}

int handle_events(int epoll_fd, struct proc_event *pev)
{
	char buff[CONNECTOR_MAX_MSG_SIZE];
	struct epoll_event ev[MAX_EVENTS];
	int i, event_count = 0, err = 0;

	event_count = epoll_wait(epoll_fd, ev, MAX_EVENTS, -1);
	if (event_count < 0) {
		ret_errno = errno;
		if (ret_errno != EINTR)
			perror("epoll_wait failed");
		return -3;
	}
	for (i = 0; i < event_count; i++) {
		if (!(ev[i].events & EPOLLIN))
			continue;
		if (recv(ev[i].data.fd, buff, sizeof(buff), 0) == -1) {
			ret_errno = errno;
			perror("recv failed");
			return -3;
		}
		err = handle_packet(buff, ev[i].data.fd, pev);
		if (err < 0)
			return err;

Annotation

Implementation Notes