C++ (Cpp) intercept_syscall_result Examples

Example #1

File: linux-syscalls.c Project: barak/systrace

static int
linux_read(int fd)
{
	struct str_message msg;
	struct intercept_pid *icpid;

	const char *sysname;
	u_int16_t seqnr;
	pid_t pid;
	int code;

	if (read(fd, &msg, sizeof(msg)) != sizeof(msg))
		return (-1);

	icpid = linux_getpid(msg.msg_pid);
	if (icpid == NULL)
		return (-1);

	seqnr = msg.msg_seqnr;
	pid = msg.msg_pid;
	switch (msg.msg_type) {
	case SYSTR_MSG_ASK:
		code = msg.msg_data.msg_ask.code;
		sysname = linux_syscall_name(pid, code);

		intercept_syscall(fd, pid, seqnr, msg.msg_policy,

		    sysname, code, "linux",
		    (void *)msg.msg_data.msg_ask.args,
		    msg.msg_data.msg_ask.argsize);
		break;

	case SYSTR_MSG_RES:
		code = msg.msg_data.msg_ask.code;
		sysname = linux_syscall_name(pid, code);

		intercept_syscall_result(fd, pid, seqnr, msg.msg_policy,
		    sysname, code, "linux",
		    (void *)msg.msg_data.msg_ask.args,
		    msg.msg_data.msg_ask.argsize,
		    msg.msg_data.msg_ask.result,
		    msg.msg_data.msg_ask.rval);
		break;

	case SYSTR_MSG_UGID: {
		struct str_msg_ugid *msg_ugid = &msg.msg_data.msg_ugid;

		intercept_ugid(icpid, msg_ugid->uid, msg_ugid->uid);

		if (linux_answer(fd, pid, seqnr, 0, 0, 0, NULL) == -1)
			err(1, "%s:%d: answer", __func__, __LINE__);
		break;
	}
	case SYSTR_MSG_CHILD:
		intercept_child_info(msg.msg_pid, msg.msg_data.msg_child.new_pid);
		break;

#ifdef SYSTR_MSG_POLICYFREE
	case SYSTR_MSG_POLICYFREE:
		intercept_policy_free(msg.msg_policy);
		break;
#endif
	}
	return (0);
}

Example #2

File: openbsd-syscalls.c Project: bingos/bitrig

static int
obsd_read(int fd)
{
	struct str_message msg;
	struct intercept_pid *icpid;
	struct obsd_data *data;
	struct emulation *current;

	char name[SYSTR_EMULEN+1];
	const char *sysname;
	u_int16_t seqnr;
	pid_t pid;
	int code;

	if (read(fd, &msg, sizeof(msg)) != sizeof(msg))
		return (-1);

	icpid = obsd_getpid(msg.msg_pid);
	if (icpid == NULL)
		return (-1);
	data = icpid->data;

	current = data->current;
	
	seqnr = msg.msg_seqnr;
	pid = msg.msg_pid;
	switch (msg.msg_type) {
	case SYSTR_MSG_ASK:
		code = msg.msg_data.msg_ask.code;
		sysname = obsd_syscall_name(pid, code);

		intercept_syscall(fd, pid, seqnr, msg.msg_policy,
		    sysname, code, current->name,
		    (void *)msg.msg_data.msg_ask.args,
		    msg.msg_data.msg_ask.argsize);
		break;

	case SYSTR_MSG_RES:
		code = msg.msg_data.msg_ask.code;
		sysname = obsd_syscall_name(pid, code);

		/* Switch emulation around at the right time */
		if (data->commit != NULL) {
			current = obsd_switch_emulation(data);
		}

		intercept_syscall_result(fd, pid, seqnr, msg.msg_policy,
		    sysname, code, current->name,
		    (void *)msg.msg_data.msg_ask.args,
		    msg.msg_data.msg_ask.argsize,
		    msg.msg_data.msg_ask.result,
		    msg.msg_data.msg_ask.rval);
		break;

	case SYSTR_MSG_EMUL:
		memcpy(name, msg.msg_data.msg_emul.emul, SYSTR_EMULEN);
		name[SYSTR_EMULEN] = '\0';

		if (obsd_set_emulation(pid, name) == -1)
			errx(1, "%s:%d: set_emulation(%s)",
			    __func__, __LINE__, name);

		if (icpid->execve_code == -1) {
			icpid->execve_code = 0;

			/* A running attach fake a exec cb */
			current = obsd_switch_emulation(data);

			intercept_syscall_result(fd,
			    pid, seqnr, msg.msg_policy,
			    "execve", 0, current->name,
			    NULL, 0, 0, NULL);
			break;
		}

		if (obsd_answer(fd, pid, seqnr, 0, 0, 0, NULL) == -1)
			err(1, "%s:%d: answer", __func__, __LINE__);
		break;

	case SYSTR_MSG_UGID: {
		struct str_msg_ugid *msg_ugid;
		
		msg_ugid = &msg.msg_data.msg_ugid;

		intercept_ugid(icpid, msg_ugid->uid, msg_ugid->uid);

		if (obsd_answer(fd, pid, seqnr, 0, 0, 0, NULL) == -1)
			err(1, "%s:%d: answer", __func__, __LINE__);
		break;
	}
	case SYSTR_MSG_CHILD:
		intercept_child_info(msg.msg_pid,
		    msg.msg_data.msg_child.new_pid);
		break;
#ifdef SYSTR_MSG_EXECVE
	case SYSTR_MSG_EXECVE: {
		struct str_msg_execve *msg_execve = &msg.msg_data.msg_execve;
		
		intercept_newimage(fd, pid, msg.msg_policy, current->name,
		    msg_execve->path, NULL);

		if (obsd_answer(fd, pid, seqnr, 0, 0, 0, NULL) == -1)
			err(1, "%s:%d: answer", __func__, __LINE__);
		break;
	}
#endif

#ifdef SYSTR_MSG_POLICYFREE
	case SYSTR_MSG_POLICYFREE:
		intercept_policy_free(msg.msg_policy);
		break;
#endif
	}
	return (0);
}