static int pnp_dock_event()

in pnpbios/core.c [86:134]

• 31 lines of code
• 4 McCabe index (conditional complexity)

static int pnp_dock_event(int dock, struct pnp_docking_station_info *info)
{
	static char const sbin_pnpbios[] = "/sbin/pnpbios";
	char *argv[3], **envp, *buf, *scratch;
	int i = 0, value;

	if (!(envp = kcalloc(20, sizeof(char *), GFP_KERNEL)))
		return -ENOMEM;
	if (!(buf = kzalloc(256, GFP_KERNEL))) {
		kfree(envp);
		return -ENOMEM;
	}

	/* FIXME: if there are actual users of this, it should be
	 * integrated into the driver core and use the usual infrastructure
	 * like sysfs and uevents
	 */
	argv[0] = (char *)sbin_pnpbios;
	argv[1] = "dock";
	argv[2] = NULL;

	/* minimal command environment */
	envp[i++] = "HOME=/";
	envp[i++] = "PATH=/sbin:/bin:/usr/sbin:/usr/bin";

#ifdef	DEBUG
	/* hint that policy agent should enter no-stdout debug mode */
	envp[i++] = "DEBUG=kernel";
#endif
	/* extensible set of named bus-specific parameters,
	 * supporting multiple driver selection algorithms.
	 */
	scratch = buf;

	/* action:  add, remove */
	envp[i++] = scratch;
	scratch += sprintf(scratch, "ACTION=%s", dock ? "add" : "remove") + 1;

	/* Report the ident for the dock */
	envp[i++] = scratch;
	scratch += sprintf(scratch, "DOCK=%x/%x/%x",
			   info->location_id, info->serial, info->capabilities);
	envp[i] = NULL;

	value = call_usermodehelper(sbin_pnpbios, argv, envp, UMH_WAIT_EXEC);
	kfree(buf);
	kfree(envp);
	return 0;
}