{ "help", no_argument, 0, CMD_HELP },
{ "version", no_argument, 0, CMD_VERSION },
{ "xid", required_argument, 0, 'x' },
+ { "set", no_argument, 0, 's' },
+ { "unset", no_argument, 0, 'u' },
{ "open", no_argument, 0, 'o' },
{ "create", no_argument, 0, 'c' },
{ "remap", no_argument, 0, 'r' },
WRITE_MSG(fd, "Usage: ");
WRITE_STR(fd, cmd);
WRITE_MSG(fd,
- " --xid <xid> [--flags <flags>] [--open] [--create] [--remap] [--device <dev>] [--target <dev>]\n"
+ " --xid <xid> {--set|--unset} [--flags <flags>] [--open] [--create]\n"
+ " [--device <dev>] [--remap --target <dev>]\n"
+ "\n"
+ " --flags <flags> Set the specified flags\n"
+ " --open Allow opening of the device\n"
+ " --create If CAP_MKNOD is given, allow mknod(2)\n"
+ " --device <dev> Device to apply the command to\n"
+ " --remap Remap the device to the target\n"
+ " --target <dev> Target for --remap\n"
+ "\n"
+ "EXAMPLES\n"
+ " Remap /dev/hda1 to /dev/vroot1 for xid 42\n"
+ " vdevmap --xid 42 --set --open --device /dev/hda1 --target /dev/vroot1 --remap\n"
+ " Let xid 42 create all device nodes\n"
+ " vdevmap --xid 42 --set --open --create --target /dev/null\n"
+ " vdevmap --xid 42 --set --open --create --target /dev/root\n"
+ " Let xid 43 create just /dev/null\n"
+ " vdevmap --xid 43 --set --open --create --device /dev/null\n"
"\n"
"Please report bugs to " PACKAGE_BUGREPORT "\n");
uint32_t flags = 0;
char *device = NULL;
char *target = NULL;
- long tmp = 0;
+ bool set = true;
+ unsigned long tmp = 0;
while (1) {
- int c = getopt_long(argc, argv, "+x:ocrf:d:t:", CMDLINE_OPTIONS, 0);
+ int c = getopt_long(argc, argv, "+x:suocrf:d:t:", CMDLINE_OPTIONS, 0);
if (c==-1) break;
switch (c) {
case 'r' : do_remap = true; break;
case 'd' : device = optarg; break;
case 't' : target = optarg; break;
+ case 's' : set = 1; break;
+ case 'u' : set = 0; break;
case 'f' :
if (!isNumberUnsigned(optarg, &tmp, false)) {
WRITE_MSG(2, "Invalid flags argument: '");
if (allow_create) flags |= VC_DATTR_CREATE;
if (do_remap) flags |= VC_DATTR_REMAP;
- if (xid==VC_NOCTX)
+ if (!target && do_remap)
+ WRITE_MSG(2, "Remapping specified without a target; try '--help' for more information\n");
+ else if (xid==VC_NOCTX)
WRITE_MSG(2, "No xid specified; try '--help' for more information\n");
else if (optind!=argc)
WRITE_MSG(2, "Unused argument(s); try '--help' for more information\n");
- else if (vc_set_mapping(xid, device, target, flags)==-1)
+ else if (!device && !target)
+ WRITE_MSG(2, "Device and target are missing; try '--help' for more information\n");
+ else if (set && vc_set_mapping(xid, device, target, flags)==-1)
perror("vc_set_mapping()");
+ else if (!set && vc_unset_mapping(xid, device, target, flags)==-1)
+ perror("vc_unset_mapping()");
else
return EXIT_SUCCESS;