mknod.c 1.3 KB

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  1. /* vi: set sw=4 ts=4: */
  2. /*
  3. * mknod implementation for busybox
  4. *
  5. * Copyright (C) 2003 Manuel Novoa III <mjn3@codepoet.org>
  6. *
  7. * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
  8. */
  9. /* BB_AUDIT SUSv3 N/A -- Matches GNU behavior. */
  10. #include <sys/sysmacros.h> // For makedev
  11. #include "libbb.h"
  12. #include "libcoreutils/coreutils.h"
  13. static const char modes_chars[] ALIGN1 = { 'p', 'c', 'u', 'b', 0, 1, 1, 2 };
  14. static const mode_t modes_cubp[] = { S_IFIFO, S_IFCHR, S_IFBLK };
  15. int mknod_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
  16. int mknod_main(int argc, char **argv)
  17. {
  18. mode_t mode;
  19. dev_t dev;
  20. const char *name;
  21. mode = getopt_mk_fifo_nod(argv);
  22. argv += optind;
  23. argc -= optind;
  24. if (argc >= 2) {
  25. name = strchr(modes_chars, argv[1][0]);
  26. if (name != NULL) {
  27. mode |= modes_cubp[(int)(name[4])];
  28. dev = 0;
  29. if (*name != 'p') {
  30. argc -= 2;
  31. if (argc == 2) {
  32. /* Autodetect what the system supports; these macros should
  33. * optimize out to two constants. */
  34. dev = makedev(xatoul_range(argv[2], 0, major(UINT_MAX)),
  35. xatoul_range(argv[3], 0, minor(UINT_MAX)));
  36. }
  37. }
  38. if (argc == 2) {
  39. name = *argv;
  40. if (mknod(name, mode, dev) == 0) {
  41. return EXIT_SUCCESS;
  42. }
  43. bb_simple_perror_msg_and_die(name);
  44. }
  45. }
  46. }
  47. bb_show_usage();
  48. }