cat.c 1.5 KB

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  1. // SPDX-License-Identifier: GPL-2.0+
  2. /*
  3. * Copyright 2022
  4. * Roger Knecht <rknecht@pm.de>
  5. */
  6. #include <common.h>
  7. #include <command.h>
  8. #include <fs.h>
  9. #include <malloc.h>
  10. #include <mapmem.h>
  11. static int do_cat(struct cmd_tbl *cmdtp, int flag, int argc,
  12. char *const argv[])
  13. {
  14. char *ifname;
  15. char *dev;
  16. char *file;
  17. char *buffer;
  18. ulong file_size;
  19. int ret;
  20. if (argc < 4)
  21. return CMD_RET_USAGE;
  22. ifname = argv[1];
  23. dev = argv[2];
  24. file = argv[3];
  25. ret = fs_load_alloc(ifname, dev, file, 0, 0, (void **)&buffer,
  26. &file_size);
  27. // check file exists
  28. switch (ret) {
  29. case 0:
  30. break;
  31. case -ENOMEDIUM:
  32. return CMD_RET_FAILURE;
  33. case -ENOENT:
  34. log_err("File does not exist: ifname=%s dev=%s file=%s\n", ifname, dev, file);
  35. return CMD_RET_FAILURE;
  36. case -E2BIG:
  37. log_err("File is too large: ifname=%s dev=%s file=%s\n", ifname, dev, file);
  38. return CMD_RET_FAILURE;
  39. case -ENOMEM:
  40. log_err("Not enough memory: ifname=%s dev=%s file=%s\n", ifname, dev, file);
  41. return CMD_RET_FAILURE;
  42. default:
  43. case -EIO:
  44. log_err("File-read failed: ifname=%s dev=%s file=%s\n", ifname, dev, file);
  45. return CMD_RET_FAILURE;
  46. }
  47. // print file content
  48. buffer[file_size] = '\0';
  49. puts(buffer);
  50. free(buffer);
  51. return 0;
  52. }
  53. #ifdef CONFIG_SYS_LONGHELP
  54. static char cat_help_text[] =
  55. "<interface> <dev[:part]> <file>\n"
  56. " - Print file from 'dev' on 'interface' to standard output\n";
  57. #endif
  58. U_BOOT_CMD(cat, 4, 1, do_cat,
  59. "Print file to standard output",
  60. cat_help_text
  61. );