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cpio.c 2.9 KB

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  1. /* vi: set sw=4 ts=4: */
  2. /*
  3. * Mini cpio implementation for busybox
  4. *
  5. * Copyright (C) 2001 by Glenn McGrath
  6. *
  7. * This program is free software; you can redistribute it and/or modify
  8. * it under the terms of the GNU General Public License as published by
  9. * the Free Software Foundation; either version 2 of the License, or
  10. * (at your option) any later version.
  11. *
  12. * This program is distributed in the hope that it will be useful,
  13. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  15. * General Public License for more details.
  16. *
  17. * You should have received a copy of the GNU General Public License
  18. * along with this program; if not, write to the Free Software
  19. * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  20. *
  21. * Limitations:
  22. * Doesn't check CRC's
  23. * Only supports new ASCII and CRC formats
  24. *
  25. */
  26. #include <fcntl.h>
  27. #include <stdlib.h>
  28. #include <string.h>
  29. #include <unistd.h>
  30. #include "unarchive.h"
  31. #include "busybox.h"
  32. #define CPIO_OPT_EXTRACT 0x01
  33. #define CPIO_OPT_TEST 0x02
  34. #define CPIO_OPT_UNCONDITIONAL 0x04
  35. #define CPIO_OPT_VERBOSE 0x08
  36. #define CPIO_OPT_FILE 0x10
  37. #define CPIO_OPT_CREATE_LEADING_DIR 0x20
  38. #define CPIO_OPT_PRESERVE_MTIME 0x40
  39. int cpio_main(int argc, char **argv)
  40. {
  41. archive_handle_t *archive_handle;
  42. char *cpio_filename = NULL;
  43. unsigned long opt;
  44. /* Initialise */
  45. archive_handle = init_handle();
  46. archive_handle->src_fd = STDIN_FILENO;
  47. archive_handle->seek = seek_by_char;
  48. archive_handle->flags = ARCHIVE_EXTRACT_NEWER | ARCHIVE_PRESERVE_DATE;
  49. opt = bb_getopt_ulflags(argc, argv, "ituvF:dm", &cpio_filename);
  50. /* One of either extract or test options must be given */
  51. if ((opt & (CPIO_OPT_TEST | CPIO_OPT_EXTRACT)) == 0) {
  52. bb_show_usage();
  53. }
  54. if (opt & CPIO_OPT_TEST) {
  55. /* if both extract and test options are given, ignore extract option */
  56. if (opt & CPIO_OPT_EXTRACT) {
  57. opt &= ~CPIO_OPT_EXTRACT;
  58. }
  59. archive_handle->action_header = header_list;
  60. }
  61. if (opt & CPIO_OPT_EXTRACT) {
  62. archive_handle->action_data = data_extract_all;
  63. }
  64. if (opt & CPIO_OPT_UNCONDITIONAL) {
  65. archive_handle->flags |= ARCHIVE_EXTRACT_UNCONDITIONAL;
  66. archive_handle->flags &= ~ARCHIVE_EXTRACT_NEWER;
  67. }
  68. if (opt & CPIO_OPT_VERBOSE) {
  69. if (archive_handle->action_header == header_list) {
  70. archive_handle->action_header = header_verbose_list;
  71. } else {
  72. archive_handle->action_header = header_list;
  73. }
  74. }
  75. if (cpio_filename) { /* CPIO_OPT_FILE */
  76. archive_handle->src_fd = bb_xopen(cpio_filename, O_RDONLY);
  77. archive_handle->seek = seek_by_jump;
  78. }
  79. if (opt & CPIO_OPT_CREATE_LEADING_DIR) {
  80. archive_handle->flags |= ARCHIVE_CREATE_LEADING_DIRS;
  81. }
  82. while (optind < argc) {
  83. archive_handle->filter = filter_accept_list;
  84. archive_handle->accept = llist_add_to(archive_handle->accept, argv[optind]);
  85. optind++;
  86. }
  87. while (get_header_cpio(archive_handle) == EXIT_SUCCESS);
  88. return(EXIT_SUCCESS);
  89. }