/filesystems/unixfs/ancientfs/ancientfs_tar.h

http://macfuse.googlecode.com/ · C Header · 85 lines · 65 code · 12 blank · 8 comment · 0 complexity · 170f8c6ef16eaf9eb67e5b36350f9221 MD5 · raw file 

    

  1. /*
    2. 

  2.  * Ancient UNIX File Systems for MacFUSE
    3. 

  3.  * Amit Singh
    4. 

  4.  * http://osxbook.com
    5. 

  5.  */
    6. 

  6. 

  7. #ifndef _ANCIENTFS_TAR_H_
    8. 

  8. #define _ANCIENTFS_TAR_H_
    9. 

  9. 

  10. #include "unixfs_internal.h"
    11. 

  11. #include "ancientfs.h"
    12. 

  12. 

  13. #define TBLOCK   512
    14. 

  14. #define NAMSIZ   100
    15. 

  15. 

  16. #define ROOTINO  1
    17. 

  17. 

  18. struct filsys
    19. 

  19. {
    20. 

  20.     uint32_t s_fsize;
    21. 

  21.     uint32_t s_files;
    22. 

  22.     uint32_t s_directories;
    23. 

  23.     uint32_t s_lastino;
    24. 

  24.     uint32_t s_dataoffset;
    25. 

  25.     struct inode* s_rootip;
    26. 

  26. };
    27. 

  27. 

  28. #define TMAGIC   "ustar" /* space terminated (pre POSIX) or null terminated */
    29. 

  29. #define TMAGLEN  6
    30. 

  30. #define TVERSION "00"    /* not null terminated */
    31. 

  31. #define TVERSLEN 2
    32. 

  32. 

  33. union hblock {
    34. 

  34.     char dummy[TBLOCK];
    35. 

  35.     struct header {
    36. 

  36.         char name[NAMSIZ];     /* name of file */
    37. 

  37.         char mode[8];          /* file mode */
    38. 

  38.         char uid[8];           /* owner user ID */
    39. 

  39.         char gid[8];           /* owner group ID */
    40. 

  40.         char size[12];         /* length of file in bytes; no trailing null */
    41. 

  41.         char mtime[12];        /* modfiy time of file; no trailing null */
    42. 

  42.         char chksum[8];        /* checksum for header */
    43. 

  43.         char typeflag;         /* called linkflag in pre-ustar headers */
    44. 

  44.         char linkname[NAMSIZ]; /* name of linked file */
    45. 

  45.         /* ustar below */
    46. 

  46.         char magic[6];         /* USTAR indicator */
    47. 

  47.         char version[2];       /* USTAR version; no trailing null */
    48. 

  48.         char uname[32];        /* owner user name */
    49. 

  49.         char gname[32];        /* owner group name */
    50. 

  50.         char devmajor[8];      /* device major number */
    51. 

  51.         char devminor[8];      /* device minor number */
    52. 

  52.         char prefix[155];      /* prefix for file name */
    53. 

  53.    } dbuf;
    54. 

  54. };
    55. 

  55. 

  56. /* values of typeflag / linkflag */
    57. 

  57. #define TARTYPE_REG  '0'       /* USTAR and old tar */
    58. 

  58. #define TARTYPE_LNK  '1'       /* USTAR and old tar */
    59. 

  59. #define TARTYPE_SYM  '2'       /* USTAR and old tar */
    60. 

  60. #define TARTYPE_CHR  '3'       /* USTAR */
    61. 

  61. #define TARTYPE_BLK  '4'       /* USTAR */
    62. 

  62. #define TARTYPE_DIR  '5'       /* USTAR */
    63. 

  63. #define TARTYPE_FIFO '6'       /* USTAR */
    64. 

  64. 

  65. struct tar_node_info {
    66. 

  66.     struct   inode*         ti_self;
    67. 

  67.     struct   tar_node_info* ti_parent;
    68. 

  68.     struct   tar_node_info* ti_children;
    69. 

  69.     struct   tar_node_info* ti_next_sibling;
    70. 

  70.     char*                   ti_name;
    71. 

  71.     char*                   ti_linktargetname;
    72. 

  72. };
    73. 

  73. 

  74. /* modes */
    75. 

  75. #define IALLOC  0100000 /* i-node is allocated */
    76. 

  76. #define ILARG   010000  /* large file */
    77. 

  77. #define IFMT    0170000 /* type of file */
    78. 

  78. 

  79. static inline mode_t
    80. 

  80. ancientfs_tar_mode(mode_t mode, uint32_t flags)
    81. 

  81. {
    82. 

  82.     return mode & (uint16_t)~(IALLOC & ILARG);
    83. 

  83. }
    84. 

  84. 

  85. #endif /* _ANCIENTFS_TAR_H_ */
    86.