src/bin/pg_dump/pg_backup_tar.h

   1 /*
   2  * $PostgreSQL$
   3  *
   4  * TAR Header
   5  *
   6  * Offset       Length   Contents
   7  *       0        100 bytes  File name ('\0' terminated, 99 maximum length)
   8  * 100          8 bytes  File mode (in octal ascii)
   9  * 108          8 bytes  User ID (in octal ascii)
  10  * 116          8 bytes  Group ID (in octal ascii)
  11  * 124     12 bytes  File size (s) (in octal ascii)
  12  * 136     12 bytes  Modify time (in octal ascii)
  13  * 148          8 bytes  Header checksum (in octal ascii)
  14  * 156          1 bytes  Link flag
  15  * 157    100 bytes  Linkname ('\0' terminated, 99 maximum length)
  16  * 257          8 bytes  Magic ("ustar  \0")
  17  * 265     32 bytes  User name ('\0' terminated, 31 maximum length)
  18  * 297     32 bytes  Group name ('\0' terminated, 31 maximum length)
  19  * 329          8 bytes  Major device ID (in octal ascii)
  20  * 337          8 bytes  Minor device ID (in octal ascii)
  21  * 345    167 bytes  Padding
  22  * 512   (s+p)bytes  File contents (s+p) := (((s) + 511) & ~511), round up to 512 bytes
  23  */
  24
  25 /* The linkflag defines the type of file */
  26 #define  LF_OLDNORMAL '\0'              /* Normal disk file, Unix compatible */
  27 #define  LF_NORMAL        '0'           /* Normal disk file */
  28 #define  LF_LINK          '1'           /* Link to previously dumped file */
  29 #define  LF_SYMLINK   '2'               /* Symbolic link */
  30 #define  LF_CHR           '3'           /* Character special file */
  31 #define  LF_BLK           '4'           /* Block special file */
  32 #define  LF_DIR           '5'           /* Directory */
  33 #define  LF_FIFO          '6'           /* FIFO special file */
  34 #define  LF_CONTIG        '7'           /* Contiguous file */