pg_backup_tar.h

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/*
 * src/bin/pg_dump/pg_backup_tar.h
 *
 * TAR Header (see "ustar interchange format" in POSIX 1003.1)
 *
 * Offset   Length   Contents
 *   0    100 bytes  File name ('\0' terminated, 99 maximum length)
 * 100      8 bytes  File mode (in octal ascii)
 * 108      8 bytes  User ID (in octal ascii)
 * 116      8 bytes  Group ID (in octal ascii)
 * 124     12 bytes  File size (in octal ascii)
 * 136     12 bytes  Modify time (Unix timestamp in octal ascii)
 * 148      8 bytes  Header checksum (in octal ascii)
 * 156      1 bytes  Type flag (see below)
 * 157    100 bytes  Linkname, if symlink ('\0' terminated, 99 maximum length)
 * 257      6 bytes  Magic ("ustar\0")
 * 263      2 bytes  Version ("00")
 * 265     32 bytes  User name ('\0' terminated, 31 maximum length)
 * 297     32 bytes  Group name ('\0' terminated, 31 maximum length)
 * 329      8 bytes  Major device ID (in octal ascii)
 * 337      8 bytes  Minor device ID (in octal ascii)
 * 345    155 bytes  File name prefix (not used in our implementation)
 * 500     12 bytes  Padding
 *
 * 512   (s+p)bytes  File contents, padded out to 512-byte boundary
 */

/* The type flag defines the type of file */
#define  LF_OLDNORMAL '\0'      /* Normal disk file, Unix compatible */
#define  LF_NORMAL    '0'       /* Normal disk file */
#define  LF_LINK      '1'       /* Link to previously dumped file */
#define  LF_SYMLINK   '2'       /* Symbolic link */
#define  LF_CHR       '3'       /* Character special file */
#define  LF_BLK       '4'       /* Block special file */
#define  LF_DIR       '5'       /* Directory */
#define  LF_FIFO      '6'       /* FIFO special file */
#define  LF_CONTIG    '7'       /* Contiguous file */