src/include/pgtar.h

   1 /*-------------------------------------------------------------------------
   2  *
   3  * pgtar.h
   4  *        Functions for manipulating tarfile datastructures (src/port/tar.c)
   5  *
   6  *
   7  * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
   8  * Portions Copyright (c) 1994, Regents of the University of California
   9  *
  10  * src/include/pgtar.h
  11  *
  12  *-------------------------------------------------------------------------
  13  */
  14 #ifndef PG_TAR_H
  15 #define PG_TAR_H
  16
  17 #define         TAR_BLOCK_SIZE  512
  18
  19 enum tarError
  20 {
  21         TAR_OK = 0,
  22         TAR_NAME_TOO_LONG,
  23         TAR_SYMLINK_TOO_LONG
  24 };
  25
  26 extern enum tarError tarCreateHeader(char *h, const char *filename,
  27                                                                          const char *linktarget, pgoff_t size,
  28                                                                          mode_t mode, uid_t uid, gid_t gid,
  29                                                                          time_t mtime);
  30 extern uint64 read_tar_number(const char *s, int len);
  31 extern void print_tar_number(char *s, int len, uint64 val);
  32 extern int      tarChecksum(char *header);
  33
  34 /*
  35  * Compute the number of padding bytes required for an entry in a tar
  36  * archive. We must pad out to a multiple of TAR_BLOCK_SIZE. Since that's
  37  * a power of 2, we can use TYPEALIGN().
  38  */
  39 static inline size_t
  40 tarPaddingBytesRequired(size_t len)
  41 {
  42         return TYPEALIGN(TAR_BLOCK_SIZE, len) - len;
  43 }
  44
  45 #endif