(unlink_destination): New function, which checks for unlink failures.
(maybe_recoverable): Stay quiet if -U.
(extract_archive): Use O_EXCL if unlink_first_option.
Report unlink failures.
Use HAVE_SYMLINK, not S_ISLNK, to determine whether symlink exists.
Use HAVE_MKFIFO || defined mkfifo, not S_ISFIFO, to determine whether
mkfifo exists.
negative timestamps are handled correctly.
Replace invocations of xstrtol and xstrtoul with xstrtoumax, for
uniformity (and so that we don't need to have the other fns).
(main): Remove call to init_total_written; no longer needed.
permissions problems.
(open_archive): Fix wording on fatal error message.
Don't bother to stat /dev/null if the archive is not a character
special device.
MODE_OPTION, NEWER_MTIME_OPTION, NO_RECURSE_OPTION, NULL_OPTION,
OWNER_OPTION, POSIX_OPTION, PRESERVE_OPTION, RECORD_SIZE_OPTION,
RSH_COMMAND_OPTION, SUFFIX_OPTION, USE_COMPRESS_PROGRAM_OPTION,
VOLNO_FILE_OPTION, OBSOLETE_ABSOLUTE_NAMES, OBSOLETE_BLOCK_COMPRESS,
OBSOLETE_BLOCKING_FACTOR, OBSOLETE_BLOCK_NUMBER,
OBSOLETE_READ_FULL_RECORDS, OBSOLETE_TOUCH, OBSOLETE_VERSION_CONTROL):
Make sure they can't be valid chars, so they don't overlap with char codes.
Use an enum instead of a lot of #defines.
(long_options, main, usage): Remove --ending-file option.
(OPTION_STRING): Remove -E.
(ISODIGIT, ISSPACE): Remove; now in system.h.
(read_and): Excise ending_file_option.
(decode_header): No need to AND mode with 07777; MODE_FROM_OCT
does this now.
(from_oct): Cast ISSPACE arg to unsigned char.
(mode_from_oct): Translate modes from external to internal form.
Do not complain about unrecognized mode bits.
(decode_mode): Do not assume mode bits have traditional Unix values.
Do not assume mode bits have traditional Unix values.
(set_mode): Use %04 not %0.4 format.
(extract_sparse_file): Do not use data_block uninitialized.
Check for lseek failures; use portable lseek whence values.
have the same bit patterns.
(start_header): Do not assume mode bits have traditional Unix values.
(finish_sparse_file): Use lseek whence macros instead of integers.
(dump_file): Do not assume mode bits have traditional Unix values.
Do not invoke finish_sparse_file on a negative file descriptor.
