Returns a numeric code indicating the current compression. This value is set by archive_read_open.
archive_compression_name
Returns a text description of the current compression suitable for display.
archive_errno
Returns a numeric error code (see errno(2)) indicating the reason for the most recent error return.
archive_error_string
Returns a textual error message suitable for display. The error message here is usually more specific than that obtained from passing the result of archive_errno to strerror(3).
archive_format
Returns a numeric code indicating the format of the current archive entry. This value is set by a successful call to archive_read_next_header. Note that it is common for this value to change from entry to entry. For example, a tar archive might have several entries that utilize GNU tar extensions and several entries that do not. These entries will have different format codes.
archive_format_name
A textual description of the format of the current entry.
archive_set_error
Sets the numeric error code and error description that will be returned by archive_errno and archive_error_string. This function should be used within I/O callbacks to set system-specific error codes and error descriptions. This function accepts a printf-like format string and arguments. However, you should be careful to use only the following printf format specifiers: "%c", "%d", "%jd", "%jo", "%ju", "%jx", "%ld", "%lo", "%lu", "%lx", "%o", "%u", "%s", "%x", "%%". Field-width specifiers and other printf features are not uniformly supported and should not be used.
