
ARCHIVE_READ_OPTIONS(3)  BSD Library Functions Manual  ARCHIVE_READ_OPTIONS(3)

NAME
     archive_read_set_filter_option, archive_read_set_format_option,
     archive_read_set_option, archive_read_set_options — functions controlling
     options for reading archives

SYNOPSIS
     int
     archive_read_set_filter_option(struct archive *, const char *module,
	 const char *option, const char *value);

     int
     archive_read_set_format_option(struct archive *, const char *module,
	 const char *option, const char *value);

     int
     archive_read_set_option(struct archive *, const char *module,
	 const char *option, const char *value);

     int
     archive_read_set_options(struct archive *, const char *options);

DESCRIPTION
     These functions provide a way for libarchive clients to configure spe‐
     cific read modules.

     archive_read_set_filter_option(), archive_read_set_format_option()
	     Specifies an option that will be passed to currently‐registered
	     filters (including decompression filters) or format readers.

	     If option and value are both NULL, these functions will do noth‐
	     ing and ARCHIVE_OK will be returned.  If option is NULL but value
	     is not, these functions will do nothing and ARCHIVE_FAILED will
	     be returned.

	     If module is not NULL, option and value will be provided to the
	     filter or reader named module.  The return value will be that of
	     the module.  If there is no such module, ARCHIVE_FAILED will be
	     returned.

	     If module is NULL, option and value will be provided to every
	     registered module.  If any module returns ARCHIVE_FATAL, this
	     value will be returned immediately.  Otherwise, ARCHIVE_OK will
	     be returned if any module accepts the option, and ARCHIVE_FAILED
	     in all other cases.

     archive_read_set_option()
	     Calls archive_read_set_format_option(), then
	     archive_read_set_filter_option().	If either function returns
	     ARCHIVE_FATAL, ARCHIVE_FATAL will be returned immediately.  Oth‐
	     erwise, greater of the two values will be returned.

     archive_read_set_options()
	     options is a comma‐separated list of options.  If options is NULL
	     or empty, ARCHIVE_OK will be returned immediately.

	     Calls archive_read_set_option() with each option in turn.	If any
	     archive_read_set_option() call returns ARCHIVE_FATAL,
	     ARCHIVE_FATAL will be returned immediately.

	     Individual options have one of the following forms:
	     option=value
		     The option/value pair will be provided to every module.
		     Modules that do not accept an option with this name will
		     ignore it.
	     option  The option will be provided to every module with a value
		     of “1”.
	     !option
		     The option will be provided to every module with a NULL
		     value.
	     module:option=value, module:option, module:!option
		     As above, but the corresponding option and value will be
		     provided only to modules whose name matches module.

OPTIONS
     Format iso9660
	     joliet  Support Joliet extensions.  Defaults to enabled, use
		     !joliet to disable.
	     rockridge
		     Support RockRidge extensions.  Defaults to enabled, use
		     !rockridge to disable.

ERRORS
     Detailed error codes and textual descriptions are available from the
     archive_errno() and archive_error_string() functions.

SEE ALSO
     tar(1), libarchive(3), archive_write_set_options(3), archive_read(3)

BSD				April 13, 2009				   BSD
