archive_read_set_options(3) manual page

Manual Pages — ARCHIVE_READ_OPTIONS

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

LIBRARY

Streaming Archive Library (libarchive, -larchive)

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 specific 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 nothing 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. Otherwise, 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 cab
hdrcharset	The value is used as a character set name that will be used when translating file names.

Format cpio
compat-2x	Libarchive 2.x incorrectly encoded Unicode filenames on some platforms. This option mimics the libarchive 2.x filename handling so that such archives can be read correctly.
hdrcharset	The value is used as a character set name that will be used when translating file names.
pwb	When reading a binary CPIO archive, assume that it is in the original PWB cpio format, and handle file mode bits accordingly. The default is to assume v7 format.

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

Format lha
hdrcharset	The value is used as a character set name that will be used when translating file names.

Format mtree
checkfs	Allow reading information missing from the mtree from the file system. Disabled by default.

Format rar
hdrcharset	The value is used as a character set name that will be used when translating file names.

Format tar
compat-2x	Libarchive 2.x incorrectly encoded Unicode filenames on some platforms. This option mimics the libarchive 2.x filename handling so that such archives can be read correctly.
hdrcharset	The value is used as a character set name that will be used when translating file names.
mac-ext	Support Mac OS metadata extension that records data in special files beginning with a period and underscore. Defaults to enabled on Mac OS, disabled on other platforms. Use !mac-ext to disable.
read_concatenated_archives	Ignore zeroed blocks in the archive, which occurs when multiple tar archives have been concatenated together. Without this option, only the contents of the first concatenated archive would be read.

ERRORS

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

“	The number of UNIX installations has grown to 10, with more expected.	”
— UNIX Programming Manual, 1972