NAME¶

archive_clear_error, archive_compression, archive_compression_name, archive_copy_error, archive_errno, archive_error_string, archive_file_count, archive_format, archive_format_name, archive_set_error — libarchive utility functions

SYNOPSIS¶

#include <archive.h>

void
archive_clear_error(struct archive *);

int
archive_compression(struct archive *);

const char *
archive_compression_name(struct archive *);

void
archive_copy_error(struct archive *, struct archive *);

int
archive_errno(struct archive *);

const char *
archive_error_string(struct archive *);

int
archive_file_count(struct archive *);

int
archive_format(struct archive *);

const char *
archive_format_name(struct archive *);

void
archive_set_error(struct archive *, int error_code, const char *fmt, ...);

DESCRIPTION¶

These functions provide access to various information about the struct archive object used in the libarchive(3) library.

archive_clear_error()

Clears any error information left over from a previous call. Not generally used in client code.

archive_compression()

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_copy_error()

Copies error information from one archive to another.

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_file_count()

Returns a count of the number of files processed by this archive object. The count is incremented by calls to archive_write_header or archive_read_next_header.

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.

SEE ALSO¶

archive_read(3), archive_write(3), libarchive(3), printf(3)

HISTORY¶

The libarchive library first appeared in FreeBSD 5.3.

AUTHORS¶

The libarchive library was written by Tim Kientzle ⟨kientzle@acm.org⟩.