libzip API changes

This file describes changes in the libzip API and how to adapt your code for them.

You can define ZIP_DISABLE_DEPRECATED before including <zip.h> to hide prototypes for deprecated functions, to find out about functions that might be removed at some point.

Changed in libzip-1.0

new type zip_error_t

Error information is stored in the newly public type zip_error_t. Use this to access information about an error, instead of the deprecated functions that operated on two ints.

deprecated functions:

  • zip_error_get_sys_type()
  • zip_error_get()
  • zip_error_to_str()
  • zip_file_error_get()

See their man pages for instructions on how to replace them.

The most common affected use is zip_open. The new recommended usage is:

int err;
if ((za = zip_open(archive, flags, &err)) == NULL) {
	zip_error_t error;
	zip_error_init_with_code(&error, err);
	fprintf(stderr, "can't open zip archive '%s': %s\n", archive, zip_error_strerror(&error));

more typedefs

The following typedefs have been added for better readability:

typedef struct zip zip_t;
typedef struct zip_file zip_file_t;
typedef struct zip_source zip_source_t;
typedef struct zip_stat zip_stat_t;

This means you can use “zip_t” instead of “struct zip”, etc.

torrentzip support removed

torrentzip depends on a particular zlib version which is by now quite old.

Changed in libzip-0.11

new type zip_flags_t

The functions which have flags now use the zip_flags_t type for this. All old flags fit; you need only to adapt code if you were saving flags in a local variable. Use zip_flags_t for such a variable. This affects:

  • zip_fopen()
  • zip_fopen_encrypted()
  • zip_fopen_index()
  • zip_fopen_index_encrypted()
  • zip_get_archive_comment()
  • zip_get_archive_flag()
  • zip_get_num_entries()
  • zip_get_name()
  • zip_name_locate()
  • zip_set_archive_flag()
  • zip_source_zip()
  • zip_stat()
  • zip_stat_index()

ZIP_FL_*, ZIP_AFL_*, ZIP_STAT_* are now unsigned constants

To match the new zip_flags_t type.

zip_add(), zip_add_dir()

These functions were replaced with zip_file_add() and zip_dir_add(), respectively, to add a flags argument.

zip_rename(), zip_replace()

These functions were replaced with zip_file_rename() and zip_file_replace(), respectively, to add a flags argument.


This function was replaced with zip_file_get_comment(); one argument was promoted from int to zip_uint32_t, the other is now a zip_flags_t.


This function was replaced with zip_file_set_comment(); an argument was promoted from int to zip_uint16_t, and a zip_flags_t argument was added.

integer type size changes

Some argument and return values were not the right size or sign.


The return value was int, which can be too small. The function now returns zip_int64_t.


The return type is now signed, to allow signaling errors.


The last argument changed from int to zip_uint16_t.

extra field handling rewritten

The zip_get_file_extra() and zip_set_file_extra() functions were removed. They only worked on the whole extra field set.

Instead, you can now set, get, count, and delete each extra field separately, using the functions:

  • zip_file_extra_field_delete()
  • zip_file_extra_field_delete_by_id()
  • zip_file_extra_field_get()
  • zip_file_extra_field_get_by_id()
  • zip_file_extra_fields_count()
  • zip_file_extra_fields_count_by_id()
  • zip_file_extra_field_set()

Please read the corresponding man pages for details.

new functions


The new zip_discard() function closes an archive without committing the scheduled changes.


The new zip_set_file_compression() function allows setting compression levels for files.

argument changes

file names

File names arguments are now allowed to be NULL to have an empty file name. This mostly affects zip_file_add(), zip_dir_add(), and zip_file_rename().

For zip_get_name(), zip_file_get_comment(), and zip_get_archive_comment(), if the file name or comment is empty, a string of length 0 is returned. NULL is returned for errors only.

Previously, NULL was returned for empty/unset file names and comments and errors, leaving no way to differentiate between the two.