ZIP_FOPEN(3) | Library Functions Manual | ZIP_FOPEN(3)

# NAME

`zip_fopen`, `zip_fopen_index` —
open file in zip archive for reading

# LIBRARY

libzip (-lzip)

# SYNOPSIS

`#include <zip.h>`

zip_file_t *
`zip_fopen`(zip_t *archive, const char *fname, zip_flags_t flags);

zip_file_t *
`zip_fopen_index`(zip_t *archive, zip_uint64_t index, zip_flags_t flags);

# DESCRIPTION

The `zip_fopen`() function opens the file name fname in archive. The flags argument specifies how the name lookup should be done, according to the values are described in zip_name_locate(3). Also, the following values may be or'ed to it.

`ZIP_FL_COMPRESSED`
  Read the compressed data. Otherwise the data is uncompressed by `zip_fread`().
`ZIP_FL_UNCHANGED`
  Read the original data from the zip archive, ignoring any changes made to the file; this is not supported by all data sources.

The `zip_fopen_index`() function opens the file at position index.

If encrypted data is encountered, the functions call zip_fopen_encrypted(3) or zip_fopen_index_encrypted(3) respectively, using the default password set with zip_set_default_password(3).

# RETURN VALUES

Upon successful completion, a struct zip_file pointer is returned. Otherwise, `NULL` is returned and the error code in archive is set to indicate the error.

# ERRORS

[`ZIP_ER_CHANGED`]
  The file data has been changed and the data source does not support rereading data.
[`ZIP_ER_COMPNOTSUPP`]
  The compression method used is not supported.
[`ZIP_ER_ENCRNOTSUPP`]
  The encryption method used is not supported.
[`ZIP_ER_MEMORY`]
  Required memory could not be allocated.
[`ZIP_ER_NOPASSWD`]
  The file is encrypted, but no password has been provided.
[`ZIP_ER_READ`]
  A file read error occurred.
[`ZIP_ER_SEEK`]
  A file seek error occurred.
[`ZIP_ER_WRONGPASSWD`]
  The provided password does not match the password used for encryption. Note that some incorrect passwords are not detected by the check done by `zip_fopen`().
[`ZIP_ER_ZLIB`]
  Initializing the zlib stream failed.

The function `zip_fopen`() may also fail and set zip_err for any of the errors specified for the routine zip_name_locate(3).

The function `zip_fopen_index`() may also fail with `ZIP_ER_INVAL` if index is invalid.

# SEE ALSO

libzip(3), zip_fclose(3), zip_fread(3), zip_fseek(3), zip_get_num_entries(3), zip_name_locate(3), zip_set_default_password(3)

# HISTORY

`zip_fopen`() and `zip_fopen_index`() were added in libzip 1.0.

# AUTHORS

Dieter Baron <dillo@nih.at> and Thomas Klausner <tk@giga.or.at>

December 18, 2017 | NiH