ZIP_OPEN(3)

NAME
zip_open, zip_open_from_source - open zip archive

LIBRARY
libzip (-lzip)

SYNOPSIS
#include <zip.h>
zip_t *
zip_open(const char *path, int flags, int *errorp);
zip_t *
zip_open_from_source(zip_source_t *zs, int flags, zip_error_t *ze);

DESCRIPTION
The zip_open() function opens the zip archive specified by path and returns a pointer to a struct zip, used to manipulate the archive. The flags are specified by or'ing the following values, or 0 for none of them.

ZIP_CHECKCONS
    Perform additional stricter consistency checks on the archive, and error if they fail.

ZIP_CREATE
    Create the archive if it does not exist.

ZIP_EXCL
    Error if archive already exists.

ZIP_TRUNCATE
    If archive exists, ignore its current contents. In other words, handle it the same way as an empty archive.

ZIP_RDONLY
    Open archive in read-only mode.

If an error occurs and errorp is non-NULL, it will be set to the corresponding error code.

The zip_open_from_source() function opens a zip archive encapsulated by the zip_source zs using the provided flags. In case of error, the zip_error ze is filled in.

RETURN VALUES
Upon successful completion zip_open() and zip_open_from_source() return a struct zip pointer. Otherwise, NULL is returned and zip_open() sets *errorp to indicate the error, while zip_open_from(source) sets ze to indicate the error.

EXAMPLES
Here's an example of how you could report errors during zip_open:

        zip_t *za;
        int err;
        if ((za = zip_open(name, 0, &err)) == NULL) {
            zip_error_t error;
            zip_error_init_with_code(&error, err);
            fprintf(stderr, "%s: cannot open zip archive '%s': %s\n",
    	        progname, name, zip_error_strerror(&error));
            zip_error_fini(&error);
            return -1;
        }

ERRORS
The archive specified by path is opened unless:

[ZIP_ER_EXISTS]
    The file specified by path exists and ZIP_EXCL is set.

[ZIP_ER_INCONS]
    Inconsistencies were found in the file specified by path. This error is often caused by specifying ZIP_CHECKCONS but can also happen without it.

[ZIP_ER_INVAL]
    The path argument is NULL.

[ZIP_ER_MEMORY]
    Required memory could not be allocated.

[ZIP_ER_NOENT]
    The file specified by path does not exist and ZIP_CREATE is not set.

[ZIP_ER_NOZIP]
    The file specified by path is not a zip archive.

[ZIP_ER_OPEN]
    The file specified by path could not be opened.

[ZIP_ER_READ]
    A read error occurred; see errno for details.

[ZIP_ER_SEEK]
    The file specified by path does not allow seeks.
For newly created archives, zip_open() does not try to create the file; this is done when calling zip_close(3) and any errors, like missing write permissions, will be reported then.

SEE ALSO
libzip(3), zip_close(3), zip_error_strerror(3), zip_fdopen(3), zip_source(5)

HISTORY
zip_open() and zip_open_from_source() were added in libzip 1.0.

AUTHORS
-nosplit Dieter Baron <dillo@nih.at> and Thomas Klausner <wiz@gatalith.at>