zip_open, zip_open_from_source — open zip archive

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

Debian                                           October 9, 2022                                     ZIP_OPEN(3)

       The  zip_open()  function  opens the zip archive specified by path and returns a pointer to a structzip,
       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.

       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.

       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;
           }

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

       libzip (-lzip)

       zip_open, zip_open_from_source — open zip archive

       Upon successful completion zip_open() and zip_open_from_source() return a structzip 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.

libzip(3), zip_close(3), zip_error_strerror(3), zip_fdopen(3)

#include<zip.h>zip_t*zip_open(constchar*path, intflags, int*errorp);

       zip_t*zip_open_from_source(zip_source_t*zs, intflags, zip_error_t*ze);