zip_file_get_comment — get comment for file in zip

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

Debian                                         September 22, 2020                        ZIP_FILE_GET_COMMENT(3)

       The  zip_file_get_comment()  function  returns  the  comment  for  the  file at position index in the zip
       archive.  The name is in UTF-8 encoding unless ZIP_FL_ENC_RAW was specified (see  below).   This  pointer
       should  not  be  modified or free(3)'d, and becomes invalid when archive is closed.  If lenp is not NULL,
       the integer to which it points will  be  set  to  the  length  of  the  comment.   If  flags  is  set  to
       ZIP_FL_UNCHANGED, the original unchanged comment is returned.

       Additionally, the following flags are supported:

             ZIP_FL_ENC_RAW       Return the unmodified comment as it is in the ZIP archive.

             ZIP_FL_ENC_GUESS     (Default.)   Guess  the encoding of the comment in the ZIP archive and convert
                                  it to UTF-8, if necessary.  (Only CP-437 and UTF-8 are recognized.)

             ZIP_FL_ENC_STRICT    Follow the ZIP specification for file names and extend it  to  file  comments,
                                  expecting  them  to be encoded in CP-437 in the ZIP archive (except if it is a
                                  UTF-8 comment from the special extra field).  Convert it to UTF-8.
       Note: ASCII is a subset of both CP-437 and UTF-8.

zip_file_get_comment() fails if:

       [ZIP_ER_INVAL]     index is not a valid file index in archive.

zip_file_get_comment() was added in libzip 0.11.

       libzip (-lzip)

       zip_file_get_comment — get comment for file in zip

       Upon successful completion, a pointer to the comment is returned, or NULL if there  is  no  comment.   In
       case of an error, NULL is returned and the error code in archive is set to indicate the error.

libzip(3), zip_file_set_comment(3), zip_get_archive_comment(3)

#include<zip.h>constchar*zip_file_get_comment(zip_t*archive, zip_uint64_tindex, zip_uint32_t*lenp, zip_flags_tflags);