zip_file_set_comment — set comment for file in zip

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

Debian                                         September 22, 2020                        ZIP_FILE_SET_COMMENT(3)

       The zip_file_set_comment() function sets the comment for the file at position index in the zip archive to
       comment of length len.  If comment is NULL and len is 0, the file comment will  be  removed.   The  flags
       argument can be any of:

       ZIP_FL_ENC_GUESS      Guess encoding of comment (default).  (Only CP-437 and UTF-8 are recognized.)

       ZIP_FL_ENC_UTF_8      Interpret comment as UTF-8.

       ZIP_FL_ENC_CP437      Interpret comment as code page 437 (CP-437).

zip_file_set_comment() fails if:

       [ZIP_ER_INVAL]     index  is  not a valid file index in archive, or len is less than 0 or longer than the
                          maximum comment length in a zip file (65535), or comment is not a valid UTF-8  encoded
                          string.

       [ZIP_ER_MEMORY]    Required memory could not be allocated.

       [ZIP_ER_RDONLY]    The archive was opened in read-only mode.

zip_file_set_comment() was added in libzip 0.11.

       libzip (-lzip)

       zip_file_set_comment — set comment for file in zip

       Upon successful completion 0 is returned.  Otherwise, -1 is returned and the error information in archive
       is set to indicate the error.

libzip(3), zip_file_get_comment(3), zip_get_archive_comment(3), zip_set_archive_comment(3)

#include<zip.h>intzip_file_set_comment(zip_t*archive,   zip_uint64_tindex,  constchar*comment,  zip_uint16_tlen,
           zip_flags_tflags);