io_appendfile - open a file for appending

       io_appendfile  sets  d to the number of a new descriptor writing to the end of the disk file named s, and
       returns 1.  If the file does not exist, it will be created with mode 0600.

       If something goes wrong, io_appendfile sets errno to indicate the error,  and  returns  0;  it  does  not
       create a new descriptor, and it does not touch d.

       io_appendfile - open a file for appending

io_readfile(3), io_createfile(3), io_readwritefile(3)

                                                                                                io_appendfile(3)

#include<libowfat/io.h>

       int io_appendfile(int64* d,const char* s);