+static char *cpy_aliases( char ***tgtio, char *buf, char **src )
+{
+ int len;
+ char **tgt=*tgtio;
+ for( ; (*src) ; src++ ) {
+ len = strlen( *src ) + 1;
+ memcpy( buf, *src, len );
+ *tgt++=buf;
+ buf+=len;
+ }
+ *tgtio=tgt;
+ return buf;
+}
+
+static char *cpy_addresses( char ***tgtio, char *buf, char **src, int len )
+{
+ char **tgt=*tgtio;
+ for( ; (*src) ; src++ ) {
+ memcpy( buf, *src, len );
+ *tgt++=buf;
+ buf+=len;
+ }
+ *tgtio=tgt;
+ return buf;
+}
+
+static int copy_hostent( struct hostent *res, char **buf, struct hostent * src )
+{
+ char **p;
+ char **tp;
+ char *tbuf;
+ int name_len;
+ int n_alias;
+ int total_alias_len;
+ int n_addr;
+ int total_addr_len;
+ int total_len;
+
+ /* calculate the size needed for the buffer */
+ name_len = strlen( src->h_name ) + 1;
+
+ for( n_alias=total_alias_len=0, p=src->h_aliases; (*p) ; p++ ) {
+ total_alias_len += strlen( *p ) + 1;
+ n_alias++;
+ }
+
+ for( n_addr=0, p=src->h_addr_list; (*p) ; p++ ) {
+ n_addr++;
+ }
+ total_addr_len = n_addr * src->h_length;
+
+ total_len = (n_alias + n_addr + 2) * sizeof( char * ) +
+ total_addr_len + total_alias_len + name_len;
+
+ if (safe_realloc( buf, total_len )) {
+ tp = (char **) *buf;
+ tbuf = *buf + (n_alias + n_addr + 2) * sizeof( char * );
+ memcpy( res, src, sizeof( struct hostent ) );
+ /* first the name... */
+ memcpy( tbuf, src->h_name, name_len );
+ res->h_name = tbuf; tbuf+=name_len;
+ /* now the aliases */
+ res->h_aliases = tp;
+ tbuf = cpy_aliases( &tp, tbuf, src->h_aliases );
+ *tp++=NULL;
+ /* finally the addresses */
+ res->h_addr_list = tp;
+ tbuf = cpy_addresses( &tp, tbuf, src->h_addr_list, src->h_length );
+ *tp++=NULL;
+ return 0;
+ }