#include <iconv.h>
The iconv_close() function deallocates the conversion descriptor cd and all other associated resources allocated by the iconv_open(3C) function.
If a file descriptor is used to implement the type iconv_t, that file descriptor will be closed.
For examples using the iconv_close() function, see iconv(3C).
Upon successful completion, iconv_close() returns 0; otherwise, it returns -1 and sets errno to indicate the error.
The iconv_close() function may fail if:
See attributes(5) for descriptions of the following attributes:
iconv(3C), iconv_open(3C), attributes(5)