-c     Omit any characters that are invalid in the codeset of the input file from the output. When -c  is
       not  used,  the  results of encountering invalid characters in the input stream (either those that
       are not characters in the codeset of the input file or that have no corresponding character in the
       codeset  of  the  output  file)  shall  be  specified in the system documentation. The presence or
       absence of -c shall not affect the exit status of iconv.

-l     Write all supported fromcode and tocode values to standard output in an unspecified format.

-s     Suppress any messages written to standard error concerning invalid  characters.  When  -s  is  not
       used,  the  results  of encountering invalid characters in the input stream (either those that are
       not valid characters in the codeset of the input file or that have no corresponding  character  in
       the  codeset  of  the output file) shall be specified in the system documentation. The presence or
       absence of -s shall not affect the exit status of iconv.

-t  tocodeset
       Identify the codeset to be used for the  output  file.  The  implementation  shall  recognize  the
       following two forms of the tocodeset option-argument: