CARDOS-TOOL(1)			  OpenSC Tools			  CARDOS-TOOL(1)



     .SH "NAME" cardos-tool - displays information about Card OS-based security
tokens or format them


     .SH "SYNOPSIS"

	  .HP 288u

	       cardos-tool		   [OPTIONS]



     .SH "DESCRIPTION"

		     .PP The cardos-tool utility is used to display information
about smart cards and similar security tokens based on Siemens Card/OS M4.



     .SH "OPTIONS"

		     .PP


		    .PP --format, -f

							    Format the card or
	 token.

			     .RE		     .PP --help, -h

								Print help
	     message on screen.

				 .RE			 .PP --info, -i

								    Display
		 information about the card or token.

				     .RE		     .PP --reader arg,
		 -r arg


						   Number of the reader to use.
		     By default, the first reader with a present card is used.
		     If arg is an ATR, the reader with a matching card will be
		     chosen.

								   .RE
					 .PP --startkey arg, -s arg


						  Specify startkey for format.

					     .RE		     .PP
			 --change-startkey arg, -S arg


						      Change Startkey with given
			     APDU command.

						 .RE			 .PP
			     --verbose, -v


							  Causes cardos-tool to
				 be more verbose. Specify this flag several
				 times to enable debug output in the opensc
				 library.

						     .RE		     .PP
				 --wait, -w


							      Causes cardos-tool
				     to wait for the token to be inserted into
				     reader.


							 .RE



					  .SH "AUTHORS"

							  .PP cardos-tool was
				     written by Andreas Jellinghaus
				     <aj@dungeon.inka.de>.



opensc				   08/10/2026			  CARDOS-TOOL(1)