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SCF_Terminal_getCard(3SMARTCARD) Smartcard Library Functions SCF_Terminal_getCard(3SMARTCARD)
NAME
SCF_Terminal_getCard - establish a context with a smartcard
SYNOPSIS
cc [ flag... ] file... -lsmartcard [ library...]
#include <smartcard/scf.h>
SCF_Status_t SCF_Terminal_getCard(SCF_Terminal_t terminal, SCF_Card_t *card);
PARAMETERS
card A pointer to a SCF_Card_t. If the smartcard is successfully opened, a handle for the card will be returned through this
parameter.
terminal The terminal (from SCF_Session_getTerminal(3SMARTCARD)) containing a smartcard to open.
DESCRIPTION
The SCF_Terminal_getCard() function establishes a context with a specific smartcard in a terminal. Card objects can be used to send APDUs
(Application Protocol Data Units) to the card with SCF_Card_exchangeAPDU(3SMARTCARD). When the card is no longer needed,
SCF_Card_close(3SMARTCARD) should be called to release allocated resources.
If SCF_Terminal_getCard() is called multiple times in the same session to access the same physical card (while the card remains inserted),
the same SCF_Card_t will be returned in each call. The library cannot identifty specific cards, so when a card is reinserted it will be
represented by a new SCF_Card_t. Multithreaded applications must take care to avoid having one thread close a card that is still needed by
another thread. This can be accomplished by coordination within the application, or by having each thread open a separate session to avoid
interference.
RETURN VALUES
If a working card is present in the reader, SCF_STATUS_SUCCESS is returned and card is a valid reference to the card. Otherwise, an error
value is returned and card remains unaltered.
ERRORS
The SCF_Terminal_getCard() function will fail if:
SCF_STATUS_BADARGS The card argument is a null pointer.
SCF_STATUS_BADHANDLE The specified terminal has been closed or is invalid.
SCF_STATUS_FAILED An internal error occured.
SCF_STATUS_NOCARD No card is present in the terminal.
EXAMPLES
Example 1: Access a smartcard.
SCF_Status_t status;
SCF_Terminal_t myTerminal;
SCF_Card_t myCard;
/* (...call SCF_Session_getTerminal to open myTerminal...) */
status = SCF_Terminal_getCard(myTerminal, &myCard);
if (status == SCF_STATUS_NOCARD) {
printf("Please insert your smartcard and try again.
");
exit(0);
}
else if (status != SCF_STATUS_SUCCESS) exit(1);
/* (...go on to use the card with SCF_Card_exchangeAPDU()...) */
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Interface Stability |Evolving |
+-----------------------------+-----------------------------+
|MT-Level |MT-Safe |
+-----------------------------+-----------------------------+
SEE ALSO
libsmartcard(3LIB), SCF_Card_close(3SMARTCARD), SCF_Card_exchangeAPDU(3SMARTCARD), SCF_Card_getInfo(3SMARTCARD), SCF_Card_lock(3SMARTCARD),
SCF_Session_getTerminal(3SMARTCARD), attributes(5)
SunOS 5.10 28 Feb 2001 SCF_Terminal_getCard(3SMARTCARD)