OpenSC API Reference
sc_detect_card_presence
3
opensc
sc_detect_card_presence
Detect presence of smart card in a reader
Synopsis
#include <opensc.h>
int sc_detect_card_presence(sc_reader_t *reader, int slot_id);
Description
This function checks whether reader has a card present in
slot_id.
Return value
If an error occurred, the return value is a a negative OpenSC error code. If no card is present, 0
is returned. Otherwise, a positive value is returned, which is a combination of flags. The flag
SC_SLOT_CARD_PRESENT is always set. In addition, if the card was exchanged, the
SC_SLOT_CARD_CHANGED flag is set.