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.\"Generated by db2man.xsl. Don't modify this, modify the source.
.de Sh \" Subsection
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.de Sp \" Vertical space (when we can't use .PP)
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.de Ip \" List item
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.IP "\\$1" \\$2
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.TH "SC_WAIT_FOR_EVENT" 3 "" "" "OpenSC API Reference"
.SH NAME
sc_wait_for_event \- Wait for an event on a smart card reader
.SH "SYNOPSIS"
.PP
.nf
#include <opensc\&.h>
int sc_wait_for_event(sc_reader_t *readers[], int slots[], size_t numslots,
unsigned int event_mask,
int *reader, unsigned int *event, int timeout);
.fi
.SH "DESCRIPTION"
.PP
This function blocks until an event occurs on any of the readers/slots specified\&. The \fIreaders\fR and \fIslots\fR fields list the readers and respective slots to be watched\&. \fInum_slots\fR holds the total number of slots passed\&. The \fIevent_mask\fR parameter specifies the types of events to wait for\&. This may be a combination of the following flags:
.TP
SC_EVENT_CARD_REMOVED
A card was removed from the reader/slot\&.
.TP
SC_EVENT_CARD_INSERTED
A card was inserted into the reader/slot\&.
.PP
On returning, the \fIreader\fR parameter holds the reader which generated an event, and \fIevent\fR holds the event flag, as in \fIevent_mask\fR\&.
.PP
The timeout parameter may be used to specify the maximum amount of time to wait for an event, in milliseconds\&. This may be set to \-1 to wait forever\&.
.SH "RETURN VALUE"
.PP
Returns 0 if successful, 1 if a timeout occurred, or a negative value in case of error\&.
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