---
name: "sc_card_ctl"
section: "3"
platform: "linux"
package: "libopensc2-dev"
version: "0.11.13-1.1"
release: "Debian 6.0 (Squeeze)"
platforms: ["linux"]
url: "https://new.carta.tech/sc_card_ctl"
---

# sc\_card\_ctl(3)

Send a control command to a card

## NAME

sc\_card\_ctl - Send a control command to a card

## SYNOPSIS

```
#include <opensc.h>
int sc_card_ctl(struct sc_card *card, unsigned long cmd, void *args);
```

## DESCRIPTION

This function is used to send various control commands to the smart card associated with *card*. The command is specified in *cmd*, and any command-specific arguments are pointed to by *args*.

Commands are specific to cards. For more details on which cards accept which commands, check the documentation for your card.

## RETURN VALUE

Returns 0 if successful, or a negative value in case of error.