osx man page for pcap_lookupdev

PCAP_LOOKUPDEV(3PCAP)													     PCAP_LOOKUPDEV(3PCAP)

NAME
       pcap_lookupdev - find the default device on which to capture

SYNOPSIS
       #include <pcap/pcap.h>

       char errbuf[PCAP_ERRBUF_SIZE];

       char *pcap_lookupdev(char *errbuf);

DESCRIPTION
       pcap_lookupdev() returns a pointer to a string giving the name of a network device suitable for use with pcap_create() and pcap_activate(),
       or with pcap_open_live(), and with pcap_lookupnet().  If there is an error, NULL is returned and errbuf is filled in  with  an  appropriate
       error message.  errbuf is assumed to be able to hold at least PCAP_ERRBUF_SIZE chars.

SEE ALSO
       pcap(3PCAP), pcap_create(3PCAP), pcap_activate(3PCAP), pcap_open_live(3PCAP), pcap_lookupnet(3PCAP)

								   5 April 2008 					     PCAP_LOOKUPDEV(3PCAP)