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PCAP_FILENO(3) Library Functions Manual PCAP_FILENO(3) NAME pcap_fileno - get the file descriptor for a live capture SYNOPSIS #include <pcap/pcap.h> int pcap_fileno(pcap_t *p); DESCRIPTION If p refers to a network device that was opened for a live capture us- ing a combination of pcap_create(3) and pcap_activate(3), or using pcap_open_live(3), pcap_fileno() returns the file descriptor from which captured packets are read. If p refers to a ``savefile'' that was opened using functions such as pcap_open_offline(3) or pcap_fopen_offline(3), a ``dead'' pcap_t opened using pcap_open_dead(3), or a pcap_t that was created with pcap_cre- ate() but that has not yet been activated with pcap_activate(), it re- turns PCAP_ERROR. SEE ALSO pcap(3) 25 July 2018 PCAP_FILENO(3)