3 January 2014
pcap_file - get the standard I/O stream for a savefile being read
FILE *pcap_file(pcap_t *p);
pcap_file() returns the standard I/O stream of the ‘‘savefile,’’ if a ‘‘savefile’’ was opened with pcap_open_offline(3PCAP) , or NULL, if a network device was opened with pcap_create(3PCAP) and pcap_activate(3PCAP) , or with pcap_open_live(3PCAP) .
Note that the Packet Capture library is usually built with large file support, so the standard I/O stream of the ‘‘savefile’’ might refer to a file larger than 2 gigabytes; applications that use pcap_file() should, if possible, use calls that support large files on the return value of pcap_file() or the value returned by fileno(3) when passed the return value of pcap_file().