pcap_dump_ftell(3) get the current file offset for a savefile being written

SYNOPSIS

#include <pcap/pcap.h>

long pcap_dump_ftell(pcap_dumper_t *p);

DESCRIPTION

pcap_dump_ftell() returns the current file position for the ``savefile'', representing the number of bytes written by pcap_dump_open() and pcap_dump(). -1 is returned on error.