Updated: 2021/Apr/14

PCAP_DUMP_FTELL(3)         Library Functions Manual         PCAP_DUMP_FTELL(3)

       pcap_dump_ftell, pcap_dump_ftell64 - get the current file offset for a
       savefile being written

       #include <pcap/pcap.h>

       long pcap_dump_ftell(pcap_dumper_t *p);
       int64_t pcap_dump_ftell64(pcap_dumper_t *p);

       pcap_dump_ftell() returns the current file position for the
       ``savefile'', representing the number of bytes written by
       pcap_dump_open(3) and pcap_dump(3).  PCAP_ERROR is returned on error.
       If the current file position does not fit in a long, it will be
       truncated; this can happen on 32-bit UNIX-like systems with large file
       support and on Windows.  pcap_dump_ftell64() returns the current file
       position in a int64_t, so if file offsets that don't fit in a long but
       that fit in a int64_t are supported, this will return the file offset
       without truncation.  PCAP_ERROR is returned on error.


                                 25 July 2018               PCAP_DUMP_FTELL(3)