PCAP_DUMP_FTELL(3PCAP) PCAP_DUMP_FTELL(3PCAP)

NAME

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

SYNOPSIS

#include <pcap/pcap.h>

long pcap_dump_ftell(pcap_dumper_t *p);
int64_t pcap_dump_ftell64(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(3PCAP) and pcap_dump(3PCAP). 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.

BACKWARD COMPATIBILITY

The function pcap_dump_ftell64() became available in libpcap release
1.9.0. In previous releases, there was no mechanism to obtain a file
offset that is too large to fit in a long.

SEE ALSO

pcap(3PCAP)

25 July 2018 PCAP_DUMP_FTELL(3PCAP)