PCAP_DUMP_FTELL(3) | Library Functions Manual | PCAP_DUMP_FTELL(3)

# 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(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.

# 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(3)

25 July 2018 |