pcap_dump_ftell.3pcap 2.13 KB
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.TH PCAP_DUMP_FTELL 3PCAP "29 September 2017"
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.SH NAME
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pcap_dump_ftell, pcap_dump_ftell64 \- get the current file offset for a savefile being written
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.SH SYNOPSIS
.nf
.ft B
#include <pcap/pcap.h>
.ft
.LP
.ft B
long pcap_dump_ftell(pcap_dumper_t *p);
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.ft B
int64_t pcap_dump_ftell64(pcap_dumper_t *p);
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.ft
.fi
.SH DESCRIPTION
.B pcap_dump_ftell()
returns the current file position for the ``savefile'', representing the
number of bytes written by
.B pcap_dump_open()
and
.BR pcap_dump() .
\-1 is returned on error.
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If the current file position does not fit in a
.BR long ,
it will be truncated; this can happen on 32-bit UNIX-like systems with
large file support and on Windows.
.B pcap_dump_ftell64()
returns the current file position in a
.BR int64_t ,
so if file offsets that don't fit in a
.B long
but that fit in a
.B int64_t
are supported, this will return the file offset without truncation.
\-1 is returned on error.
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.SH SEE ALSO
pcap(3PCAP), pcap_dump_open(3PCAP), pcap_dump(3PCAP)