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- .TH PCAP_DUMP_FTELL 3PCAP "29 September 2017"
- .SH NAME
- pcap_dump_ftell, pcap_dump_ftell64 \- get the current file offset for a savefile being written
- .SH SYNOPSIS
- .nf
- .ft B
- #include <pcap/pcap.h>
- .ft
- .LP
- .ft B
- long pcap_dump_ftell(pcap_dumper_t *p);
- .ft B
- int64_t pcap_dump_ftell64(pcap_dumper_t *p);
- .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.
- 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.
- .SH SEE ALSO
- pcap(3PCAP), pcap_dump_open(3PCAP), pcap_dump(3PCAP)
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