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NetBSD 6.1.5 - man page for pcap_dump_open (netbsd section 3)

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PCAP_DUMP_OPEN(3)								PCAP_DUMP_OPEN(3)

NAME
       pcap_dump_open, pcap_dump_fopen - open a file to which to write packets

SYNOPSIS
       #include <pcap/pcap.h>

       pcap_dumper_t *pcap_dump_open(pcap_t *p, const char *fname);
       pcap_dumper_t *pcap_dump_fopen(pcap_t *p, FILE *fp);

DESCRIPTION
       pcap_dump_open()  is  called to open a ``savefile'' for writing.  fname specifies the name
       of the file to open. The file will have the same format as those used  by  tcpdump(8)  and
       tcpslice(1).  The name "-" in a synonym for stdout.

       pcap_dump_fopen()  is  called  to  write data to an existing open stream fp.  Note that on
       Windows, that stream should be opened in binary mode.

       p is a capture or ``savefile'' handle returned by an earlier  call  to  pcap_create()  and
       activated  by  an  earlier  call  to  pcap_activate(),  or  returned by an earlier call to
       pcap_open_offline(), pcap_open_live(), or pcap_open_dead().  The link-layer type and snap-
       shot length from p are used as the link-layer type and snapshot length of the output file.

RETURN VALUES
       A   pointer   to   a   pcap_dumper_t  structure	to  use  in  subsequent  pcap_dump()  and
       pcap_dump_close() calls is returned on success.	NULL is returned on failure.  If NULL  is
       returned, pcap_geterr(p) can be used to get the error text.

SEE ALSO
       pcap(3),   pcap_create(3),   pcap_activate(3),	pcap_open_offline(3),  pcap_open_live(3),
       pcap_open_dead(3), pcap_dump(3), pcap_dump_close(3), pcap_geterr(3), pcap-savefile(5)

					   5 April 2008 			PCAP_DUMP_OPEN(3)
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