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PCAP_DUMP_OPEN(3PCAP)                                                                  PCAP_DUMP_OPEN(3PCAP)



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(1) 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 snapshot 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(3PCAP),        pcap_create(3PCAP),        pcap_activate(3PCAP),        pcap_open_offline(3PCAP),
       pcap_open_live(3PCAP),     pcap_open_dead(3PCAP),      pcap_dump(3PCAP),      pcap_dump_close(3PCAP),
       pcap_geterr(3PCAP), pcap-savefile(5@)



                                                5 April 2008                           PCAP_DUMP_OPEN(3PCAP)