1PCAP_DUMP_OPEN(3PCAP)                                    PCAP_DUMP_OPEN(3PCAP)
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NAME

6       pcap_dump_open, pcap_dump_fopen - open a file to which to write packets
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SYNOPSIS

9       #include <pcap/pcap.h>
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11       pcap_dumper_t *pcap_dump_open(pcap_t *p, const char *fname);
12       pcap_dumper_t *pcap_dump_fopen(pcap_t *p, FILE *fp);
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DESCRIPTION

15       pcap_dump_open()  is  called to open a ``savefile'' for writing.  fname
16       specifies the name of the file to open. The file  will  have  the  same
17       format  as those used by tcpdump(1) and tcpslice(1).  The name "-" in a
18       synonym for stdout.
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20       pcap_dump_fopen() is called to write data to an  existing  open  stream
21       fp.  Note that on Windows, that stream should be opened in binary mode.
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23       p  is  a  capture or ``savefile'' handle returned by an earlier call to
24       pcap_create() and activated by an earlier call to  pcap_activate(),  or
25       returned  by  an earlier call to pcap_open_offline(), pcap_open_live(),
26       or pcap_open_dead().  The link-layer type and snapshot  length  from  p
27       are used as the link-layer type and snapshot length of the output file.
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RETURN VALUES

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

36       pcap(3PCAP), pcap_create(3PCAP),  pcap_activate(3PCAP),  pcap_open_off‐
37       line(3PCAP),        pcap_open_live(3PCAP),       pcap_open_dead(3PCAP),
38       pcap_dump(3PCAP),  pcap_dump_close(3PCAP),  pcap_geterr(3PCAP),   pcap-
39       savefile(5)
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43                                 5 April 2008            PCAP_DUMP_OPEN(3PCAP)
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