bionic (3) pcap_dump_open.3pcap.gz

Provided by: libpcap0.8-dev_1.8.1-6ubuntu1.18.04.2_amd64 bug

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_open_append(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 "-" is  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 time stamp precision, link-layer type, and snapshot length from p are  used  as
       the link-layer type and snapshot length of the output file.

       pcap_dump_open_append()  is like pcap_dump_open but does not create the file if it does not exist and, if
       it does already exist, and is a pcap file with the same byte order as the host opening the file, and  has
       the  same  time  stamp  precision,  link-layer  header  type, and snapshot length as p, it will write new
       packets at the end of the 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)

                                                16 February 2015                           PCAP_DUMP_OPEN(3PCAP)