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NAME | SYNOPSIS | DESCRIPTION | RETURN VALUES | SEE ALSO | COLOPHON |
PCAP_DUMP_OPEN(3PCAP) PCAP_DUMP_OPEN(3PCAP)
pcap_dump_open, pcap_dump_fopen - open a file to which to write pack‐
ets
#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);
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.
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.
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)
This page is part of the libpcap (packet capture library) project.
Information about the project can be found at
⟨http://www.tcpdump.org/⟩. If you have a bug report for this manual
page, see ⟨http://www.tcpdump.org/#patches⟩. This page was obtained
from the project's upstream Git repository
⟨https://github.com/the-tcpdump-group/libpcap.git⟩ on 2017-07-05. If
you discover any rendering problems in this HTML version of the page,
or you believe there is a better or more up-to-date source for the
page, or you have corrections or improvements to the information in
this COLOPHON (which is not part of the original manual page), send a
mail to man-pages@man7.org
16 February 2015 PCAP_DUMP_OPEN(3PCAP)