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Man Pages


Manual Reference Pages  -  PCAP_DUMP_FOPEN (3)

NAME

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

CONTENTS

Synopsis
Description
Return Values
See Also

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(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)
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--> PCAP_DUMP_OPEN (3) 5 April 2008

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