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20 .TH PCAP_DUMP_OPEN 3PCAP "5 April 2008"
22 pcap_dump_open, pcap_dump_fopen \- open a file to which to write packets
26 #include <pcap/pcap.h>
31 pcap_dumper_t *pcap_dump_open(pcap_t *p, const char *fname);
32 pcap_dumper_t *pcap_dump_open_append(pcap_t *p, const char *fname);
33 pcap_dumper_t *pcap_dump_fopen(pcap_t *p, FILE *fp);
38 is called to open a ``savefile'' for writing.
40 specifies the name of the file to open. The file will have
41 the same format as those used by
45 The name "-" is a synonym
50 is called to write data to an existing open stream
52 Note that on Windows, that stream should be opened in binary mode.
55 is a capture or ``savefile'' handle returned by an earlier call to
57 and activated by an earlier call to
59 or returned by an earlier call to
60 .BR pcap_open_offline() ,
61 .BR pcap_open_live() ,
63 .BR pcap_open_dead() .
64 The time stamp precision, link-layer type, and snapshot length from
66 are used as the link-layer type and snapshot length of the output file.
68 .B pcap_dump_open_append()
71 but does not create the file if it does not exist and, if it does
72 already exist, and is a pcap file with the same byte order as the host
73 opening the file, and has the same time stamp precision, link-layer
74 header type, and snapshot length as
76 it will write new packets at the end of the file.
80 structure to use in subsequent
84 calls is returned on success.
86 is returned on failure.
90 .B pcap_geterr(\fIp\fB)
91 can be used to get the error text.
93 pcap(3PCAP), pcap_create(3PCAP), pcap_activate(3PCAP),
94 pcap_open_offline(3PCAP), pcap_open_live(3PCAP), pcap_open_dead(3PCAP),
95 pcap_dump(3PCAP), pcap_dump_close(3PCAP), pcap_geterr(3PCAP),
96 pcap-savefile(@MAN_FILE_FORMATS@)