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1 office 1 .\" Copyright (c) 1994, 1996, 1997
2 .\" The Regents of the University of California. All rights reserved.
3 .\"
4 .\" Redistribution and use in source and binary forms, with or without
5 .\" modification, are permitted provided that: (1) source code distributions
6 .\" retain the above copyright notice and this paragraph in its entirety, (2)
7 .\" distributions including binary code include the above copyright notice and
8 .\" this paragraph in its entirety in the documentation or other materials
9 .\" provided with the distribution, and (3) all advertising materials mentioning
10 .\" features or use of this software display the following acknowledgement:
11 .\" ``This product includes software developed by the University of California,
12 .\" Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
13 .\" the University nor the names of its contributors may be used to endorse
14 .\" or promote products derived from this software without specific prior
15 .\" written permission.
16 .\" THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
17 .\" WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
18 .\" MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
19 .\"
20 .TH PCAP_FILE 3PCAP "5 April 2008"
21 .SH NAME
22 pcap_file \- get the standard I/O stream for a savefile being read
23 .SH SYNOPSIS
24 .nf
25 .ft B
26 #include <pcap/pcap.h>
27 .ft
28 .LP
29 .ft B
30 FILE *pcap_file(pcap_t *p);
31 .ft
32 .fi
33 .SH DESCRIPTION
34 .B pcap_file()
35 returns the standard I/O stream of the ``savefile,'' if a ``savefile''
36 was opened with
37 .BR pcap_open_offline() ,
38 or NULL, if a network device was opened with
39 .B pcap_create()
40 and
41 .BR pcap_activate() ,
42 or with
43 .BR pcap_open_live() .
44 .PP
45 Note that the Packet Capture library is usually built with large file
46 support, so the standard I/O stream of the ``savefile'' might refer to
47 a file larger than 2 gigabytes; applications that use
48 .B pcap_file()
49 should, if possible, use calls that support large files on the return
50 value of
51 .B pcap_file()
52 or the value returned by
53 .B fileno()
54 when passed the return value of
55 .BR pcap_file() .
56 .SH SEE ALSO
57 pcap(3PCAP), pcap_open_offline(3PCAP)