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1 office 1 .\" Copyright (c) 1994, 1996, 1997
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14 .\" or promote products derived from this software without specific prior
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16 .\" THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
17 .\" WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
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20 .TH PCAP_FILENO 3PCAP "3 November 2009"
21 .SH NAME
22 pcap_fileno \- get the file descriptor for a live capture
23 .SH SYNOPSIS
24 .nf
25 .ft B
26 #include <pcap/pcap.h>
27 .ft
28 .LP
29 .ft B
30 int pcap_fileno(pcap_t *p);
31 .ft
32 .fi
33 .SH DESCRIPTION
34 If
35 .I p
36 refers to a network device that was opened for a live capture using
37 a combination of
38 .B pcap_create()
39 and
40 .BR pcap_activate() ,
41 or using
42 .BR pcap_open_live() ,
43 .B pcap_fileno()
44 returns the file descriptor from which captured packets are read.
45 .LP
46 If
47 .I p
48 refers to a ``savefile'' that was opened using functions such as
49 .BR pcap_open_offline()
50 or
51 .BR pcap_fopen_offline() ,
52 a ``dead''
53 .B pcap_t
54 opened using
55 .BR pcap_open_dead() ,
56 or a
57 .B pcap_t
58 that was created with
59 .B pcap_create()
60 but that has not yet been activated with
61 .BR pcap_activate() ,
62 it returns \-1.
63 .SH SEE ALSO
64 pcap(3PCAP), pcap_create(3PCAP), pcap_activate(3PCAP),
65 pcap_open_live(3PCAP), pcap_open_offline(3PCAP),
66 pcap_fopen_offline(3PCAP), pcap_open_dead(3PCAP)