|author||guy <guy>||2008-04-05 20:19:41 +0000|
|committer||guy <guy>||2008-04-05 20:19:41 +0000|
Split the pcap(3) man page into a bunch of individual man pages for
functions plus an overall man page for libpcap, and put them all into section 3PCAP. That means you can actually do "man pcap_open_live" and get something meaningful, rather than having to do "man pcap" and then scroll through all the other stuff in the man page.
Diffstat (limited to 'pcap_breakloop.3pcap')
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diff --git a/pcap_breakloop.3pcap b/pcap_breakloop.3pcap
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+.\" @(#) $Header: /tcpdump/master/libpcap/pcap_breakloop.3pcap,v 1.1 2008-04-05 20:19:41 guy Exp $
+.\" Copyright (c) 1994, 1996, 1997
+.\" The Regents of the University of California. All rights reserved.
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that: (1) source code distributions
+.\" retain the above copyright notice and this paragraph in its entirety, (2)
+.\" distributions including binary code include the above copyright notice and
+.\" this paragraph in its entirety in the documentation or other materials
+.\" provided with the distribution, and (3) all advertising materials mentioning
+.\" features or use of this software display the following acknowledgement:
+.\" ``This product includes software developed by the University of California,
+.\" Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
+.\" the University nor the names of its contributors may be used to endorse
+.\" or promote products derived from this software without specific prior
+.\" written permission.
+.\" THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
+.\" WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
+.\" MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+.TH PCAP_BREAKLOOP 3PCAP "4 April 2008"
+pcap_breakloop \- force a pcap_dispatch() or pcap_loop() call to return
+void pcap_breakloop(pcap_t *);
+sets a flag that will force
+to return rather than looping; they will return the number of packets
+that have been processed so far, or \-2 if no packets have been
+processed so far.
+This routine is safe to use inside a signal handler on UNIX or a console
+control handler on Windows, as it merely sets a flag that is checked
+within the loop.
+The flag is checked in loops reading packets from the OS - a signal by
+itself will not necessarily terminate those loops - as well as in loops
+processing a set of packets returned by the OS.
+Note that if you are catching signals on UNIX systems that support
+restarting system calls after a signal, and calling pcap_breakloop()
+in the signal handler, you must specify, when catching those signals,
+that system calls should NOT be restarted by that signal. Otherwise,
+if the signal interrupted a call reading packets in a live capture,
+when your signal handler returns after calling pcap_breakloop(), the
+call will be restarted, and the loop will not terminate until more
+packets arrive and the call completes.
+Note also that, in a multi-threaded application, if one thread is
+.BR pcap_dispatch() ,
+.BR pcap_loop() ,
+.BR pcap_next() ,
+.BR pcap_next_ex() ,
+a call to
+in a different thread will not unblock that thread; you will need to use
+whatever mechanism the OS provides for breaking a thread out of blocking
+calls in order to unblock the thread, such as thread cancellation in
+systems that support POSIX threads.
+will, on some platforms, loop reading packets from the OS; that loop
+will not necessarily be terminated by a signal, so
+should be used to terminate packet processing even if
+is being used.
+does not guarantee that no further packets will be processed by
+after it is called; at most one more packet might be processed.
+If \-2 is returned from
+.BR pcap_loop() ,
+the flag is cleared, so a subsequent call will resume reading packets.
+If a positive number is returned, the flag is not cleared, so a
+subsequent call will return \-2 and clear the flag.
+.SH SEE ALSO