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NetBSD 6.1.5 - man page for pcap_open_offline (netbsd section 3)

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       pcap_open_offline, pcap_fopen_offline - open a saved capture file for reading

       #include <pcap/pcap.h>

       char errbuf[PCAP_ERRBUF_SIZE];

       pcap_t *pcap_open_offline(const char *fname, char *errbuf);
       pcap_t *pcap_fopen_offline(FILE *fp, char *errbuf);

       pcap_open_offline() is called to open a ``savefile'' for reading.

       fname  specifies  the  name of the file to open. The file can have the pcap file format as
       described in pcap-savefile(5), which is the file format used  by,  among  other	programs,
       tcpdump(8)  and tcpslice(1), or can have the pcap-ng file format, although not all pcap-ng
       files can be read.  The name "-" in a synonym for stdin.

       Alternatively, you may call pcap_fopen_offline() to read dumped data from an existing open
       stream fp.  Note that on Windows, that stream should be opened in binary mode.

       pcap_open_offline()  and  pcap_fopen_offline()  return  a  pcap_t * on success and NULL on
       failure.  If NULL is returned, errbuf is filled in  with  an  appropriate  error  message.
       errbuf is assumed to be able to hold at least PCAP_ERRBUF_SIZE chars.

       pcap(3), pcap-savefile(5)

					   5 April 2008 		     PCAP_OPEN_OFFLINE(3)
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