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Top Forums UNIX for Beginners Questions & Answers Swapping content b/n two files Post 302985994 by RudiC on Friday 18th of November 2016 02:32:41 AM
Old 11-18-2016
Code:
{ read L11;                     # from file1 via stdin (fd 0)
  read L12;                     # same
  read L21 <&3;                 # from file2 via redirection (fd 3)
  read L22 <&3;                 # same

  echo $L11;                    # to stdout (fd 1)      (var comes from file1)
  echo $L22;                    # same                  (var comes from file2)
  echo $L21 >&4;                # to redir (fd 4)       (var comes from file2)
  echo $L12 >&4;                # same                  (var comes from file1)

} <file1 3<file2 4>TMP          # redirection for input and to "TMP" file

 

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SC_WARTS2PCAP(1)					    BSD General Commands Manual 					  SC_WARTS2PCAP(1)

NAME
sc_warts2pcap -- write packets included in warts object to a pcap file. SYNOPSIS
sc_warts2pcap [-o outfile] [-s sort] [file ...] DESCRIPTION
The sc_warts2pcap utility provides the ability to extract packets embedded in the tbit, sting, and sniff warts objects and write them to a pcap file, which can be read by tcpdump and wireshark. The options are as follows: -o outfile specifies the name of the output file. If no output file is specified, it will be written to the standard output, provided that it is not a tty. -o sort specifies how the pcap records (packets) are sorted before being written out. By default, no sorting is applied; the packets are grouped as they are in the warts file. If packet sorting is specified, the packets are written out in timestamp order. Note that this operation requires the packets to be read into memory to be sorted, so it will require a corresponding amount of memory to com- plete. EXAMPLES
The command: sc_warts2pcap -o output.pcap file1.warts file2.warts will read the packet objects from file1.warts, and then file2.warts, and write them to output.pcap. The command: gzcat file1.warts.gz | sc_warts2pcap -s packet >file1.pcap will read the contents of the uncompressed warts file supplied on stdin, sort the packets by their timestamp, and then write the output to file1.pcap. SEE ALSO
scamper(1), tcpdump(1) AUTHORS
sc_warts2pcap is written by Stephen Eichler and Matthew Luckie. BSD
October 15, 2010 BSD
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