how can i use a rlogin with out entered a password,
someone tell me about configure the next files
/.rhosts
/etc/hosts.equiv and /etc/hosts
but i not sure about that, or there are not enough
could you tell me how to do that? (3 Replies)
Hi all,
could any of you please help me on my problem..
we are doing FTP (one report out put) from one server to another server through unix shell script program.
Due to the network issues, some times FTP process is hanging.
So we planned to modify the existing program with the following... (2 Replies)
Hi All,
My requirement is if the record is starting with 0, then do some processing.
if starting with 1, some processing
else (not with 0 or 1 ) then do some other processing.
i tried the following
case "$test" in
/^0/) echo "starting with zero ;;
/^1/) echo " with one" ;;
*) echo... (2 Replies)
Hi All,
My requirement is if the record is starting with 0, then do some processing.
if starting with 1, some processing
else (not with 0 or 1 ) then do some other processing.
i tried the following
case "$test" in
/^0/) echo "starting with zero ;;
/^1/) echo " with one" ;;
*) echo... (3 Replies)
Hi all, i'm quite new in the UNIX world. So maybe i'm going to ask simple questions but they are unsolvable for me...
I'm trying to implement the 'more' function or kinda of that, for improving my knowledges. But I encountered some problems that i hope u will help me to solve.
The code i... (0 Replies)
Unix is something new for me, I trying learn about it now.
I have download the sun virtualbox software and install solaris 10 into it. It is is like wizard with step by step installation guideline. :)
NOw how can i implement mirroring(RAID) into the my new SunOS? can anyone give a briefly list... (14 Replies)
hi,
i am having three files which is having following data
file1:
field1 field2 field3
1 A B
2 C D
3 E F
file2:
4 G H
1 I J
5 K L
file3:
4 M N (3 Replies)
Hello, could anybody explain how the ps command works? I know something about the proc file system. But I'm still not sure about how it exactly works. Like ps without any option will print out the current user's processes, but it never displays my web browsers such as firefox or my LibreOffice... (3 Replies)
Discussion started by: freedombird9
3 Replies
LEARN ABOUT DEBIAN
fec
FEC(3) BSD Library Functions Manual FEC(3)NAME
fec_new, fec_encode, fec_encode, fec_free -- An erasure code in GF(2^m)
SYNOPSIS
#include <fec.h>
void *
fec_new(int k, int n);
void
fec_encode(void *code, void *data[], void *dst, int i, int sz);
int
fec_decode(void *code, void *data[], int i[], int sz);
void *
fec_free(void *code);
DESCRIPTION
This library implements a simple (n,k) erasure code based on Vandermonde matrices. The encoder takes k packets of size sz each, and is able
to produce up to n different encoded packets, numbered from 0 to n-1, such that any subset of k of them permits reconstruction of the origi-
nal data.
The data structures necessary for the encoding/decoding must first be created using calling fec_new() with the desired parameters. The code
descriptor returned by the function must be passed to other functions, and destroyed calling fec_free()
Allowed values for k and n depend on a compile-time value of GF_BITS and must be k <= n <= 2^GF_BITS. Best performance is achieved with
GF_BITS=8, although the code supports also GF_BITS=16.
Encoding is done by calling fec_encode() and passing it pointers to the code descriptor, the source and destination data packets, the index
of the packet to be produced, and the size of the packet.
fec_decode() with pointers to the code, received packets, indexes of received packets, and packet size. Decoding is done in place, possibly
shuffling the arrays passed as parameters. Decoding is deterministic as long as the received packets are different. The decoding procedure
does some limited testing on this and returns if parameters are invalid.
EXAMPLE
#include <fec.h>
/*
* example of sender code
*/
void *code ;
int n, k ;
void *src[] ;
void *pkt ;
code = new_code (k, n );
for (i = 0 ; i < k ; i++ )
src[i] = .. pointer to i-th source packet ..
for (each packet to transmit) {
i = ... index of the packet ;
fec_encode(code, src, pkt, i, size) ;
.. use packet in pkt
}
fec_free(code) ;
/*
* example of receiver code
*/
void *code ;
int n, k ;
void *data[] ;
int *ix[] ;
code = new_code (k, n );
for (i = 0 ; i < k ; i++ ) {
... receive a new packet ...
data[i] = .. pointer to i-th source packet ..
ix[i] = .. index of i-th source packet ..
}
fec_decode(code, data, ix, size) ;
/*
* now data[] has pointers to the source packets
*/
Please direct bug reports to luigi@iet.unipi.it .
BSD July 15, 1998 BSD