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Full Discussion: Please help with the following fork code..with complete explanation
Homework and Emergencies Homework & Coursework Questions Please help with the following fork code..with complete explanation Post 302362915 by prakashabii on Sunday 18th of October 2009 05:44:47 PM
Old 10-18-2009
Java Please help with the following fork code..with complete explanation
I have the following piece of codes. Please explain it to me in great detail how are these codes working.

1. #include <stdio.h>
int main(){
int x;
x=0;
while (x<2 && fork()){
if (!fork()) execlp("echo","x++","x",0);
x++;
system("echo x+x");
}
}

2.

#include <stdio.h>
int i;
int main() {
for(i=0;i<2;i++){
if(fork())
fork();
}
printf ("%d\n", i);
system(("echo i++");
}


The attempts at a solution (include all code and scripts):[/B]
Output of 1:
x
x+x
x+x
x


Output of 2:
2
i++
2
i++
2
i++
2
i++
2
i++
2
i++
2
i++
2
2
i++
i++




Politechnico di Torino
Last edited by prakashabii; 10-18-2009 at 06:51 PM..
 

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LEARN ABOUT DEBIAN

massagevendor

MASSAGEVENDOR(8)					      System Manager's Manual						  MASSAGEVENDOR(8)

NAME

       massagevendor - convert the ethernet vendor codes master list to arpwatch format

SYNOPSIS

       massagevendor vendorfile

DESCRIPTION

       massagevendor is a program that converts a text file containing ethernet vendor codes into a format suitable for use by arpwatch(8) and
       arpsnmp(8).  The input vendorfile is a master text file containing vendor codes. The output is sent to stdout.  Each line of the vendorfile
       is expected to have a six digit hexadecimal vendor code followed by spaces followed by the name of the manufacturer.

       All ethernet devices have a unique identifier which includes a vendor code specifying the manufacturer of the device. In normal operation
       arpwatch(8) and arpsnmp(8) use the file ethercodes.dat to report this vendor code.  massagevendor is used to generate the ethercodes.dat
       file from text files containing these vendor codes.

       Locations where an ethernet vendor codes master text file can be obtained are given below.

FILES

       /usr/share/arpwatch - default location of the ethernet vendor list
       ethercodes.dat - file containing the list of ethernet vendor codes

SEE ALSO

       arpwatch(8), arpsnmp(8)

NOTES

       Sources for ethernet vendor codes seen in the wild are

	      http://map-ne.com/Ethernet/vendor.html
	      ftp://ftp.cavebear.com/pub/Ethernet.txt
	      http://www.cavebear.com/CaveBear/Ethernet/vendor.html

       Useful for comparison or completeness are the
       ethernet vendor codes as assigned
       by the IEEE which can be found at

	      http://standards.ieee.org/regauth/oui/oui.txt

BUGS

       Please send bug reports to arpwatch@ee.lbl.gov.

AUTHORS

       Craig Leres of the Lawrence Berkeley National Laboratory Network Research Group, University of California, Berkeley, CA.

       The current version is available via anonymous ftp:

	      ftp://ftp.ee.lbl.gov/arpwatch.tar.gz

       This manual page was contributed by Hugo Graumann.

																  MASSAGEVENDOR(8)
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