Ok - I don't know C, but i know the groundwork to Perl - so here's one Perl solution:
Code:
#!/usr/bin/perl
print "\nHello Joe, how are you today? ";
chomp( $feelToday = <STDIN> );
print "\nI am happy you are $feelToday today.";
print "\nLet's do some math. What's your first number? ";
chomp( $firstNumber = <STDIN> );
print "\nWhat's your second number? ";
chomp( $secondNumber = <STDIN> );
$mathResult = $firstNumber + $secondNumber;
print "\nThe math result is $mathResult!\n\n";
Just put it in a script, make it executable and run it. Just make sure the first line points to the location of your Perl executable on your system!
Hello. I'm trying to write a shell script that will take files that have .tar, .tar.gz, .tar.Z, .gz, .Z and .zip file extensions and uncompress and unarchive them. The script should be able to take multiple arguments. So far I can write a script using the case command that will do this but it will... (3 Replies)
Can anyone create a program that
would test the math skills of the user. Assume that it would test integer addition, The program should ask the question,collect the integer response, evaluate and notify the user if their answer was correct or incorrect. I would assume integers in the range... (5 Replies)
Hi,
I am calling a program that greps and returns 72536 bytes of data on STDOUT, say about 7000 lines of data on STDOUT.
I use pipe from the program am calling the above program. Naturally, I execute the above program (through execl() ) throught the child process and try to read the... (4 Replies)
I'd like to write a program (I'm flexible on language; C/C++ was my original idea but a scripting language would probably be better) that runs hundreds of programs, but only N = 4 (say) at a time. The idea is to keep all the cores on a multicore machine busy.
How can I do this? In particular,... (6 Replies)
Hi,
The "program monitor" command in BT-Basic prompt you for a user name and a password.
How can I grant access only to certain users ?
Thank you. (0 Replies)
My auntie told me that she has been suspecting that her little kids are looking at some "illegal" sites online. She put a free web blocker on the computer, but they might be finding loopholes. She wanna install some child-control program to see what's going on. There are so many since I searched... (5 Replies)
I am a newbie to UNIX. I'm learning UNIX on my own, just trying to get the jerk of how things work in UNIX environment. I am familiar with Windows environment.
Can anyone pls write simple 'envprint' programs to :
1) List all the environment Information (using the -l or --l options)
2) ... (1 Reply)
I have this math program on Perl and when I run it one of the math problems that comes up is 0/0 and perl makes the answer 4. How can I program perl to not include numbers /0?
What I have for the division portion is:
$solution = $num1 * $num2;
($solution, $num1) = ($num1, $solution);
$question... (2 Replies)
Hello! I'd like some help with this assignment.
1. The problem statement, all variables and given/known data:
1)Write a shell script that can uses two types of files as inputs, apache.log and apache.error.log
2)Make it so that you can switch between the two file types
3)Make it so that the... (5 Replies)
Discussion started by: malfiory
5 Replies
LEARN ABOUT ULTRIX
fork
fork(2) System Calls Manual fork(2)Name
fork - create a new process
Syntax
#include <sys/types.h>
#include <unistd.h>
pid = fork()
pid_t pid;
Description
The system call causes creation of a new process. The new process (child process) is an exact copy of the calling process except for the
following:
o The child process has a unique process ID.
o The child process has a different parent process ID (that is, the process ID of the parent process).
o The child process has its own copy of the parent's descriptors. These descriptors reference the same underlying objects, so that, for
instance, file pointers in file objects are shared between the child and the parent, so that a on a descriptor in the child process
can affect a subsequent read or write by the parent. This descriptor copying is also used by the shell to establish standard input
and output for newly created processes as well as to set up pipes.
o The child processes resource utilizations are set to 0. For further information, see
Return Values
Upon successful completion, returns a value of 0 to the child process and returns the process ID of the child process to the parent
process. Otherwise, a value of -1 is returned to the parent process, no child process is created, and the global variable errno is set to
indicate the error.
Diagnostics
The system call fails and no child process are created under the following conditions:
[EAGAIN] The system-imposed limit {PROC_MAX} on the total number of processes under execution would be exceeded.
[EAGAIN] The system-imposed limit {CHILD_MAX} on the total number of processes under execution by a single user would be exceeded.
[ENOMEM] There is insufficient swap space for the new process.
See Alsoexecve(2), wait(2)fork(2)
10-20-2002
