How to write program that find winner who choose the smallest number. UNIX process?
In the game of “Unique”, multiple players privately choose an integer. They then reveal
their choice. The winner is the player who chose the smallest unique number. The
game is considered a draw if no unique integer was chosen.
You would write a program that simulate such a game according to the followings
1. The parent process fork player (child) processes (up to maximum of 10
players). It then waits for each of the child processes to return an integer.
2. The players (child processes) will randomly pick an integer between 1 to 5, and
return the choices to the parent.
3. Parent process determines the winner based on the choice returned by the
players (child processes). Parent process then print out the winner’s PID and
inform all child processes to terminate, before it terminates. If it is a draw, parent
process shall inform all the child processes (players) to choose another integer.
4. Repeat steps 2 and 3 as many times as required until a winner can be
determined.
Example of output:
Code:
$ ./game 5
Game starts with 5 players
Player 3312 choose 4
Player 3314 choose 3
Player 3313 choose 2
Player 3315 choose 1
Player 3316 choose 5
Player 3315 win!
Please help me, to write a code because I am totally new in shell programming
Moderator's Comments:
Please use CODE tags as required by forum rules!
Last edited by RudiC; 06-04-2017 at 07:08 AM..
Reason: Added CODE tags.
Hi All,
My script is reading a log file line by line
log file is like ;
19:40:22 :INFO Total time taken to Service External Request---115ms
19:40:25 DEBUG : Batch processed libdaemon.x86_64 0-0.10-5.el5 - u
19:40:22 INFO Total time taken to Service External Request---20ms
19:40:24... (4 Replies)
Hey. This is pretty easy stuff but I'm learning the basics of Unix at the moment so keep that in mind. I have to:
1) Write a C-shell script to monitor user activity on the server for 13 minutes.
2) Then print the smallest and largest number of users during these 13 minutes.
I have this:
1)... (2 Replies)
Unix gurus,
I have a requirement wherein I want to find the port number for a given process id.
Is it possible? If so how?
TIA,
Regards,
Praveen (3 Replies)
Hi Experts, we do have a shell script for Unix Solaris, which will kill all the process manullay, it used to work in my previous env, but now it is throwing this error.. could some one please help me to resolve it
This is how we execute the script (and this is the requirement) ... (2 Replies)
Hi,
Anybody know how to print out the record that shown smallest number among column 3 and column 4
Case 1 Input :
37170 37196 77 51
37174 37195 73 52
37174 37194 73 53
Case 1 Output :
37170 37196 77 51
Case 2 Input :
469613 469660 73 ... (4 Replies)
FORK(2) BSD System Calls Manual FORK(2)NAME
fork -- create a new process
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <unistd.h>
pid_t
fork(void);
DESCRIPTION
fork() causes creation of a new process. The new process (child process) is an exact copy of the calling process (parent process) except for
the following:
o The child process has a unique process ID.
o The child process has a different parent process ID (i.e., 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 an lseek(2) on a descriptor in the
child process can affect a subsequent read(2) or write(2) 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 process' resource utilizations are set to 0; see setrlimit(2).
In general, the child process should call _exit(2) rather than exit(3). Otherwise, any stdio buffers that exist both in the parent and child
will be flushed twice. Similarly, _exit(2) should be used to prevent atexit(3) routines from being called twice (once in the parent and once
in the child).
In case of a threaded program, only the thread calling fork() is still running in the child processes.
Child processes of a threaded program have additional restrictions, a child must only call functions that are async-signal-safe. Very few
functions are asynchronously safe and applications should make sure they call exec(3) as soon as possible.
RETURN VALUES
Upon successful completion, fork() 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.
ERRORS
fork() will fail and no child process will be created if:
[EAGAIN] The system-imposed limit on the total number of processes under execution would be exceeded. This limit is configuration-depen-
dent.
[EAGAIN] The limit RLIMIT_NPROC on the total number of processes under execution by this user id would be exceeded.
[ENOMEM] There is insufficient swap space for the new process.
SEE ALSO execve(2), setrlimit(2), vfork(2), wait(2), pthread_atfork(3)STANDARDS
The fork() function conforms to ISO/IEC 9945-1:1990 (``POSIX.1'').
HISTORY
A fork() system call appeared in Version 6 AT&T UNIX.
BSD June 10, 2004 BSD
06-04-2017
