Programming :: How To Write Own Shell In Unix

Sep 16, 2010

I wish to create my own shell for my operating systems project in college...

My professor has asked me to make sure that my shell can execute at least 30 or 40 commands... I have around a month's time

I have seen endless source codes in the net, I'm not able to understand any of it

How do i get about doing it?

View 2 Replies


ADVERTISEMENT

Programming :: Invoking UNIX Shell Commands From HTML Webpage

May 11, 2010

I have a few questions regarding HTML, UNIX and Javascript. I've been tasked with creating a fairly simple webpage that takes a few inputs. Each input must correspond to an argument in a UNIX command running on a server.On a UNIX server we have a script (.ksh) that takes 3 arguments. The result of the script is a data file which is FTP'ed to an external server. Let's forget about the FTP portion for now. I would like to know where I should begin.What I know so far:

1) I will need HTML to create the webpage. Skill level is high
2) I will need Javascript to make my webpage more interactive. Skill level is high.
3) I will need to understand the UNIX environment. Skill level is high.

View 8 Replies View Related

Programming :: Write A Batch File For Windows That Starts Cygwin Tool And Runs Unix Scripts?

Nov 17, 2008

I need to write a batch file for windows that automatically starts the cygwin tool in windows and executes the unix scripts.Previously we had these scripts in unix server.Now we need to migrate them to Windows server.For this reason we are using cygwin tool that allows the scripts to be executed on Windows server.We had written a batch file that starts the cygwin tool,but we were not able to execute the unix scripts.How can we write a batch file such that it executes all the unix scripts in cygwin.

View 5 Replies View Related

Programming :: Writing Unix Shell Script To Pass File Name/path/creation Date?

Oct 7, 2009

I'm new to UNIX scripting; I�m stuck with the following I have an Oracle SQL script that takes three parameters

1- File Name
2- File Path
3- File creation date

Under UNIX I have a folder where files will be placed frequently and I need to upload those files to Oracle, what I need is a UNIX script that can do the following

Loop through Directory "/home/applmgr/snktmp"
Picks only files
Pass the file name to parameter &1

[code]....

Is the above possible? I already knows how to call the Oracle Script from UNIX Im only stuck on writing the UNIX part where it List the files attribute(name,path,date) and store them to parameters ,Looping until the last file in the directory If the above is not possible,then how can I create the below from the command line

Filename{concatenation Mark}filePath{concatenation Mark}creationdate
Filename{concatenation Mark}filePath{concatenation Mark}creationdate
Filename{concatenation Mark}filePath{concatenation Mark}creationdate
Filename{concatenation Mark}filePath{concatenation Mark}creationdate

View 4 Replies View Related

Programming :: How To Write A Toy Shell

Mar 24, 2011

I'm trying to write a toy linux shell. For starters this is what I'm trying to do:

1. Start a new process with fork.

2. Execute a program in the new process with execl().

3. Redirect the output from the new process from STDOUT to another file descriptor, using dup2(2).

4. In the parent process, read the output from the child process and write it to the screen.

Creating a new process and executing a program in it is no problems, the problem is that I can't seem to capture the output from it in the parent process.

Code:

//digenv
//C++arl 2011-03-24
#include <stdio.h>
#include <sys/types.h>

[code]...

View 14 Replies View Related

Programming :: Write A Function In A Shell Script?

Sep 22, 2010

I need a help regarding writing a function in a shell, what exactly a function does!!

View 3 Replies View Related

Programming :: Write Shell Script To Ssh Into A Remote Computer And Run That?

Jun 26, 2010

How do i write a shell script to ssh into a remote server with password and run a script in it?

View 2 Replies View Related

Programming :: Write Shell Script For Copy Files?

Mar 25, 2010

write shell script for copy files to usbdsk that cosist of very long argument like "2009025_efkl".

View 1 Replies View Related

Programming :: Write A Shell Script To Set Security Policies?

Apr 13, 2011

I don't know how to write a shell script to set security policies for Linux to start. and how. I know that there are many security policies for Linux but do not know which one best suited to write a shell script.

View 5 Replies View Related

Programming :: Write Shell Script So That It Can Run As Service / Daemon

Mar 8, 2010

Am not sure of the best way to go about writing a script. All I need at the moment is to start a java http server program at startup.How should I write languagetool.sh so as to be able to stop the script execution?

View 10 Replies View Related

Programming :: Write A Shell Script Which Edits A Config File ?

Mar 1, 2011

Write some simple script?

Heres what Im trying to do:

-Qjackctl has a config file which is modified each time QjackCtl is shut down. This means that whatever preset is in use when QjackCtl closes is written into the QjackCtl config file as the DEFAULT PRESET, for the next time QjackCtl starts (or at least this is how I understand it).

-I want to edit a specific line in the QjackCtl.config file, which specifies the DEFAULT PRESET. Obviously its easy to do manually, but I want to do it using a shell script which runs automatically on StartUp so that QjackCtl starts every time with the same DEFAULT PRESET, NOT the last one used.

-Unfortunately Im not at my Linux system right now (which is KXStudio/Kubuntu), but I believe the QjackCtl.config line looks something like this: DEF_PRESET=alsa (where alsa is the name of the preset)

PRESET1=alsa
PRESET2=firewire

I want a shell script which changes the line DEF_PRESET=alsa to DEF_PRESET=alsa, even when it may currently exist as DEF_PRESET=firewire due to occasions when firewire was the active preset when Qjackctl was last closed. I notice that the application in KDE that enables the user to set which applications open automatically on StartUp also allows the user to select shell scripts.

Ive done some research, as a beginner, and Im led to believe I might need to use AWK and/or CHMOD. I could have a go at writing a shell script but Im always wary about experimenting with StartUp scripts/operations because obviously if I get it wrong and make my system unusable, then because its going to run first thing on each boot, Id have great difficulty disabling it.

View 3 Replies View Related

Programming :: Write A Replacement For Shell Command Line Interpreter?

Sep 2, 2010

If say, I want to read the input given by user at the command prompt and write a code to execute the cmd given then which commands do i use to implement this ( Im writing the code in C )?

View 8 Replies View Related

Programming :: Write A Shell Script Which Will Check A File Name In A Dir And Copy It?

Apr 2, 2010

I am a novice to the shell script. In my system from db server the log files are enerating with the name log1.txt,log2.txt..... It is capable of keeping 10 files at a time in dir called /db/sis/log1.txt. I want to copy the log1.txt to another directory when ever it generating by attaching the time stamp to it for the back-up purpose. this files will be there for a period of 24 hours. after that the back-up dir should be cleared and it start copying again the fresh file from the same dir.

View 3 Replies View Related

Programming :: Find / Write A Shell Script That Will Go Through A File Organized?

Jul 3, 2009

I am trying to find / write a shell script that will go through a file organized like this (but with thousands of lines)...

93,5.00,"contig00002",169,83,"jgi|Brafl1|100379|fgenesh2_pg.scaffold_359000019"
579,1.00,"contig00003",3,380,"jgi|Brafl1|114745|estExt_fgenesh2_pm.C_1200006"
450,5.00,"contig00007",2,352,"jgi|Brafl1|274326|estExt_GenewiseH_1.C_8420008"

...and check the region of each line between the second and third pipes (the 6-digit numbers) against the values in the first column of a separate text file in CSV format like this...

274326,"Wnt family of developmental regulators"
114745,"FOG: Hormone receptors"
100379,"Transcription factor tinman/NKX2-3, contains HOX domain"

...and when they match, replace the value to the right of the third pipe (e.g., fgenesh2_pg.sca...) with the value in the second column in the CSV file associated with that number.

View 4 Replies View Related

Programming :: Write A Shell Script For Submitting Multiple Jobs Sequentially

May 27, 2010

I want to write a shell script for submitting multiple jobs sequentially. For example,

#!/bin/bash
qsub job1.sh

# when job1.sh is done, run the next one

qsub job2.sh

how to make the shell script know that job1.sh is done and now I can run job2.sh?

View 4 Replies View Related

General :: Write A Shell Script Which Will Simultaneously Collect OS User Information And Write In An Individual Text Files?

Feb 17, 2010

I want to write a shell script which will simultaneously collect OS user information and write in an individual text files.Can anyone tell me the syntax of the script.N.B. The user name will be mentioned in an array within the shell script.

View 8 Replies View Related

Programming :: Write Shell Script That Adds An Extension ".new" To All The Files In A Direct?

May 28, 2010

How to Write a small shell script that adds an extension ".new" to all the files in a directory.

View 2 Replies View Related

General :: Write A Shell Script Instead Of Shell Function?

Apr 27, 2011

I would like know when it is necessary or advisable to write a shell script instead of shell function ?

View 3 Replies View Related

General :: Find The Tag Value In Xml File Through Unix Shell Script?

Nov 3, 2010

the below tag is in the xml file. Now i want to find and extract the value of application name test1 and test2 one by one in the unix shell script. how to do this

<application name="test1">
</application>
<application name="test2">

[code]...

View 2 Replies View Related

General :: How To Look At History File In Unix Shell For User?

May 28, 2010

How to Look at history file in unix shell for a user, find 5 most often used commands.

View 5 Replies View Related

General :: How To Visit URL Using Shell Script Or Unix Command

Aug 2, 2011

I want to visit a url but this shall be invoked by a shell script. Anyone let me know the command to hit a url in unix.

View 5 Replies View Related

General :: Unix - Making Shell Prompt Show Last Return Value

May 30, 2011

I'm currently on a Linux machine and the shell prompt is showing me the last return value and number of executed commands (picture included, with these numbers shown in purple).

My own computer doesn't have this, how can I configure it? I'm using Xubunto, if more details are needed let me know -- I'm not much of a Linux user (I don't know what's relevant here).

View 3 Replies View Related

Programming :: Unix Programming - Single Thread Server Can Support Exactly 2 Clients At Once

Sep 28, 2010

A simple TCP based chat server could allow users to use any TCP client (telnet, for example) to communicate with each other. For this question you should consider a single process, single thread server that can support exactly 2 clients at once, the server simply forwards whatever is sent from one client to the other (in both directions). Your server must not insist on any specific ordering of messages as soon as something is sent from one client it is immediately forwarded to the other client. As soon as either client terminates the connection the server can exit

View 4 Replies View Related

Programming :: Unix Programming - Single Process That Does Not Start Up Any Other Threads

Sep 28, 2010

i want a process that can operate as both a TCP echo server and a UDP echo server. The process can provide service to many clients at the same time, but involves a single process that does not start up any other threads.

View 3 Replies View Related

General :: Write A Script To Convert All DOS Style Backslashes To UNIX Style Slashes?

May 20, 2011

How do I write a script to convert all DOS style backslashes to UNIX style slashes in a list of files /

View 3 Replies View Related

General :: How To Write Own Shell

May 26, 2011

how to write own shell in linux?i want to know procedure of shell programming.

View 5 Replies View Related

Programming :: Shell Scripting / Create A Shell Script Similar To Ls?

Jun 5, 2011

I am trying to create a shell script similar to ls, but which only lists directories. I have the first half working (no argument version), but trying to make it accept an argument, I am failing. My logic is sound I think, but I'm missing something on the syntax.

Code:
if [ $# -eq 0 ] ; then
d=`pwd`
for i in * ; do
if test -d $d/$i ; then
echo "$i:"
code....

View 10 Replies View Related

General :: How To Write Korn Shell

Oct 14, 2010

I am new and start learning how to write korn shell, can you someone please translate the below command to common English? code...

View 1 Replies View Related

General :: Write A Shell Script?

Dec 11, 2010

write a shell script that allows only user 1 and user 2 to execute a program and only from terminal 01 and terminal 02

View 4 Replies View Related

Programming :: Bash-shell-like Less Functionality In The Python Shell?

Jun 25, 2010

Is there some type of functional way to read things in the Python shell interpreter similar to less or more in the bash (and other) command line shells?

Example:

Code:

>>> import subprocess
>>> help(subprocess)
...
[pages of stuff to read]
...

I'm hoping so as I hate scrolling and love how less works with simple keystrokes for page-up/page-down/searching etc.

View 4 Replies View Related







Copyrights 2005-15 www.BigResource.com, All rights reserved