Sponsored Content
Homework and Emergencies Homework & Coursework Questions New user needs help with bourne shell script Post 302939055 by luislozoya on Sunday 22nd of March 2015 12:24:56 AM
Old 03-22-2015
New user needs help with bourne shell script

This is my question, below the question is the template

Write and execute a Bourne shell script called homework that will

From within the script, create three background processes:
a) (2 points) one that saves a long listing of your hidden files to a file named hiddenlist
b) (2 points) one that saves a full listing of the status of your current running processes to a file named pstat
c) (2 points) one that stores only the count of the number of words from the file homework2 into a file named wordcount
d) (1 point) issue a command to wait for ALL three background processes to complete.
e) (1 point) give the user a message stating that the process are completed



1.There are no variables.

2. Relevant commands, code, script, alogrithems.
The relevant command would be cat to create files the | to join commands
for a I would need ls -la
for b I would need ps
for c I would need wc
for d I would need wait
for e I would need echo

3. Here is one of the many attempts I have made to solve this problem, I have many more but don't want
to flood the forum with my failed attempts.




Code:
cat > hiddenlist | ls -la > hiddenlist
cat > pstat | ps > pstat
cat > wordcount | wc homework2 > wordcount
wait

echo “Background Processes complete”


4. California State University Fullerton, Fullerton California USA Floyd Holiday CPSC253U

Last edited by Don Cragun; 03-22-2015 at 03:04 AM.. Reason: Add CODE and ICODE tags.
 

10 More Discussions You Might Find Interesting

1. UNIX for Advanced & Expert Users

Bourne shell script need help please ?

i have this assignment.. and i mad this script but there is something wrong with it.. if anyone can tell me.. watz going on... i would appreciate it.. tHnX in advance.. count=1 val=$2 op=$1 ans=0 if then if then while do ... (7 Replies)
Discussion started by: dezithug
7 Replies

2. Shell Programming and Scripting

bourne shell script

Hi all, Can somebody answer the following query Thanks, Srinivas A shell program that takes one or any number of file directory names as input; sorts the directories given as parameters jointly in the ascending or decending order of choice For EX : dips abc etc desc will sort the files... (2 Replies)
Discussion started by: psrinivas
2 Replies

3. UNIX for Dummies Questions & Answers

Bourne Shell Script

Hello, I'm throwing this out there as a novice to the Unix world...I've been working on a project that requires me to ouput (using the echo command) a list of names in a single column format, but the problem is the input is in row format followed by a blank space...If anyone could give me a... (2 Replies)
Discussion started by: dmhonor914
2 Replies

4. Shell Programming and Scripting

Trouble using substr function with Bourne shell script

Hi, I'm a newbie to UNIX scripting and I'm having some trouble compiling my script. I'm using the Bourne Shell and cannot seem to use the substr function correctly. I'm trying to extract the last two digits of a year that's stored in a variable based off of a condition. I've searched the... (4 Replies)
Discussion started by: E2004
4 Replies

5. Shell Programming and Scripting

cd from a Bourne Shell Script - Please Help

Dear Bourne Shell Expert, I am trying to change the current working directory from within a Bourne Shell script. Simply enough i thought ! As I am sure you are well aware, Inside the script i echo `pwd` and it seems ok, but the shell spawns another shell to execute this and as such, when my... (10 Replies)
Discussion started by: fawqati
10 Replies

6. Shell Programming and Scripting

Bourne: How to invoke an alias from within a shell script

Bourne: How to invoke an alias from within a shell script If I type in the alias in the command line, it runs If I insert that same alias into my shell script and run the shell script, the alias is not invoked. Help please. (2 Replies)
Discussion started by: techshots
2 Replies

7. Shell Programming and Scripting

Accepting user input in Bourne shell and using sed

He guys. Basically I want to make a script that can add, delete and view stuff in a external file called config.txt. I can open it up in Joe but im not sure how to read in the user input or using commands automatically in joe to edit, save then quit. Problem area below: 1) echo "Add... (1 Reply)
Discussion started by: Pits
1 Replies

8. Shell Programming and Scripting

Bourne script: Check for root and oracle user

I have 2 separate Bourne shell scripts with 2 questions in Sun O/S & UNIX environment. Question 1: One of the scripts is supposed to be executed by "root" user only but cannot be executed after user executes "su - oracle". How can I check in the script whether the current user is "root" user?... (8 Replies)
Discussion started by: totziens
8 Replies

9. Shell Programming and Scripting

help with bourne shell script

Attempting to write a script to eventually notify me via email for when there is packetloss across the backbone. I am looking for values greater than 0% in the mtr field. #!/bin/sh target=www.google.com date +"%D"_"%T" >> /home/rich/mtr.log echo "----------------------------------------" >>... (1 Reply)
Discussion started by: closedown
1 Replies

10. Shell Programming and Scripting

Open a file from within a Bourne shell Script

I am suppose to make a program that cuts the extension off of a file. It uses that .ext to decide which program needs to be used to open the file. This only finds the name of the program from a list of programs I made. My problem is when it has the name of the program it needs to use, how can I... (3 Replies)
Discussion started by: dordrix
3 Replies
SCRIPT(1)                                                          User Commands                                                         SCRIPT(1)

NAME
script - make typescript of terminal session SYNOPSIS
script [options] [file] DESCRIPTION
script makes a typescript of everything displayed on your terminal. It is useful for students who need a hardcopy record of an interactive session as proof of an assignment, as the typescript file can be printed out later with lpr(1). If the argument file is given, script saves the dialogue in this file. If no filename is given, the dialogue is saved in the file type- script. OPTIONS
-a, --append Append the output to file or to typescript, retaining the prior contents. -c, --command command Run the command rather than an interactive shell. This makes it easy for a script to capture the output of a program that behaves differently when its stdout is not a tty. -e, --return Return the exit code of the child process. Uses the same format as bash termination on signal termination exit code is 128+n. -f, --flush Flush output after each write. This is nice for telecooperation: one person does `mkfifo foo; script -f foo', and another can supervise real-time what is being done using `cat foo'. --force Allow the default output destination, i.e. the typescript file, to be a hard or symbolic link. The command will follow a symbolic link. -q, --quiet Be quiet (do not write start and done messages to standard output). -t[file], --timing[=file] Output timing data to standard error, or to file when given. This data contains two fields, separated by a space. The first field indicates how much time elapsed since the previous output. The second field indicates how many characters were output this time. This information can be used to replay typescripts with realistic typing and output delays. -V, --version Display version information and exit. -h, --help Display help text and exit. NOTES
The script ends when the forked shell exits (a control-D for the Bourne shell (sh(1)), and exit, logout or control-d (if ignoreeof is not set) for the C-shell, csh(1)). Certain interactive commands, such as vi(1), create garbage in the typescript file. script works best with commands that do not manipulate the screen, the results are meant to emulate a hardcopy terminal. It is not recommended to run script in non-interactive shells. The inner shell of script is always interactive, and this could lead to unexpected results. If you use script in the shell initialization file, you have to avoid entering an infinite loop. You can use for example the .profile file, which is read by login shells only: if test -t 0 ; then script exit fi You should also avoid use of script in command pipes, as script can read more input than you would expect. ENVIRONMENT
The following environment variable is utilized by script: SHELL If the variable SHELL exists, the shell forked by script will be that shell. If SHELL is not set, the Bourne shell is assumed. (Most shells set this variable automatically). SEE ALSO
csh(1) (for the history mechanism), scriptreplay(1) HISTORY
The script command appeared in 3.0BSD. BUGS
script places everything in the log file, including linefeeds and backspaces. This is not what the naive user expects. script is primarily designed for interactive terminal sessions. When stdin is not a terminal (for example: echo foo | script), then the session can hang, because the interactive shell within the script session misses EOF and script has no clue when to close the session. See the NOTES section for more information. AVAILABILITY
The script command is part of the util-linux package and is available from Linux Kernel Archive <https://www.kernel.org/pub/linux/utils /util-linux/>. util-linux June 2014 SCRIPT(1)
All times are GMT -4. The time now is 01:06 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy