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Full Discussion: Need some help with a bash script
Homework and Emergencies Homework & Coursework Questions Need some help with a bash script Post 302990945 by Eggsy on Friday 3rd of February 2017 08:17:55 AM
Old 02-03-2017
Need some help with a bash script
Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted!

1. The problem statement, all variables and given/known data:

In the currenty directory are the following files: asprin, benz, burroughs, claremont, eddings, doms, gardner, lucas, martin, mckiernam,
pabst, pratchett, schlederer, tolkien, vollenbruch

Which of the files lead to a change of the variable k.
And how often are the following statements invoked:

1."read WORT"
2. "echo $WORT|grep s>/dev/null"
3. "echo $WORT|grep r>/dev/null"
4. "let k=$k+1"
5. "echo $k"

2. Relevant commands, code, scripts, algorithms:

Code:
myscript.sh
k=0
while read WORT
do
	echo $WORT|grep s>/dev/null || echo $WORT|grep r>/dev/null || let k=$k+1
done
echo $k

The script is started with the following line:

Code:
ls | /home/notroot/scripts/myscript.sh

3. The attempts at a solution (include all code and scripts):

If I understand the script correctly, k would be increased every time the script comes across a file that contains at least one S and at least one R. So the files Asprin, Burroughs and Schlederer would lead to an increment of the variable k.

As for how often the statements are invoked:
1. 15 times
2. 7 times
3. 3 times
4. 3 times
5. Once

Just wanna know whether I understood the script correctly.
Thanks in advance.

4. Complete Name of School (University), City (State), Country, Name of Professor, and Course Number (Link to Course):

University of Applied Sciences, Trier, Germany, Systemadministration

Note: Without school/professor/course information, you will be banned if you post here! You must complete the entire template (not just parts of it).
Last edited by Eggsy; 02-03-2017 at 10:34 AM.. Reason: Changed the solution attempt, changed filenames to lower case.
 

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LEARN ABOUT MINIX

zgrep

ZGREP(1)                                                      General Commands Manual                                                     ZGREP(1)

NAME

       zgrep - search possibly compressed files for a regular expression

SYNOPSIS

       zgrep [ grep_options ] [ -e ] pattern filename...

DESCRIPTION

       Zgrep  invokes  grep  on  compressed  or  gzipped  files.   These  grep  options  will  cause  zgrep  to  terminate  with  an  error  code:
       (-[drRzZ]|--di*|--exc*|--inc*|--rec*|--nu*).  All other options specified are passed directly to grep.  If no file is specified,  then  the
       standard input is decompressed if necessary and fed to grep.  Otherwise the given files are uncompressed if necessary and fed to grep.

       If the GREP environment variable is set, zgrep uses it as the grep program to be invoked.

EXIT CODE

       2 - An option that is not supported was specified.

AUTHOR

       Charles Levert (charles@comm.polymtl.ca)

SEE ALSO

       grep(1), gzexe(1), gzip(1), zdiff(1), zforce(1), zmore(1), znew(1)

                                                                                                                                          ZGREP(1)
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