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Homework and Emergencies Homework & Coursework Questions File Looping - Looking for executable files - Need help Post 302521912 by Bob07 on Thursday 12th of May 2011 05:45:42 PM
Old 05-12-2011
File Looping - Looking for executable files - Need help

Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted!

Hello all, I have posted here before and really was blown away by the amount of assistance I received. I was able to finish my homework without a problem! But, yet again, our instructor has given us an assignment a lot of agreed was a bit too advanced for us. I'm in need of some help.

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

Create a shell script to loop through all the files and display

Sequence # Name Size Flag
========== ====================== ========= ==============

Flag should be "Yes" for executable files and "No" for non-executable files.
Image


2. Relevant commands, code, scripts, algorithms:
ls, grep, printf, while loop


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

Here's my sad attempt at it:

s=1

while [ $s -le 10 ]
do
printf "Sequence\n========\n%4d\n" $s
name=`cut -d" " -f1 RevFile | rev`
printf "Name\n===========\n%4s" $name

size=`ls -l | awk -F" " '{print $5}'`
printf "Size\n===========\n$4s" $size

printf "Flag\n==========\n"

let s++

done

WHAT WORKS:

The Sequence has no problem incrementing to the number I indicated. I set it up as a test because I knew the directory we were using contained hundreds of files and I wanted to keep it at a low number. File names are also showing up, but that's it, and even they are having problems lining up correctly under the "=======".

The "rev" command is in place because I actually had a file already set up with the directory in reverse so if I needed file names all I had to do was cut that first field, reverse that, and I had it. I'm sure there's an easier and better method out there, such as awk, but I've allowed frustration of not knowing what to do to get to me.

What is NOT working:

File size isn't showing up as intended and I don't have the flag portion set up. I need to get this thing straightened out first before I start working on the actual fields because right now it's printing as one whole single line and seperating into columns like the instructor is wanting us to do. I gotta be honest here, the guy HAS NOT covered enough material for us to be able to pull something like this off.

So basically I'd like to know what I should be doing in order to line the columns up the way they need to be. I'd be extremely grateful for any and all help!!!!

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

Baker College of Jackson, Jackson MI, U.S., Instructor S. Sadiq, LUX 211

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).
 

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RUN-PARTS(8)						      System Manager's Manual						      RUN-PARTS(8)

NAME
run-parts - run scripts or programs in a directory SYNOPSIS
run-parts [--test] [--verbose] [--report] [--lsbsysinit] [--regex=RE] [--umask=umask] [--arg=argument] [--exit-on-error] [--help] [--ver- sion] [--list] [--reverse] [--] DIRECTORY run-parts -V DESCRIPTION
run-parts runs all the executable files named within constraints described below, found in directory directory. Other files and directo- ries are silently ignored. If neither the --lsbsysinit option nor the --regex option is given then the names must consist entirely of ASCII upper- and lower-case let- ters, ASCII digits, ASCII underscores, and ASCII minus-hyphens. If the --lsbsysinit option is given, then the names must not end in .dpkg-old or .dpkg-dist or .dpkg-new or .dpkg-tmp, and must belong to one or more of the following namespaces: the LANANA-assigned namespace (^[a-z0-9]+$); the LSB hierarchical and reserved namespaces (^_?([a-z0-9_.]+-)+[a-z0-9]+$); and the Debian cron script namespace (^[a-zA-Z0-9_-]+$). If the --regex option is given, the names must match the custom extended regular expression specified as that option's argument. Files are run in the lexical sort order (according to the C/POSIX locale character collation rules) of their names unless the --reverse option is given, in which case they are run in the opposite order. OPTIONS
--test print the names of the scripts which would be run, but don't actually run them. --list print the names of the all matching files (not limited to executables), but don't actually run them. This option cannot be used with --test. -v, --verbose print the name of each script to stderr before running. --report similar to --verbose, but only prints the name of scripts which produce output. The script's name is printed to whichever of stdout or stderr the script first produces output on. --reverse reverse the scripts' execution order. --exit-on-error exit as soon as a script returns with a non-zero exit code. --lsbsysinit use LSB namespaces instead of classical behavior. --new-session run each script in a separate process session. If you use this option, killing run-parts will not kill the currently running script, it will run until completion. --regex=RE validate filenames against custom extended regular expression RE. See the EXAMPLES section for an example. -u, --umask=umask sets the umask to umask before running the scripts. umask should be specified in octal. By default the umask is set to 022. -a, --arg=argument pass argument to the scripts. Use --arg once for each argument you want passed. -- specifies that this is the end of the options. Any filename after -- will be not be interpreted as an option even if it starts with a hyphen. -h, --help display usage information and exit. -V, --version display version and copyright and exit. EXAMPLES
Print the names of all files in /etc that start with `p' and end with `d': run-parts --list --regex '^p.*d$' /etc COPYRIGHT
Copyright (C) 1994 Ian Jackson. Copyright (C) 1996 Jeff Noxon. Copyright (C) 1996, 1997, 1998 Guy Maor Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 Clint Adams run-parts is free software; see the GNU General Public License version 2 or later for copying conditions. There is no warranty. Debian 27 Jun 2012 RUN-PARTS(8)
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