Login or Register to Ask a Question and Join Our Community


Shell Programming and Scripting

Help with bash script.

Login to Discuss or Reply to this Discussion in Our Community

 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting Help with bash script.
# 1  
Old 02-15-2010
Help with bash script.
Hello all I am newbie to Linux. After hours of reading and trying to compile something myself I am just uterly frusterated.
I am looking for some help maybee someone who has bit of free time to maybee show me an example of how to create a bash script to suit my needs.

Requirements
Ability to create, edit display and remove playlist files.
Ability to create edit and automatically generate and update an mp3 database file.
Ability to copy and remove mp3 files and verify there are no duplicate files in a directory.
Ability to play individual songs or playlists sort of in a menu type

Not asking for you to do the work jsut maybee show me an example for each.. Thanks in advance
# 2  
Old 02-15-2010
Quote:
Originally Posted by m2dmhot
Hello all I am newbie to Linux. After hours of reading and trying to compile something myself I am just uterly frusterated.
I am looking for some help maybee someone who has bit of free time to maybee show me an example of how to create a bash script to suit my needs.

Requirements
Ability to create, edit display and remove playlist files.

Use redirection to send output to an M3U file.
Quote:
Ability to create edit and automatically generate and update an mp3 database file.

What is the format of the database file? What database program are you using?
Quote:

Ability to copy and remove mp3 files and verify there are no duplicate files in a directory.

Read the man pages for cp and rm
Quote:

Ability to play individual songs or playlists sort of in a menu type

What software are you using to play the files?
Quote:

Not asking for you to do the work jsut maybee show me an example for each.. Thanks in advance
# 3  
Old 02-15-2010
Code:
#!/bin/bash

PLAYLIST='/home/Fedora11'

function mk_playlist
{
AUDIOPATH='/home/Fedora11/MP3'

touch /home/Fedora11/playlist
touch /home/Fedora11/temporaryplaylist

find $AUDIOPATH -print -type f > /home/Fedora11/temporaryplaylist
grep -i 'mp3$' /home/Fedora11/temporaryplaylist > /home/Fedora11/playlist


rm /home/Fedora11/temporaryplaylist

echo Total files: `wc -l /home/Fedora11/playlist`
}

# Echo some help
if [ "$1" == "-h" -o "$1" == "--help" ]; then
echo "Usage: doze [OPTION]"
echo
echo "<minutes> Doze for <minutes> and start playing"
echo "-c | --create Create playlist w/o playing it"
echo "-h | --help Show this help"
echo
echo "W/o option playing starts immediately"
echo
exit 0
fi

# Just create playlist w/o playing it
if [ "$1" == "-c" -o "$1" == "--create" ]; then
mk_playlist
exit 0
fi

# Start playing immediately
if [ "$#" -ne 1 ]; then
if [ ! -f "$PLAYLIST" ]; then
mk_playlist
mplayer -shuffle -playlist $PLAYLIST
else
mplayer -shuffle -playlist $PLAYLIST
fi
else
# Or after a while
if [ ! -f "$PLAYLIST" ]; then
mk_playlist
TIME_IN_MINS=$(($1 * 60))
sleep $TIME_IN_MINS
mplayer -shuffle -playlist $PLAYLIST
else
TIME_IN_MINS=$(($1 * 60))
sleep $TIME_IN_MINS
mplayer -shuffle -playlist $PLAYLIST
fi
fi

Basically i have taken bit of pieces i have found from my book and reading..
Ultimately i want to create a menu that will allow me to select create playlist edit playlist adding and deleting mp3s. play playlist . Also check for duplicates .This tidbit on this script was added feature to play the playlist or generate one and add a snooze time
# 4  
Old 02-15-2010
Quote:
Code:
#!/bin/bash

PLAYLIST='/home/Fedora11'

function mk_playlist
{


That is not the standard syntax for defining a function.
Code:
mk_playlist()
{

Quote:
Code:
  AUDIOPATH='/home/Fedora11/MP3'


There is no need to quote a variable assignment unless there is literal whitespace or other special characters.

You have created a variable for the directory; why are you not using it?
Code:
AUDIOPATH=$PLAYLIST/MP3

You should never again have the literal '/home/Fedora11' in your script.
Quote:
Code:
  touch /home/Fedora11/playlist
  touch /home/Fedora11/temporaryplaylist


If you really need to create these files ahead of time, there is no need to use an external command (touch):
Code:
> "$PLAYLIST/playlist"
> "$PLAYLIST/temporaryplaylist"

Quote:
Code:
  find $AUDIOPATH -print -type f > /home/Fedora11/temporaryplaylist
  grep -i 'mp3$' /home/Fedora11/temporaryplaylist > /home/Fedora11/playlist


You don't need grep or a temporary file:
Code:
find "$AUDIOPATH" -type f -name '*.[Mm][Pp]3' > /home/Fedora11/playlist

Quote:
Code:
  rm /home/Fedora11/temporaryplaylist

  echo Total files: `wc -l /home/Fedora11/playlist`
}

# Echo some help
if [ "$1" == "-h" -o "$1" == "--help" ]; then
  echo "Usage: doze [OPTION]"
  echo
  echo "<minutes> Doze for <minutes> and start playing"
  echo "-c | --create Create playlist w/o playing it"
  echo "-h | --help Show this help"
  echo
  echo "W/o option playing starts immediately"
  echo
  exit 0
fi

# Just create playlist w/o playing it
if [ "$1" == "-c" -o "$1" == "--create" ]; then
  mk_playlist
  exit 0
fi

# Start playing immediately
if [ "$#" -ne 1 ]; then
  if [ ! -f "$PLAYLIST" ]; then
    mk_playlist
    mplayer -shuffle -playlist $PLAYLIST
  else
    mplayer -shuffle -playlist $PLAYLIST
  fi
else
  # Or after a while
  if [ ! -f "$PLAYLIST" ]; then
    mk_playlist
    TIME_IN_MINS=$(($1 * 60))
    sleep $TIME_IN_MINS
    mplayer -shuffle -playlist $PLAYLIST
  else
    TIME_IN_MINS=$(($1 * 60))
    sleep $TIME_IN_MINS
    mplayer -shuffle -playlist $PLAYLIST
  fi
fi


Now, what's your question?

What is not working in your script?
Last edited by cfajohnson; 02-15-2010 at 03:41 PM..
# 5  
Old 02-15-2010
Quote:
Originally Posted by cfajohnson

Please edit your post and remove the duplication and put the code, and only the code, in [code] tags.
Is the above not the way you request it???
# 6  
Old 02-15-2010
Quote:
Originally Posted by m2dmhot
Is the above not the way you request it???

It's fine, now, but you should indent your code.
# 7  
Old 02-15-2010
Ok im going line by line here with you..
i understand what you said about standard syntax for defining a function.
now.. My mp3 are stored in /home/Fedora11/MP3
You state there is no need to quote a variable assignment unless there is a literal white space or other special characters.
if you put

Code:
AUDIOPATH=$PLAYLIST/MP3

how does it know where the mp3 are???

then you state that if you really need to create these files ahead fo time there is no need to use external command touch. again your removing the directory listing. How does it know where the directories are??

Ill wait to you reply with this then ill jump down to the next
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. UNIX for Beginners Questions & Answers

In Bash shell - the ps -ef shows only the /bin/bash but the script name is not displayed

In Bash shell - the ps -ef shows only the /bin/bash but the script name is not displayed ? Is there any way to get the script names for the process command ? --- Post updated at 08:39 AM --- in KSH (Korn Shell), my command output shows the script names but when run in the Bash Shell... (3 Replies)
Discussion started by: i4ismail
3 Replies

2. Shell Programming and Scripting

How to block first bash script until second bash script script launches web server/site?

I'm new to utilities like socat and netcat and I'm not clear if they will do what I need. I have a "compileDeployStartWebServer.sh" script and a "StartBrowser.sh" script that are started by emacs/elisp at the same time in two different processes. I'm using Cygwin bash on Windows 10. My... (3 Replies)
Discussion started by: siegfried
3 Replies

3. Shell Programming and Scripting

Different behavior between bash shell and bash script for cmd

So I'm trying to pass certain json elements as env vars and use them later on in a script. Sample json: JSON='{ "Element1": "file-123456", "Element2": "Name, of, company written in, a very weird way", "Element3": "path/to/some/file.txt", }' (part of the) script: for s... (5 Replies)
Discussion started by: da1
5 Replies

4. Shell Programming and Scripting

Make a password protected bash script resist/refuse “bash -x” when the password is given

I want to give my long scripts to customer. The customer must not be able to read the scripts even if he has the password. The following command locks and unlocks the script but the set +x is simply ignored. The code: read -p 'Script: ' S && C=$S.crypt H='eval "$((dd if=$0 bs=1 skip=//|gpg... (7 Replies)
Discussion started by: frad
7 Replies

5. UNIX for Dummies Questions & Answers

Im new to bash scriping and i found this expression on a bash script what does this mean.

# check host value regex='^(||1|2|25)(\.(||1|2|25)){3}$' if ')" != "" ]; then if ]; then echo host $host not found exit 4 fi elif ]; then echo $host is an invalid host address exit 5 fi espeacailly the top regex part? ---------- Post updated at 06:58 PM ---------- Previous update was... (1 Reply)
Discussion started by: kevin298
1 Replies

6. Shell Programming and Scripting

Run bash script within a bash script

Hi everybody, Lets say, I have two bash scripts named down.sh and up.sh located in two different folders named ~/home/a/ and ~/home/b/ Now I want to write another bash script, located in ~/home/ which runs these other two scripts, so that I only have to execute this one comprehensive script... (1 Reply)
Discussion started by: NBurkhard
1 Replies

7. Shell Programming and Scripting

Bash Script: modify bash

Hey guys, i'm having trouble complete one of my bash scripts I'm hoping to --- 1. Modify bash so that then the user types "ls" the command that is executed is "ls -al" 2. Modify the point of entry in bash when the user accesses it, moving the initial location to /var I've somewhat done #2,... (9 Replies)
Discussion started by: LibRid
9 Replies

8. Shell Programming and Scripting

how to make your bash script run on a machine with csh and bash

hi, i have a script that runs on bash and would like to run it on a machine that has csh and bash. the default setting on that machine is csh. i dont want to change my code to run it with a csh shell. is there any way i can run the script (written in bash) on this machine? in other words is there... (3 Replies)
Discussion started by: npatwardhan
3 Replies

9. Shell Programming and Scripting

passing variable from bash to perl from bash script

Hi All, I need to pass a variable to perl script from bash script, where in perl i am using if condition. Here is the cmd what i am using in perl FROM_DATE="06/05/2008" TO_DATE="07/05/2008" "perl -ne ' print if ( $_ >="$FROM_DATE" && $_ <= "$TO_DATE" ) ' filename" filename has... (10 Replies)
Discussion started by: arsidh
10 Replies

10. Shell Programming and Scripting

Why generate "ash and bash" different output for same bash script?

Hi, For my bash script, terminal with bash is generate an OK output and program works right. already, terminal with ash have "line 48: syntax error: Bad substitution" output and program don't work. :confused: (0 Replies)
Discussion started by: s. murat
0 Replies
Login or Register to Ask a Question