Nautilus Scripts Not Working (Fedora 12)

kwanbis · 01-04-2010, 12:18 PM

I'm trying to write some nautilus scripts.

I have a file (script) called fileType, on the scripts folder, that shows when i right click over a file, on the context menu, but it does nothing.

Code:

#!/bin/sh
for arg
do
filetype=$(file "$arg")
  gdialog --title "File-Type Determinator" --msgbox "File $filetype" 200 200
done

Now, i tried gdialog on terminal, and i get a command not found.

So, i changed gdialog --title "File-Type Determinator" --msgbox "File $filetype" 200 200 to echo "File $filetype" but i see nothing.

To test, i added at the end of the script the command "peazip", and peazip starts, so the script is running, but the echo/gdialog lines are not working, any ideas?

David1357 · 01-04-2010, 01:04 PM

Quote:

Originally Posted by kwanbis

any ideas?

To get it to work, I had to change the script to look like the following:

Code:

#!/bin/sh
for arg
do
    filetype=$(file "$arg")
    # Uncomment the following for debugging
    # echo "File $filetype"
    zenity --info --title="File-Type Determinator" --text="File $filetype" --width=200 --height=200
done

At one point, I got a message saying gdialog was just a wrapper around zenity, and that I should execute zenity directly.

kwanbis · 01-04-2010, 02:14 PM

Quote:

Originally Posted by David1357

To get it to work, I had to change the script to look like the following:
...
At one point, I got a message saying gdialog was just a wrapper around zenity, and that I should execute zenity directly.

Thanks, that worked.

What is NOT working, is the echo command, as in:

echo "File $filetype" (without the comments).

Does the echo goes to a log? or i'm not seeing it cause i'm running as a nautilus script?

David1357 · 01-04-2010, 02:18 PM

Quote:

Originally Posted by kwanbis

Does the echo goes to a log? or i'm not seeing it cause i'm running as a nautilus script?

You would only be able to see that output if you ran the script from a terminal window.

kwanbis · 01-04-2010, 02:21 PM

Thanks, you have been mostly helpful.

kwanbis · 01-05-2010, 10:16 AM

Ok, i finally got my script to work. Almost.

Code:

#!/bin/sh
for arg
do
	pathName=`echo $NAUTILUS_SCRIPT_CURRENT_URI | sed -e 's|file:///|/|' -e 's|//|/|' -e 's|%20| |'`
	fileName="$arg"
	fullName=$pathName/$fileName
	fileNoExt=${fileName%.*}
	fullFolder=$pathName/$fileNoExt
	# zenity --info --title="Executing..." --text="/usr/local/share/PeaZip/res/7z/7z x -o$fullFolder $fullName" --width=200 --height=200
	/usr/local/share/PeaZip/res/7z/7z x -o"$fullFolder" "$fullName"
	zenity --info --title="DONE Executing" --text="/usr/local/share/PeaZip/res/7z/7z x -o$fullFolder $fullName" --width=200 --height=200
done

Now, the problem is that 7z, executes hidden! I don't see it, i thought it would open a terminal like screen. But nothing.

What can it be? Can it be related to me not being able to see "echo XXX" messages also?

David1357 · 01-05-2010, 11:08 AM

Quote:

Originally Posted by kwanbis

Now, the problem is that 7z, executes hidden!

Why don't you use PeaZip instead of 7z? It has command line options like "-ext2here" that should give you the GUI. 7z is probably a command-line-only application that outputs text to stdout, which would only show up in a terminal.

I have put some questions inline with the code below.

Code:

#!/bin/sh
### Why not use /bin/bash?
for arg
do
	pathName=`echo $NAUTILUS_SCRIPT_CURRENT_URI | sed -e 's|file:///|/|' -e 's|//|/|' -e 's|%20| |'`
	fileName="$arg"
	fullName=$pathName/$fileName
	### With bash, the following can be fileNoExt=$(basename $fileName)
	fileNoExt=${fileName%.*}
	fullFolder=$pathName/$fileNoExt
	### Why not use the following instead
	/usr/local/share/PeaZip/bin/PeaZip -ext2folder
	zenity --info --title="DONE Executing" --text="/usr/local/share/PeaZip/bin/PeaZip -ext2folder" --width=200 --height=200
done

kwanbis · 01-05-2010, 11:13 AM

Yes, i know about peazip, in fact, it comes with some scripts in itself.

But i'm trying to understand why this is not working.

Like, shouldn't this scripts output to terminal?

David1357 · 01-05-2010, 11:20 AM

Quote:

Originally Posted by kwanbis

Like, shouldn't this scripts output to terminal?

Are you running the script from a terminal? If you are running this using the GUI, there is no TTY and all output goes to "/dev/null".

Even if you are running this from a terminal, the "res/7z/7z" binary may be designed to send all output to "/dev/null" as it appears to be a helper program.

kwanbis · 01-05-2010, 11:26 AM

I see what you mean.

So how comes i've seen plenty of shell script examples, where they use the "echo something2?

Shouldn't that work?

Also, fileNoExt=$(basename $fileName) gives nothing, i have tried it before.

I even changed to bash: #!/bin/bash

David1357 · 01-05-2010, 12:08 PM

Quote:

Originally Posted by kwanbis

So how comes i've seen plenty of shell script examples, where they use the "echo something"?

Many times I write scripts that use "echo" and a log file. That way, even if the script runs without a TTY, I can see the output of the "echo". For example

Code:

#!/bin/bash
LOGFILE="/var/log/script.log"
# Notice that the first time I write to the log file
# I use the create file redirect ">".  Also, I combine
# stderr with stdout using "2>&1", so that I log any
# errors.
echo "Starting the script..." > $LOGFILE 2>&1
# Notice that from this point on, I use the append file redirect ">>".
/usr/bin/something >> $LOGFILE 2>&1
echo "Done." >> $LOGFILE 2>&1

Quote:

Originally Posted by kwanbis

Also, fileNoExt=$(basename $fileName) gives nothing, i have tried it before.

Make sure your "bash" is really "bash". Run "ls -al $(which bash)". It may be a link to dash or something in "/etc/alternatives". In either case, it may not be the real full-featured "bash". Accept no substitutes...

kwanbis · 01-05-2010, 12:15 PM

Thanks again. I do know about redirection, from my DOS BATCH days. I would try that then, if needed.

This is the output i get:

-rwxr-xr-x. 1 root root 861128 2009-12-11 08:51 /bin/bash

David1357 · 01-05-2010, 12:27 PM

Quote:

Originally Posted by kwanbis

Thanks again. I do know about redirection, from my DOS BATCH days. I would try that then, if needed.

Yes, a lot of the Linux redirection syntax is very similar to DOS batch file syntax (and NT CMD file syntax for that matter...).

Quote:

Originally Posted by kwanbis

This is the output i get:

-rwxr-xr-x. 1 root root 861128 2009-12-11 08:51 /bin/bash

That looks correct. What does "bash --version" produce?

kwanbis · 01-05-2010, 12:34 PM

I get:

Quote:

GNU bash, version 4.0.35(1)-release (i386-redhat-linux-gnu)

David1357 · 01-05-2010, 12:58 PM

Quote:

Originally Posted by kwanbis

GNU bash, version 4.0.35(1)-release (i386-redhat-linux-gnu)

This is the second time I have seen someone post unexpected behaviour from version 4 of bash. Looks like "good enough" wasn't, so they changed it to "worse than before".