[SOLVED] Script debugging

business_kid · 10-19-2014, 08:59 AM

Hi, standard line 43 error again.

I have a symlink in /usr/bin pointing at /opt/google/earth/free/google-earth, and threw in a few "echo variable" lines for debugging purposes. All line numbers are the same as your script.

Code:

bash-4.3$ googleearth
/usr/bin/googleearth: line 41: cd: Line: No such file or directory
Line 42:  Line 26: /usr/bin/googleearth Line 30: /usr/bin/googleearth /opt/google/earth/free
/usr/bin/googleearth: line 43: ./googleearth-bin: No such file or directory


bash-4.3$ /opt/google/earth/free/google-earth
/opt/google/earth/free/google-earth: line 41: cd: Line: No such file or directory
Line 42:  Line 26: /opt/google/earth/free/google-earth Line 30: /opt/google/earth/free/google-earth /opt/google/earth/free
/opt/google/earth/free/google-earth: line 43: ./googleearth-bin: No such file or directory

If I wrote this script, I would feel bad about it. Has anyone got to the bottom of it? All the fancy sed and awk commands leave me a bit mystified but the thing just gets it wrong!

In looking at the above, Line 42 evidently causes it to run the 'FindPath' routine again - why I don't know. Line 42 just says
echo "Line 43: " $script_path

unSpawn · 10-19-2014, 11:39 AM

Running it as

Code:

/bin/bash -v /opt/google/earth/free/google-earth

and then looking at the output would make more sense to me.

business_kid · 10-19-2014, 01:17 PM

This is their script. Excuse the length. From what I see, only the three lines in red matter. The middle one calls the FindPath() routine with the argument $0. The routine does sod all (= nothing!) until the dirname $fullpath line. That truncates $0 to the directory.

Code:

#!/bin/sh
# Always run Google Earth from this shell script and not
# Google Earth directly! This script makes sure the app looks
# in the right place for libraries that might also be installed
# elsewhere on your system.
#
# Ryan C. Gordon,  Thu Jul 20 14:32:33 PDT 2006

# Function to find the real directory a program resides in.
FindPath()
{
    fullpath="`echo $1 | grep /`"
    if [ "$fullpath" = "" ]; then
        oIFS="$IFS"
        IFS=:
        for path in $PATH
        do if [ -x "$path/$1" ]; then
               if [ "$path" = "" ]; then
                   path="."
               fi
               fullpath="$path/$1"
               break
           fi
        done
        IFS="$oIFS"
    fi    
    if [ "$fullpath" = "" ]; then
        fullpath="$1"
    fi
 
    # Is the sed/ls magic portable?
    if [ -L "$fullpath" ]; then
        #               fullpath="`ls -l "$fullpath" | awk '{print $11}'`"
        fullpath=`ls -l "$fullpath" |sed -e 's/.* -> //' |sed -e 's/\*//'`
    fi
    dirname $fullpath
}

script_path=$(FindPath $0);

cd $script_path;

LD_LIBRARY_PATH=.:$LD_LIBRARY_PATH ./googleearth-bin "$@"

cd $script path attempts a cd to $0 (including the filename) Needless to say, that barfs, and we go down in flames.

I want something like
script_path = "(dirname $fullpath)" but that barfs on a syntax error.

so the cd script_path is a cd to a directory, not a filename. What's the exact syntax for that?

unSpawn · 10-19-2014, 05:35 PM

Why not

Code:

#!/bin/sh --
which readlink >/dev/null 2>&1 && { cd $(dirname $(readlink -f $0)) && LD_LIBRARY_PATH=.:$LD_LIBRARY_PATH ./googleearth-bin "$@"; }
exit 0

business_kid · 10-20-2014, 04:06 AM

:-)).

So it is possible to replace 43 lines of a script with 3 lines. As for me, it still throws up

Code:

./ge: line 3: ./googleearth-bin: No such file or directory

So I went digging. The first thing I found was that something was looking for /usr/bin/bash :-o?
Well, I just bodged past that with an otherwise harmless symlink in /usr/bin. After all, why stand on principle after coming this far?

Then ldd showed up

Code:

bash-4.3$ sudo ldd ./googleearth-bin |grep found
	libgoogleearth_free.so => not found
	libglobalnew.so => not found
bash-4.3$

So /opt/google/earth/free went onto ld.so.conf. I probably should have just added it to the LD_LIBRARY_PATH, but whatever. I added a diagnostic 'ls &&' after the first '&&' in your script, and it has definitely done a cd to /opt/google/earth/free. All the above directories back to /opt are owned root:root and perms 0755

I say all the above, because it STILL returns

Code:

/opt/google/earth/free/ge: line 3: ./googleearth-bin: No such file or directory

business_kid · 10-21-2014, 01:44 PM

For the record, this one is sorted.

I had the link /lib/ld-linux-so.2 --> ld-2.19.so and ldd was happy with that. Googleearth was not.

Code:

ln -s /lib/ld-2.19.so    /lib/ld-lsb.so.3

was what it wanted. Even google's script works it. The 'ls' inserted was actually a much better ploy than echoing variables.