Sync Script

[Forbees]

wrote a script to sync my netbook music with my server music and everything was fine.

but if for some reason lets say i run it accidently and i'm not connected to my network, i just wiped my netbook music

here's what i got so far:

Sudo mkdir /media/ServerMusic/
mount -t cifs -o user=Justin,password=****** //192.168.1.108/Public-3/Music/ /media/ServerMusic/
rsync -v -P --delete --min-size=500 -r -u /media/ServerMusic/ /home/forbees/Music/
umount /media/ServerMusic/
rm -r /media/ServerMusic/

i need to have the --delete option in rsync (say i sync it and realize i hate some music, when i delete it from the server i don't want it still on the netbook



i want an if statement in here somehow, but i'm not sure how to do it

something like, the first command in the script should be a ping test, if ping doesn't work end the script, if ping does work continue


ooorrrrr, if the server music gets mounted to the created directory continue, if the mount failed, or even in the mounted folder is empty stop the script


what can i do here to ensure i can keep the --delete and not have to worry about losing my music if the mount fails?

[Zorgoth]

After you execute mount, there will be a variable $?. If this variable is zero the mount was successful, otherwise not.

I think.

[Forbees]

how would you write that in the script?

[Zorgoth]

Type "man bash" in the terminal for a general description of bash.


Here is basically what you need to do:

if [[ 0 == $? ]]
then
    proceed_as_normal
else
    error_message
fi

Note that the spaces in the "if" expression are essential.

[fragos]

I use Unison to sync folders between my laptop and desktop over WiFi using NFS. I never have any surprises.

[Forbees]

i've had problems with unison and security before (since you have to login to access the finals)

i'll try out that code once i'm done resyncing my netbook (reasons why i'm looking into this script . . i ran it when i wasn't connected, synced my music folder with an empty folder lol)

hope it works

[Forbees]

Type "man bash" in the terminal for a general description of bash.


Here is basically what you need to do:

if [[ 0 == $? ]]
then
    proceed_as_normal
else
    error_message
fi

Note that the spaces in the "if" expression are essential.

whats the "fi" at the end for? is that a typo or needed lol

[Zorgoth]

This may be obvious, but remember to put the if precisely after the mount command.

[Zorgoth]

The fi is necessary. It defines the end of the if block. I would recommend reading man bash.

[Forbees]

k, just wanted to make sure, i only have a little programming knowlege

(basic, C++, java) back in highschool, so i wasn't sure if a script needed something to define the end or not (some basic level macro programing IF commands only work with one line of code, than assume the next line isn't a part of it)