Making a randomized filename in bash?

[rieda1589]

Basically, I'm making a screenshot script, it'll let me drag a rectangle, upload the image and put the URL in my clipboard.

Everything is fine, except I can't get the name randomized.

I've tried a shit load of stuff... including

cat /dev/urandom | tr -cd 'a-zA-Z0-9-_' | head -c 3

But I just get

[quote]ben@ben-ubuntu:~/.imageup$ ./window.sh
./window.sh: line 6: /dev/urandom: Permission denied[/quote]

Any help?

Here's my script

#!/bin/bash -e

IMGDIR=~/.imageup
cd $IMGDIR

#IMG=cat /dev/urandom | tr -cd 'a-zA-Z0-9-_' | head -c 3
IMG=$(date +%Y%m%d%H%M%S)
EXT=.png
ICON="/home/ben/.icons/elementary/places/128/network.svg"

scrot -d 0 -b -s -q 1 $IMG$EXT
notify-send -i $ICON $IMG$EXT "Captured"

HOST="somewhere"
USER="somebody"
PASSWD="something"

ftp -n $HOST <<EOF
quote USER $USER
quote PASS $PASSWD
cd /home/ben/benbrooks.co.uk/img/
put $IMG$EXT
EOF

echo "http://bbrks.me/i/$IMG$EXT" | xclip -selection clipboard
notify-send -i $ICON $IMG$EXT "Uploaded!"
#rm $IMG

I need the $IMG randomized, lowercase, uppercase, numbers and - _ (as seen in the /dev/urandom snippet)

[butre]

try using cut?

[ers35.]

Is this what you are trying to do?

IMG=</dev/urandom tr -cd 'a-zA-Z0-9-_' | head -c 3
echo $IMG

[B]Edit:[/B] Check my post below for the correct code.

[rieda1589]

[QUOTE=ers35.;25028668]Is this what you are trying to do?

IMG=</dev/urandom tr -cd 'a-zA-Z0-9-_' | head -c 3
echo $IMG

[/QUOTE]

Not quite.

IMG=</dev/urandom tr -cd 'a-zA-Z0-9-_' | head -c 3

Having IMG as that basically does this:

[quote]ben@ben-ubuntu:~$ sh ~/.imageup/window.sh
CpZ[/quote]

And then $IMG doesn't seem to be anything, so the URL that gets put in my clipboard is just "http://bbrks.me/i/".

[ers35.]

I think I fixed it.

IMG=`cat /dev/urandom | tr -cd 'a-zA-Z0-9-_' | head -c 3`
echo "http://bbrks.me/i/$IMG"

[rieda1589]

[QUOTE=ers35.;25028900]I think I fixed it.

IMG=`cat /dev/urandom | tr -cd 'a-zA-Z0-9-_' | head -c 3`
echo "http://bbrks.me/i/$IMG"

[/QUOTE]

It worked!!

[img]http://bbrks.me/i/yqv.png[/img]

Thanks :)

[rieda1589]

By the way, Just in case anybody is using the window script and it won't work via a hotkey.

You'll need to add a sleep 0.25; just before the scrot command, else it won't work properly.

[img]http://bbrks.me/i/7xs.png[/img]

[Lego399]

[QUOTE=rieda1589;25045609]By the way, Just in case anybody is using the window script and it won't work via a hotkey.

You'll need to add a sleep 0.25; just before the scrot command, else it won't work properly.

[img]http://bbrks.me/i/7xs.png[/img][/QUOTE]

My AnyHub script is working fine without it :v:

[rieda1589]

[QUOTE=Lego399;25046251]My AnyHub script is working fine without it :v:[/QUOTE]

Weird... It just captures an empty image if I don't add that sleep.

[Maccabee]

touch <smash keyboard>

[turb_]

The proper way would be mktemp