hcitool scan via shell script

rahulkhn · #1 (**permalink**) 07-15-2008

Hello,

Im new to shell scripting , and i have the following question .

The hcitool scan command returns the bluetooth address of the phone . When it is run the output is something like

Code:

Scanning....
             00:A1:5D:AB:B2:E9  Nokia 6600

Can i get the output in a varaiable in a shell script ?

I tried redirecting the output to a file, as follows

Code:

hcitool scan > addr

But the file only recorded "Scanning....". The remaining part was not saved.

Please help.

Thanks.

Annihilannic · #2 (**permalink**) 07-15-2008

Maybe the second bit of output is sent to stderr instead of stdout? Try hcitool scan > addr 2>&1.

If that works, use this to get it into a variable:

Code:

addr=$(hcitool scan 3>&1 >/dev/null 2>&3 | awk '{print $1}')

The 3>&1 part copies file descriptor 1 (stdout) to a new file descriptor 3. >/dev/null discards stdout, and then 2>&3 redirects stderr to the new file descriptor. This means that the awk process which is next in the pipeline can read from stdin what would previously have gone to stderr.

More UNIX and Linux Forum Topics You Might Find Helpful
Thread	Thread Starter	Forum	Replies	Last Post
Accessing variables of one shell script in another shell script	rsendhilmani	Shell Programming and Scripting	2	03-17-2009 01:17 AM
Script to Scan proclog files	deeprajn95	Shell Programming and Scripting	3	05-12-2008 06:25 AM
Perl script to scan back lines	gholdbhurg	Shell Programming and Scripting	3	03-18-2008 12:33 PM
Perl script to scan through files	gholdbhurg	Shell Programming and Scripting	1	03-05-2008 10:53 PM
port scan shell script	nrbhole	Shell Programming and Scripting	3	01-31-2008 11:28 AM

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search
Display Modes	Rate This Thread
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode	Rate This Thread: