hot to put a delimiter into output of "lsusb"

Question

I have an "lsusb" output as below:

khalemi@hpx:/opt$ lsusb -d 0c2e:0200
Bus 002 Device 004: ID 0c2e:0200 Metrologic Instruments Metrologic Scanner
Bus 002 Device 006: ID 0c2e:0200 Metrologic Instruments Metrologic Scanner

Q) How can I use "sed" to reformat the output ( using delimiter ---) to be like

Bus 002 Device 004: ID 0c2e:0200 Metrologic Instruments Metrologic Scanner
---
Bus 002 Device 006: ID 0c2e:0200 Metrologic Instruments Metrologic Scanner

I will then pass this output to another process like php script, and explode/split it using (---) delimiter into array.

please help.

Why bother with this when you could just split in PHP on `\n` (newline)? — John Zwinck, Feb 10 '15 at 04:49
i tried that i doesn't work. but later I found out that i had to put "\n" instead of '\n' in explode() for it to work as expected. my bad — MKhalemi, Feb 10 '15 at 05:08

score 2 · Answer 1 · answered Feb 10 '15 at 04:46

2

Using awk:

lsusb -d 0c2e:0200 | awk 'NR>1{print "---\n" $0}'

Using sed:

lsusb -d 0c2e:0200 | sed '1!s/^/---\n/'

In both cases, the code works by adding ---\n before every line except for the first line.

answered Feb 10 '15 at 04:46

John1024

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Avinash Raj · Accepted Answer · 2015-02-10T05:16:54.510

1

In php, you could do like

Through preg_split

$str = <<<EOT
Bus 002 Device 004: ID 0c2e:0200 Metrologic Instruments Metrologic Scanner
Bus 002 Device 006: ID 0c2e:0200 Metrologic Instruments Metrologic Scanner
EOT;
$split = preg_split('~\n~', $str);
print_r($split);

With explode,

$split = explode("\n", $str);

This splits the input according to the newline character.

Output:

Array
(
    [0] => Bus 002 Device 004: ID 0c2e:0200 Metrologic Instruments Metrologic Scanner
    [1] => Bus 002 Device 006: ID 0c2e:0200 Metrologic Instruments Metrologic Scanner
)

edited Feb 10 '15 at 05:16

answered Feb 10 '15 at 05:00

Avinash Raj

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Well done, solving the actual problem and removing the hacks. – John Zwinck Feb 10 '15 at 05:13

repzero · Answer 3 · 2015-02-10T06:39:10.297

0

another approach

using sed

lsusb -d 0c2e:0200|sed '$!{s/$/&\n---/g}'

results

Bus 002 Device 004: ID 0c2e:0200 Metrologic Instruments Metrologic Scanner
---
Bus 002 Device 006: ID 0c2e:0200 Metrologic Instruments Metrologic Scanner

edited Feb 10 '15 at 06:39

answered Feb 10 '15 at 06:03

repzero

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hot to put a delimiter into output of "lsusb"

3 Answers3