getting values with system() in C

Question

I want to collect values to a array in C using system().

With:

hcidump -a | egrep 'RSSI|bdaddr' | grep -A1 --no-group-separator 'bdaddr 78:A5:04:17:9F:66' | grep -Po 'RSSI:\s+\K.*'

an output like that:

-25
-24
-23
-26
-26

and want to store that values in an array in C, but that's not possible, I assume, with:

system("hcidump -a | egrep 'RSSI|bdaddr' | grep -A1 --no-group-separator 'bdaddr 78:A5:04:17:9F:66' | grep -Po 'RSSI:\s+\K.*'");

Has anybody an idea if there is a command to achieve that? or a workaroung? My only idea is to write the data into a file and afterwards read the information out of it, but I would like to have a better approch.

Best regards Adrian

Read about [`popen`](http://man7.org/linux/man-pages/man3/popen.3.html). — Some programmer dude, Jun 27 '16 at 08:22
`popen()` is the tool of choice here, agreed. `system()` will not lead you anywhere, you have no direct access to the program output. — tofro, Jun 27 '16 at 08:24
https://stackoverflow.com/questions/1583234/c-system-function-how-to-collect-the-output-of-the-issued-command — Mine, Jun 27 '16 at 08:28

Vijay · Answer 1 · 2016-06-27T08:36:22.830

2

Use the link and execute the command and inside the while loop, store each and every line in the array. Your job is done.

edited Jun 27 '16 at 08:36

answered Jun 27 '16 at 08:25

Vijay

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getting values with system() in C

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