Executes a command using the system shell and captures its output.
Collects the output generated by a command executed by the system shell
Example: Shell example
The command supplied to this function will be executed by the system's shell, typically specified in the SHELL environment variable. There are many different system shells available with somewhat different behaviors, so the output generated by this function may vary between platforms.
If live_dangerously in asterisk.conf is set to no, this function can only be executed from the dialplan, and not directly from external protocols.
command - The command that the shell should execute.
Do not use untrusted strings such as CALLERID(num) or CALLERID(name) as part of the command parameters. You risk a command injection attack executing arbitrary commands if the untrusted strings aren't filtered to remove dangerous characters. See function FILTER().
This documentation was imported from Asterisk Version GIT-18-ff80a61