TrySystem() — Tries to execute an operating system command
Attempts to execute a command
in the underlying operating system. The result of the
command will be placed in the SYSTEMSTATUS channel variable and will be one
of the following:
FAILURE
The specified command could not
be executed.
SUCCESS
The specified command executed
successfully.
APPERROR
The specified command executed,
but returned an error code.
This application is very similar to the System() application, except that it always
returns normally, whereas the System() application will return abnormally if
it is unable to execute the system command.
exten => 123,1,TrySystem(echo hello > /tmp/hello.txt)