Simplify code by using property get functions, with most of them
autogenerated based on GObject properties and GValue transforms.
Based on a patch from Jiří Klimeš
This is similar to clicking a Wi-Fi network's SSID in a GUI applet.
The command does this:
- creates new connection (fills the user data specified via options, the
connection is then completed with default parameters by NM)
- and then activates the connection on a Wi-Fi device.
WPA-Enterprise is not supported as it requires a plethora of parameters and
they can't be obtained automatically.
Also, the created connection uses 'auto' IP method, which means that if the
Wi-Fi network doesn't support DHCP, the connection will albeit be created,
however the activation will fail (IP configuration won't be available).
Field values can now be string arrays. print_fields() recognizes the format and
prints values accordingly.
Setter functions was added to facilitate setting string vs. array:
set_val_str(), set_val_arr()
nmcli gets NM version and compares it with its own and complains
when they differ. This is to indicate that the results are not reliable,
because the API could differ. '--nocheck' switches the checks off.
If SSID is a UTF-8 string, it is printed as it is, but enclosed in quotes.
Otherwise the bytes are converted to hex string (in uppercase).
The added quotes for UTF-8 string allow to disambiguate the two forms.
The output is basically tabular with fields (columns) presenting specific pieces of info.
Each line represents a single object. It's possible to switch to multiline output using
'--multiline' option. In that mode single object is presented on more lines - each field
on its line.
Terse mode now uses ':' as field separator. It also escapes all occurences of ':' and '\'
inside field values to ease parsing. The escaping behaviour can be controlled through
'--escape' option. By default, escaping is switched on in tabular mode. When using terse
mode ('--terse'), '--fields' option is mandatory for specifying required fields. That helps
for flexibility and backwards compatibility.
Not all output is converted yet.
