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1 Modern Linux Desktop Stack Rex Tsai [email protected] http://nutsfactory.net/ COSCUP 2013 @ TICC 2013-08-03

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2 Rex Tsai 任職 Canonical 軟體工程師， 超過十年的 Linux 使用者、開發者， 活躍於台灣開放原碼社群。 http://about.me/chihchun/

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3 Pre-Desktop era Pre-Desktop era GNOME/KDE GNOME/KDE KDE 1.0 KDE 1.0 POST-PC / Mobile era POST-PC / Mobile era July 12, 1998 July 12, 1998 History of Linux Desktop

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4 Kernel, drivers Kernel, drivers Plumbing (hal, devicekit) Plumbing (hal, devicekit) IPC (D-Bus) IPC (D-Bus) Access control (PolicyKit, ConsoleKit) Access control (PolicyKit, ConsoleKit) Desktop (nm-applet, g-s-d, gnome-control-center) Desktop (nm-applet, g-s-d, gnome-control-center) uevent /sys, /dev, ioctls ... Current design

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5 Session Bus Session Bus System Bus System Bus ● Init by /sbin/init ● System service ● Init by user session ● User's application

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7 Many application supported

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8 Messages

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9 Built-in security

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10 Kernel, drivers Kernel, drivers Plumbing (hal, devicekit) Plumbing (hal, devicekit) IPC (D-Bus) IPC (D-Bus) Access control (PolicyKit, ConsoleKit) Access control (PolicyKit, ConsoleKit) power power media-keys media-keys xrandr xrandr color color sound sound xsettings xsettings wacom wacom

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11 Authentication PolicyKit PolicyKit ConsoleKit ConsoleKit ● Defined policy on actions ● /etc/polkit-1/localauthority/* ● The new `last'

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12 Dbus: System Bus Dbus: System Bus Network Manager Network Manager nm-applet (user session) nm-applet (user session) pptp pptp iw wpa_supplicant iw wpa_supplicant ifconfig ifconfig dnsmasq dnsmasq Network manager

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13 Power management Kernel /sys/power/state /sys/class/power_supply* Kernel /sys/power/state /sys/class/power_supply* pm-utils pm-utils g-s-d power g-s-d power upower upower indicator-session indicator-session gnome-power-statistics gnome-power-statistics

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16 Kernel /sys/block/*, mount(), mkfs, fuse Kernel /sys/block/*, mount(), mkfs, fuse udisks udisks g-s-d mounter helper g-s-d mounter helper gvfs gvfs Nemo/nautilus Nemo/nautilus Storage

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17 Kernel /sys/block/*, mount(), mkfs, fuse Kernel /sys/block/*, mount(), mkfs, fuse alsa alsa pulseaudio pulseaudio bluez bluez Audio gnome-control-center sound-nua gnome-control-center sound-nua gstreamer gstreamer alsa alsa

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18 Kernel, drivers Kernel, drivers Plumbing (hal, devicekit) Plumbing (hal, devicekit) IPC (D-Bus) IPC (D-Bus) Kauth Kauth Solid Solid KPart KPart KIO KIO

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19 Power management Kernel /sys/power/state /sys/class/power_supply* Kernel /sys/power/state /sys/class/power_supply* pm-utils pm-utils g-s-d power g-s-d power upower upower indicator-session indicator-session gnome-power-statistics gnome-power-statistics

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20 Kernel Kernel Android HAL (RIL) Android HAL (RIL) RIL socket RIL socket ofone ofone Telephony client Telephony client Radio

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21 Kernel Kernel HAL / GBM, KMS, DRM HAL / GBM, KMS, DRM Android HAL (Graphic) Android HAL (Graphic) Libhybris (bionic/glibc) Libhybris (bionic/glibc) MIR MIR QtUbuntu QtUbuntu Qt/QML Qt/QML Ubuntu Touch Ubuntu Touch XMIR XMIR Applications Applications Qt/QML Qt/QML Ubuntu Apps Ubuntu Apps Graphic Qt Qt Gtk Gtk

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22 Thank you Ref * Linux Desktop Plumbing Stack by Martin Pitt https://docs.google.com/presentation/d/15PMqKUWkDeA2GAF-x1QiZxLXbOmlRpBs1lk LOI8KcFQ/present * Under the Hood of GNOME3 — 関西 Debian 勉強会用資料 http://yyatsuo.com/kansai-debian/index.html * 基本的 DBus 偵錯技巧 http://blog.nutsfactory.net/2011/03/08/test-and-debug-dbus/ * Watch Bossa '09: Plumbing The Linux Desktop - David Zeuthen http://blip.tv/openbossa/bossa-09-plumbing-the-linux-desktop-david-zeuthen-1893874