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1 1 # rpi23-gen-image
2 2 ## Introduction
3 3 `rpi23-gen-image.sh` is an advanced Debian Linux bootstrapping shell script for generating Debian OS images for all Raspberry Pi computers. The script at this time supports the bootstrapping of the Debian (armhf/armel) releases `stretch` and `buster`. Raspberry Pi 0/1/2/3 images are generated for 32-bit mode only. Raspberry Pi 3 supports 64-bit images that can be generated using custom configuration parameters (```templates/rpi3-stretch-arm64-4.14.y```).
4 4
5 5 ## Build dependencies
6 6 The following list of Debian packages must be installed on the build system because they are essentially required for the bootstrapping process. The script will check if all required packages are installed and missing packages will be installed automatically if confirmed by the user.
7 7
8 8 ```debootstrap debian-archive-keyring qemu-user-static binfmt-support dosfstools rsync bmap-tools whois git bc psmisc dbus sudo```
9 9
10 10 It is recommended to configure the `rpi23-gen-image.sh` script to build and install the latest Raspberry Pi Linux kernel. For the Raspberry 3 this is mandatory. Kernel compilation and linking will be performed on the build system using an ARM (armhf/armel) cross-compiler toolchain.
11 11
12 12 The script has been tested using the default `crossbuild-essential-armhf` and `crossbuild-essential-armel` toolchain meta packages on Debian Linux `stretch` build systems. Please check the [Debian CrossToolchains Wiki](https://wiki.debian.org/CrossToolchains) for further information.
13 13
14 14 ## Command-line parameters
15 15 The script accepts certain command-line parameters to enable or disable specific OS features, services and configuration settings. These parameters are passed to the `rpi23-gen-image.sh` script via (simple) shell-variables. Unlike environment shell-variables (simple) shell-variables are defined at the beginning of the command-line call of the `rpi23-gen-image.sh` script.
16 16
17 17 ##### Command-line examples:
18 18 ```shell
19 19 ENABLE_UBOOT=true ./rpi23-gen-image.sh
20 20 ENABLE_CONSOLE=false ENABLE_IPV6=false ./rpi23-gen-image.sh
21 21 ENABLE_WM=xfce4 ENABLE_FBTURBO=true ENABLE_MINBASE=true ./rpi23-gen-image.sh
22 22 ENABLE_HARDNET=true ENABLE_IPTABLES=true /rpi23-gen-image.sh
23 23 APT_SERVER=ftp.de.debian.org APT_PROXY="http://127.0.0.1:3142/" ./rpi23-gen-image.sh
24 24 ENABLE_MINBASE=true ./rpi23-gen-image.sh
25 25 BUILD_KERNEL=true ENABLE_MINBASE=true ENABLE_IPV6=false ./rpi23-gen-image.sh
26 26 BUILD_KERNEL=true KERNELSRC_DIR=/tmp/linux ./rpi23-gen-image.sh
27 27 ENABLE_MINBASE=true ENABLE_REDUCE=true ENABLE_MINGPU=true BUILD_KERNEL=true ./rpi23-gen-image.sh
28 28 ENABLE_CRYPTFS=true CRYPTFS_PASSWORD=changeme EXPANDROOT=false ENABLE_MINBASE=true ENABLE_REDUCE=true ENABLE_MINGPU=true BUILD_KERNEL=true ./rpi23-gen-image.sh
29 29 RELEASE=stretch BUILD_KERNEL=true ./rpi23-gen-image.sh
30 30 RPI_MODEL=3 ENABLE_WIRELESS=true ENABLE_MINBASE=true BUILD_KERNEL=true ./rpi23-gen-image.sh
31 31 RELEASE=stretch RPI_MODEL=3 ENABLE_WIRELESS=true ENABLE_MINBASE=true BUILD_KERNEL=true ./rpi23-gen-image.sh
32 32 ```
33 33
34 34 ## Configuration template files
35 35 To avoid long lists of command-line parameters and to help to store the favourite parameter configurations the `rpi23-gen-image.sh` script supports so called configuration template files (`CONFIG_TEMPLATE`=template). These are simple text files located in the `./templates` directory that contain the list of configuration parameters that will be used. New configuration template files can be added to the `./templates` directory.
36 36
37 37 ##### Command-line examples:
38 38 ```shell
39 39 CONFIG_TEMPLATE=rpi3stretch ./rpi23-gen-image.sh
40 40 CONFIG_TEMPLATE=rpi2stretch ./rpi23-gen-image.sh
41 41 ```
42 42
43 43 ## Supported parameters and settings
44 44 #### APT settings:
45 45 ##### `APT_SERVER`="ftp.debian.org"
46 46 Set Debian packages server address. Choose a server from the list of Debian worldwide [mirror sites](https://www.debian.org/mirror/list). Using a nearby server will probably speed-up all required downloads within the bootstrapping process.
47 47
48 48 ##### `APT_PROXY`=""
49 49 Set Proxy server address. Using a local Proxy-Cache like `apt-cacher-ng` will speed-up the bootstrapping process because all required Debian packages will only be downloaded from the Debian mirror site once. If `apt-cacher-ng` is running on default `http://127.0.0.1:3142` it is autodetected and you don't need to set this.
50 50
51 51 ##### `APT_INCLUDES`=""
52 A comma separated list of additional packages to be installed by debootstrap during bootstrapping.
52 A comma-separated list of additional packages to be installed by debootstrap during bootstrapping.
53 53
54 54 ##### `APT_INCLUDES_LATE`=""
55 A comma separated list of additional packages to be installed by apt after bootstrapping and after APT sources are set up. This is useful for packages with pre-depends, which debootstrap do not handle well.
55 A comma-separated list of additional packages to be installed by apt after bootstrapping and after APT sources are set up. This is useful for packages with pre-depends, which debootstrap do not handle well.
56 56
57 57 ---
58 58
59 59 #### General system settings:
60 60 ##### `SET_ARCH`=32
61 Set Architecture to default 32bit. If you want to to compile 64bit (RPI3 or RPI3+) set it to `64`. This option will set every needed crosscompiler or boeard specific option for a successful build.
61 Set Architecture to default 32bit. If you want to compile 64-bit (RPI3 or RPI3+) set it to `64`. This option will set every needed cross-compiler or board specific option for a successful build.
62 62
63 63 ##### `RPI_MODEL`=2
64 Specifiy the target Raspberry Pi hardware model. The script at this time supports the following Raspberry Pi models:
65 - `0` = Used for Raspberry Pi 0 and Raspberry Pi 0 W
66 - `1` = Used for Pi 1 model A and B
67 - `1P` = Used for Pi 1 model B+ and A+
68 - `2` = Used for Pi 2 model B
69 - `3` = Used for Pi 3 model B
70 - `3P` = Used for Pi 3 model B+
71 - `BUILD_KERNEL`=true will automatically be set if the Raspberry Pi model `3` or `3P` is used.
64 Specify the target Raspberry Pi hardware model. The script at this time supports the following Raspberry Pi models:
65 - `0` = Raspberry Pi 0 and Raspberry Pi 0 W
66 - `1` = Raspberry Pi 1 model A and B
67 - `1P` = Raspberry Pi 1 model B+ and A+
68 - `2` = Raspberry Pi 2 model B
69 - `3` = Raspberry Pi 3 model B
70 - `3P` = Raspberry Pi 3 model B+
72 71
73 72 ##### `RELEASE`="buster"
74 73 Set the desired Debian release name. The script at this time supports the bootstrapping of the Debian releases `stretch` and `buster`.
75 74
76 75 ##### `RELEASE_ARCH`="armhf"
77 76 Set the desired Debian release architecture.
78 77
79 78 ##### `HOSTNAME`="rpi$RPI_MODEL-$RELEASE"
80 Set system host name. It's recommended that the host name is unique in the corresponding subnet.
79 Set system hostname. It's recommended that the hostname is unique in the corresponding subnet.
81 80
82 81 ##### `PASSWORD`="raspberry"
83 82 Set system `root` password. It's **STRONGLY** recommended that you choose a custom password.
84 83
85 84 ##### `USER_PASSWORD`="raspberry"
86 85 Set password for the created non-root user `USER_NAME`=pi. Ignored if `ENABLE_USER`=false. It's **STRONGLY** recommended that you choose a custom password.
87 86
88 87 ##### `DEFLOCAL`="en_US.UTF-8"
89 88 Set default system locale. This setting can also be changed inside the running OS using the `dpkg-reconfigure locales` command. Please note that on using this parameter the script will automatically install the required packages `locales`, `keyboard-configuration` and `console-setup`.
90 89
91 90 ##### `TIMEZONE`="Europe/Berlin"
92 91 Set default system timezone. All available timezones can be found in the `/usr/share/zoneinfo/` directory. This setting can also be changed inside the running OS using the `dpkg-reconfigure tzdata` command.
93 92
94 93 ##### `EXPANDROOT`=true
95 94 Expand the root partition and filesystem automatically on first boot.
96 95
97 96 ##### `ENABLE_QEMU`=false
98 97 Generate kernel (`vexpress_defconfig`), file system image (`qcow2`) and DTB files that can be used for QEMU full system emulation (`vexpress-A15`). The output files are stored in the `$(pwd)/images/qemu` directory. You can find more information about running the generated image in the QEMU section of this readme file.
99 98
100 99 ---
101 100
102 101 #### Keyboard settings:
103 102 These options are used to configure keyboard layout in `/etc/default/keyboard` for console and Xorg. These settings can also be changed inside the running OS using the `dpkg-reconfigure keyboard-configuration` command.
104 103
105 104 ##### `XKB_MODEL`=""
106 105 Set the name of the model of your keyboard type.
107 106
108 107 ##### `XKB_LAYOUT`=""
109 108 Set the supported keyboard layout(s).
110 109
111 110 ##### `XKB_VARIANT`=""
112 111 Set the supported variant(s) of the keyboard layout(s).
113 112
114 113 ##### `XKB_OPTIONS`=""
115 114 Set extra xkb configuration options.
116 115
117 116 ---
118 117
119 118 #### Networking settings (DHCP):
120 This parameter is used to set up networking auto configuration in `/etc/systemd/network/eth.network`. The default location of network configuration files in the Debian `stretch` release was changed to `/lib/systemd/network`.`
119 This parameter is used to set up networking auto-configuration in `/etc/systemd/network/eth.network`. The default location of network configuration files in the Debian `stretch` release was changed to `/lib/systemd/network`.`
121 120
122 121 ##### `ENABLE_DHCP`=true
123 122 Set the system to use DHCP. This requires an DHCP server.
124 123
125 124 ---
126 125
127 126 #### Networking settings (static):
128 127 These parameters are used to set up a static networking configuration in `/etc/systemd/network/eth.network`. The following static networking parameters are only supported if `ENABLE_DHCP` was set to `false`. The default location of network configuration files in the Debian `stretch` release was changed to `/lib/systemd/network`.
129 128
130 129 ##### `NET_ADDRESS`=""
131 130 Set a static IPv4 or IPv6 address and its prefix, separated by "/", eg. "192.169.0.3/24".
132 131
133 132 ##### `NET_GATEWAY`=""
134 133 Set the IP address for the default gateway.
135 134
136 135 ##### `NET_DNS_1`=""
137 136 Set the IP address for the first DNS server.
138 137
139 138 ##### `NET_DNS_2`=""
140 139 Set the IP address for the second DNS server.
141 140
142 141 ##### `NET_DNS_DOMAINS`=""
143 Set the default DNS search domains to use for non fully qualified host names.
142 Set the default DNS search domains to use for non fully qualified hostnames.
144 143
145 144 ##### `NET_NTP_1`=""
146 145 Set the IP address for the first NTP server.
147 146
148 147 ##### `NET_NTP_2`=""
149 148 Set the IP address for the second NTP server.
150 149
151 150 ---
152 151
153 152 #### Basic system features:
154 153 ##### `ENABLE_CONSOLE`=true
155 154 Enable serial console interface. Recommended if no monitor or keyboard is connected to the RPi2/3. In case of problems fe. if the network (auto) configuration failed - the serial console can be used to access the system. On RPI `0` `3` `3P` the CPU speed is locked at lowest speed.
156 155
157 156 ##### `ENABLE_PRINTK`=false
158 157 Enables printing kernel messages to konsole. printk is `3 4 1 3` as in raspbian.
159 158
160 159 ##### `ENABLE_BLUETOOTH`=false
161 Enable onboard Bluetooth interface on the RPi0/3/3P. See: https://spellfoundry.com/2016/05/29/configuring-gpio-serial-port-raspbian-jessie-including-pi-3/
160 Enable onboard Bluetooth interface on the RPi0/3/3P. See: [Configuring the GPIO serial port on Raspbian jessie and stretch](https://spellfoundry.com/2016/05/29/configuring-gpio-serial-port-raspbian-jessie-including-pi-3/).
162 161
163 162 ##### `ENABLE_MINIUART_OVERLAY`=false
164 Enable Bluetooth to use this. Adds overlay to swap UART0 with UART1. Enabling (slower) Bluetooth and full speed serial console. - RPI `0` `3` `3P` have a fast `hardware UART0` (ttyAMA0) and a `mini UART1` (ttyS0)! RPI `1` `1P` `2` only have a `hardware UART0`. `UART0` is considered better, because is faster and more stable than `mini UART1`. By default the Bluetooth modem is mapped to the `hardware UART0` and `mini UART` is used for console. The `mini UART` is a problem for the serial console, because its baudrate depends on the cpu frequency, which is changing on runtime. Resulting in a volatile baudrate and thus in an unusable serial console.
163 Enable Bluetooth to use this. Adds overlay to swap UART0 with UART1. Enabling (slower) Bluetooth and full speed serial console. - RPI `0` `3` `3P` have a fast `hardware UART0` (ttyAMA0) and a `mini UART1` (ttyS0)! RPI `1` `1P` `2` only have a `hardware UART0`. `UART0` is considered better, because is faster and more stable than `mini UART1`. By default the Bluetooth modem is mapped to the `hardware UART0` and `mini UART` is used for console. The `mini UART` is a problem for the serial console, because its baudrate depends on the CPU frequency, which is changing on runtime. Resulting in a volatile baudrate and thus in an unusable serial console.
165 164
166 165 ##### `ENABLE_TURBO`=false
167 Enable Turbo mode. This setting locks cpu at highest frequency. As setting ENABLE_CONSOLE=true locks RPI to lowest CPU speed, this is can be used additionally to lock cpu hat max speed. Need a good power supply and probably cooling for the Raspberry PI.
166 Enable Turbo mode. This setting locks cpu at the highest frequency. As setting ENABLE_CONSOLE=true locks RPI to lowest CPU speed, this is can be used additionally to lock cpu hat max speed. Need a good power supply and probably cooling for the Raspberry PI.
168 167
169 168 ##### `ENABLE_I2C`=false
170 169 Enable I2C interface on the RPi 0/1/2/3. Please check the [RPi 0/1/2/3 pinout diagrams](https://elinux.org/RPi_Low-level_peripherals) to connect the right GPIO pins.
171 170
172 171 ##### `ENABLE_SPI`=false
173 172 Enable SPI interface on the RPi 0/1/2/3. Please check the [RPi 0/1/2/3 pinout diagrams](https://elinux.org/RPi_Low-level_peripherals) to connect the right GPIO pins.
174 173
175 174 ##### `ENABLE_IPV6`=true
176 175 Enable IPv6 support. The network interface configuration is managed via systemd-networkd.
177 176
178 177 ##### `ENABLE_SSHD`=true
179 178 Install and enable OpenSSH service. The default configuration of the service doesn't allow `root` to login. Please use the user `pi` instead and `su -` or `sudo` to execute commands as root.
180 179
181 180 ##### `ENABLE_NONFREE`=false
182 181 Allow the installation of non-free Debian packages that do not comply with the DFSG. This is required to install closed-source firmware binary blobs.
183 182
184 183 ##### `ENABLE_WIRELESS`=false
185 184 Download and install the [closed-source firmware binary blob](https://github.com/RPi-Distro/firmware-nonfree/raw/master/brcm) that is required to run the internal wireless interface of the Raspberry Pi model `3`. This parameter is ignored if the specified `RPI_MODEL` is not `3`.
186 185
187 186 ##### `ENABLE_RSYSLOG`=true
188 187 If set to false, disable and uninstall rsyslog (so logs will be available only in journal files)
189 188
190 189 ##### `ENABLE_SOUND`=true
191 190 Enable sound hardware and install Advanced Linux Sound Architecture.
192 191
193 192 ##### `ENABLE_HWRANDOM`=true
194 Enable Hardware Random Number Generator. Strong random numbers are important for most network based communications that use encryption. It's recommended to be enabled.
193 Enable Hardware Random Number Generator. Strong random numbers are important for most network-based communications that use encryption. It's recommended to be enabled.
195 194
196 195 ##### `ENABLE_MINGPU`=false
197 196 Minimize the amount of shared memory reserved for the GPU. It doesn't seem to be possible to fully disable the GPU.
198 197
199 198 ##### `ENABLE_DBUS`=true
200 199 Install and enable D-Bus message bus. Please note that systemd should work without D-bus but it's recommended to be enabled.
201 200
202 201 ##### `ENABLE_XORG`=false
203 202 Install Xorg open-source X Window System.
204 203
205 204 ##### `ENABLE_WM`=""
206 Install a user defined window manager for the X Window System. To make sure all X related package dependencies are getting installed `ENABLE_XORG` will automatically get enabled if `ENABLE_WM` is used. The `rpi23-gen-image.sh` script has been tested with the following list of window managers: `blackbox`, `openbox`, `fluxbox`, `jwm`, `dwm`, `xfce4`, `awesome`.
205 Install a user-defined window manager for the X Window System. To make sure all X related package dependencies are getting installed `ENABLE_XORG` will automatically get enabled if `ENABLE_WM` is used. The `rpi23-gen-image.sh` script has been tested with the following list of window managers: `blackbox`, `openbox`, `fluxbox`, `jwm`, `dwm`, `xfce4`, `awesome`.
207 206
208 207 ##### `ENABLE_SYSVINIT`=false
209 208 Support for halt,init,poweroff,reboot,runlevel,shutdown,telinit commands
210 209
211 210 ---
212 211
213 212 #### Advanced system features:
214 213 ##### `ENABLE_MINBASE`=false
215 214 Use debootstrap script variant `minbase` which only includes essential packages and apt. This will reduce the disk usage by about 65 MB.
216 215
217 216 ##### `ENABLE_REDUCE`=false
218 217 Reduce the disk space usage by deleting packages and files. See `REDUCE_*` parameters for detailed information.
219 218
220 219 ##### `ENABLE_UBOOT`=false
221 220 Replace the default RPi 0/1/2/3 second stage bootloader (bootcode.bin) with [U-Boot bootloader](https://git.denx.de/?p=u-boot.git;a=summary). U-Boot can boot images via the network using the BOOTP/TFTP protocol.
222 221
223 222 ##### `UBOOTSRC_DIR`=""
224 223 Path to a directory (`u-boot`) of [U-Boot bootloader sources](https://git.denx.de/?p=u-boot.git;a=summary) that will be copied, configured, build and installed inside the chroot.
225 224
226 225 ##### `ENABLE_FBTURBO`=false
227 226 Install and enable the [hardware accelerated Xorg video driver](https://github.com/ssvb/xf86-video-fbturbo) `fbturbo`. Please note that this driver is currently limited to hardware accelerated window moving and scrolling.
228 227
229 228 ##### `FBTURBOSRC_DIR`=""
230 229 Path to a directory (`xf86-video-fbturbo`) of [hardware accelerated Xorg video driver sources](https://github.com/ssvb/xf86-video-fbturbo) that will be copied, configured, build and installed inside the chroot.
231 230
232 231 ##### `ENABLE_VIDEOCORE`=false
233 Install and enable the [Source code for ARM side libraries for interfacing to Raspberry Pi GPU](https://github.com/raspberrypi/userland) `vcgencmd`. Please note that this driver is currently limited to hardware accelerated window moving and scrolling.
232 Install and enable the [ARM side libraries for interfacing to Raspberry Pi GPU](https://github.com/raspberrypi/userland) `vcgencmd`. Please note that this driver is currently limited to hardware accelerated window moving and scrolling.
234 233
235 234 ##### `VIDEOCORESRC_DIR`=""
236 Path to a directory (`userland`) of [Source code for ARM side libraries for interfacing to Raspberry Pi GPU](https://github.com/raspberrypi/userland) that will be copied, configured, build and installed inside the chroot.
235 Path to a directory (`userland`) of [ARM side libraries for interfacing to Raspberry Pi GPU](https://github.com/raspberrypi/userland) that will be copied, configured, build and installed inside the chroot.
237 236
238 237 ##### `ENABLE_IPTABLES`=false
239 238 Enable iptables IPv4/IPv6 firewall. Simplified ruleset: Allow all outgoing connections. Block all incoming connections except to OpenSSH service.
240 239
241 240 ##### `ENABLE_USER`=true
242 Create non-root user with password `USER_PASSWORD`=raspberry. Unless overridden with `USER_NAME`=user, username will be `pi`.
241 Create non-root user with password `USER_PASSWORD`=raspberry. Unless overridden with `USER_NAME`=user, the username will be `pi`.
243 242
244 243 ##### `USER_NAME`=pi
245 244 Non-root user to create. Ignored if `ENABLE_USER`=false
246 245
247 246 ##### `ENABLE_ROOT`=false
248 247 Set root user password so root login will be enabled
249 248
250 249 ##### `ENABLE_HARDNET`=false
251 250 Enable IPv4/IPv6 network stack hardening settings.
252 251
253 252 ##### `ENABLE_SPLITFS`=false
254 253 Enable having root partition on an USB drive by creating two image files: one for the `/boot/firmware` mount point, and another for `/`.
255 254
256 255 ##### `CHROOT_SCRIPTS`=""
257 256 Path to a directory with scripts that should be run in the chroot before the image is finally built. Every executable file in this directory is run in lexicographical order.
258 257
259 258 ##### `ENABLE_INITRAMFS`=false
260 259 Create an initramfs that that will be loaded during the Linux startup process. `ENABLE_INITRAMFS` will automatically get enabled if `ENABLE_CRYPTFS`=true. This parameter will be ignored if `BUILD_KERNEL`=false.
261 260
262 261 ##### `ENABLE_IFNAMES`=true
263 262 Enable automatic assignment of predictable, stable network interface names for all local Ethernet, WLAN interfaces. This might create complex and long interface names.
264 263
265 264 ##### `DISABLE_UNDERVOLT_WARNINGS`=
266 265 Disable RPi2/3 under-voltage warnings and overlays. Setting the parameter to `1` will disable the warning overlay. Setting it to `2` will additionally allow RPi2/3 turbo mode when low-voltage is present.
267 266
268 267 ---
269 268
270 269 #### SSH settings:
271 270 ##### `SSH_ENABLE_ROOT`=false
272 Enable password root login via SSH. This may be a security risk with default password, use only in trusted environments. `ENABLE_ROOT` must be set to `true`.
271 Enable password-based root login via SSH. This may be a security risk with the default password set, use only in trusted environments. `ENABLE_ROOT` must be set to `true`.
273 272
274 273 ##### `SSH_DISABLE_PASSWORD_AUTH`=false
275 Disable password based SSH authentication. Only public key based SSH (v2) authentication will be supported.
274 Disable password-based SSH authentication. Only public key based SSH (v2) authentication will be supported.
276 275
277 276 ##### `SSH_LIMIT_USERS`=false
278 277 Limit the users that are allowed to login via SSH. Only allow user `USER_NAME`=pi and root if `SSH_ENABLE_ROOT`=true to login. This parameter will be ignored if `dropbear` SSH is used (`REDUCE_SSHD`=true).
279 278
280 279 ##### `SSH_ROOT_PUB_KEY`=""
281 280 Add SSH (v2) public key(s) from specified file to `authorized_keys` file to enable public key based SSH (v2) authentication of user `root`. The specified file can also contain multiple SSH (v2) public keys. SSH protocol version 1 is not supported. `ENABLE_ROOT` **and** `SSH_ENABLE_ROOT` must be set to `true`.
282 281
283 282 ##### `SSH_USER_PUB_KEY`=""
284 283 Add SSH (v2) public key(s) from specified file to `authorized_keys` file to enable public key based SSH (v2) authentication of user `USER_NAME`=pi. The specified file can also contain multiple SSH (v2) public keys. SSH protocol version 1 is not supported.
285 284
286 285 ---
287 286
288 287 #### Kernel compilation:
289 288 ##### `BUILD_KERNEL`=true
290 289 Build and install the latest RPi 0/1/2/3 Linux kernel. Currently only the default RPi 0/1/2/3 kernel configuration is used.
291 290
292 291 ##### `CROSS_COMPILE`="arm-linux-gnueabihf-"
293 This sets the cross compile enviornment for the compiler.
292 This sets the cross-compile environment for the compiler.
294 293
295 294 ##### `KERNEL_ARCH`="arm"
296 295 This sets the kernel architecture for the compiler.
297 296
298 297 ##### `KERNEL_IMAGE`="kernel7.img"
299 298 Name of the image file in the boot partition. If not set, `KERNEL_IMAGE` will be set to "kernel8.img" automatically if building for arm64.
300 299
301 300 ##### `KERNEL_BRANCH`=""
302 301 Name of the requested branch from the GIT location for the RPi Kernel. Default is using the current default branch from the GIT site.
303 302
304 303 ##### `QEMU_BINARY`="/usr/bin/qemu-arm-static"
305 304 Sets the QEMU enviornment for the Debian archive. If not set, `QEMU_BINARY` will be set to "/usr/bin/qemu-aarch64-static" automatically if building for arm64.
306 305
307 306 ##### `KERNEL_DEFCONFIG`="bcm2709_defconfig"
308 307 Sets the default config for kernel compiling. If not set, `KERNEL_DEFCONFIG` will be set to "bcmrpi3\_defconfig" automatically if building for arm64.
309 308
310 309 ##### `KERNEL_REDUCE`=false
311 Reduce the size of the generated kernel by removing unwanted device, network and filesystem drivers (experimental).
310 Reduce the size of the generated kernel by removing unwanted devices, network and filesystem drivers (experimental).
312 311
313 312 ##### `KERNEL_THREADS`=1
314 313 Number of parallel kernel building threads. If the parameter is left untouched the script will automatically determine the number of CPU cores to set the number of parallel threads to speed the kernel compilation.
315 314
316 315 ##### `KERNEL_HEADERS`=true
317 Install kernel headers with built kernel.
316 Install kernel headers with the built kernel.
318 317
319 318 ##### `KERNEL_MENUCONFIG`=false
320 319 Start `make menuconfig` interactive menu-driven kernel configuration. The script will continue after `make menuconfig` was terminated.
321 320
322 321 ##### `KERNEL_OLDDEFCONFIG`=false
323 322 Run `make olddefconfig` to automatically set all new kernel configuration options to their recommended default values.
324 323
325 324 ##### `KERNEL_CCACHE`=false
326 325 Compile the kernel using ccache. This speeds up kernel recompilation by caching previous compilations and detecting when the same compilation is being done again.
327 326
328 327 ##### `KERNEL_REMOVESRC`=true
329 328 Remove all kernel sources from the generated OS image after it was built and installed.
330 329
331 330 ##### `KERNELSRC_DIR`=""
332 331 Path to a directory (`linux`) of [RaspberryPi Linux kernel sources](https://github.com/raspberrypi/linux) that will be copied, configured, build and installed inside the chroot.
333 332
334 333 ##### `KERNELSRC_CLEAN`=false
335 334 Clean the existing kernel sources directory `KERNELSRC_DIR` (using `make mrproper`) after it was copied to the chroot and before the compilation of the kernel has started. This parameter will be ignored if no `KERNELSRC_DIR` was specified or if `KERNELSRC_PREBUILT`=true.
336 335
337 336 ##### `KERNELSRC_CONFIG`=true
338 337 Run `make bcm2709_defconfig` (and optional `make menuconfig`) to configure the kernel sources before building. This parameter is automatically set to `true` if no existing kernel sources directory was specified using `KERNELSRC_DIR`. This parameter is ignored if `KERNELSRC_PREBUILT`=true.
339 338
340 339 ##### `KERNELSRC_USRCONFIG`=""
341 340 Copy own config file to kernel `.config`. If `KERNEL_MENUCONFIG`=true then running after copy.
342 341
343 342 ##### `KERNELSRC_PREBUILT`=false
344 343 With this parameter set to true the script expects the existing kernel sources directory to be already successfully cross-compiled. The parameters `KERNELSRC_CLEAN`, `KERNELSRC_CONFIG`, `KERNELSRC_USRCONFIG` and `KERNEL_MENUCONFIG` are ignored and no kernel compilation tasks are performed.
345 344
346 345 ##### `RPI_FIRMWARE_DIR`=""
347 346 The directory (`firmware`) containing a local copy of the firmware from the [RaspberryPi firmware project](https://github.com/raspberrypi/firmware). Default is to download the latest firmware directly from the project.
348 347
349 348 ---
350 349
351 350 #### Reduce disk usage:
352 351 The following list of parameters is ignored if `ENABLE_REDUCE`=false.
353 352
354 353 ##### `REDUCE_APT`=true
355 354 Configure APT to use compressed package repository lists and no package caching files.
356 355
357 356 ##### `REDUCE_DOC`=true
358 357 Remove all doc files (harsh). Configure APT to not include doc files on future `apt-get` package installations.
359 358
360 359 ##### `REDUCE_MAN`=true
361 360 Remove all man pages and info files (harsh). Configure APT to not include man pages on future `apt-get` package installations.
362 361
363 362 ##### `REDUCE_VIM`=false
364 363 Replace `vim-tiny` package by `levee` a tiny vim clone.
365 364
366 365 ##### `REDUCE_BASH`=false
367 366 Remove `bash` package and switch to `dash` shell (experimental).
368 367
369 368 ##### `REDUCE_HWDB`=true
370 369 Remove PCI related hwdb files (experimental).
371 370
372 371 ##### `REDUCE_SSHD`=true
373 372 Replace `openssh-server` with `dropbear`.
374 373
375 374 ##### `REDUCE_LOCALE`=true
376 375 Remove all `locale` translation files.
377 376
378 377 ---
379 378
380 379 #### Encrypted root partition:
381 380 ##### `ENABLE_CRYPTFS`=false
382 381 Enable full system encryption with dm-crypt. Setup a fully LUKS encrypted root partition (aes-xts-plain64:sha512) and generate required initramfs. The /boot directory will not be encrypted. This parameter will be ignored if `BUILD_KERNEL`=false. `ENABLE_CRYPTFS` is experimental. SSH-to-initramfs is currently not supported but will be soon - feel free to help.
383 382
384 383 ##### `CRYPTFS_PASSWORD`=""
385 384 Set password of the encrypted root partition. This parameter is mandatory if `ENABLE_CRYPTFS`=true.
386 385
387 386 ##### `CRYPTFS_MAPPING`="secure"
388 387 Set name of dm-crypt managed device-mapper mapping.
389 388
390 389 ##### `CRYPTFS_CIPHER`="aes-xts-plain64:sha512"
391 390 Set cipher specification string. `aes-xts*` ciphers are strongly recommended.
392 391
393 392 ##### `CRYPTFS_XTSKEYSIZE`=512
394 393 Sets key size in bits. The argument has to be a multiple of 8.
395 394
396 395 ---
397 396
398 397 #### Build settings:
399 398 ##### `BASEDIR`=$(pwd)/images/${RELEASE}
400 399 Set a path to a working directory used by the script to generate an image.
401 400
402 401 ##### `IMAGE_NAME`=${BASEDIR}/${DATE}-${KERNEL_ARCH}-${KERNEL_BRANCH}-rpi${RPI_MODEL}-${RELEASE}-${RELEASE_ARCH}
403 402 Set a filename for the output file(s). Note: the script will create $IMAGE_NAME.img if `ENABLE_SPLITFS`=false or $IMAGE_NAME-frmw.img and $IMAGE_NAME-root.img if `ENABLE_SPLITFS`=true. Note 2: If the KERNEL_BRANCH is not set, the word "CURRENT" is used.
404 403
405 404 ## Understanding the script
406 405 The functions of this script that are required for the different stages of the bootstrapping are split up into single files located inside the `bootstrap.d` directory. During the bootstrapping every script in this directory gets executed in lexicographical order:
407 406
408 407 | Script | Description |
409 408 | --- | --- |
410 409 | `10-bootstrap.sh` | Debootstrap basic system |
411 410 | `11-apt.sh` | Setup APT repositories |
412 411 | `12-locale.sh` | Setup Locales and keyboard settings |
413 412 | `13-kernel.sh` | Build and install RPi 0/1/2/3 Kernel |
414 413 | `14-fstab.sh` | Setup fstab and initramfs |
415 414 | `15-rpi-config.sh` | Setup RPi 0/1/2/3 config and cmdline |
416 415 | `20-networking.sh` | Setup Networking |
417 416 | `21-firewall.sh` | Setup Firewall |
418 417 | `30-security.sh` | Setup Users and Security settings |
419 418 | `31-logging.sh` | Setup Logging |
420 419 | `32-sshd.sh` | Setup SSH and public keys |
421 420 | `41-uboot.sh` | Build and Setup U-Boot |
422 421 | `42-fbturbo.sh` | Build and Setup fbturbo Xorg driver |
423 422 | `43-videocore.sh` | Build and Setup videocore libraries |
424 423 | `50-firstboot.sh` | First boot actions |
425 424 | `99-reduce.sh` | Reduce the disk space usage |
426 425
427 426 All the required configuration files that will be copied to the generated OS image are located inside the `files` directory. It is not recommended to modify these configuration files manually.
428 427
429 428 | Directory | Description |
430 429 | --- | --- |
431 430 | `apt` | APT management configuration files |
432 431 | `boot` | Boot and RPi 0/1/2/3 configuration files |
433 432 | `dpkg` | Package Manager configuration |
434 433 | `etc` | Configuration files and rc scripts |
435 434 | `firstboot` | Scripts that get executed on first boot |
436 435 | `initramfs` | Initramfs scripts |
437 436 | `iptables` | Firewall configuration files |
438 437 | `locales` | Locales configuration |
439 438 | `modules` | Kernel Modules configuration |
440 439 | `mount` | Fstab configuration |
441 440 | `network` | Networking configuration files |
442 441 | `sysctl.d` | Swapping and Network Hardening configuration |
443 442 | `xorg` | fbturbo Xorg driver configuration |
444 443
445 444 ## Custom packages and scripts
446 445 Debian custom packages, i.e. those not in the debian repositories, can be installed by placing them in the `packages` directory. They are installed immediately after packages from the repositories are installed. Any dependencies listed in the custom packages will be downloaded automatically from the repositories. Do not list these custom packages in `APT_INCLUDES`.
447 446
448 447 Scripts in the custom.d directory will be executed after all other installation is complete but before the image is created.
449 448
450 449 ## Logging of the bootstrapping process
451 450 All information related to the bootstrapping process and the commands executed by the `rpi23-gen-image.sh` script can easily be saved into a logfile. The common shell command `script` can be used for this purpose:
452 451
453 452 ```shell
454 453 script -c 'APT_SERVER=ftp.de.debian.org ./rpi23-gen-image.sh' ./build.log
455 454 ```
456 455
457 456 ## Flashing the image file
458 457 After the image file was successfully created by the `rpi23-gen-image.sh` script it can be copied to the microSD card that will be used by the RPi 0/1/2/3 computer. This can be performed by using the tools `bmaptool` or `dd`. Using `bmaptool` will probably speed-up the copy process because `bmaptool` copies more wisely than `dd`.
459 458
460 459 ##### Flashing examples:
461 460 ```shell
462 461 bmaptool copy ./images/buster/2017-01-23-rpi3-buster.img /dev/mmcblk0
463 462 dd bs=4M if=./images/buster/2017-01-23-rpi3-buster.img of=/dev/mmcblk0
464 463 ```
465 464 If you have set `ENABLE_SPLITFS`, copy the `-frmw` image on the microSD card, then the `-root` one on the USB drive:
466 465 ```shell
467 466 bmaptool copy ./images/buster/2017-01-23-rpi3-buster-frmw.img /dev/mmcblk0
468 467 bmaptool copy ./images/buster/2017-01-23-rpi3-buster-root.img /dev/sdc
469 468 ```
470 469
471 470 ## QEMU emulation
472 471 Start QEMU full system emulation:
473 472 ```shell
474 473 qemu-system-arm -m 2048M -M vexpress-a15 -cpu cortex-a15 -kernel kernel7.img -no-reboot -dtb vexpress-v2p-ca15_a7.dtb -sd ${IMAGE_NAME}.qcow2 -append "root=/dev/mmcblk0p2 rw rootfstype=ext4 console=tty1"
475 474 ```
476 475
477 476 Start QEMU full system emulation and output to console:
478 477 ```shell
479 478 qemu-system-arm -m 2048M -M vexpress-a15 -cpu cortex-a15 -kernel kernel7.img -no-reboot -dtb vexpress-v2p-ca15_a7.dtb -sd ${IMAGE_NAME}.qcow2 -append "root=/dev/mmcblk0p2 rw rootfstype=ext4 console=ttyAMA0,115200 init=/bin/systemd" -serial stdio
480 479 ```
481 480
482 481 Start QEMU full system emulation with SMP and output to console:
483 482 ```shell
484 483 qemu-system-arm -m 2048M -M vexpress-a15 -cpu cortex-a15 -smp cpus=2,maxcpus=2 -kernel kernel7.img -no-reboot -dtb vexpress-v2p-ca15_a7.dtb -sd ${IMAGE_NAME}.qcow2 -append "root=/dev/mmcblk0p2 rw rootfstype=ext4 console=ttyAMA0,115200 init=/bin/systemd" -serial stdio
485 484 ```
486 485
487 486 Start QEMU full system emulation with cryptfs, initramfs and output to console:
488 487 ```shell
489 488 qemu-system-arm -m 2048M -M vexpress-a15 -cpu cortex-a15 -kernel kernel7.img -no-reboot -dtb vexpress-v2p-ca15_a7.dtb -sd ${IMAGE_NAME}.qcow2 -initrd "initramfs-${KERNEL_VERSION}" -append "root=/dev/mapper/secure cryptdevice=/dev/mmcblk0p2:secure rw rootfstype=ext4 console=ttyAMA0,115200 init=/bin/systemd" -serial stdio
490 489 ```
491 490
492 491 ## External links and references
493 492 * [Debian worldwide mirror sites](https://www.debian.org/mirror/list)
494 493 * [Debian Raspberry Pi 2 Wiki](https://wiki.debian.org/RaspberryPi2)
495 494 * [Debian CrossToolchains Wiki](https://wiki.debian.org/CrossToolchains)
496 495 * [Official Raspberry Pi Firmware on github](https://github.com/raspberrypi/firmware)
497 496 * [Official Raspberry Pi Kernel on github](https://github.com/raspberrypi/linux)
498 497 * [U-BOOT git repository](https://git.denx.de/?p=u-boot.git;a=summary)
499 498 * [Xorg DDX driver fbturbo](https://github.com/ssvb/xf86-video-fbturbo)
500 499 * [RPi3 Wireless interface firmware](https://github.com/RPi-Distro/firmware-nonfree/tree/master/brcm80211/brcm)
501 500 * [Collabora RPi2 Kernel precompiled](https://repositories.collabora.co.uk/debian/)
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