3rd-party/linux-kernel-module-cheat
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Fix init environment code examples

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Likely not updated after --kernel-cli-after-dash was added.

Prompted by: https://github.com/cirosantilli/linux-kernel-module-cheat/issues/120
This commit is contained in:
Ciro Santilli 六四事件 法轮功
2020-03-25 00:00:00 +00:00
parent 69f5745d3d
commit c5aeb1791c
2 changed files with 12 additions and 3 deletions
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13
README.adoc
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@@ -3130,10 +3130,16 @@ ____
And you can try it out with: And you can try it out with:
.... ....
./run --kernel-cli 'init=/lkmc/linux/init_env_poweroff.out - asdf=qwer zxcv' ./run --kernel-cli 'init=/lkmc/linux/init_env_poweroff.out' --kernel-cli-after-dash 'asdf=qwer zxcv'
.... ....
Output: From the <<dry-run,generated QEMU command>>, we see that the kernel CLI at LKMC 69f5745d3df11d5c741551009df86ea6c61a09cf now contains:
....
init=/lkmc/linux/init_env_poweroff.out console=ttyS0 - lkmc_home=/lkmc asdf=qwer zxcv
....
and the init program outputs:
.... ....
args: args:
@@ -3144,6 +3150,7 @@ zxcv
env: env:
HOME=/ HOME=/
TERM=linux TERM=linux
lkmc_home=/lkmc
asdf=qwer asdf=qwer
.... ....
@@ -3156,7 +3163,7 @@ The annoying dash `-` gets passed as a parameter to `init`, which makes it impos
Arguments with dots that come after `-` are still treated specially (of the form `subsystem.somevalue`) and disappear, from args, e.g.: Arguments with dots that come after `-` are still treated specially (of the form `subsystem.somevalue`) and disappear, from args, e.g.:
.... ....
./run --kernel-cli 'init=/lkmc/linux/init_env_poweroff.out - /lkmc/linux/poweroff.out' ./run --kernel-cli 'init=/lkmc/linux/init_env_poweroff.out' --kernel-cli-after-dash '/lkmc/linux/poweroff.out'
.... ....
outputs: outputs:

2
run
View File

@@ -172,6 +172,7 @@ Pass an extra Linux kernel command line options, and place them before
the dash separator `-`. Only options that come before the `-`, i.e. the dash separator `-`. Only options that come before the `-`, i.e.
"standard" options, should be passed with this option. "standard" options, should be passed with this option.
Example: `./run --arch arm --kernel-cli 'init=/lkmc/poweroff.out'` Example: `./run --arch arm --kernel-cli 'init=/lkmc/poweroff.out'`
See also: https://cirosantilli.com/linux-kernel-module-cheat#init-environment
''' '''
) )
self.add_argument( self.add_argument(
@@ -182,6 +183,7 @@ separator, and place the options after the dash. Intended for custom
options understood by our `init` scripts, most of which are prefixed options understood by our `init` scripts, most of which are prefixed
by `lkmc_`. by `lkmc_`.
Example: `./run --kernel-cli-after-dash 'lkmc_eval="wget google.com" lkmc_lala=y'` Example: `./run --kernel-cli-after-dash 'lkmc_eval="wget google.com" lkmc_lala=y'`
See also: https://cirosantilli.com/linux-kernel-module-cheat#init-environment
''' '''
) )
self.add_argument( self.add_argument(