On 12/2/22 22:34, Sean Anderson wrote:
On 12/2/22 16:22, Marek Vasut wrote:
On 12/2/22 22:03, Sean Anderson wrote:
[...]
+Running Shell Commands +----------------------
+Normally, arbitrary U-Boot command execution is not enabled. This is so +fastboot can be used to update systems using verified boot. However, such +functionality can be useful for production or when verified boot is not in use. +Enable ``CONFIG_FASTBOOT_UUU_SUPPORT`` to use this functionality. This will +enable the ``UCmd`` and ``ACmd`` commands for use with UUU [3]_. It also +enables the ``oem run`` command, which can be used with the fastboot client. +For example, to print "Hello world", run::
+ $ fastboot oem run:echo Hello world
Does this also support more complex shell constructs, e.g. run:"echo hello ; echo world" ? Or how does one represent the ; in that command ?
Yes.
Does variable expansion and access work as it should ?
Yes. But it has to be escaped properly (for your shell).
Under the hood this just calls into run_command, and fastboot effectively does ' '.join(argv) for oem commands.
TBH I haven't dug into this too much, as I just need to run some basic commands for my intended use case.
It would be nice to have an example of how to run
fastboot oem run:echo Hello ; echo world
or
fastboot oem run:echo Hello && echo world
or
fastboot oem run:setenv Hello world ; echo $Hello
that should cover all the cases.