Ubuntu Platform, part two.

pimvanpelt commented 5 years ago

Part two of the Ubuntu platform.

Added mgos_uptime_micros()
Added ability to Makefile to build lib.a
- Also correctly sequence generated files before app sources (so mgos_config.ch exist)
Mongoose now runs in a child process, separated from the main process.
- Added an IPC socketpair between main and mongoose
- When Mongoose chroot()s, it uses IPC to open files in the host filesystem
- Mongoose WDT updates the main process
- Main process will terminate mongoose on WDT timeout.
Added capabilities (cap_sys_chroot and cap_net_bind_service)
Drop privileges in Mongoose task after chroot()ing.
- The application can run as root, in which case privs are dropped upon start
- The application can run as user with capabilities cap_sys_chroot,cap_net_bind_service+ep
Add required flags (user, group, chroot) for the main application.
Add LOGM() with a color coding to distinguish mongoose logging from main logging.
Switch to clang-format.

The project is now able to compile mongoose and i2c lib.a correctly.

rm -rf build/
mos build --no-platform-check --local --verbose --platform ubuntu
sudo setcap "cap_sys_chroot,cap_net_bind_service+ep" build/bin/empty
build/bin/empty 

main                 PIDs: parent=15671 child=15672 uid=1000 gid=1000 euid=1000 egid=1000
ubuntu_cap_init      Setting chroot=/home/pim/src/empty/build/fs
ubuntu_cap_init      pid=15672 uid=1000 gid=1000 euid=1000 egid=1000
mongoose_init        Mongoose OS 201901241501 (20190124-150158/2.10.2-43-g038f7765-master)
mongoose_init        empty 1.0 (20190124-150158/2.10.0-dirty-master-g01d3f5b73)
mongoose_init        CPU: 1605 MHz, heap: 16799997952 total, 5432848384 free
mongoose_init        Network: ip=194.126.235.37 netmask=255.255.255.240 gateway=194.126.235.33
mgos_hw_timers_init  Not implemented yet
mgos_vfs_common_init Not implemented yet
mgos_core_fs_init    Not implemented yet
mgos_gpio_hal_init   Not implemented yet
mgos_sys_config_init MAC: 0002C94F0668
mgos_sys_config_init WDT: 30 seconds
mgos_deps_init       init i2c...
mgos_i2c_create      I2C init ok (dev: /dev/i2c-6, freq: 100000)
mgos_init            Init done, RAM: 16799997952 total, 5432848384 free, 0 min free
mgos_event_trigger   ev MOS0 triggered 0 handlers
app_cb               counter=1 uptime=1019778
i2cscan              Found device at I2C address 0x48

pimvanpelt commented 5 years ago

Perhaps hold off on review/merging this. There are still some issues with generating artifacts (like json0.conf and a complete config schema). Will ping once I made more progress.

pimvanpelt commented 5 years ago

Ready to merge. PTAL @rojer

pimvanpelt commented 5 years ago

5eb7cae needs a release of mgos/ubuntu-build:r2 as we're now linking in libcap, and I've made it a static executable for portabliity so users do not need to install libcap-dev Ubuntu package on their host.

rojer commented 5 years ago

integrating this now, thanks a lot!

rojer commented 5 years ago

https://github.com/cesanta/mongoose-os/commit/324ab2516a41196ac55d6ee15e39ac07374e7e66

cesanta / mongoose-os

Ubuntu Platform, part two. #476