tree 387d75907acd2d793c5e58910792a0508911aebf
parent 0df80a1defa16686bc9ac3f61c2cd87b6ab60219
author Zhikui Ren <zhikui.ren@intel.com> 1704238531 -0800
committer Zhikui Ren <zhikui.ren@intel.com> 1704385717 +0000

hwmontempsensor: Handle failure to canonicalize device path

std::filestream::canonical(const std::filesystem::path& p) can throw
exception if the path does not exist. hwmontempsensor would crash with:
what():  filesystem error: cannot make canonical path:
No such file or directory [/sys/class/hwmon/hwmon38/device]

Replace with canonical(const std::filesystem::path& p,
std::error_code& ec) which captures error code without exception.

This call still may throw std::bad_alloc if memory allocation fails.
But there is no good way to resolve system OOM from this service,
leave it unhandled and let the service exit.

Tested:
Same hwmontemp sensors are created with the change.

Signed-off-by: Zhikui Ren <zhikui.ren@intel.com>
Change-Id: I0cf98950faf44b35dc71387a653ba1feeb375cc1