Most C and Posix API clobber errno. By failing to save
it immediately after invoking an API we risk simply
reporting the result of an arbitrary subsequent API call.
This adds LOG_SYS_ERRNO to take errno explicitly.
This is necessary because sometimes logging is not done
immediately after calling the function for which we
want to report errno. Similarly, log macros that log
errno need to save errno before calling any functions.
This is necessary as the argements might contain calls
that clobber errno.
This also converts some LOG_SYS entries to LOG_ERR
because there can be no relevant errno in that context
(f.e. in a catch clause).
A couple of LOG_ macros have been folded into others,
reducing redundancy.
Finally, both of these log macros append errno to the
log message, so there is little point in ending the
messages with a period.
Change-Id: Iecc656f67115fec78b65cad4e7c17a17623ecf43
Signed-off-by: Ashod Nakashian <ashod.nakashian@collabora.co.uk>
01138d7ae0