RFC: Leverage errno everywhere, like libmnl, and use err() and warn() helper functions #2
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This is a proposal to leverage errno more and propagate errors back to the user with the classic
err()andwarn()family of BSD functions. They format error/warn messages as:"progname: your formatted string: %s", your args, strerror(errno), thus providing a consistent error or warning style to the program.Note: this patch overlaps overlaps with the previous segfault patch submitted earlier.