tree-wide: remove Emacs lines from all files This should be handled fine now by .dir-locals.el, so need to carry that stuff in every file.

tree-wide: check if errno is greater than zero (2) Compare errno with zero in a way that tells gcc that (if the condition is true) errno is positive.

basic: re-sort includes My previous patch to only include what we use accidentially placed the added inlcudes in non-sorted order.

basic: include only what we use This is a cleaned up result of running iwyu but without forward declarations on src/basic.

calendarspec: sub-second support, v3

parse-util: really refuse parsing negative values as positive ones, even on x86-32 strtoull() doesn't make it particularly easy to detect passed-in negative numbers, as it silently converts them to positive ones without generating any error. Since we are not interested in negative values we should hence explicitly filter them out by looking at the string directly and returning ERANGE if we see a leading "-". Fixes: #1829

parse-util: introduce parse_ifindex() and make use of it everywhere We have enough places where we parse an ifindex, hence introduce a proper parsing function for it, that verifies all parameters.

parse-util: Introduce new parse_range function This function will be useful for CPUAffinity settings that involve ranges of CPUs. Make it generic and include test coverage to prevent regressions.

util-lib: split string parsing related calls from util.[ch] into parse-util.[ch]