On Thu, 9 Sep 2021 08:25:44 GMT, Wu Yan <wu...@openjdk.org> wrote: >> Hi, >> Please help me review the change to enhance getting time zone ID from >> /etc/localtime on linux. >> >> We use `realpath` instead of `readlink` to obtain the link name of >> /etc/localtime, because `readlink` can only read the value of a symbolic of >> link, not the canonicalized absolute pathname. >> >> For example, the value of /etc/localtime is >> "../usr/share/zoneinfo//Asia/Shanghai", then the linkbuf obtained by >> `readlink` is "../usr/share/zoneinfo//Asia/Shanghai", and then the call of >> `getZoneName(linkbuf)` will get "/Asia/Shanghai", not "Asia/Shanghai", which >> consider as invalid in `ZoneInfoFile.getZoneInfo()`. Using `realpath`, you >> can get “/usr/share/zoneinfo/Asia/Shanghai“ directly from “/etc/localtime“. >> >> Thanks, >> wuyan > > Wu Yan has updated the pull request incrementally with one additional commit > since the last revision: > > replace realpath
Hi, we directly process the characters in `linkbuf` instead of realpath. And we reuse [collapse()](https://github.com/openjdk/jdk/blob/master/src/java.base/unix/native/libjava/canonicalize_md.c#L129) to process the '.' and '..' in `linkbuf`. We tested some cases about /etc/localtime, and it works well. Test cases and results are in the attachment. [testcase.log](https://github.com/openjdk/jdk/files/7135028/testcase.log) [result.log](https://github.com/openjdk/jdk/files/7135030/result.log) ------------- PR: https://git.openjdk.java.net/jdk/pull/5327
