Hi, The algorithm that OpenJDK uses to guess the local timezone ID on Linux goes like this:
1. If TZ environment variable is set, use that 2. If /etc/timezone is readable, read the time zone from there 3. If /etc/localtime is a symlink, resolve that, and use the name to guess the time zone. 4. Scan /usr/share/zoneinfo for a file whose contents match the contents of /etc/localtime. Step 4 (if it is ever reached) is probably going to lead to incorrect results since there are a number of timezones that have the same zoneinfo data (such as Europe/London and Europe/Belfast). So it seems sensible to me to try and use additional sources to guess the timezone ID before resorting to file content comparisons. The webrev adds a step between 2 and 3 that reads and parses /etc/sysconfig/clock to extract the timezone: http://cr.openjdk.java.net/~omajid/webrevs/timezone-read-sysconfig-clock/00/ This file exists on some Red Hat Enterprise Linux (and derivative) distributions and contains contents that look this: > # The time zone of the system is defined by the contents of /etc/localtime. > # This file is only for evaluation by system-config-date, do not rely on its > # contents elsewhere. > ZONE="Europe/Zurich" With this, we should be able to identify the exact timezone ID. Thanks, Omair -- PGP Key: 66484681 (http://pgp.mit.edu/) Fingerprint = F072 555B 0A17 3957 4E95 0056 F286 F14F 6648 4681
