I'd approach it this way: set -e # exit on error cd "$(dirname "$0")"
Hostile symbolic links in a user's install directory should only be a problem on shared machines with irresponsible users. That said, I suppose this could be an issue on a college campus, so perhaps the cd line should be: cd -P "$(dirname "$0")" I think all posix shells support the -P option for cd. FYI, -- Raul On Thu, Mar 2, 2023 at 6:06 AM bill lam <bbill....@gmail.com> wrote: > > I think that readlink is not guaranteed to be installed by default on linux > or other *nix. > > On Thu, 2 Mar 2023 at 6:34 PM 'Viktor Grigorov' via Programming < > programm...@jsoftware.com> wrote: > > > Minor quip: the shell script in the general linux zip 'bin/install-usr.sh' > > should include this line near the top > > > > cd "$(dirname "$(readlink -f "$0")")" || exit; > > > > or one to the same same, I'm not familiar with posix sh word splitting so > > I overdo the quotes, hopefully not the opposite effect. This allows the > > script to run from without top level of the j dir. > > > > > > Mar 2, 2023, 08:38 by bbill....@gmail.com: > > > > > j9.4.1 for android is available at > > > > > > https://www.jsoftware.com/download/j9.4/install/ > > > > > > > > > > > > > > > On Thu, Mar 2, 2023 at 1:49 AM Eric Iverson <eric.b.iver...@gmail.com> > > > wrote: > > > > > >> j9.4.1 release is available! > > >> > > >> https://code.jsoftware.com/wiki/System/Installation/J9.4 > > >> > > >> Zip installs are there now and AIO/Debian/apk will be there shortly. > > >> > > >> Do a full install. You can do this on top of an existing j9.4 folder, > > but > > >> probably better to rename it out of the way and start with a clean > > slate. > > >> > > >> Name convention has changed (j904 -> j9.4), so the user folder is: > > >> j9.4-user. > > >> > > >> Do not just upgrade the JE as you did with the beta as this may not > > give a > > >> clean and complete installation. > > >> > > >> *** > > >> If you were on the beta journey you will know that this is a big step > > for > > >> J. > > >> > > >> J now has a threading model ready for serious use. This is going to take > > >> time to settle in, but is going to change the way we tackle some > > problems. > > >> > > >> Roger's original implementation of rationals and extended integers was > > >> always intended as a placeholder. Many years later, we have finally > > moved > > >> to GMP. No new capabilities, but the performance improvement can be a > > game > > >> changer. The hobby horse is now a work horse. > > >> > > >> Improved error messages will be appreciated by new users, but are also > > >> welcomed by old hands. This feature is extensible and will evolve. > > >> > > >> Release Notes are worth a look: > > >> https://code.jsoftware.com/wiki/System/ReleaseNotes/J9.4 > > >> > > >> This was a team effort and benefited from significant community > > >> participation. But we should all recognize the major contributions of a > > few > > >> individuals. > > >> > > >> Henry Rich (everything - especially threads) > > >> Raul Miller (GMP) > > >> Bill Lam (steady hand in everything - android/openbsd/freebsd) > > >> Elijah Stone (threads and error messages) > > >> Bill Heagy (testing/testing/testing - beyond value) > > >> ---------------------------------------------------------------------- > > >> For information about J forums see http://www.jsoftware.com/forums.htm > > >> > > > ---------------------------------------------------------------------- > > > For information about J forums see http://www.jsoftware.com/forums.htm > > > > > > > ---------------------------------------------------------------------- > > For information about J forums see http://www.jsoftware.com/forums.htm > > > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
