Rony,
On 4/21/21 08:53, Rony G. Flatscher (Apache) wrote:
Hi Chris,
On 20.04.2021 16:47, Christopher Schultz wrote:
... cut ...
When bringing non-Java binaries into the picture then they work in the process
environment where
e.g. PATH defines which directories are looked up for finding executables
(which might be important
for some natives) and on Windows DLLs, and in Linux and MacOS shared libraries
need to be found by
the non-Java native code. Hence the desire to allow setting up the process
environment before
starting up Tomcat in a simple, but effective way.
You may want to do a Google search for "java.library.path".
have been aware of (and using) "java.library.path" for quite some time, it does
not do for natives
what it does for the JVM. E.g. adding a path via something like
-Djava.library.path="%PATH%;x:\some\path" |
-Djava.library.path="${PATH}:/some/path"
does not change the process environment variable PATH accordingly (adding
"x:\some\path" |
"/some/path" to the PATH environment variable) such that a native library can
issue a command that
will be looked for in addition in "x:\some\path" | "/some/path" (just tested it
again on Windows
with Java 8).
Do you mean when you call exec() or similar (yuck!) or do you mean
loading dependencies for your native library? If you have native
dependencies for your shared library, you should also put them into the
java.library.path.
If you are calling exec() or system() or anything like that from your
Java code:
1. Don't
2. Don't use the PATH environment variable; always use full paths
However, with CATALINA_OPTS you brought the startup/stop|shutdown/catalina
scripts into the picture,
which might be a possible solution (though being very wary altering/tampering
such fundamental
scripts).
I didn't suggest that you modify those scripts. I only suggested that you use
an environment
variable that those scripts are aware of.
Typically, admins will create a bin/setenv.sh script which sets all environment
variables
necessary for local operation. You could even change the PATH variable -- if
you really want to do
that -- there.
Thank you very much for this pointer, seeing "setenv.{sh|bat}" being exercised
in the Tomcat
supplied scripts, if it exists!
That's why it's there.
You can even set $PATH in there if you really want to.
-chris
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