jsvc fails to load libcap.so.2 from /lib64
------------------------------------------
Key: DAEMON-246
URL: https://issues.apache.org/jira/browse/DAEMON-246
Project: Commons Daemon
Issue Type: Bug
Components: Jsvc
Affects Versions: 1.0.10
Environment: Fedora Core 16 (x86_64, using an x86_64 jsvc), CentOS 5.5
(x86_86, using an x86_64 jsvc), Debian Squeeze (x86_64, using an i686 jsvc),
Debian Wheezy (x86_64, using an i686 jsvc)
Reporter: Emily Middleton
I see this when running jsvc -debug ...
Attemtping to load library /lib/libcap.so.2
Attemtping to load library /lib/libcap.so.1
Attemtping to load library /lib/libcap.so
Attemtping to load library /usr/lib/libcap.so.2
Attemtping to load library /usr/lib/libcap.so.1
Attemtping to load library /usr/lib/libcap.so
failed loading capabilities library -- /usr/lib/libcap.so: cannot open shared
object file: No such file or directory.
This does not work on 64bit Fedora, as the lib directory is /lib64/.
It also won't work if you're using a 32bit copy of jsvc on a 64bit copy of
Debian, which has a similar problem (the 32bit copy of libcap.so.2 is found at
/lib32/libcap.so.2).
These alternative library locations are mentioned in the Linux filesystem
hierarchy standard
(http://refspecs.linuxfoundation.org/FHS_2.3/fhs-2.3.html#LIBLTQUALGTALTERNATEFORMATESSENTIAL).
The hard-coded /lib and /usr/lib paths in jsvc are counter-productive in the
environments mentioned, and also in environments where the user expects to be
able to control the library search path with the LD_LIBRARY_PATH environment
variable. jsvc should be utilising the normal ld.so search path. This can be
achieved even with a desire to be able to load either version 1 or 2 of libcap
(as requested in https://issues.apache.org/jira/browse/DAEMON-234) because you
don't need to give a full path to dlopen, according to its man page on Linux:
"If filename contains a slash ("/"), then it is interpreted as a (relative or
absolute) pathname. Otherwise, the dynamic linker searches for the library as
follows ... (see ld.so(8) for further details)"
So the issue can be resolved by simply making libcap_locs contain the desired
filenames rather than pathnames. Patch will be attached shortly.
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators:
https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira
