Bug#412690: tomcat5.5: jsvc problem

[ROBERTOJIMENOCA at terra.es]

Michael Koch wrote:
> On Tue, May 06, 2008 at 03:28:47PM +0200, ROBERTOJIMENOCA at terra.es wrote:
> > As Peter points out it is probably a jsvc problem but I was not able to make it run by running dpkg-buildpackage on jsvc and reinstalling.
> 
> I hunted the issue down to being caused by linux-libc-dev. When
> compiling againt linux-libc-dev 2.6.24-6 it works, when building against
> 2.6.25-1 it doesn't. The capability.h header changed a lot. We have to
> check how that influences jsvc.

I found out this thread at linux-kernel mailing list:
2.6.25 Kernel - Problems with capabilities
http://marc.info/?t=120863077600002

I also saw at the capset man page:
> These two functions are the raw kernel interface for getting  and set-
> ting  capabilities.  Not only are these system calls specific to Linux,
> but the kernel API is likely to change and use of these functions  (in
> particular  the  format of the cap_user_*_t types) is subject to change
> with each kernel revision.
> 
> The portable interfaces are  cap_set_proc(3)  and cap_get_proc(3);  if
> possible  you should use those interfaces in applications.  If you wish
> to use the Linux extensions in applications, you should use the easier-
> to-use interfaces capsetp(3) and capgetp(3).

So at commons-daemon-1.0.2~svn20061127/src/native/unix/native/jsvc-unix.c
    if (syscall(__NR_capset, &caphead, &cap) < 0) {
may not be the supported interface to set capabilities.



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