[Dovecot] AIX: mntctl implementation for NFS quota support

[Timo Sirainen]

On Jul 5, 2008, at 10:39 PM, Ralf Becker wrote:

> I've added mntctl support to 'lib/mountpoint.c' today. My tests are  
> looking good and so I'd like to share the patch.
> While I'm still not really familiar with dovecots memory management,  
> I need someone who is familiar with it to have a look on my lines of  
> code. Especially the usage or p_new, t_strconcat and p_free should  
> be checked. :-)

I'd probably change the allocations a bit to avoid extra syscalls.  
Something like:

// guess that 256 bytes is enough usually. use larger value if it's not.
char mtab_static[256], *mtab = mtab_static;

count = mntctl(..);
while (count == 0) {
   mtab = t_malloc(size);
   count = mntctl(..);
}
if (count < 0) {
   i_error("mntctl() failed: %m");
   return -1;
}
..etc..

Also change to HAVE_SYS_VMOUNT_H.

> To activate the patch you have to add "#define HAVE_VMOUNT_H 1" do  
> 'config.h'. Maybe someone wants to alter configure* to do this  
> automatically?

Just add sys/vmount.h to AC_CHECK_HEADERS() list.
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