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/* Support code for dealing with priorities in the Hurd.
Copyright (C) 1994, 1995 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA. */
#include <hurd/resource.h>
#include <hurd.h>
error_t
_hurd_priority_which_map (enum __priority_which which, int who,
error_t (*function) (pid_t, struct procinfo *),
int pi_flags)
{
mach_msg_type_number_t npids = 64, i;
pid_t pidbuf[npids], *pids;
error_t err;
struct procinfo *pip;
int pibuf[sizeof *pip + 5 * sizeof (pip->threadinfos[0])], *pi = pibuf;
mach_msg_type_number_t pisize = sizeof (pibuf) / sizeof (int);
switch (which)
{
case PRIO_PROCESS:
npids = 1;
pids[0] = who;
err = 0;
break;
case PRIO_PGRP:
err = __USEPORT (PROC, __proc_getpgrppids (port, who, &pids, &npids));
break;
case PRIO_USER:
err = __USEPORT (PROC, __proc_getallpids (port, &pids, &npids));
break;
default:
return EINVAL;
}
for (i = 0; !err && i < npids; ++i)
{
if (which == PRIO_USER)
{
/* Get procinfo to check the owner. */
int *oldpi = pi;
mach_msg_type_number_t oldpisize = pisize;
char *tw = 0;
size_t twsz = 0;
if (err = __USEPORT (PROC, __proc_getprocinfo (port, pids[i],
pi_flags,
&pi, &pisize,
&tw, &twsz)))
continue;
if (twsz)
/* Gratuitous. */
__vm_deallocate (__mach_task_self (), (vm_address_t) tw, twsz);
if (pi != oldpi && oldpi != pibuf)
/* Old buffer from last call was not reused; free it. */
__vm_deallocate (__mach_task_self (),
(vm_address_t) oldpi, oldpisize * sizeof pi[0]);
pip = (struct procinfo *) pi;
if (pip->owner != (uid_t) who)
continue;
}
else
pip = NULL;
err = (*function) (pids[i], pip);
}
if (pids != pidbuf)
__vm_deallocate (__mach_task_self (),
(vm_address_t) pids, npids * sizeof pids[0]);
if (pi != pibuf)
__vm_deallocate (__mach_task_self (),
(vm_address_t) pi, pisize * sizeof pi[0]);
return err;
}
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