/* Copyright (C) 1994,95,96,97,2000,02 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 Lesser General Public   License as published by the Free Software Foundation; either   version 2.1 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   Lesser General Public License for more details.   You should have received a copy of the GNU Lesser General Public   License along with the GNU C Library; if not, write to the Free   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA   02111-1307 USA.  */#include <limits.h>#include <hurd.h>#include <hurd/resource.h>/* Return the highest priority of any process specified by WHICH and WHO   (see <sys/resource.h>); if WHO is zero, the current process, process group,   or user (as specified by WHO) is used.  A lower priority number means higher   priority.  Priorities range from PRIO_MIN to PRIO_MAX.  */intgetpriority (enum __priority_which which, id_t who){  error_t err, onerr;  int maxpri = INT_MIN;  struct procinfo *pip;		/* Just for sizeof.  */  int pibuf[sizeof *pip + 2 * sizeof (pip->threadinfos[0])], *pi = pibuf;  size_t pisize = sizeof pibuf / sizeof pibuf[0];  error_t getonepriority (pid_t pid, struct procinfo *pip)    {      if (pip)	onerr = 0;      else	{	  int *oldpi = pi;	  size_t oldpisize = pisize;	  char *tw = 0;	  size_t twsz = 0;	  int flags = PI_FETCH_TASKINFO;	  onerr = __USEPORT (PROC, __proc_getprocinfo (port, pid, &flags,						       &pi, &pisize,						       &tw, &twsz));	  if (twsz)	    __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;	}#ifdef TASK_SCHED_TIMESHARE_INFO      if (!onerr && pip->timeshare_base_info.base_priority > maxpri)	maxpri = pip->timeshare_base_info.base_priority;#else      if (!onerr && pip->taskinfo.base_priority > maxpri)	maxpri = pip->taskinfo.base_priority;#endif      return 0;    }  onerr = 0;  err = _hurd_priority_which_map (which, who,				  getonepriority, PI_FETCH_TASKINFO);  if (pi != pibuf)    __vm_deallocate (__mach_task_self (),		     (vm_address_t) pi, pisize * sizeof pi[0]);  if (!err && maxpri == INT_MIN)    /* No error, but no pids found.  */    err = onerr ?: ESRCH;  if (err)    return __hurd_fail (err);  return MACH_PRIORITY_TO_NICE (maxpri);}libc_hidden_def (getpriority)