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80b55d320b
PI_FETCH_TASKINFO to proc_getprocinfo and through _hurd_priority_which_map. * sysdeps/mach/hurd/setpriority.c (setpriority): Pass new arg to _hurd_priority_which_map. * hurd/hurdprio.c (_hurd_priority_which_map): New arg PI_FLAGS, passed through to proc_getprocinfo RPC. * hurd/hurd/resource.h: Add PI_FLAGS arg in decl.
86 lines
2.4 KiB
C
86 lines
2.4 KiB
C
/* Copyright (C) 1994, 1995 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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Cambridge, MA 02139, USA. */
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#include <hurd.h>
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#include <hurd/resource.h>
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/* Set the priority of all processes specified by WHICH and WHO
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to PRIO. Returns 0 on success, -1 on errors. */
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int
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setpriority (enum __priority_which which, int who, int prio)
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{
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error_t err;
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error_t pidloser, priloser;
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unsigned int npids, ntasks, nwin, nperm, nacces;
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error_t setonepriority (pid_t pid, struct procinfo *pi)
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{
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task_t task;
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error_t piderr = __USEPORT (PROC, __proc_pid2task (port, pid, &task));
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if (piderr == EPERM)
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++nperm;
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if (piderr != ESRCH)
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{
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++npids;
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if (piderr && piderr != EPERM)
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pidloser = piderr;
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}
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if (! piderr)
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{
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error_t prierr;
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++ntasks;
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prierr = __task_priority (task, NICE_TO_MACH_PRIORITY (prio), 1);
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__mach_port_deallocate (__mach_task_self (), task);
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switch (prierr)
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{
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case KERN_FAILURE:
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++nacces;
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break;
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case KERN_SUCCESS:
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++nwin;
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break;
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case KERN_INVALID_ARGUMENT: /* Task died. */
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--npids;
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--ntasks;
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break;
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default:
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priloser = prierr;
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}
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}
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return 0;
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}
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npids = ntasks = nwin = nperm = nacces = 0;
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pidloser = priloser = 0;
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err = _hurd_priority_which_map (which, who, setonepriority, 0);
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if (!err && npids == 0)
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/* No error, but no pids found. */
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err = ESRCH;
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else if (nperm == npids)
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/* Got EPERM from proc_task2pid for every process. */
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err = EPERM;
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else if (nacces == ntasks)
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/* Got KERN_FAILURE from task_priority for every task. */
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err = EACCES;
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else if (nwin == 0)
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err = pidloser ?: priloser;
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return err ? __hurd_fail (err) : 0;
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}
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