projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| b168057a | 1 | /* Copyright (C) 1994-2015 Free Software Foundation, Inc. |
| 478b92f0 | 2 | This file is part of the GNU C Library. |
| 28f540f4 | 3 | |
| 478b92f0 | 4 | The GNU C Library is free software; you can redistribute it and/or |
| 41bdb6e2 AJ |
5 | modify it under the terms of the GNU Lesser General Public |
| 6 | License as published by the Free Software Foundation; either | |
| 7 | version 2.1 of the License, or (at your option) any later version. | |
| 28f540f4 | 8 | |
| 478b92f0 UD |
9 | The GNU C Library is distributed in the hope that it will be useful, |
| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 41bdb6e2 | 12 | Lesser General Public License for more details. |
| 28f540f4 | 13 | |
| 41bdb6e2 | 14 | You should have received a copy of the GNU Lesser General Public |
| 59ba27a6 PE |
15 | License along with the GNU C Library; if not, see |
| 16 | <http://www.gnu.org/licenses/>. */ | |
| 28f540f4 RM |
17 | |
| 18 | #include <hurd.h> | |
| 19 | #include <hurd/resource.h> | |
| 20 | ||
| 21 | /* Set the priority of all processes specified by WHICH and WHO | |
| 22 | to PRIO. Returns 0 on success, -1 on errors. */ | |
| 23 | int | |
| 0ed99ce4 | 24 | setpriority (enum __priority_which which, id_t who, int prio) |
| 28f540f4 RM |
25 | { |
| 26 | error_t err; | |
| 27 | error_t pidloser, priloser; | |
| 28 | unsigned int npids, ntasks, nwin, nperm, nacces; | |
| 29 | ||
| 30 | error_t setonepriority (pid_t pid, struct procinfo *pi) | |
| 31 | { | |
| 32 | task_t task; | |
| 33 | error_t piderr = __USEPORT (PROC, __proc_pid2task (port, pid, &task)); | |
| 34 | if (piderr == EPERM) | |
| 35 | ++nperm; | |
| 36 | if (piderr != ESRCH) | |
| 37 | { | |
| 38 | ++npids; | |
| 39 | if (piderr && piderr != EPERM) | |
| 40 | pidloser = piderr; | |
| 41 | } | |
| 42 | if (! piderr) | |
| 43 | { | |
| 44 | error_t prierr; | |
| 45 | ++ntasks; | |
| 3a2832a0 RM |
46 | #ifdef POLICY_TIMESHARE_BASE_COUNT |
| 47 | { | |
| 48 | /* XXX This assumes timeshare policy. */ | |
| 49 | struct policy_timeshare_base base | |
| 50 | = { NICE_TO_MACH_PRIORITY (prio) }; | |
| 51 | prierr = __task_policy (task, POLICY_TIMESHARE, | |
| 52 | (policy_base_t) &base, | |
| 53 | POLICY_TIMESHARE_BASE_COUNT, | |
| 54 | 0, 1); | |
| 55 | } | |
| 56 | #else | |
| 28f540f4 | 57 | prierr = __task_priority (task, NICE_TO_MACH_PRIORITY (prio), 1); |
| 3a2832a0 | 58 | #endif |
| 28f540f4 RM |
59 | __mach_port_deallocate (__mach_task_self (), task); |
| 60 | switch (prierr) | |
| 61 | { | |
| 62 | case KERN_FAILURE: | |
| 63 | ++nacces; | |
| 64 | break; | |
| 65 | case KERN_SUCCESS: | |
| 66 | ++nwin; | |
| 67 | break; | |
| 68 | case KERN_INVALID_ARGUMENT: /* Task died. */ | |
| 69 | --npids; | |
| 70 | --ntasks; | |
| 71 | break; | |
| 72 | default: | |
| 73 | priloser = prierr; | |
| 74 | } | |
| 75 | } | |
| 76 | return 0; | |
| 77 | } | |
| 78 | ||
| 79 | npids = ntasks = nwin = nperm = nacces = 0; | |
| 80 | pidloser = priloser = 0; | |
| 80b55d32 | 81 | err = _hurd_priority_which_map (which, who, setonepriority, 0); |
| 28f540f4 RM |
82 | |
| 83 | if (!err && npids == 0) | |
| 84 | /* No error, but no pids found. */ | |
| 85 | err = ESRCH; | |
| 86 | else if (nperm == npids) | |
| 87 | /* Got EPERM from proc_task2pid for every process. */ | |
| 88 | err = EPERM; | |
| 89 | else if (nacces == ntasks) | |
| 90 | /* Got KERN_FAILURE from task_priority for every task. */ | |
| 91 | err = EACCES; | |
| 92 | else if (nwin == 0) | |
| 93 | err = pidloser ?: priloser; | |
| 94 | ||
| 95 | return err ? __hurd_fail (err) : 0; | |
| 96 | } | |
| a14f26ef | 97 | libc_hidden_def (setpriority) |