projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 28f540f4 RM |
1 | /* Copyright (C) 1994 Free Software Foundation, Inc. |
| 2 | This file is part of the GNU C Library. | |
| 3 | ||
| 4 | The GNU C Library is free software; you can redistribute it and/or | |
| 5 | modify it under the terms of the GNU Library General Public License as | |
| 6 | published by the Free Software Foundation; either version 2 of the | |
| 7 | License, or (at your option) any later version. | |
| 8 | ||
| 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 | |
| 12 | Library General Public License for more details. | |
| 13 | ||
| 14 | You should have received a copy of the GNU Library General Public | |
| 15 | License along with the GNU C Library; see the file COPYING.LIB. If | |
| 16 | not, write to the Free Software Foundation, Inc., 675 Mass Ave, | |
| 17 | Cambridge, MA 02139, USA. */ | |
| 18 | ||
| 19 | #include <hurd.h> | |
| 20 | #include <hurd/resource.h> | |
| 21 | ||
| 22 | /* Set the priority of all processes specified by WHICH and WHO | |
| 23 | to PRIO. Returns 0 on success, -1 on errors. */ | |
| 24 | int | |
| 25 | setpriority (enum __priority_which which, int who, int prio) | |
| 26 | { | |
| 27 | error_t err; | |
| 28 | error_t pidloser, priloser; | |
| 29 | unsigned int npids, ntasks, nwin, nperm, nacces; | |
| 30 | ||
| 31 | error_t setonepriority (pid_t pid, struct procinfo *pi) | |
| 32 | { | |
| 33 | task_t task; | |
| 34 | error_t piderr = __USEPORT (PROC, __proc_pid2task (port, pid, &task)); | |
| 35 | if (piderr == EPERM) | |
| 36 | ++nperm; | |
| 37 | if (piderr != ESRCH) | |
| 38 | { | |
| 39 | ++npids; | |
| 40 | if (piderr && piderr != EPERM) | |
| 41 | pidloser = piderr; | |
| 42 | } | |
| 43 | if (! piderr) | |
| 44 | { | |
| 45 | error_t prierr; | |
| 46 | ++ntasks; | |
| 47 | prierr = __task_priority (task, NICE_TO_MACH_PRIORITY (prio), 1); | |
| 48 | __mach_port_deallocate (__mach_task_self (), task); | |
| 49 | switch (prierr) | |
| 50 | { | |
| 51 | case KERN_FAILURE: | |
| 52 | ++nacces; | |
| 53 | break; | |
| 54 | case KERN_SUCCESS: | |
| 55 | ++nwin; | |
| 56 | break; | |
| 57 | case KERN_INVALID_ARGUMENT: /* Task died. */ | |
| 58 | --npids; | |
| 59 | --ntasks; | |
| 60 | break; | |
| 61 | default: | |
| 62 | priloser = prierr; | |
| 63 | } | |
| 64 | } | |
| 65 | return 0; | |
| 66 | } | |
| 67 | ||
| 68 | npids = ntasks = nwin = nperm = nacces = 0; | |
| 69 | pidloser = priloser = 0; | |
| 70 | err = _hurd_priority_which_map (which, who, setonepriority); | |
| 71 | ||
| 72 | if (!err && npids == 0) | |
| 73 | /* No error, but no pids found. */ | |
| 74 | err = ESRCH; | |
| 75 | else if (nperm == npids) | |
| 76 | /* Got EPERM from proc_task2pid for every process. */ | |
| 77 | err = EPERM; | |
| 78 | else if (nacces == ntasks) | |
| 79 | /* Got KERN_FAILURE from task_priority for every task. */ | |
| 80 | err = EACCES; | |
| 81 | else if (nwin == 0) | |
| 82 | err = pidloser ?: priloser; | |
| 83 | ||
| 84 | return err ? __hurd_fail (err) : 0; | |
| 85 | } |