diff options
Diffstat (limited to 'REORG.TODO/sysdeps/mach/hurd/setpriority.c')
-rw-r--r-- | REORG.TODO/sysdeps/mach/hurd/setpriority.c | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/mach/hurd/setpriority.c b/REORG.TODO/sysdeps/mach/hurd/setpriority.c new file mode 100644 index 0000000000..86992a1f6a --- /dev/null +++ b/REORG.TODO/sysdeps/mach/hurd/setpriority.c @@ -0,0 +1,98 @@ +/* Copyright (C) 1994-2017 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, see + <http://www.gnu.org/licenses/>. */ + +#include <hurd.h> +#include <hurd/resource.h> + +/* Set the priority of all processes specified by WHICH and WHO + to PRIO. Returns 0 on success, -1 on errors. */ +int +__setpriority (enum __priority_which which, id_t who, int prio) +{ + error_t err; + error_t pidloser, priloser; + unsigned int npids, ntasks, nwin, nperm, nacces; + + error_t setonepriority (pid_t pid, struct procinfo *pi) + { + task_t task; + error_t piderr = __USEPORT (PROC, __proc_pid2task (port, pid, &task)); + if (piderr == EPERM) + ++nperm; + if (piderr != ESRCH) + { + ++npids; + if (piderr && piderr != EPERM) + pidloser = piderr; + } + if (! piderr) + { + error_t prierr; + ++ntasks; +#ifdef POLICY_TIMESHARE_BASE_COUNT + { + /* XXX This assumes timeshare policy. */ + struct policy_timeshare_base base + = { NICE_TO_MACH_PRIORITY (prio) }; + prierr = __task_policy (task, POLICY_TIMESHARE, + (policy_base_t) &base, + POLICY_TIMESHARE_BASE_COUNT, + 0, 1); + } +#else + prierr = __task_priority (task, NICE_TO_MACH_PRIORITY (prio), 1); +#endif + __mach_port_deallocate (__mach_task_self (), task); + switch (prierr) + { + case KERN_FAILURE: + ++nacces; + break; + case KERN_SUCCESS: + ++nwin; + break; + case KERN_INVALID_ARGUMENT: /* Task died. */ + --npids; + --ntasks; + break; + default: + priloser = prierr; + } + } + return 0; + } + + npids = ntasks = nwin = nperm = nacces = 0; + pidloser = priloser = 0; + err = _hurd_priority_which_map (which, who, setonepriority, 0); + + if (!err && npids == 0) + /* No error, but no pids found. */ + err = ESRCH; + else if (nperm == npids) + /* Got EPERM from proc_task2pid for every process. */ + err = EPERM; + else if (nacces == ntasks) + /* Got KERN_FAILURE from task_priority for every task. */ + err = EACCES; + else if (nwin == 0) + err = pidloser ?: priloser; + + return err ? __hurd_fail (err) : 0; +} +libc_hidden_def (__setpriority) +weak_alias (__setpriority, setpriority) |