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28f540f4 | 1 | /* Support code for dealing with priorities in the Hurd. |
dff8da6b | 2 | Copyright (C) 1994-2024 Free Software Foundation, Inc. |
c84142e8 UD |
3 | This file is part of the GNU C Library. |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
41bdb6e2 AJ |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
c84142e8 UD |
9 | |
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
41bdb6e2 | 13 | Lesser General Public License for more details. |
c84142e8 | 14 | |
41bdb6e2 | 15 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 | 16 | License along with the GNU C Library; if not, see |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
28f540f4 | 18 | |
28f540f4 | 19 | #include <hurd.h> |
aefc5849 RM |
20 | #include <hurd/resource.h> |
21 | #include <sys/mman.h> | |
f7db9ce5 | 22 | #include <unistd.h> |
28f540f4 RM |
23 | |
24 | error_t | |
25 | _hurd_priority_which_map (enum __priority_which which, int who, | |
80b55d32 RM |
26 | error_t (*function) (pid_t, struct procinfo *), |
27 | int pi_flags) | |
28f540f4 RM |
28 | { |
29 | mach_msg_type_number_t npids = 64, i; | |
70aabf75 | 30 | pid_t pidbuf[npids], *pids = pidbuf; |
28f540f4 RM |
31 | error_t err; |
32 | struct procinfo *pip; | |
33 | int pibuf[sizeof *pip + 5 * sizeof (pip->threadinfos[0])], *pi = pibuf; | |
34 | mach_msg_type_number_t pisize = sizeof (pibuf) / sizeof (int); | |
35 | ||
36 | switch (which) | |
37 | { | |
aefc5849 RM |
38 | default: |
39 | return EINVAL; | |
40 | ||
28f540f4 | 41 | case PRIO_PROCESS: |
aefc5849 | 42 | err = (*function) (who ?: getpid (), 0); /* XXX special-case self? */ |
28f540f4 RM |
43 | break; |
44 | ||
45 | case PRIO_PGRP: | |
46 | err = __USEPORT (PROC, __proc_getpgrppids (port, who, &pids, &npids)); | |
aefc5849 RM |
47 | for (i = 0; !err && i < npids; ++i) |
48 | err = (*function) (pids[i], 0); | |
28f540f4 RM |
49 | break; |
50 | ||
51 | case PRIO_USER: | |
1a658b79 | 52 | if (who == 0) |
dba2bdbe | 53 | who = __geteuid (); |
28f540f4 | 54 | err = __USEPORT (PROC, __proc_getallpids (port, &pids, &npids)); |
aefc5849 | 55 | for (i = 0; !err && i < npids; ++i) |
28f540f4 RM |
56 | { |
57 | /* Get procinfo to check the owner. */ | |
58 | int *oldpi = pi; | |
59 | mach_msg_type_number_t oldpisize = pisize; | |
853f0eea | 60 | char *tw = 0; |
f4315054 | 61 | mach_msg_type_number_t twsz = 0; |
aefc5849 RM |
62 | err = __USEPORT (PROC, __proc_getprocinfo (port, pids[i], |
63 | &pi_flags, | |
64 | &pi, &pisize, | |
65 | &tw, &twsz)); | |
66 | if (!err) | |
67 | { | |
68 | if (twsz) /* Gratuitous. */ | |
69 | __munmap (tw, twsz); | |
70 | if (pi != oldpi && oldpi != pibuf) | |
71 | /* Old buffer from last call was not reused; free it. */ | |
72 | __munmap (oldpi, oldpisize * sizeof pi[0]); | |
28f540f4 | 73 | |
aefc5849 RM |
74 | pip = (struct procinfo *) pi; |
75 | if (pip->owner == (uid_t) who) | |
76 | err = (*function) (pids[i], pip); | |
77 | } | |
28f540f4 | 78 | } |
aefc5849 | 79 | break; |
28f540f4 RM |
80 | } |
81 | ||
82 | if (pids != pidbuf) | |
aefc5849 | 83 | __munmap (pids, npids * sizeof pids[0]); |
28f540f4 | 84 | if (pi != pibuf) |
aefc5849 | 85 | __munmap (pi, pisize * sizeof pi[0]); |
28f540f4 RM |
86 | |
87 | return err; | |
88 | } |