| 1 | /* Copyright (C) 1991-2022 Free Software Foundation, Inc. |
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| 2 | This file is part of the GNU C Library. |
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| 3 | |
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| 4 | The GNU C Library is free software; you can redistribute it and/or |
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| 5 | modify it under the terms of the GNU Lesser General Public |
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| 6 | License as published by the Free Software Foundation; either |
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| 7 | version 2.1 of the License, or (at your option) any later version. |
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| 8 | |
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| 9 | The GNU C Library is distributed in the hope that it will be useful, |
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| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 12 | Lesser General Public License for more details. |
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| 13 | |
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| 14 | You should have received a copy of the GNU Lesser General Public |
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| 15 | License along with the GNU C Library; if not, see |
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| 16 | <https://www.gnu.org/licenses/>. */ |
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| 17 | |
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| 18 | #include <hurd.h> |
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| 19 | #include <lowlevellock.h> |
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| 20 | #include "set-hooks.h" |
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| 21 | |
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| 22 | pid_t _hurd_pid, _hurd_ppid, _hurd_pgrp; |
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| 23 | int _hurd_orphaned; |
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| 24 | |
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| 25 | static void attribute_used_retain |
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| 26 | init_pids (void) |
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| 27 | { |
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| 28 | __USEPORT (PROC, |
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| 29 | ({ |
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| 30 | __proc_getpids (port, &_hurd_pid, &_hurd_ppid, &_hurd_orphaned); |
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| 31 | __proc_getpgrp (port, _hurd_pid, &_hurd_pgrp); |
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| 32 | })); |
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| 33 | } |
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| 34 | |
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| 35 | SET_RELHOOK (_hurd_proc_subinit, init_pids); |
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| 36 | |
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| 37 | #include <hurd/msg_server.h> |
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| 38 | #include "set-hooks.h" |
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| 39 | |
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| 40 | DEFINE_HOOK (_hurd_pgrp_changed_hook, (pid_t)); |
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| 41 | |
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| 42 | /* These let user threads synchronize with an operation which changes ids. */ |
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| 43 | unsigned int _hurd_pids_changed_stamp; |
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| 44 | |
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| 45 | kern_return_t |
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| 46 | _S_msg_proc_newids (mach_port_t me, |
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| 47 | task_t task, |
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| 48 | pid_t ppid, pid_t pgrp, int orphaned) |
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| 49 | { |
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| 50 | int pgrp_changed; |
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| 51 | |
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| 52 | if (task != __mach_task_self ()) |
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| 53 | return EPERM; |
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| 54 | |
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| 55 | __mach_port_deallocate (__mach_task_self (), task); |
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| 56 | |
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| 57 | pgrp_changed = pgrp != _hurd_pgrp; |
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| 58 | _hurd_ppid = ppid; |
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| 59 | _hurd_pgrp = pgrp; |
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| 60 | _hurd_orphaned = orphaned; |
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| 61 | |
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| 62 | if (pgrp_changed) |
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| 63 | /* Run things that want notification of a pgrp change. */ |
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| 64 | RUN_HOOK (_hurd_pgrp_changed_hook, (pgrp)); |
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| 65 | |
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| 66 | /* Notify any waiting user threads that the id change as been completed. */ |
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| 67 | ++_hurd_pids_changed_stamp; |
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| 68 | lll_wake (_hurd_pids_changed_stamp, GSYNC_BROADCAST); |
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| 69 | |
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| 70 | return 0; |
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| 71 | } |
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| 72 | |
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