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https://sourceware.org/git/glibc.git
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initial import
This commit is contained in:
Roland McGrath
451
hurd/hurdmsg.c
Normal file
451
hurd/hurdmsg.c
Normal file
@@ -0,0 +1,451 @@
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/* Copyright (C) 1992, 1994, 1995 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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Cambridge, MA 02139, USA. */
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#include <hurd.h>
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#include <hurd/msg_server.h>
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#include <hurd/fd.h>
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#include <unistd.h>
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#include <limits.h>
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#include <string.h>
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#define AUTHCHECK \
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if (auth != mach_task_self () && ! __USEPORT (AUTH, port == auth)) \
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return EPERM
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/* Snarfing and frobbing the init ports. */
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kern_return_t
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_S_msg_get_init_port (mach_port_t msgport, mach_port_t auth, int which,
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mach_port_t *result, mach_msg_type_name_t *result_type)
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{
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AUTHCHECK;
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*result_type = MACH_MSG_TYPE_MOVE_SEND;
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/* This function adds a new user reference for the *RESULT it gives back.
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Our reply message uses a move-send right that consumes this reference. */
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return _hurd_ports_get (which, result);
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}
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kern_return_t
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_S_msg_set_init_port (mach_port_t msgport, mach_port_t auth,
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int which, mach_port_t port)
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{
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error_t err;
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AUTHCHECK;
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err = _hurd_ports_set (which, port);
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if (err == 0)
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__mach_port_deallocate (__mach_task_self (), port);
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return 0;
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}
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kern_return_t
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_S_msg_get_init_ports (mach_port_t msgport, mach_port_t auth,
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mach_port_t **ports,
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mach_msg_type_name_t *ports_type,
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mach_msg_type_number_t *nports)
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{
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mach_msg_type_number_t i;
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error_t err;
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AUTHCHECK;
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if (err = __vm_allocate (__mach_task_self (), (vm_address_t *) ports,
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_hurd_nports * sizeof (mach_port_t), 1))
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return err;
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*nports = _hurd_nports;
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for (i = 0; i < _hurd_nports; ++i)
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/* This function adds a new user ref for the *RESULT it gives back.
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Our reply message uses move-send rights that consumes this ref. */
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if (err = _hurd_ports_get (i, &(*ports)[i]))
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{
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/* Died part way through. Deallocate the ports already fetched. */
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while (i-- > 0)
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__mach_port_deallocate (__mach_task_self (), (*ports)[i]);
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__vm_deallocate (__mach_task_self (),
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(vm_address_t) *ports,
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*nports * sizeof (mach_port_t));
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return err;
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}
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*ports_type = MACH_MSG_TYPE_MOVE_SEND;
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return 0;
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}
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kern_return_t
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_S_msg_set_init_ports (mach_port_t msgport, mach_port_t auth,
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mach_port_t *ports, mach_msg_type_number_t nports)
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{
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mach_msg_type_number_t i;
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error_t err;
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AUTHCHECK;
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for (i = 0; i < _hurd_nports; ++i)
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{
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if (err = _hurd_ports_set (i, ports[i]))
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return err;
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else
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__mach_port_deallocate (__mach_task_self (), ports[i]);
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}
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return 0;
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}
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/* Snarfing and frobbing the init ints. */
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static kern_return_t
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get_int (int which, int *value)
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{
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switch (which)
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{
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case INIT_UMASK:
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*value = _hurd_umask;
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return 0;
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case INIT_SIGMASK:
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{
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struct hurd_sigstate *ss = _hurd_thread_sigstate (_hurd_sigthread);
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__spin_lock (&ss->lock);
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*value = ss->blocked;
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__spin_unlock (&ss->lock);
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return 0;
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}
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case INIT_SIGPENDING:
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{
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struct hurd_sigstate *ss = _hurd_thread_sigstate (_hurd_sigthread);
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__spin_lock (&ss->lock);
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*value = ss->pending;
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__spin_unlock (&ss->lock);
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return 0;
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}
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case INIT_SIGIGN:
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{
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struct hurd_sigstate *ss = _hurd_thread_sigstate (_hurd_sigthread);
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sigset_t ign;
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int sig;
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__spin_lock (&ss->lock);
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__sigemptyset (&ign);
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for (sig = 1; sig < NSIG; ++sig)
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if (ss->actions[sig].sa_handler == SIG_IGN)
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__sigaddset (&ign, sig);
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__spin_unlock (&ss->lock);
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*value = ign;
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return 0;
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}
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default:
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return EINVAL;
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}
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}
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kern_return_t
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_S_msg_get_init_int (mach_port_t msgport, mach_port_t auth,
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int which, int *value)
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{
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AUTHCHECK;
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return get_int (which, value);
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}
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kern_return_t
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_S_msg_get_init_ints (mach_port_t msgport, mach_port_t auth,
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int **values, mach_msg_type_number_t *nvalues)
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{
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error_t err;
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mach_msg_type_number_t i;
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AUTHCHECK;
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if (err = __vm_allocate (__mach_task_self (), (vm_address_t *) values,
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INIT_INT_MAX * sizeof (int), 1))
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return err;
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*nvalues = INIT_INT_MAX;
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for (i = 0; i < INIT_INT_MAX; ++i)
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switch (err = get_int (i, &(*values)[i]))
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{
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case 0: /* Success. */
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break;
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case EINVAL: /* Unknown index. */
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(*values)[i] = 0;
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break;
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default: /* Lossage. */
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__vm_deallocate (__mach_task_self (),
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(vm_address_t) *values, INIT_INT_MAX * sizeof (int));
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return err;
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}
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return 0;
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}
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static kern_return_t
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set_int (int which, int value)
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{
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switch (which)
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{
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case INIT_UMASK:
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_hurd_umask = value;
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return 0;
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/* These are pretty odd things to do. But you asked for it. */
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case INIT_SIGMASK:
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{
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struct hurd_sigstate *ss = _hurd_thread_sigstate (_hurd_sigthread);
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__spin_lock (&ss->lock);
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ss->blocked = value;
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__spin_unlock (&ss->lock);
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return 0;
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}
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case INIT_SIGPENDING:
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{
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struct hurd_sigstate *ss = _hurd_thread_sigstate (_hurd_sigthread);
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__spin_lock (&ss->lock);
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ss->pending = value;
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__spin_unlock (&ss->lock);
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return 0;
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}
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case INIT_SIGIGN:
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{
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struct hurd_sigstate *ss = _hurd_thread_sigstate (_hurd_sigthread);
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int sig;
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const sigset_t ign = value;
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__spin_lock (&ss->lock);
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for (sig = 1; sig < NSIG; ++sig)
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{
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if (__sigismember (&ign, sig))
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ss->actions[sig].sa_handler = SIG_IGN;
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else if (ss->actions[sig].sa_handler == SIG_IGN)
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ss->actions[sig].sa_handler = SIG_DFL;
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}
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__spin_unlock (&ss->lock);
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return 0;
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}
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default:
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return EINVAL;
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}
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}
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kern_return_t
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_S_msg_set_init_int (mach_port_t msgport, mach_port_t auth,
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int which, int value)
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{
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AUTHCHECK;
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return set_int (which, value);
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}
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kern_return_t
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_S_msg_set_init_ints (mach_port_t msgport, mach_port_t auth,
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int *values, mach_msg_type_number_t nvalues)
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{
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error_t err;
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mach_msg_type_number_t i;
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AUTHCHECK;
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for (i = 0; i < INIT_INT_MAX; ++i)
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switch (err = set_int (i, values[i]))
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{
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case 0: /* Success. */
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break;
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case EINVAL: /* Unknown index. */
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break;
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default: /* Lossage. */
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return err;
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}
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return 0;
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}
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kern_return_t
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_S_msg_get_fd (mach_port_t msgport, mach_port_t auth,
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int which, mach_port_t *result, mach_msg_type_name_t *result_type)
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{
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AUTHCHECK;
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/* This creates a new user reference for the send right.
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Our reply message will move that reference to the caller. */
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*result = __getdport (which);
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if (*result == MACH_PORT_NULL)
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return errno;
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*result_type = MACH_MSG_TYPE_MOVE_SEND;
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return 0;
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}
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kern_return_t
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_S_msg_set_fd (mach_port_t msgport, mach_port_t auth,
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int which, mach_port_t port)
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{
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AUTHCHECK;
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/* We consume the reference if successful. */
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return HURD_FD_USE (which, (_hurd_port2fd (descriptor, port, 0), 0));
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}
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/* Snarfing and frobbing environment variables. */
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kern_return_t
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_S_msg_get_env_variable (mach_port_t msgport,
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char *variable,
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char **data, mach_msg_type_number_t *datalen)
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{
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const char *value = getenv (variable);
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if (value == NULL)
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return ENOENT;
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/* XXX this pointer might become invalid */
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*data = value;
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*datalen = strlen (value);
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return 0;
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}
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kern_return_t
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_S_msg_set_env_variable (mach_port_t msgport, mach_port_t auth,
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char *variable,
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char *value,
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int replace)
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{
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AUTHCHECK;
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if (setenv (variable, value, replace)) /* XXX name space */
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return errno;
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return 0;
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}
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kern_return_t
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_S_msg_get_environment (mach_port_t msgport,
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char **data, mach_msg_type_number_t *datalen)
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{
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/* Pack the environment into an array with nulls separating elements. */
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if (__environ != NULL)
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{
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char *ap, **p;
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size_t envlen = 0;
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for (p = __environ; *p != NULL; ++p)
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envlen += strlen (*p) + 1;
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if (envlen > *datalen)
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{
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if (__vm_allocate (__mach_task_self (),
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(vm_address_t *) data, envlen, 1))
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return ENOMEM;
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}
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ap = *data;
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for (p = __environ; *p != NULL; ++p)
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ap = __memccpy (ap, *p, '\0', ULONG_MAX);
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*datalen = envlen;
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}
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else
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*datalen = 0;
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return 0;
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}
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kern_return_t
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_S_msg_set_environment (mach_port_t msgport, mach_port_t auth,
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char *data, mach_msg_type_number_t datalen)
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{
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int _hurd_split_args (char *, mach_msg_type_number_t, char **);
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int envc;
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char **envp;
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AUTHCHECK;
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envc = _hurd_split_args (data, datalen, NULL);
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envp = malloc ((envc + 1) * sizeof (char *));
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if (envp == NULL)
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return errno;
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_hurd_split_args (data, datalen, envp);
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__environ = envp; /* XXX cooperate with loadenv et al */
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return 0;
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}
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/* Get and frob the exec flags. */
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kern_return_t
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_S_msg_get_exec_flags (mach_port_t process, mach_port_t auth,
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int *flags)
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{
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AUTHCHECK;
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*flags = _hurd_exec_flags;
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return 0;
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}
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kern_return_t
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_S_msg_set_all_exec_flags (mach_port_t process, mach_port_t auth,
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int flags)
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{
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AUTHCHECK;
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_hurd_exec_flags = flags;
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return 0;
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}
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kern_return_t
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_S_msg_set_some_exec_flags (mach_port_t process, mach_port_t auth,
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int flags)
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{
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AUTHCHECK;
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_hurd_exec_flags |= flags;
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return 0;
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}
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kern_return_t
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_S_msg_clear_some_exec_flags (mach_port_t process, mach_port_t auth,
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int flags)
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{
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AUTHCHECK;
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_hurd_exec_flags &= ~flags;
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return 0;
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}
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/* XXX */
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kern_return_t
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_S_msg_get_dtable (mach_port_t process,
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mach_port_t refport,
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portarray_t *dtable,
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mach_msg_type_name_t *dtablePoly,
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mach_msg_type_number_t *dtableCnt)
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{ return EOPNOTSUPP; }
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kern_return_t
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_S_msg_set_dtable (mach_port_t process,
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mach_port_t refport,
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portarray_t dtable,
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mach_msg_type_number_t dtableCnt)
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{ return EOPNOTSUPP; }
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kern_return_t
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_S_msg_startup_dosync (mach_port_t process)
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{ return EOPNOTSUPP; }
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Block a user