initial import

1 files changed, 451 insertions, 0 deletions

diff --git a/hurd/hurdmsg.c b/hurd/hurdmsg.c
new file mode 100644
index 0000000000..57b6b8dd67
--- /dev/null
+++ b/hurd/hurdmsg.c
@@ -0,0 +1,451 @@
+/* Copyright (C) 1992, 1994, 1995 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 Library General Public License as
+published by the Free Software Foundation; either version 2 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
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#include <hurd.h>
+#include <hurd/msg_server.h>
+#include <hurd/fd.h>
+#include <unistd.h>
+#include <limits.h>
+#include <string.h>
+
+
+#define AUTHCHECK \
+  if (auth != mach_task_self () && ! __USEPORT (AUTH, port == auth)) \
+    return EPERM
+
+
+/* Snarfing and frobbing the init ports.  */
+
+kern_return_t
+_S_msg_get_init_port (mach_port_t msgport, mach_port_t auth, int which,
+		  mach_port_t *result, mach_msg_type_name_t *result_type)
+{
+  AUTHCHECK;
+  *result_type = MACH_MSG_TYPE_MOVE_SEND;
+  /* This function adds a new user reference for the *RESULT it gives back.
+     Our reply message uses a move-send right that consumes this reference.  */
+  return _hurd_ports_get (which, result);
+}
+
+kern_return_t
+_S_msg_set_init_port (mach_port_t msgport, mach_port_t auth,
+		  int which, mach_port_t port)
+{
+  error_t err;
+
+  AUTHCHECK;
+
+  err = _hurd_ports_set (which, port);
+  if (err == 0)
+    __mach_port_deallocate (__mach_task_self (), port);
+
+  return 0;
+}
+
+kern_return_t
+_S_msg_get_init_ports (mach_port_t msgport, mach_port_t auth,
+		   mach_port_t **ports,
+		   mach_msg_type_name_t *ports_type,
+		   mach_msg_type_number_t *nports)
+{
+  mach_msg_type_number_t i;
+  error_t err;
+
+  AUTHCHECK;
+
+  if (err = __vm_allocate (__mach_task_self (), (vm_address_t *) ports,
+			   _hurd_nports * sizeof (mach_port_t), 1))
+    return err;
+  *nports = _hurd_nports;
+
+  for (i = 0; i < _hurd_nports; ++i)
+    /* This function adds a new user ref for the *RESULT it gives back.
+       Our reply message uses move-send rights that consumes this ref.  */
+    if (err = _hurd_ports_get (i, &(*ports)[i]))
+      {
+	/* Died part way through.  Deallocate the ports already fetched.  */
+	while (i-- > 0)
+	  __mach_port_deallocate (__mach_task_self (), (*ports)[i]);
+	__vm_deallocate (__mach_task_self (),
+			 (vm_address_t) *ports,
+			 *nports * sizeof (mach_port_t));
+	return err;
+      }
+
+  *ports_type = MACH_MSG_TYPE_MOVE_SEND;
+  return 0;
+}
+
+kern_return_t
+_S_msg_set_init_ports (mach_port_t msgport, mach_port_t auth,
+		   mach_port_t *ports, mach_msg_type_number_t nports)
+{
+  mach_msg_type_number_t i;
+  error_t err;
+
+  AUTHCHECK;
+
+  for (i = 0; i < _hurd_nports; ++i)
+    {
+      if (err = _hurd_ports_set (i, ports[i]))
+	return err;
+      else
+	__mach_port_deallocate (__mach_task_self (), ports[i]);
+    }
+
+  return 0;
+}
+
+/* Snarfing and frobbing the init ints.  */
+
+static kern_return_t
+get_int (int which, int *value)
+{
+  switch (which)
+    {
+    case INIT_UMASK:
+      *value = _hurd_umask;
+      return 0;
+    case INIT_SIGMASK:
+      {
+	struct hurd_sigstate *ss = _hurd_thread_sigstate (_hurd_sigthread);
+	__spin_lock (&ss->lock);
+	*value = ss->blocked;
+	__spin_unlock (&ss->lock);
+	return 0;
+      }
+    case INIT_SIGPENDING:
+      {
+	struct hurd_sigstate *ss = _hurd_thread_sigstate (_hurd_sigthread);
+	__spin_lock (&ss->lock);
+	*value = ss->pending;
+	__spin_unlock (&ss->lock);
+	return 0;
+      }
+    case INIT_SIGIGN:
+      {
+	struct hurd_sigstate *ss = _hurd_thread_sigstate (_hurd_sigthread);
+	sigset_t ign;
+	int sig;
+	__spin_lock (&ss->lock);
+	__sigemptyset (&ign);
+	for (sig = 1; sig < NSIG; ++sig)
+	  if (ss->actions[sig].sa_handler == SIG_IGN)
+	    __sigaddset (&ign, sig);
+	__spin_unlock (&ss->lock);
+	*value = ign;
+	return 0;
+      }
+    default:
+      return EINVAL;
+    }
+}
+
+kern_return_t
+_S_msg_get_init_int (mach_port_t msgport, mach_port_t auth,
+		 int which, int *value)
+{
+  AUTHCHECK;
+
+  return get_int (which, value);
+}
+
+kern_return_t
+_S_msg_get_init_ints (mach_port_t msgport, mach_port_t auth,
+		  int **values, mach_msg_type_number_t *nvalues)
+{
+  error_t err;
+  mach_msg_type_number_t i;
+
+  AUTHCHECK;
+
+  if (err = __vm_allocate (__mach_task_self (), (vm_address_t *) values,
+			   INIT_INT_MAX * sizeof (int), 1))
+    return err;
+  *nvalues = INIT_INT_MAX;
+
+  for (i = 0; i < INIT_INT_MAX; ++i)
+    switch (err = get_int (i, &(*values)[i]))
+      {
+      case 0:			/* Success.  */
+	break;
+      case EINVAL:		/* Unknown index.  */
+	(*values)[i] = 0;
+	break;
+      default:			/* Lossage.  */
+	__vm_deallocate (__mach_task_self (),
+			 (vm_address_t) *values, INIT_INT_MAX * sizeof (int));
+	return err;
+      }
+
+  return 0;
+}
+
+
+static kern_return_t
+set_int (int which, int value)
+{
+  switch (which)
+    {
+    case INIT_UMASK:
+      _hurd_umask = value;
+      return 0;
+
+      /* These are pretty odd things to do.  But you asked for it.  */
+    case INIT_SIGMASK:
+      {
+	struct hurd_sigstate *ss = _hurd_thread_sigstate (_hurd_sigthread);
+	__spin_lock (&ss->lock);
+	ss->blocked = value;
+	__spin_unlock (&ss->lock);
+	return 0;
+      }
+    case INIT_SIGPENDING:
+      {
+	struct hurd_sigstate *ss = _hurd_thread_sigstate (_hurd_sigthread);
+	__spin_lock (&ss->lock);
+	ss->pending = value;
+	__spin_unlock (&ss->lock);
+	return 0;
+      }
+    case INIT_SIGIGN:
+      {
+	struct hurd_sigstate *ss = _hurd_thread_sigstate (_hurd_sigthread);
+	int sig;
+	const sigset_t ign = value;
+	__spin_lock (&ss->lock);
+	for (sig = 1; sig < NSIG; ++sig)
+	  {
+	    if (__sigismember (&ign, sig))
+	      ss->actions[sig].sa_handler = SIG_IGN;
+	    else if (ss->actions[sig].sa_handler == SIG_IGN)
+	      ss->actions[sig].sa_handler = SIG_DFL;
+	  }
+	__spin_unlock (&ss->lock);
+	return 0;
+      }
+    default:
+      return EINVAL;
+    }
+}
+
+kern_return_t
+_S_msg_set_init_int (mach_port_t msgport, mach_port_t auth,
+		 int which, int value)
+{
+  AUTHCHECK;
+
+  return set_int (which, value);
+}
+
+kern_return_t
+_S_msg_set_init_ints (mach_port_t msgport, mach_port_t auth,
+		  int *values, mach_msg_type_number_t nvalues)
+{
+  error_t err;
+  mach_msg_type_number_t i;
+
+  AUTHCHECK;
+
+  for (i = 0; i < INIT_INT_MAX; ++i)
+    switch (err = set_int (i, values[i]))
+      {
+      case 0:			/* Success.  */
+	break;
+      case EINVAL:		/* Unknown index.  */
+	break;
+      default:			/* Lossage.  */
+	return err;
+      }
+
+  return 0;
+}
+
+
+kern_return_t
+_S_msg_get_fd (mach_port_t msgport, mach_port_t auth,
+	   int which, mach_port_t *result, mach_msg_type_name_t *result_type)
+{
+  AUTHCHECK;
+
+  /* This creates a new user reference for the send right.
+     Our reply message will move that reference to the caller.  */
+  *result = __getdport (which);
+  if (*result == MACH_PORT_NULL)
+    return errno;
+  *result_type = MACH_MSG_TYPE_MOVE_SEND;
+
+  return 0;
+}
+
+kern_return_t
+_S_msg_set_fd (mach_port_t msgport, mach_port_t auth,
+	   int which, mach_port_t port)
+{
+  AUTHCHECK;
+
+  /* We consume the reference if successful.  */
+  return HURD_FD_USE (which, (_hurd_port2fd (descriptor, port, 0), 0));
+}
+
+/* Snarfing and frobbing environment variables.  */
+
+kern_return_t
+_S_msg_get_env_variable (mach_port_t msgport,
+		     char *variable,
+		     char **data, mach_msg_type_number_t *datalen)
+{
+  const char *value = getenv (variable);
+
+  if (value == NULL)
+    return ENOENT;
+
+  /* XXX this pointer might become invalid */
+  *data = value;
+  *datalen = strlen (value);
+  return 0;
+}
+
+
+kern_return_t
+_S_msg_set_env_variable (mach_port_t msgport, mach_port_t auth,
+		     char *variable,
+		     char *value,
+		     int replace)
+{
+  AUTHCHECK;
+
+  if (setenv (variable, value, replace)) /* XXX name space */
+    return errno;
+  return 0;
+}
+
+kern_return_t
+_S_msg_get_environment (mach_port_t msgport,
+		    char **data, mach_msg_type_number_t *datalen)
+{
+  /* Pack the environment into an array with nulls separating elements.  */
+  if (__environ != NULL)
+    {
+      char *ap, **p;
+      size_t envlen = 0;
+
+      for (p = __environ; *p != NULL; ++p)
+	envlen += strlen (*p) + 1;
+
+      if (envlen > *datalen)
+	{
+	  if (__vm_allocate (__mach_task_self (),
+			     (vm_address_t *) data, envlen, 1))
+	    return ENOMEM;
+	}
+
+      ap = *data;
+      for (p = __environ; *p != NULL; ++p)
+	ap = __memccpy (ap, *p, '\0', ULONG_MAX);
+
+      *datalen = envlen;
+    }
+  else
+    *datalen = 0;
+
+  return 0;
+}
+
+kern_return_t
+_S_msg_set_environment (mach_port_t msgport, mach_port_t auth,
+		    char *data, mach_msg_type_number_t datalen)
+{
+  int _hurd_split_args (char *, mach_msg_type_number_t, char **);
+  int envc;
+  char **envp;
+
+  AUTHCHECK;
+
+  envc = _hurd_split_args (data, datalen, NULL);
+  envp = malloc ((envc + 1) * sizeof (char *));
+  if (envp == NULL)
+    return errno;
+  _hurd_split_args (data, datalen, envp);
+  __environ = envp;		/* XXX cooperate with loadenv et al */
+  return 0;
+}
+
+/* Get and frob the exec flags.  */
+
+kern_return_t
+_S_msg_get_exec_flags (mach_port_t process, mach_port_t auth,
+		       int *flags)
+{
+  AUTHCHECK;
+
+  *flags = _hurd_exec_flags;
+  return 0;
+}
+
+kern_return_t
+_S_msg_set_all_exec_flags (mach_port_t process, mach_port_t auth,
+			   int flags)
+{
+  AUTHCHECK;
+
+  _hurd_exec_flags = flags;
+  return 0;
+}
+
+kern_return_t
+_S_msg_set_some_exec_flags (mach_port_t process, mach_port_t auth,
+			    int flags)
+{
+  AUTHCHECK;
+
+  _hurd_exec_flags |= flags;
+  return 0;
+}
+
+kern_return_t
+_S_msg_clear_some_exec_flags (mach_port_t process, mach_port_t auth,
+			      int flags)
+{
+  AUTHCHECK;
+
+  _hurd_exec_flags &= ~flags;
+  return 0;
+}
+
+
+/* XXX */
+
+kern_return_t
+_S_msg_get_dtable (mach_port_t process,
+	       mach_port_t refport,
+	       portarray_t *dtable,
+	       mach_msg_type_name_t *dtablePoly,
+	       mach_msg_type_number_t *dtableCnt)
+{ return EOPNOTSUPP; }
+
+kern_return_t
+_S_msg_set_dtable (mach_port_t process,
+	       mach_port_t refport,
+	       portarray_t dtable,
+	       mach_msg_type_number_t dtableCnt)
+{ return EOPNOTSUPP; }
+
+kern_return_t
+_S_msg_startup_dosync (mach_port_t process)
+{ return EOPNOTSUPP; }