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authorRoland McGrath <roland@gnu.org>1995-02-18 01:27:10 +0000
committerRoland McGrath <roland@gnu.org>1995-02-18 01:27:10 +0000
commit28f540f45bbacd939bfd07f213bcad2bf730b1bf (patch)
tree15f07c4c43d635959c6afee96bde71fb1b3614ee /hurd/hurdinit.c
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initial import
Diffstat (limited to 'hurd/hurdinit.c')
-rw-r--r--hurd/hurdinit.c193
1 files changed, 193 insertions, 0 deletions
diff --git a/hurd/hurdinit.c b/hurd/hurdinit.c
new file mode 100644
index 0000000..4469a17
--- /dev/null
+++ b/hurd/hurdinit.c
@@ -0,0 +1,193 @@
+/* Copyright (C) 1992, 1993, 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 <sys/stat.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <hurd.h>
+#include <hurd/port.h>
+#include "set-hooks.h"
+#include "hurdmalloc.h" /* XXX */
+
+
+int _hurd_exec_flags;
+struct hurd_port *_hurd_ports;
+unsigned int _hurd_nports;
+mode_t _hurd_umask;
+
+void _hurd_proc_init (char **argv);
+
+DEFINE_HOOK (_hurd_subinit, (void));
+
+/* Initialize the library data structures from the
+ ints and ports passed to us by the exec server.
+
+ PORTARRAY and INTARRAY are vm_deallocate'd. */
+
+void
+_hurd_init (int flags, char **argv,
+ mach_port_t *portarray, size_t portarraysize,
+ int *intarray, size_t intarraysize)
+{
+ int i;
+
+ _hurd_exec_flags = flags;
+
+ _hurd_ports = malloc (portarraysize * sizeof (*_hurd_ports));
+ if (_hurd_ports == NULL)
+ __libc_fatal ("Can't allocate _hurd_ports\n");
+ _hurd_nports = portarraysize;
+
+ /* See what ports we were passed. */
+ for (i = 0; i < portarraysize; ++i)
+ _hurd_port_init (&_hurd_ports[i], portarray[i]);
+
+ /* When the user asks for the bootstrap port,
+ he will get the one the exec server passed us. */
+ __task_set_special_port (__mach_task_self (), TASK_BOOTSTRAP_PORT,
+ portarray[INIT_PORT_BOOTSTRAP]);
+
+ /* Tell the proc server we exist, if it does. */
+ if (portarray[INIT_PORT_PROC] != MACH_PORT_NULL)
+ _hurd_proc_init (argv);
+
+ if (intarraysize > INIT_UMASK)
+ _hurd_umask = intarray[INIT_UMASK] & 0777;
+ else
+ _hurd_umask = CMASK;
+
+ /* All done with init ints and ports. */
+ __vm_deallocate (__mach_task_self (),
+ (vm_address_t) intarray,
+ intarraysize * sizeof (int));
+ __vm_deallocate (__mach_task_self (),
+ (vm_address_t) portarray,
+ portarraysize * sizeof (mach_port_t));
+
+ if (flags & EXEC_SECURE)
+ /* XXX if secure exec, elide environment variables
+ which the library uses and could be security holes.
+ CORESERVER, COREFILE
+ */ ;
+
+ /* Call other things which want to do some initialization. These are not
+ on the __libc_subinit hook because things there like to be able to
+ assume the availability of the POSIX.1 services we provide. */
+ RUN_HOOK (_hurd_subinit, ());
+}
+
+#include <hurd/signal.h>
+
+/* The user can do "int _hide_arguments = 1;" to make
+ sure the arguments are never visible with `ps'. */
+int _hide_arguments, _hide_environment;
+
+/* Hook for things which should be initialized as soon as the proc
+ server is available. */
+DEFINE_HOOK (_hurd_proc_subinit, (void));
+
+/* Do startup handshaking with the proc server just installed in _hurd_ports.
+ Call _hurdsig_init to set up signal processing. */
+
+void
+_hurd_proc_init (char **argv)
+{
+ mach_port_t oldmsg;
+ struct hurd_userlink ulink;
+ process_t procserver;
+
+ /* Initialize the signal code; Mach exceptions will become signals. */
+ _hurdsig_init ();
+
+ /* The signal thread is now prepared to receive messages.
+ It is safe to give the port to the proc server. */
+
+ procserver = _hurd_port_get (&_hurd_ports[INIT_PORT_PROC], &ulink);
+
+ /* Give the proc server our message port. */
+ __proc_setmsgport (procserver, _hurd_msgport, &oldmsg);
+ if (oldmsg != MACH_PORT_NULL)
+ /* Deallocate the old msg port we replaced. */
+ __mach_port_deallocate (__mach_task_self (), oldmsg);
+
+ /* Tell the proc server where our args and environment are. */
+ __proc_set_arg_locations (procserver,
+ _hide_arguments ? 0 : (vm_address_t) argv,
+ _hide_environment ? 0 : (vm_address_t) __environ);
+
+ _hurd_port_free (&_hurd_ports[INIT_PORT_PROC], &ulink, procserver);
+
+ /* Initialize proc server-assisted fault recovery for the signal thread. */
+ _hurdsig_fault_init ();
+
+ /* Call other things which want to do some initialization. These are not
+ on the _hurd_subinit hook because things there assume that things done
+ here, like _hurd_pid, are already initialized. */
+ RUN_HOOK (_hurd_proc_subinit, ());
+
+ if (_hurd_exec_flags & EXEC_TRACED)
+ /* This process is "traced", meaning it should stop on signals or exec.
+ We are all set up now to handle signals. Stop ourselves, to inform
+ our parent (presumably a debugger) that the exec has completed. */
+ _hurd_raise_signal (NULL, SIGTRAP, 0, 0);
+}
+
+/* Called when we get a message telling us to change our proc server port. */
+
+error_t
+_hurd_setproc (process_t procserver)
+{
+ error_t err;
+ mach_port_t oldmsg;
+
+ /* Give the proc server our message port. */
+ if (err = __proc_setmsgport (procserver, _hurd_msgport, &oldmsg))
+ return err;
+ if (oldmsg != MACH_PORT_NULL)
+ /* Deallocate the old msg port we replaced. */
+ __mach_port_deallocate (__mach_task_self (), oldmsg);
+
+ /* Tell the proc server where our args and environment are. */
+ if (err = __proc_set_arg_locations (procserver,
+ /* We don't know the ARGV location. */
+ (vm_address_t) 0,
+ _hide_environment ? 0 :
+ (vm_address_t) __environ))
+ return err;
+
+ /* Those calls worked, so the port looks good. */
+ _hurd_port_set (&_hurd_ports[INIT_PORT_PROC], procserver);
+
+ {
+ pid_t oldpgrp = _hurd_pgrp;
+
+ /* Call these functions again so they can fetch the
+ new information from the new proc server. */
+ RUN_HOOK (_hurd_proc_subinit, ());
+
+ if (_hurd_pgrp != oldpgrp)
+ {
+ /* Run things that want notification of a pgrp change. */
+ DECLARE_HOOK (_hurd_pgrp_changed_hook, (pid_t));
+ RUN_HOOK (_hurd_pgrp_changed_hook, (_hurd_pgrp));
+ }
+ }
+
+ return 0;
+}