initial import

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+/* Copyright (C) 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.  */
+
+#ifndef	_HURD_H
+
+#define	_HURD_H	1
+#include <features.h>
+
+
+/* Get types, macros, constants and function declarations
+   for all Mach microkernel interaction.  */
+#include <mach.h>
+#include <mach/mig_errors.h>
+
+/* Get types and constants necessary for Hurd interfaces.  */
+#include <hurd/hurd_types.h>
+
+/* Get MiG stub declarations for commonly used Hurd interfaces.  */
+#include <hurd/auth.h>
+#include <hurd/process.h>
+#include <hurd/fs.h>
+#include <hurd/io.h>
+
+/* Get `struct hurd_port' and related definitions implementing lightweight
+   user references for ports.  These are used pervasively throughout the C
+   library; this is here to avoid putting it in nearly every source file.  */
+#include <hurd/port.h>
+
+#include <errno.h>
+#define	__hurd_fail(err)	(errno = (err), -1)
+
+/* Basic ports and info, initialized by startup.  */
+
+extern int _hurd_exec_flags;	/* Flags word passed in exec_startup.  */
+extern struct hurd_port *_hurd_ports;
+extern unsigned int _hurd_nports;
+extern volatile mode_t _hurd_umask;
+
+/* Shorthand macro for referencing _hurd_ports (see <hurd/port.h>).  */
+
+#define	__USEPORT(which, expr) \
+  HURD_PORT_USE (&_hurd_ports[INIT_PORT_##which], (expr))
+
+
+/* Base address and size of the initial stack set up by the exec server.
+   If using cthreads, this stack is deallocated in startup.
+   Not locked.  */
+
+extern vm_address_t _hurd_stack_base;
+extern vm_size_t _hurd_stack_size;
+
+/* Initial file descriptor table we were passed at startup.  If we are
+   using a real dtable, these are turned into that and then cleared at
+   startup.  If not, these are never changed after startup.  Not locked.  */
+
+extern mach_port_t *_hurd_init_dtable;
+extern mach_msg_type_number_t _hurd_init_dtablesize;
+
+/* Current process IDs.  */
+
+extern pid_t _hurd_pid, _hurd_ppid, _hurd_pgrp;
+extern int _hurd_orphaned;
+
+/* This variable is incremented every time the process IDs change.  */
+
+unsigned int _hurd_pids_changed_stamp;
+
+/* This condition is broadcast every time the process IDs change.  */
+struct condition _hurd_pids_changed_sync;
+
+/* Unix `data break', for brk and sbrk.
+   If brk and sbrk are not used, this info will not be initialized or used.  */
+
+
+/* Data break.  This is what `sbrk (0)' returns.  */
+
+extern vm_address_t _hurd_brk;
+
+/* End of allocated space.  This is generally `round_page (_hurd_brk)'.  */
+
+extern vm_address_t _hurd_data_end;
+
+/* This mutex locks _hurd_brk and _hurd_data_end.  */
+
+extern struct mutex _hurd_brk_lock;
+
+/* Set the data break to NEWBRK; _hurd_brk_lock must
+   be held, and is released on return.  */
+
+extern int _hurd_set_brk (vm_address_t newbrk);
+
+#define __need_FILE
+#include <stdio.h>
+
+/* Calls to get and set basic ports.  */
+
+extern error_t _hurd_ports_get (int which, mach_port_t *result);
+extern error_t _hurd_ports_set (int which, mach_port_t newport);
+
+extern process_t getproc (void);
+extern file_t getcwdir (void), getcrdir (void);
+extern auth_t getauth (void);
+extern mach_port_t getcttyid ();
+extern int setproc (process_t);
+extern int setcwdir (file_t), setcrdir (file_t);
+extern int setcttyid (mach_port_t);
+
+/* Does reauth with the proc server and fd io servers.  */
+extern int __setauth (auth_t), setauth (auth_t);
+
+
+/* Split FILE into a directory and a name within the directory.  Look up a
+   port for the directory and store it in *DIR; store in *NAME a pointer
+   into FILE where the name within directory begins.  The directory lookup
+   uses CRDIR for the root directory and CWDIR for the current directory.
+   Returns zero on success or an error code.  */
+
+extern error_t __hurd_file_name_split (file_t crdir, file_t cwdir,
+				       const char *file,
+				       file_t *dir, char **name);
+extern error_t hurd_file_name_split (file_t crdir, file_t cwdir,
+				     const char *file,
+				     file_t *dir, char **name);
+
+/* Open a port to FILE with the given FLAGS and MODE (see <fcntl.h>).
+   The file lookup uses CRDIR for the root directory and CWDIR for the
+   current directory.  If successful, returns zero and store the port
+   to FILE in *PORT; otherwise returns an error code. */
+
+extern error_t __hurd_file_name_lookup (file_t crdir, file_t cwdir,
+					const char *file,
+					int flags, mode_t mode,
+					file_t *port);
+extern error_t hurd_file_name_lookup (file_t crdir, file_t cwdir,
+				      const char *filename,
+				      int flags, mode_t mode,
+				      file_t *port);
+
+/* Process the values returned by `dir_lookup' et al, and loop doing
+   `dir_lookup' calls until one returns FS_RETRY_NONE.  CRDIR is the
+   root directory used for things like symlinks to absolute file names; the
+   other arguments should be those just passed to and/or returned from
+   `dir_lookup', `fsys_getroot', or `file_invoke_translator'.  This
+   function consumes the reference in *RESULT even if it returns an error.  */
+
+extern error_t __hurd_file_name_lookup_retry (file_t crdir,
+					      enum retry_type doretry,
+					      char retryname[1024],
+					      int flags, mode_t mode,
+					      file_t *result);
+extern error_t hurd_file_name_lookup_retry (file_t crdir,
+					    enum retry_type doretry,
+					    char retryname[1024],
+					    int flags, mode_t mode,
+					    file_t *result);
+
+
+/* Split FILE into a directory and a name within the directory.  The
+   directory lookup uses the current root and working directory.  If
+   successful, stores in *NAME a pointer into FILE where the name
+   within directory begins and returns a port to the directory;
+   otherwise sets `errno' and returns MACH_PORT_NULL.  */
+
+extern file_t __file_name_split (const char *file, char **name);
+extern file_t file_name_split (const char *file, char **name);
+
+/* Open a port to FILE with the given FLAGS and MODE (see <fcntl.h>).
+   The file lookup uses the current root and working directory.
+   Returns a port to the file if successful; otherwise sets `errno'
+   and returns MACH_PORT_NULL.  */
+
+extern file_t __file_name_lookup (const char *file, int flags, mode_t mode);
+extern file_t file_name_lookup (const char *file, int flags, mode_t mode);
+
+/* Invoke any translator set on the node FILE represents, and return in
+   *TRANSLATED a port to the translated node.  FLAGS are as for
+   `dir_lookup' et al, but the returned port will not necessarily have
+   any more access rights than FILE does.  */
+
+extern error_t __hurd_invoke_translator (file_t file, int flags,
+					 file_t *translated);
+extern error_t hurd_invoke_translator (file_t file, int flags,
+				       file_t *translated);
+
+
+/* Open a file descriptor on a port.  FLAGS are as for `open'; flags
+   affected by io_set_openmodes are not changed by this.  If successful,
+   this consumes a user reference for PORT (which will be deallocated on
+   close).  */
+
+extern int openport (io_t port, int flags);
+
+/* Open a stream on a port.  MODE is as for `fopen'.
+   If successful, this consumes a user reference for PORT
+   (which will be deallocated on fclose).  */
+
+extern FILE *fopenport (io_t port, const char *mode);
+extern FILE *__fopenport (io_t port, const char *mode);
+
+
+/* Execute a file, replacing TASK's current program image.  */
+
+extern error_t _hurd_exec (task_t task,
+			   file_t file,
+			   char *const argv[],
+			   char *const envp[]);
+
+
+/* Inform the proc server we have exitted with STATUS, and kill the
+   task thoroughly.  This function never returns, no matter what.  */
+
+extern void _hurd_exit (int status) __attribute__ ((noreturn));
+
+
+/* Initialize the library data structures from the
+   ints and ports passed to us by the exec server.
+   Then vm_deallocate PORTARRAY and INTARRAY.  */
+
+extern void _hurd_init (int flags, char **argv,
+			mach_port_t *portarray, size_t portarraysize,
+			int *intarray, size_t intarraysize);
+
+/* Do startup handshaking with the proc server.  */
+
+extern void _hurd_proc_init (char **argv);
+
+
+/* Return the socket server for sockaddr domain DOMAIN.  If DEAD is
+   nonzero, remove the old cached port and always do a fresh lookup.
+
+   It is assumed that a socket server will stay alive during a complex socket
+   operation involving several RPCs.  But a socket server may die during
+   long idle periods between socket operations.  Callers should first pass
+   zero for DEAD; if the first socket RPC tried on the returned port fails
+   with MACH_SEND_INVALID_DEST or MIG_SERVER_DIED (indicating the server
+   went away), the caller should call _hurd_socket_server again with DEAD
+   nonzero and retry the RPC on the new socket server port.  */
+
+extern socket_t _hurd_socket_server (int domain, int dead);
+
+/* Send a `sig_post' RPC to process number PID.  If PID is zero,
+   send the message to all processes in the current process's process group.
+   If PID is < -1, send SIG to all processes in process group - PID.
+   SIG and REFPORT are passed along in the request message.  */
+
+extern error_t _hurd_sig_post (pid_t pid, int sig, mach_port_t refport);
+extern error_t hurd_sig_post (pid_t pid, int sig, mach_port_t refport);
+
+/* Fetch the host privileged port and device master port from the proc
+   server.  They are fetched only once and then cached in the
+   variables below.  A special program that gets them from somewhere
+   other than the proc server (such as a bootstrap filesystem) can set
+   these variables to install the ports.  */
+
+extern kern_return_t get_privileged_ports (host_priv_t *host_priv_ptr,
+					   device_t *device_master_ptr);
+extern mach_port_t _hurd_host_priv, _hurd_device_master;
+
+/* Return the PID of the task whose control port is TASK.
+   On error, sets `errno' and returns -1.  */
+
+extern pid_t __task2pid (task_t task), task2pid (task_t task);
+
+/* Return the task control port of process PID.
+   On error, sets `errno' and returns MACH_PORT_NULL.  */
+
+extern task_t __pid2task (pid_t pid), pid2task (pid_t pid);
+
+
+/* Return the io server port for file descriptor FD.
+   This adds a Mach user reference to the returned port.
+   On error, sets `errno' and returns MACH_PORT_NULL.  */
+
+extern io_t __getdport (int fd), getdport (int fd);
+
+
+#endif	/* hurd.h */