1 /* Copyright (C) 1993,94,95,96,97,98,99,2001 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, write to the Free
16 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
25 /* Get types, macros, constants and function declarations
26 for all Mach microkernel interaction. */
28 #include <mach/mig_errors.h>
30 /* Get types and constants necessary for Hurd interfaces. */
31 #include <hurd/hurd_types.h>
33 /* Get MiG stub declarations for commonly used Hurd interfaces. */
34 #include <hurd/auth.h>
35 #include <hurd/process.h>
39 /* Get `struct hurd_port' and related definitions implementing lightweight
40 user references for ports. These are used pervasively throughout the C
41 library; this is here to avoid putting it in nearly every source file. */
42 #include <hurd/port.h>
46 #ifndef _HURD_H_EXTERN_INLINE
47 #define _HURD_H_EXTERN_INLINE extern __inline
50 _HURD_H_EXTERN_INLINE int
51 __hurd_fail (error_t err)
55 case EMACH_SEND_INVALID_DEST:
56 case EMIG_SERVER_DIED:
57 /* The server has disappeared! */
64 case KERN_INVALID_ARGUMENT:
77 /* Basic ports and info, initialized by startup. */
79 extern int _hurd_exec_flags; /* Flags word passed in exec_startup. */
80 extern struct hurd_port *_hurd_ports;
81 extern unsigned int _hurd_nports;
82 extern volatile mode_t _hurd_umask;
83 extern sigset_t _hurdsig_traced;
85 /* Shorthand macro for internal library code referencing _hurd_ports (see
88 #define __USEPORT(which, expr) \
89 HURD_PORT_USE (&_hurd_ports[INIT_PORT_##which], (expr))
91 /* Function version of __USEPORT: calls OPERATE with a send right. */
93 extern error_t _hurd_ports_use (int which, error_t (*operate) (mach_port_t));
96 /* Base address and size of the initial stack set up by the exec server.
97 If using cthreads, this stack is deallocated in startup.
100 extern vm_address_t _hurd_stack_base;
101 extern vm_size_t _hurd_stack_size;
103 /* Initial file descriptor table we were passed at startup. If we are
104 using a real dtable, these are turned into that and then cleared at
105 startup. If not, these are never changed after startup. Not locked. */
107 extern mach_port_t *_hurd_init_dtable;
108 extern mach_msg_type_number_t _hurd_init_dtablesize;
110 /* Current process IDs. */
112 extern pid_t _hurd_pid, _hurd_ppid, _hurd_pgrp;
113 extern int _hurd_orphaned;
115 /* This variable is incremented every time the process IDs change. */
116 extern unsigned int _hurd_pids_changed_stamp;
118 /* This condition is broadcast every time the process IDs change. */
119 extern struct condition _hurd_pids_changed_sync;
121 /* Unix `data break', for brk and sbrk.
122 If brk and sbrk are not used, this info will not be initialized or used. */
125 /* Data break. This is what `sbrk (0)' returns. */
127 extern vm_address_t _hurd_brk;
129 /* End of allocated space. This is generally `round_page (_hurd_brk)'. */
131 extern vm_address_t _hurd_data_end;
133 /* This mutex locks _hurd_brk and _hurd_data_end. */
135 extern struct mutex _hurd_brk_lock;
137 /* Set the data break to NEWBRK; _hurd_brk_lock must
138 be held, and is released on return. */
140 extern int _hurd_set_brk (vm_address_t newbrk);
145 /* Calls to get and set basic ports. */
147 extern error_t _hurd_ports_get (unsigned int which, mach_port_t *result);
148 extern error_t _hurd_ports_set (unsigned int which, mach_port_t newport);
150 extern process_t getproc (void);
151 extern file_t getcwdir (void), getcrdir (void);
152 extern auth_t getauth (void);
153 extern mach_port_t getcttyid (void);
154 extern int setproc (process_t);
155 extern int setcwdir (file_t), setcrdir (file_t);
156 extern int setcttyid (mach_port_t);
158 /* Does reauth with the proc server and fd io servers. */
159 extern int __setauth (auth_t), setauth (auth_t);
162 /* Modify a port cell by looking up a directory name.
163 This verifies that it is a directory and that we have search permission. */
164 extern int _hurd_change_directory_port_from_name (struct hurd_port *portcell,
166 /* Same thing, but using an open file descriptor.
167 Also verifies that it is a directory and that we have search permission. */
168 extern int _hurd_change_directory_port_from_fd (struct hurd_port *portcell,
173 /* Get and set the effective UID set. */
174 extern int geteuids (int __n, uid_t *__uidset);
175 extern int seteuids (int __n, const uid_t *__uidset);
178 /* Split FILE into a directory and a name within the directory. The
179 directory lookup uses the current root and working directory. If
180 successful, stores in *NAME a pointer into FILE where the name
181 within directory begins and returns a port to the directory;
182 otherwise sets `errno' and returns MACH_PORT_NULL. */
184 extern file_t __file_name_split (const char *file, char **name);
185 extern file_t file_name_split (const char *file, char **name);
187 /* Split DIRECTORY into a parent directory and a name within the directory.
188 This is the same as file_name_split, but ignores trailing slashes. */
190 extern file_t __directory_name_split (const char *file, char **name);
191 extern file_t directory_name_split (const char *file, char **name);
193 /* Open a port to FILE with the given FLAGS and MODE (see <fcntl.h>).
194 The file lookup uses the current root and working directory.
195 Returns a port to the file if successful; otherwise sets `errno'
196 and returns MACH_PORT_NULL. */
198 extern file_t __file_name_lookup (const char *file, int flags, mode_t mode);
199 extern file_t file_name_lookup (const char *file, int flags, mode_t mode);
201 /* Open a port to FILE with the given FLAGS and MODE (see <fcntl.h>). The
202 file lookup uses the current root directory, but uses STARTDIR as the
203 "working directory" for file relative names. Returns a port to the file
204 if successful; otherwise sets `errno' and returns MACH_PORT_NULL. */
206 extern file_t __file_name_lookup_under (file_t startdir, const char *file,
207 int flags, mode_t mode);
208 extern file_t file_name_lookup_under (file_t startdir, const char *file,
209 int flags, mode_t mode);
212 /* Lookup FILE_NAME and return the node opened with FLAGS & MODE
213 (see hurd_file_name_lookup for details), but a simple file name (without
214 any directory prefixes) will be consecutively prefixed with the pathnames
215 in the `:' separated list PATH until one succeeds in a successful lookup.
216 If none succeed, then the first error that wasn't ENOENT is returned, or
217 ENOENT if no other errors were returned. If PREFIXED_NAME is non-NULL,
218 then if the result is looked up directly, *PREFIXED_NAME is set to NULL, and
219 if it is looked up using a prefix from PATH, *PREFIXED_NAME is set to
220 malloc'd storage containing the prefixed name. */
221 extern file_t file_name_path_lookup (const char *file_name, const char *path,
222 int flags, mode_t mode,
223 char **prefixed_name);
227 /* Open a file descriptor on a port. FLAGS are as for `open'; flags
228 affected by io_set_openmodes are not changed by this. If successful,
229 this consumes a user reference for PORT (which will be deallocated on
232 extern int openport (io_t port, int flags);
234 /* Open a stream on a port. MODE is as for `fopen'.
235 If successful, this consumes a user reference for PORT
236 (which will be deallocated on fclose). */
238 extern FILE *fopenport (io_t port, const char *mode);
239 extern FILE *__fopenport (io_t port, const char *mode);
242 /* Execute a file, replacing TASK's current program image. */
244 extern error_t _hurd_exec (task_t task,
250 /* Inform the proc server we have exited with STATUS, and kill the
251 task thoroughly. This function never returns, no matter what. */
253 extern void _hurd_exit (int status) __attribute__ ((noreturn));
256 /* Initialize the library data structures from the
257 ints and ports passed to us by the exec server.
258 Then vm_deallocate PORTARRAY and INTARRAY. */
260 extern void _hurd_init (int flags, char **argv,
261 mach_port_t *portarray, size_t portarraysize,
262 int *intarray, size_t intarraysize);
264 /* Do startup handshaking with the proc server, and initialize library data
265 structures that require proc server interaction. This includes
266 initializing signals; see _hurdsig_init in <hurd/signal.h>. */
268 extern void _hurd_proc_init (char **argv,
269 const int *intarray, size_t intarraysize);
272 /* Return the socket server for sockaddr domain DOMAIN. If DEAD is
273 nonzero, remove the old cached port and always do a fresh lookup.
275 It is assumed that a socket server will stay alive during a complex socket
276 operation involving several RPCs. But a socket server may die during
277 long idle periods between socket operations. Callers should first pass
278 zero for DEAD; if the first socket RPC tried on the returned port fails
279 with MACH_SEND_INVALID_DEST or MIG_SERVER_DIED (indicating the server
280 went away), the caller should call _hurd_socket_server again with DEAD
281 nonzero and retry the RPC on the new socket server port. */
283 extern socket_t _hurd_socket_server (int domain, int dead);
285 /* Send a `sig_post' RPC to process number PID. If PID is zero,
286 send the message to all processes in the current process's process group.
287 If PID is < -1, send SIG to all processes in process group - PID.
288 SIG and REFPORT are passed along in the request message. */
290 extern error_t _hurd_sig_post (pid_t pid, int sig, mach_port_t refport);
291 extern error_t hurd_sig_post (pid_t pid, int sig, mach_port_t refport);
293 /* Fetch the host privileged port and device master port from the proc
294 server. They are fetched only once and then cached in the
295 variables below. A special program that gets them from somewhere
296 other than the proc server (such as a bootstrap filesystem) can set
297 these variables to install the ports. */
299 extern kern_return_t __get_privileged_ports (host_priv_t *host_priv_ptr,
300 device_t *device_master_ptr);
301 extern kern_return_t get_privileged_ports (host_priv_t *host_priv_ptr,
302 device_t *device_master_ptr);
303 extern mach_port_t _hurd_host_priv, _hurd_device_master;
305 /* Return the PID of the task whose control port is TASK.
306 On error, sets `errno' and returns -1. */
308 extern pid_t __task2pid (task_t task), task2pid (task_t task);
310 /* Return the task control port of process PID.
311 On error, sets `errno' and returns MACH_PORT_NULL. */
313 extern task_t __pid2task (pid_t pid), pid2task (pid_t pid);
315 /* Return the current thread's thread port. This is a cheap operation (no
316 system call), but it relies on Hurd signal state being set up. */
317 extern thread_t hurd_thread_self (void);
320 /* Cancel pending operations on THREAD. If it is doing an interruptible RPC,
321 that RPC will now return EINTR; otherwise, the "cancelled" flag will be
322 set, causing the next `hurd_check_cancel' call to return nonzero or the
323 next interruptible RPC to return EINTR (whichever is called first). */
324 extern error_t hurd_thread_cancel (thread_t thread);
326 /* Test and clear the calling thread's "cancelled" flag. */
327 extern int hurd_check_cancel (void);
330 /* Return the io server port for file descriptor FD.
331 This adds a Mach user reference to the returned port.
332 On error, sets `errno' and returns MACH_PORT_NULL. */
334 extern io_t __getdport (int fd), getdport (int fd);
339 /* Write formatted output to PORT, a Mach port supporting the i/o protocol,
340 according to the format string FORMAT, using the argument list in ARG. */
341 int vpprintf (io_t port, const char *format, va_list arg);