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bfff8b1b | 1 | /* Copyright (C) 1993-2017 Free Software Foundation, Inc. |
c84142e8 UD |
2 | This file is part of the GNU C Library. |
3 | ||
4 | The GNU C Library is free software; you can redistribute it and/or | |
41bdb6e2 AJ |
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. | |
c84142e8 UD |
8 | |
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 | |
41bdb6e2 | 12 | Lesser General Public License for more details. |
c84142e8 | 13 | |
41bdb6e2 | 14 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 PE |
15 | License along with the GNU C Library; if not, see |
16 | <http://www.gnu.org/licenses/>. */ | |
28f540f4 RM |
17 | |
18 | #ifndef _HURD_H | |
19 | ||
20 | #define _HURD_H 1 | |
21 | #include <features.h> | |
22 | ||
23 | ||
24 | /* Get types, macros, constants and function declarations | |
25 | for all Mach microkernel interaction. */ | |
26 | #include <mach.h> | |
27 | #include <mach/mig_errors.h> | |
28 | ||
29 | /* Get types and constants necessary for Hurd interfaces. */ | |
30 | #include <hurd/hurd_types.h> | |
31 | ||
32 | /* Get MiG stub declarations for commonly used Hurd interfaces. */ | |
33 | #include <hurd/auth.h> | |
34 | #include <hurd/process.h> | |
35 | #include <hurd/fs.h> | |
36 | #include <hurd/io.h> | |
37 | ||
38 | /* Get `struct hurd_port' and related definitions implementing lightweight | |
39 | user references for ports. These are used pervasively throughout the C | |
40 | library; this is here to avoid putting it in nearly every source file. */ | |
41 | #include <hurd/port.h> | |
42 | ||
43 | #include <errno.h> | |
b122c703 | 44 | |
0b32ff01 | 45 | #ifndef _HURD_H_EXTERN_INLINE |
b037a293 | 46 | #define _HURD_H_EXTERN_INLINE __extern_inline |
0b32ff01 RM |
47 | #endif |
48 | ||
49 | _HURD_H_EXTERN_INLINE int | |
b122c703 RM |
50 | __hurd_fail (error_t err) |
51 | { | |
52 | switch (err) | |
53 | { | |
54 | case EMACH_SEND_INVALID_DEST: | |
55 | case EMIG_SERVER_DIED: | |
56 | /* The server has disappeared! */ | |
71be79a2 | 57 | err = (error_t) EIEIO; |
b122c703 RM |
58 | break; |
59 | ||
60 | case KERN_NO_SPACE: | |
71be79a2 | 61 | err = (error_t) ENOMEM; |
b122c703 | 62 | break; |
4f904363 | 63 | |
b122c703 | 64 | case KERN_INVALID_ARGUMENT: |
71be79a2 | 65 | err = (error_t) EINVAL; |
b122c703 RM |
66 | break; |
67 | ||
68 | case 0: | |
69 | return 0; | |
4f904363 | 70 | |
b122c703 | 71 | default: |
4f904363 | 72 | break; |
b122c703 RM |
73 | } |
74 | ||
75 | errno = err; | |
76 | return -1; | |
77 | } | |
28f540f4 RM |
78 | \f |
79 | /* Basic ports and info, initialized by startup. */ | |
80 | ||
81 | extern int _hurd_exec_flags; /* Flags word passed in exec_startup. */ | |
82 | extern struct hurd_port *_hurd_ports; | |
83 | extern unsigned int _hurd_nports; | |
5ca3ec06 | 84 | extern mode_t _hurd_umask; |
8f0c527e | 85 | extern sigset_t _hurdsig_traced; |
28f540f4 | 86 | |
8f5ca04b RM |
87 | /* Shorthand macro for internal library code referencing _hurd_ports (see |
88 | <hurd/port.h>). */ | |
28f540f4 RM |
89 | |
90 | #define __USEPORT(which, expr) \ | |
91 | HURD_PORT_USE (&_hurd_ports[INIT_PORT_##which], (expr)) | |
92 | ||
8f5ca04b RM |
93 | /* Function version of __USEPORT: calls OPERATE with a send right. */ |
94 | ||
95 | extern error_t _hurd_ports_use (int which, error_t (*operate) (mach_port_t)); | |
96 | ||
28f540f4 RM |
97 | |
98 | /* Base address and size of the initial stack set up by the exec server. | |
99 | If using cthreads, this stack is deallocated in startup. | |
100 | Not locked. */ | |
101 | ||
102 | extern vm_address_t _hurd_stack_base; | |
103 | extern vm_size_t _hurd_stack_size; | |
104 | ||
105 | /* Initial file descriptor table we were passed at startup. If we are | |
106 | using a real dtable, these are turned into that and then cleared at | |
107 | startup. If not, these are never changed after startup. Not locked. */ | |
108 | ||
109 | extern mach_port_t *_hurd_init_dtable; | |
110 | extern mach_msg_type_number_t _hurd_init_dtablesize; | |
111 | \f | |
112 | /* Current process IDs. */ | |
113 | ||
114 | extern pid_t _hurd_pid, _hurd_ppid, _hurd_pgrp; | |
115 | extern int _hurd_orphaned; | |
116 | ||
117 | /* This variable is incremented every time the process IDs change. */ | |
6bac11d9 | 118 | extern unsigned int _hurd_pids_changed_stamp; |
28f540f4 RM |
119 | |
120 | /* This condition is broadcast every time the process IDs change. */ | |
6bac11d9 | 121 | extern struct condition _hurd_pids_changed_sync; |
28f540f4 RM |
122 | \f |
123 | /* Unix `data break', for brk and sbrk. | |
124 | If brk and sbrk are not used, this info will not be initialized or used. */ | |
125 | ||
126 | ||
127 | /* Data break. This is what `sbrk (0)' returns. */ | |
128 | ||
129 | extern vm_address_t _hurd_brk; | |
130 | ||
131 | /* End of allocated space. This is generally `round_page (_hurd_brk)'. */ | |
132 | ||
133 | extern vm_address_t _hurd_data_end; | |
134 | ||
135 | /* This mutex locks _hurd_brk and _hurd_data_end. */ | |
136 | ||
137 | extern struct mutex _hurd_brk_lock; | |
138 | ||
139 | /* Set the data break to NEWBRK; _hurd_brk_lock must | |
140 | be held, and is released on return. */ | |
141 | ||
142 | extern int _hurd_set_brk (vm_address_t newbrk); | |
143 | \f | |
144 | #define __need_FILE | |
145 | #include <stdio.h> | |
146 | ||
147 | /* Calls to get and set basic ports. */ | |
148 | ||
1e9dc039 RM |
149 | extern error_t _hurd_ports_get (unsigned int which, mach_port_t *result); |
150 | extern error_t _hurd_ports_set (unsigned int which, mach_port_t newport); | |
28f540f4 RM |
151 | |
152 | extern process_t getproc (void); | |
153 | extern file_t getcwdir (void), getcrdir (void); | |
154 | extern auth_t getauth (void); | |
1d8dc429 | 155 | extern mach_port_t getcttyid (void); |
28f540f4 RM |
156 | extern int setproc (process_t); |
157 | extern int setcwdir (file_t), setcrdir (file_t); | |
158 | extern int setcttyid (mach_port_t); | |
159 | ||
160 | /* Does reauth with the proc server and fd io servers. */ | |
161 | extern int __setauth (auth_t), setauth (auth_t); | |
162 | ||
163 | ||
e8f51d56 RM |
164 | /* Modify a port cell by looking up a directory name. |
165 | This verifies that it is a directory and that we have search permission. */ | |
166 | extern int _hurd_change_directory_port_from_name (struct hurd_port *portcell, | |
167 | const char *name); | |
168 | /* Same thing, but using an open file descriptor. | |
169 | Also verifies that it is a directory and that we have search permission. */ | |
170 | extern int _hurd_change_directory_port_from_fd (struct hurd_port *portcell, | |
171 | int fd); | |
172 | ||
173 | ||
174 | ||
2d6d0728 RM |
175 | /* Get and set the effective UID set. */ |
176 | extern int geteuids (int __n, uid_t *__uidset); | |
177 | extern int seteuids (int __n, const uid_t *__uidset); | |
178 | ||
179 | ||
28f540f4 RM |
180 | /* Split FILE into a directory and a name within the directory. The |
181 | directory lookup uses the current root and working directory. If | |
182 | successful, stores in *NAME a pointer into FILE where the name | |
183 | within directory begins and returns a port to the directory; | |
184 | otherwise sets `errno' and returns MACH_PORT_NULL. */ | |
185 | ||
186 | extern file_t __file_name_split (const char *file, char **name); | |
187 | extern file_t file_name_split (const char *file, char **name); | |
188 | ||
0bd01927 RM |
189 | /* Split DIRECTORY into a parent directory and a name within the directory. |
190 | This is the same as file_name_split, but ignores trailing slashes. */ | |
191 | ||
192 | extern file_t __directory_name_split (const char *file, char **name); | |
193 | extern file_t directory_name_split (const char *file, char **name); | |
194 | ||
28f540f4 RM |
195 | /* Open a port to FILE with the given FLAGS and MODE (see <fcntl.h>). |
196 | The file lookup uses the current root and working directory. | |
197 | Returns a port to the file if successful; otherwise sets `errno' | |
198 | and returns MACH_PORT_NULL. */ | |
199 | ||
200 | extern file_t __file_name_lookup (const char *file, int flags, mode_t mode); | |
201 | extern file_t file_name_lookup (const char *file, int flags, mode_t mode); | |
202 | ||
8f5ca04b RM |
203 | /* Open a port to FILE with the given FLAGS and MODE (see <fcntl.h>). The |
204 | file lookup uses the current root directory, but uses STARTDIR as the | |
205 | "working directory" for file relative names. Returns a port to the file | |
206 | if successful; otherwise sets `errno' and returns MACH_PORT_NULL. */ | |
28f540f4 | 207 | |
8f5ca04b RM |
208 | extern file_t __file_name_lookup_under (file_t startdir, const char *file, |
209 | int flags, mode_t mode); | |
210 | extern file_t file_name_lookup_under (file_t startdir, const char *file, | |
211 | int flags, mode_t mode); | |
28f540f4 RM |
212 | |
213 | ||
8f0c527e RM |
214 | /* Lookup FILE_NAME and return the node opened with FLAGS & MODE |
215 | (see hurd_file_name_lookup for details), but a simple file name (without | |
216 | any directory prefixes) will be consecutively prefixed with the pathnames | |
217 | in the `:' separated list PATH until one succeeds in a successful lookup. | |
218 | If none succeed, then the first error that wasn't ENOENT is returned, or | |
219 | ENOENT if no other errors were returned. If PREFIXED_NAME is non-NULL, | |
220 | then if the result is looked up directly, *PREFIXED_NAME is set to NULL, and | |
221 | if it is looked up using a prefix from PATH, *PREFIXED_NAME is set to | |
222 | malloc'd storage containing the prefixed name. */ | |
223 | extern file_t file_name_path_lookup (const char *file_name, const char *path, | |
224 | int flags, mode_t mode, | |
225 | char **prefixed_name); | |
226 | ||
227 | ||
228 | ||
28f540f4 RM |
229 | /* Open a file descriptor on a port. FLAGS are as for `open'; flags |
230 | affected by io_set_openmodes are not changed by this. If successful, | |
231 | this consumes a user reference for PORT (which will be deallocated on | |
232 | close). */ | |
233 | ||
234 | extern int openport (io_t port, int flags); | |
235 | ||
236 | /* Open a stream on a port. MODE is as for `fopen'. | |
237 | If successful, this consumes a user reference for PORT | |
238 | (which will be deallocated on fclose). */ | |
239 | ||
240 | extern FILE *fopenport (io_t port, const char *mode); | |
241 | extern FILE *__fopenport (io_t port, const char *mode); | |
242 | ||
243 | ||
244 | /* Execute a file, replacing TASK's current program image. */ | |
245 | ||
246 | extern error_t _hurd_exec (task_t task, | |
247 | file_t file, | |
248 | char *const argv[], | |
249 | char *const envp[]); | |
250 | ||
251 | ||
6d52618b | 252 | /* Inform the proc server we have exited with STATUS, and kill the |
28f540f4 RM |
253 | task thoroughly. This function never returns, no matter what. */ |
254 | ||
255 | extern void _hurd_exit (int status) __attribute__ ((noreturn)); | |
256 | ||
257 | ||
258 | /* Initialize the library data structures from the | |
259 | ints and ports passed to us by the exec server. | |
260 | Then vm_deallocate PORTARRAY and INTARRAY. */ | |
261 | ||
262 | extern void _hurd_init (int flags, char **argv, | |
263 | mach_port_t *portarray, size_t portarraysize, | |
264 | int *intarray, size_t intarraysize); | |
265 | ||
62495816 RM |
266 | /* Do startup handshaking with the proc server, and initialize library data |
267 | structures that require proc server interaction. This includes | |
268 | initializing signals; see _hurdsig_init in <hurd/signal.h>. */ | |
28f540f4 | 269 | |
62495816 RM |
270 | extern void _hurd_proc_init (char **argv, |
271 | const int *intarray, size_t intarraysize); | |
28f540f4 RM |
272 | |
273 | ||
274 | /* Return the socket server for sockaddr domain DOMAIN. If DEAD is | |
275 | nonzero, remove the old cached port and always do a fresh lookup. | |
276 | ||
277 | It is assumed that a socket server will stay alive during a complex socket | |
278 | operation involving several RPCs. But a socket server may die during | |
279 | long idle periods between socket operations. Callers should first pass | |
280 | zero for DEAD; if the first socket RPC tried on the returned port fails | |
281 | with MACH_SEND_INVALID_DEST or MIG_SERVER_DIED (indicating the server | |
282 | went away), the caller should call _hurd_socket_server again with DEAD | |
283 | nonzero and retry the RPC on the new socket server port. */ | |
284 | ||
285 | extern socket_t _hurd_socket_server (int domain, int dead); | |
286 | ||
287 | /* Send a `sig_post' RPC to process number PID. If PID is zero, | |
288 | send the message to all processes in the current process's process group. | |
289 | If PID is < -1, send SIG to all processes in process group - PID. | |
290 | SIG and REFPORT are passed along in the request message. */ | |
291 | ||
292 | extern error_t _hurd_sig_post (pid_t pid, int sig, mach_port_t refport); | |
293 | extern error_t hurd_sig_post (pid_t pid, int sig, mach_port_t refport); | |
294 | ||
295 | /* Fetch the host privileged port and device master port from the proc | |
296 | server. They are fetched only once and then cached in the | |
297 | variables below. A special program that gets them from somewhere | |
298 | other than the proc server (such as a bootstrap filesystem) can set | |
299 | these variables to install the ports. */ | |
300 | ||
f58f41f1 | 301 | extern kern_return_t __get_privileged_ports (mach_port_t *host_priv_ptr, |
5017b2c8 | 302 | device_t *device_master_ptr); |
f58f41f1 | 303 | extern kern_return_t get_privileged_ports (mach_port_t *host_priv_ptr, |
28f540f4 RM |
304 | device_t *device_master_ptr); |
305 | extern mach_port_t _hurd_host_priv, _hurd_device_master; | |
306 | ||
307 | /* Return the PID of the task whose control port is TASK. | |
308 | On error, sets `errno' and returns -1. */ | |
309 | ||
310 | extern pid_t __task2pid (task_t task), task2pid (task_t task); | |
311 | ||
312 | /* Return the task control port of process PID. | |
313 | On error, sets `errno' and returns MACH_PORT_NULL. */ | |
314 | ||
315 | extern task_t __pid2task (pid_t pid), pid2task (pid_t pid); | |
316 | ||
ded29119 RM |
317 | /* Return the current thread's thread port. This is a cheap operation (no |
318 | system call), but it relies on Hurd signal state being set up. */ | |
319 | extern thread_t hurd_thread_self (void); | |
320 | ||
28f540f4 | 321 | |
54da5be3 RM |
322 | /* Cancel pending operations on THREAD. If it is doing an interruptible RPC, |
323 | that RPC will now return EINTR; otherwise, the "cancelled" flag will be | |
324 | set, causing the next `hurd_check_cancel' call to return nonzero or the | |
325 | next interruptible RPC to return EINTR (whichever is called first). */ | |
326 | extern error_t hurd_thread_cancel (thread_t thread); | |
327 | ||
328 | /* Test and clear the calling thread's "cancelled" flag. */ | |
329 | extern int hurd_check_cancel (void); | |
330 | ||
331 | ||
28f540f4 RM |
332 | /* Return the io server port for file descriptor FD. |
333 | This adds a Mach user reference to the returned port. | |
334 | On error, sets `errno' and returns MACH_PORT_NULL. */ | |
335 | ||
336 | extern io_t __getdport (int fd), getdport (int fd); | |
337 | ||
338 | ||
0d8733c4 UD |
339 | #include <stdarg.h> |
340 | ||
341 | /* Write formatted output to PORT, a Mach port supporting the i/o protocol, | |
342 | according to the format string FORMAT, using the argument list in ARG. */ | |
343 | int vpprintf (io_t port, const char *format, va_list arg); | |
344 | ||
345 | ||
28f540f4 | 346 | #endif /* hurd.h */ |