xf.li | bdd93d5 | 2023-05-12 07:10:14 -0700 | [diff] [blame] | 1 | /* Copyright (C) 1992-2016 Free Software Foundation, Inc. |
| 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 |
| 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. |
| 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 |
| 12 | Lesser General Public License for more details. |
| 13 | |
| 14 | You should have received a copy of the GNU Lesser General Public |
| 15 | License along with the GNU C Library; if not, see |
| 16 | <http://www.gnu.org/licenses/>. */ |
| 17 | |
| 18 | #include <hurd.h> |
| 19 | #include <hurd/msg_server.h> |
| 20 | #include <hurd/fd.h> |
| 21 | #include <unistd.h> |
| 22 | #include <limits.h> |
| 23 | #include <string.h> |
| 24 | #include <argz.h> |
| 25 | |
| 26 | |
| 27 | #define AUTHCHECK \ |
| 28 | if (auth != mach_task_self () && ! __USEPORT (AUTH, port == auth)) \ |
| 29 | return EPERM |
| 30 | |
| 31 | |
| 32 | /* Snarfing and frobbing the init ports. */ |
| 33 | |
| 34 | kern_return_t |
| 35 | _S_msg_get_init_port (mach_port_t msgport, mach_port_t auth, int which, |
| 36 | mach_port_t *result, mach_msg_type_name_t *result_type) |
| 37 | { |
| 38 | AUTHCHECK; |
| 39 | *result_type = MACH_MSG_TYPE_MOVE_SEND; |
| 40 | /* This function adds a new user reference for the *RESULT it gives back. |
| 41 | Our reply message uses a move-send right that consumes this reference. */ |
| 42 | return _hurd_ports_get (which, result); |
| 43 | } |
| 44 | |
| 45 | kern_return_t |
| 46 | _S_msg_set_init_port (mach_port_t msgport, mach_port_t auth, |
| 47 | int which, mach_port_t port) |
| 48 | { |
| 49 | error_t err; |
| 50 | |
| 51 | AUTHCHECK; |
| 52 | |
| 53 | err = _hurd_ports_set (which, port); |
| 54 | if (err == 0) |
| 55 | __mach_port_deallocate (__mach_task_self (), port); |
| 56 | |
| 57 | return 0; |
| 58 | } |
| 59 | |
| 60 | kern_return_t |
| 61 | _S_msg_get_init_ports (mach_port_t msgport, mach_port_t auth, |
| 62 | mach_port_t **ports, |
| 63 | mach_msg_type_name_t *ports_type, |
| 64 | mach_msg_type_number_t *nports) |
| 65 | { |
| 66 | mach_msg_type_number_t i; |
| 67 | error_t err; |
| 68 | |
| 69 | AUTHCHECK; |
| 70 | |
| 71 | if (err = __vm_allocate (__mach_task_self (), (vm_address_t *) ports, |
| 72 | _hurd_nports * sizeof (mach_port_t), 1)) |
| 73 | return err; |
| 74 | *nports = _hurd_nports; |
| 75 | |
| 76 | for (i = 0; i < _hurd_nports; ++i) |
| 77 | /* This function adds a new user ref for the *RESULT it gives back. |
| 78 | Our reply message uses move-send rights that consumes this ref. */ |
| 79 | if (err = _hurd_ports_get (i, &(*ports)[i])) |
| 80 | { |
| 81 | /* Died part way through. Deallocate the ports already fetched. */ |
| 82 | while (i-- > 0) |
| 83 | __mach_port_deallocate (__mach_task_self (), (*ports)[i]); |
| 84 | __vm_deallocate (__mach_task_self (), |
| 85 | (vm_address_t) *ports, |
| 86 | *nports * sizeof (mach_port_t)); |
| 87 | return err; |
| 88 | } |
| 89 | |
| 90 | *ports_type = MACH_MSG_TYPE_MOVE_SEND; |
| 91 | return 0; |
| 92 | } |
| 93 | |
| 94 | kern_return_t |
| 95 | _S_msg_set_init_ports (mach_port_t msgport, mach_port_t auth, |
| 96 | mach_port_t *ports, mach_msg_type_number_t nports) |
| 97 | { |
| 98 | mach_msg_type_number_t i; |
| 99 | error_t err; |
| 100 | |
| 101 | AUTHCHECK; |
| 102 | |
| 103 | for (i = 0; i < _hurd_nports; ++i) |
| 104 | { |
| 105 | if (err = _hurd_ports_set (i, ports[i])) |
| 106 | return err; |
| 107 | else |
| 108 | __mach_port_deallocate (__mach_task_self (), ports[i]); |
| 109 | } |
| 110 | |
| 111 | return 0; |
| 112 | } |
| 113 | |
| 114 | /* Snarfing and frobbing the init ints. */ |
| 115 | |
| 116 | static kern_return_t |
| 117 | get_int (int which, int *value) |
| 118 | { |
| 119 | switch (which) |
| 120 | { |
| 121 | case INIT_UMASK: |
| 122 | *value = _hurd_umask; |
| 123 | return 0; |
| 124 | case INIT_SIGMASK: |
| 125 | { |
| 126 | struct hurd_sigstate *ss = _hurd_thread_sigstate (_hurd_sigthread); |
| 127 | __spin_lock (&ss->lock); |
| 128 | *value = ss->blocked; |
| 129 | __spin_unlock (&ss->lock); |
| 130 | return 0; |
| 131 | } |
| 132 | case INIT_SIGPENDING: |
| 133 | { |
| 134 | struct hurd_sigstate *ss = _hurd_thread_sigstate (_hurd_sigthread); |
| 135 | __spin_lock (&ss->lock); |
| 136 | *value = ss->pending; |
| 137 | __spin_unlock (&ss->lock); |
| 138 | return 0; |
| 139 | } |
| 140 | case INIT_SIGIGN: |
| 141 | { |
| 142 | struct hurd_sigstate *ss = _hurd_thread_sigstate (_hurd_sigthread); |
| 143 | sigset_t ign; |
| 144 | int sig; |
| 145 | __spin_lock (&ss->lock); |
| 146 | __sigemptyset (&ign); |
| 147 | for (sig = 1; sig < NSIG; ++sig) |
| 148 | if (ss->actions[sig].sa_handler == SIG_IGN) |
| 149 | __sigaddset (&ign, sig); |
| 150 | __spin_unlock (&ss->lock); |
| 151 | *value = ign; |
| 152 | return 0; |
| 153 | } |
| 154 | default: |
| 155 | return EINVAL; |
| 156 | } |
| 157 | } |
| 158 | |
| 159 | kern_return_t |
| 160 | _S_msg_get_init_int (mach_port_t msgport, mach_port_t auth, |
| 161 | int which, int *value) |
| 162 | { |
| 163 | AUTHCHECK; |
| 164 | |
| 165 | return get_int (which, value); |
| 166 | } |
| 167 | |
| 168 | kern_return_t |
| 169 | _S_msg_get_init_ints (mach_port_t msgport, mach_port_t auth, |
| 170 | int **values, mach_msg_type_number_t *nvalues) |
| 171 | { |
| 172 | error_t err; |
| 173 | mach_msg_type_number_t i; |
| 174 | |
| 175 | AUTHCHECK; |
| 176 | |
| 177 | if (err = __vm_allocate (__mach_task_self (), (vm_address_t *) values, |
| 178 | INIT_INT_MAX * sizeof (int), 1)) |
| 179 | return err; |
| 180 | *nvalues = INIT_INT_MAX; |
| 181 | |
| 182 | for (i = 0; i < INIT_INT_MAX; ++i) |
| 183 | switch (err = get_int (i, &(*values)[i])) |
| 184 | { |
| 185 | case 0: /* Success. */ |
| 186 | break; |
| 187 | case EINVAL: /* Unknown index. */ |
| 188 | (*values)[i] = 0; |
| 189 | break; |
| 190 | default: /* Lossage. */ |
| 191 | __vm_deallocate (__mach_task_self (), |
| 192 | (vm_address_t) *values, INIT_INT_MAX * sizeof (int)); |
| 193 | return err; |
| 194 | } |
| 195 | |
| 196 | return 0; |
| 197 | } |
| 198 | |
| 199 | |
| 200 | static kern_return_t |
| 201 | set_int (int which, int value) |
| 202 | { |
| 203 | switch (which) |
| 204 | { |
| 205 | case INIT_UMASK: |
| 206 | _hurd_umask = value; |
| 207 | return 0; |
| 208 | |
| 209 | /* These are pretty odd things to do. But you asked for it. */ |
| 210 | case INIT_SIGMASK: |
| 211 | { |
| 212 | struct hurd_sigstate *ss = _hurd_thread_sigstate (_hurd_sigthread); |
| 213 | __spin_lock (&ss->lock); |
| 214 | ss->blocked = value; |
| 215 | __spin_unlock (&ss->lock); |
| 216 | return 0; |
| 217 | } |
| 218 | case INIT_SIGPENDING: |
| 219 | { |
| 220 | struct hurd_sigstate *ss = _hurd_thread_sigstate (_hurd_sigthread); |
| 221 | __spin_lock (&ss->lock); |
| 222 | ss->pending = value; |
| 223 | __spin_unlock (&ss->lock); |
| 224 | return 0; |
| 225 | } |
| 226 | case INIT_SIGIGN: |
| 227 | { |
| 228 | struct hurd_sigstate *ss = _hurd_thread_sigstate (_hurd_sigthread); |
| 229 | int sig; |
| 230 | const sigset_t ign = value; |
| 231 | __spin_lock (&ss->lock); |
| 232 | for (sig = 1; sig < NSIG; ++sig) |
| 233 | { |
| 234 | if (__sigismember (&ign, sig)) |
| 235 | ss->actions[sig].sa_handler = SIG_IGN; |
| 236 | else if (ss->actions[sig].sa_handler == SIG_IGN) |
| 237 | ss->actions[sig].sa_handler = SIG_DFL; |
| 238 | } |
| 239 | __spin_unlock (&ss->lock); |
| 240 | return 0; |
| 241 | |
| 242 | case INIT_TRACEMASK: |
| 243 | _hurdsig_traced = value; |
| 244 | return 0; |
| 245 | } |
| 246 | default: |
| 247 | return EINVAL; |
| 248 | } |
| 249 | } |
| 250 | |
| 251 | kern_return_t |
| 252 | _S_msg_set_init_int (mach_port_t msgport, mach_port_t auth, |
| 253 | int which, int value) |
| 254 | { |
| 255 | AUTHCHECK; |
| 256 | |
| 257 | return set_int (which, value); |
| 258 | } |
| 259 | |
| 260 | kern_return_t |
| 261 | _S_msg_set_init_ints (mach_port_t msgport, mach_port_t auth, |
| 262 | int *values, mach_msg_type_number_t nvalues) |
| 263 | { |
| 264 | error_t err; |
| 265 | mach_msg_type_number_t i; |
| 266 | |
| 267 | AUTHCHECK; |
| 268 | |
| 269 | for (i = 0; i < INIT_INT_MAX; ++i) |
| 270 | switch (err = set_int (i, values[i])) |
| 271 | { |
| 272 | case 0: /* Success. */ |
| 273 | break; |
| 274 | case EINVAL: /* Unknown index. */ |
| 275 | break; |
| 276 | default: /* Lossage. */ |
| 277 | return err; |
| 278 | } |
| 279 | |
| 280 | return 0; |
| 281 | } |
| 282 | |
| 283 | |
| 284 | kern_return_t |
| 285 | _S_msg_get_fd (mach_port_t msgport, mach_port_t auth, int which, |
| 286 | mach_port_t *result, mach_msg_type_name_t *result_type) |
| 287 | { |
| 288 | AUTHCHECK; |
| 289 | |
| 290 | /* This creates a new user reference for the send right. |
| 291 | Our reply message will move that reference to the caller. */ |
| 292 | *result = __getdport (which); |
| 293 | if (*result == MACH_PORT_NULL) |
| 294 | return errno; |
| 295 | *result_type = MACH_MSG_TYPE_MOVE_SEND; |
| 296 | |
| 297 | return 0; |
| 298 | } |
| 299 | |
| 300 | kern_return_t |
| 301 | _S_msg_set_fd (mach_port_t msgport, mach_port_t auth, |
| 302 | int which, mach_port_t port) |
| 303 | { |
| 304 | AUTHCHECK; |
| 305 | |
| 306 | /* We consume the reference if successful. */ |
| 307 | return HURD_FD_USE (which, (_hurd_port2fd (descriptor, port, 0), 0)); |
| 308 | } |
| 309 | |
| 310 | /* Snarfing and frobbing environment variables. */ |
| 311 | |
| 312 | kern_return_t |
| 313 | _S_msg_get_env_variable (mach_port_t msgport, |
| 314 | char *variable, |
| 315 | char **data, mach_msg_type_number_t *datalen) |
| 316 | { |
| 317 | error_t err; |
| 318 | mach_msg_type_number_t valuelen; |
| 319 | const char *value = getenv (variable); |
| 320 | |
| 321 | if (value == NULL) |
| 322 | return ENOENT; |
| 323 | |
| 324 | valuelen = strlen (value); |
| 325 | if (valuelen > *datalen) |
| 326 | { |
| 327 | if (err = __vm_allocate (__mach_task_self (), |
| 328 | (vm_address_t *) data, valuelen, 1)) |
| 329 | return err; |
| 330 | } |
| 331 | |
| 332 | memcpy (*data, value, valuelen); |
| 333 | *datalen = valuelen; |
| 334 | |
| 335 | return 0; |
| 336 | } |
| 337 | |
| 338 | |
| 339 | kern_return_t |
| 340 | _S_msg_set_env_variable (mach_port_t msgport, mach_port_t auth, |
| 341 | char *variable, |
| 342 | char *value, |
| 343 | int replace) |
| 344 | { |
| 345 | AUTHCHECK; |
| 346 | |
| 347 | if (setenv (variable, value, replace)) /* XXX name space */ |
| 348 | return errno; |
| 349 | return 0; |
| 350 | } |
| 351 | |
| 352 | kern_return_t |
| 353 | _S_msg_get_environment (mach_port_t msgport, |
| 354 | char **data, mach_msg_type_number_t *datalen) |
| 355 | { |
| 356 | /* Pack the environment into an array with nulls separating elements. */ |
| 357 | if (__environ != NULL) |
| 358 | { |
| 359 | char *ap, **p; |
| 360 | size_t envlen = 0; |
| 361 | |
| 362 | for (p = __environ; *p != NULL; ++p) |
| 363 | envlen += strlen (*p) + 1; |
| 364 | |
| 365 | if (envlen > *datalen) |
| 366 | { |
| 367 | if (__vm_allocate (__mach_task_self (), |
| 368 | (vm_address_t *) data, envlen, 1)) |
| 369 | return ENOMEM; |
| 370 | } |
| 371 | |
| 372 | ap = *data; |
| 373 | for (p = __environ; *p != NULL; ++p) |
| 374 | ap = __memccpy (ap, *p, '\0', ULONG_MAX); |
| 375 | |
| 376 | *datalen = envlen; |
| 377 | } |
| 378 | else |
| 379 | *datalen = 0; |
| 380 | |
| 381 | return 0; |
| 382 | } |
| 383 | |
| 384 | kern_return_t |
| 385 | _S_msg_set_environment (mach_port_t msgport, mach_port_t auth, |
| 386 | char *data, mach_msg_type_number_t datalen) |
| 387 | { |
| 388 | int _hurd_split_args (char *, mach_msg_type_number_t, char **); |
| 389 | int envc; |
| 390 | char **envp; |
| 391 | |
| 392 | AUTHCHECK; |
| 393 | |
| 394 | envc = __argz_count (data, datalen); |
| 395 | envp = malloc ((envc + 1) * sizeof (char *)); |
| 396 | if (envp == NULL) |
| 397 | return errno; |
| 398 | __argz_extract (data, datalen, envp); |
| 399 | __environ = envp; /* XXX cooperate with loadenv et al */ |
| 400 | return 0; |
| 401 | } |
| 402 | |
| 403 | |
| 404 | /* XXX */ |
| 405 | |
| 406 | kern_return_t |
| 407 | _S_msg_get_dtable (mach_port_t process, |
| 408 | mach_port_t refport, |
| 409 | portarray_t *dtable, |
| 410 | mach_msg_type_name_t *dtablePoly, |
| 411 | mach_msg_type_number_t *dtableCnt) |
| 412 | { return EOPNOTSUPP; } |
| 413 | |
| 414 | kern_return_t |
| 415 | _S_msg_set_dtable (mach_port_t process, |
| 416 | mach_port_t refport, |
| 417 | portarray_t dtable, |
| 418 | mach_msg_type_number_t dtableCnt) |
| 419 | { return EOPNOTSUPP; } |