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| 1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ | |
| 2 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 3 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 5 | |
| 6 /* | |
| 7 ** uxshm.c -- Unix Implementations NSPR Named Shared Memory | |
| 8 ** | |
| 9 ** | |
| 10 ** lth. Jul-1999. | |
| 11 ** | |
| 12 */ | |
| 13 #include <string.h> | |
| 14 #include <prshm.h> | |
| 15 #include <prerr.h> | |
| 16 #include <prmem.h> | |
| 17 #include "primpl.h" | |
| 18 #include <fcntl.h> | |
| 19 | |
| 20 extern PRLogModuleInfo *_pr_shm_lm; | |
| 21 | |
| 22 | |
| 23 #define NSPR_IPC_SHM_KEY 'b' | |
| 24 /* | |
| 25 ** Implementation for System V | |
| 26 */ | |
| 27 #if defined PR_HAVE_SYSV_NAMED_SHARED_MEMORY | |
| 28 #include <sys/ipc.h> | |
| 29 #include <sys/shm.h> | |
| 30 #include <sys/types.h> | |
| 31 #include <sys/stat.h> | |
| 32 | |
| 33 #define _MD_OPEN_SHARED_MEMORY _MD_OpenSharedMemory | |
| 34 #define _MD_ATTACH_SHARED_MEMORY _MD_AttachSharedMemory | |
| 35 #define _MD_DETACH_SHARED_MEMORY _MD_DetachSharedMemory | |
| 36 #define _MD_CLOSE_SHARED_MEMORY _MD_CloseSharedMemory | |
| 37 #define _MD_DELETE_SHARED_MEMORY _MD_DeleteSharedMemory | |
| 38 | |
| 39 extern PRSharedMemory * _MD_OpenSharedMemory( | |
| 40 const char *name, | |
| 41 PRSize size, | |
| 42 PRIntn flags, | |
| 43 PRIntn mode | |
| 44 ) | |
| 45 { | |
| 46 PRStatus rc = PR_SUCCESS; | |
| 47 key_t key; | |
| 48 PRSharedMemory *shm; | |
| 49 char ipcname[PR_IPC_NAME_SIZE]; | |
| 50 | |
| 51 rc = _PR_MakeNativeIPCName( name, ipcname, PR_IPC_NAME_SIZE, _PRIPCShm ); | |
| 52 if ( PR_FAILURE == rc ) | |
| 53 { | |
| 54 _PR_MD_MAP_DEFAULT_ERROR( errno ); | |
| 55 PR_LOG( _pr_shm_lm, PR_LOG_DEBUG, | |
| 56 ("_MD_OpenSharedMemory(): _PR_MakeNativeIPCName() failed: %s", name
)); | |
| 57 return( NULL ); | |
| 58 } | |
| 59 | |
| 60 shm = PR_NEWZAP( PRSharedMemory ); | |
| 61 if ( NULL == shm ) | |
| 62 { | |
| 63 PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0 ); | |
| 64 PR_LOG(_pr_shm_lm, PR_LOG_DEBUG, ( "PR_OpenSharedMemory: New PRSharedMem
ory out of memory")); | |
| 65 return( NULL ); | |
| 66 } | |
| 67 | |
| 68 shm->ipcname = (char*)PR_MALLOC( strlen( ipcname ) + 1 ); | |
| 69 if ( NULL == shm->ipcname ) | |
| 70 { | |
| 71 PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0 ); | |
| 72 PR_LOG(_pr_shm_lm, PR_LOG_DEBUG, ( "PR_OpenSharedMemory: New shm->ipcnam
e out of memory")); | |
| 73 PR_DELETE( shm ); | |
| 74 return( NULL ); | |
| 75 } | |
| 76 | |
| 77 /* copy args to struct */ | |
| 78 strcpy( shm->ipcname, ipcname ); | |
| 79 shm->size = size; | |
| 80 shm->mode = mode; | |
| 81 shm->flags = flags; | |
| 82 shm->ident = _PR_SHM_IDENT; | |
| 83 | |
| 84 /* create the file first */ | |
| 85 if ( flags & PR_SHM_CREATE ) { | |
| 86 int osfd = open( shm->ipcname, (O_RDWR | O_CREAT), shm->mode ); | |
| 87 if ( -1 == osfd ) { | |
| 88 _PR_MD_MAP_OPEN_ERROR( errno ); | |
| 89 PR_FREEIF( shm->ipcname ); | |
| 90 PR_DELETE( shm ); | |
| 91 return( NULL ); | |
| 92 } | |
| 93 if ( close(osfd) == -1 ) { | |
| 94 _PR_MD_MAP_CLOSE_ERROR( errno ); | |
| 95 PR_FREEIF( shm->ipcname ); | |
| 96 PR_DELETE( shm ); | |
| 97 return( NULL ); | |
| 98 } | |
| 99 } | |
| 100 | |
| 101 /* hash the shm.name to an ID */ | |
| 102 key = ftok( shm->ipcname, NSPR_IPC_SHM_KEY ); | |
| 103 if ( -1 == key ) | |
| 104 { | |
| 105 rc = PR_FAILURE; | |
| 106 _PR_MD_MAP_DEFAULT_ERROR( errno ); | |
| 107 PR_LOG( _pr_shm_lm, PR_LOG_DEBUG, | |
| 108 ("_MD_OpenSharedMemory(): ftok() failed on name: %s", shm->ipcname))
; | |
| 109 PR_FREEIF( shm->ipcname ); | |
| 110 PR_DELETE( shm ); | |
| 111 return( NULL ); | |
| 112 } | |
| 113 | |
| 114 /* get the shared memory */ | |
| 115 if ( flags & PR_SHM_CREATE ) { | |
| 116 shm->id = shmget( key, shm->size, ( shm->mode | IPC_CREAT|IPC_EXCL)); | |
| 117 if ( shm->id >= 0 ) { | |
| 118 return( shm ); | |
| 119 } | |
| 120 if ((errno == EEXIST) && (flags & PR_SHM_EXCL)) { | |
| 121 PR_SetError( PR_FILE_EXISTS_ERROR, errno ); | |
| 122 PR_LOG( _pr_shm_lm, PR_LOG_DEBUG, | |
| 123 ("_MD_OpenSharedMemory(): shmget() exclusive failed, errno: %d",
errno)); | |
| 124 PR_FREEIF(shm->ipcname); | |
| 125 PR_DELETE(shm); | |
| 126 return(NULL); | |
| 127 } | |
| 128 } | |
| 129 | |
| 130 shm->id = shmget( key, shm->size, shm->mode ); | |
| 131 if ( -1 == shm->id ) { | |
| 132 _PR_MD_MAP_DEFAULT_ERROR( errno ); | |
| 133 PR_LOG( _pr_shm_lm, PR_LOG_DEBUG, | |
| 134 ("_MD_OpenSharedMemory(): shmget() failed, errno: %d", errno)); | |
| 135 PR_FREEIF(shm->ipcname); | |
| 136 PR_DELETE(shm); | |
| 137 return(NULL); | |
| 138 } | |
| 139 | |
| 140 return( shm ); | |
| 141 } /* end _MD_OpenSharedMemory() */ | |
| 142 | |
| 143 extern void * _MD_AttachSharedMemory( PRSharedMemory *shm, PRIntn flags ) | |
| 144 { | |
| 145 void *addr; | |
| 146 PRUint32 aFlags = shm->mode; | |
| 147 | |
| 148 PR_ASSERT( shm->ident == _PR_SHM_IDENT ); | |
| 149 | |
| 150 aFlags |= (flags & PR_SHM_READONLY )? SHM_RDONLY : 0; | |
| 151 | |
| 152 addr = shmat( shm->id, NULL, aFlags ); | |
| 153 if ( (void*)-1 == addr ) | |
| 154 { | |
| 155 _PR_MD_MAP_DEFAULT_ERROR( errno ); | |
| 156 PR_LOG( _pr_shm_lm, PR_LOG_DEBUG, | |
| 157 ("_MD_AttachSharedMemory(): shmat() failed on name: %s, OsError: %d"
, | |
| 158 shm->ipcname, PR_GetOSError() )); | |
| 159 addr = NULL; | |
| 160 } | |
| 161 | |
| 162 return addr; | |
| 163 } | |
| 164 | |
| 165 extern PRStatus _MD_DetachSharedMemory( PRSharedMemory *shm, void *addr ) | |
| 166 { | |
| 167 PRStatus rc = PR_SUCCESS; | |
| 168 PRIntn urc; | |
| 169 | |
| 170 PR_ASSERT( shm->ident == _PR_SHM_IDENT ); | |
| 171 | |
| 172 urc = shmdt( addr ); | |
| 173 if ( -1 == urc ) | |
| 174 { | |
| 175 rc = PR_FAILURE; | |
| 176 _PR_MD_MAP_DEFAULT_ERROR( errno ); | |
| 177 PR_LOG( _pr_shm_lm, PR_LOG_DEBUG, | |
| 178 ("_MD_DetachSharedMemory(): shmdt() failed on name: %s", shm->ipcnam
e )); | |
| 179 } | |
| 180 | |
| 181 return rc; | |
| 182 } | |
| 183 | |
| 184 extern PRStatus _MD_CloseSharedMemory( PRSharedMemory *shm ) | |
| 185 { | |
| 186 PR_ASSERT( shm->ident == _PR_SHM_IDENT ); | |
| 187 | |
| 188 PR_FREEIF(shm->ipcname); | |
| 189 PR_DELETE(shm); | |
| 190 | |
| 191 return PR_SUCCESS; | |
| 192 } | |
| 193 | |
| 194 extern PRStatus _MD_DeleteSharedMemory( const char *name ) | |
| 195 { | |
| 196 PRStatus rc = PR_SUCCESS; | |
| 197 key_t key; | |
| 198 int id; | |
| 199 PRIntn urc; | |
| 200 char ipcname[PR_IPC_NAME_SIZE]; | |
| 201 | |
| 202 rc = _PR_MakeNativeIPCName( name, ipcname, PR_IPC_NAME_SIZE, _PRIPCShm ); | |
| 203 if ( PR_FAILURE == rc ) | |
| 204 { | |
| 205 PR_SetError( PR_UNKNOWN_ERROR , errno ); | |
| 206 PR_LOG( _pr_shm_lm, PR_LOG_DEBUG, | |
| 207 ("_MD_DeleteSharedMemory(): _PR_MakeNativeIPCName() failed: %s", nam
e )); | |
| 208 return(PR_FAILURE); | |
| 209 } | |
| 210 | |
| 211 /* create the file first */ | |
| 212 { | |
| 213 int osfd = open( ipcname, (O_RDWR | O_CREAT), 0666 ); | |
| 214 if ( -1 == osfd ) { | |
| 215 _PR_MD_MAP_OPEN_ERROR( errno ); | |
| 216 return( PR_FAILURE ); | |
| 217 } | |
| 218 if ( close(osfd) == -1 ) { | |
| 219 _PR_MD_MAP_CLOSE_ERROR( errno ); | |
| 220 return( PR_FAILURE ); | |
| 221 } | |
| 222 } | |
| 223 | |
| 224 /* hash the shm.name to an ID */ | |
| 225 key = ftok( ipcname, NSPR_IPC_SHM_KEY ); | |
| 226 if ( -1 == key ) | |
| 227 { | |
| 228 rc = PR_FAILURE; | |
| 229 _PR_MD_MAP_DEFAULT_ERROR( errno ); | |
| 230 PR_LOG( _pr_shm_lm, PR_LOG_DEBUG, | |
| 231 ("_MD_DeleteSharedMemory(): ftok() failed on name: %s", ipcname)); | |
| 232 } | |
| 233 | |
| 234 #ifdef SYMBIAN | |
| 235 /* In Symbian OS the system imposed minimum is 1 byte, instead of ZERO */ | |
| 236 id = shmget( key, 1, 0 ); | |
| 237 #else | |
| 238 id = shmget( key, 0, 0 ); | |
| 239 #endif | |
| 240 if ( -1 == id ) { | |
| 241 _PR_MD_MAP_DEFAULT_ERROR( errno ); | |
| 242 PR_LOG( _pr_shm_lm, PR_LOG_DEBUG, | |
| 243 ("_MD_DeleteSharedMemory(): shmget() failed, errno: %d", errno)); | |
| 244 return(PR_FAILURE); | |
| 245 } | |
| 246 | |
| 247 urc = shmctl( id, IPC_RMID, NULL ); | |
| 248 if ( -1 == urc ) | |
| 249 { | |
| 250 _PR_MD_MAP_DEFAULT_ERROR( errno ); | |
| 251 PR_LOG( _pr_shm_lm, PR_LOG_DEBUG, | |
| 252 ("_MD_DeleteSharedMemory(): shmctl() failed on name: %s", ipcname ))
; | |
| 253 return(PR_FAILURE); | |
| 254 } | |
| 255 | |
| 256 urc = unlink( ipcname ); | |
| 257 if ( -1 == urc ) { | |
| 258 _PR_MD_MAP_UNLINK_ERROR( errno ); | |
| 259 PR_LOG( _pr_shm_lm, PR_LOG_DEBUG, | |
| 260 ("_MD_DeleteSharedMemory(): unlink() failed: %s", ipcname )); | |
| 261 return(PR_FAILURE); | |
| 262 } | |
| 263 | |
| 264 return rc; | |
| 265 } /* end _MD_DeleteSharedMemory() */ | |
| 266 | |
| 267 /* | |
| 268 ** Implementation for Posix | |
| 269 */ | |
| 270 #elif defined PR_HAVE_POSIX_NAMED_SHARED_MEMORY | |
| 271 #include <sys/mman.h> | |
| 272 | |
| 273 #define _MD_OPEN_SHARED_MEMORY _MD_OpenSharedMemory | |
| 274 #define _MD_ATTACH_SHARED_MEMORY _MD_AttachSharedMemory | |
| 275 #define _MD_DETACH_SHARED_MEMORY _MD_DetachSharedMemory | |
| 276 #define _MD_CLOSE_SHARED_MEMORY _MD_CloseSharedMemory | |
| 277 #define _MD_DELETE_SHARED_MEMORY _MD_DeleteSharedMemory | |
| 278 | |
| 279 struct _MDSharedMemory { | |
| 280 int handle; | |
| 281 }; | |
| 282 | |
| 283 extern PRSharedMemory * _MD_OpenSharedMemory( | |
| 284 const char *name, | |
| 285 PRSize size, | |
| 286 PRIntn flags, | |
| 287 PRIntn mode | |
| 288 ) | |
| 289 { | |
| 290 PRStatus rc = PR_SUCCESS; | |
| 291 PRInt32 end; | |
| 292 PRSharedMemory *shm; | |
| 293 char ipcname[PR_IPC_NAME_SIZE]; | |
| 294 | |
| 295 rc = _PR_MakeNativeIPCName( name, ipcname, PR_IPC_NAME_SIZE, _PRIPCShm ); | |
| 296 if ( PR_FAILURE == rc ) | |
| 297 { | |
| 298 PR_SetError( PR_UNKNOWN_ERROR , errno ); | |
| 299 PR_LOG( _pr_shm_lm, PR_LOG_DEBUG, | |
| 300 ("_MD_OpenSharedMemory(): _PR_MakeNativeIPCName() failed: %s", name
)); | |
| 301 return( NULL ); | |
| 302 } | |
| 303 | |
| 304 shm = PR_NEWZAP( PRSharedMemory ); | |
| 305 if ( NULL == shm ) | |
| 306 { | |
| 307 PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0 ); | |
| 308 PR_LOG(_pr_shm_lm, PR_LOG_DEBUG, ( "PR_OpenSharedMemory: New PRSharedMem
ory out of memory")); | |
| 309 return( NULL ); | |
| 310 } | |
| 311 | |
| 312 shm->ipcname = PR_MALLOC( strlen( ipcname ) + 1 ); | |
| 313 if ( NULL == shm->ipcname ) | |
| 314 { | |
| 315 PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0 ); | |
| 316 PR_LOG(_pr_shm_lm, PR_LOG_DEBUG, ( "PR_OpenSharedMemory: New shm->ipcnam
e out of memory")); | |
| 317 return( NULL ); | |
| 318 } | |
| 319 | |
| 320 /* copy args to struct */ | |
| 321 strcpy( shm->ipcname, ipcname ); | |
| 322 shm->size = size; | |
| 323 shm->mode = mode; | |
| 324 shm->flags = flags; | |
| 325 shm->ident = _PR_SHM_IDENT; | |
| 326 | |
| 327 /* | |
| 328 ** Create the shared memory | |
| 329 */ | |
| 330 if ( flags & PR_SHM_CREATE ) { | |
| 331 int oflag = (O_CREAT | O_RDWR); | |
| 332 | |
| 333 if ( flags & PR_SHM_EXCL ) | |
| 334 oflag |= O_EXCL; | |
| 335 shm->id = shm_open( shm->ipcname, oflag, shm->mode ); | |
| 336 } else { | |
| 337 shm->id = shm_open( shm->ipcname, O_RDWR, shm->mode ); | |
| 338 } | |
| 339 | |
| 340 if ( -1 == shm->id ) { | |
| 341 _PR_MD_MAP_DEFAULT_ERROR( errno ); | |
| 342 PR_LOG(_pr_shm_lm, PR_LOG_DEBUG, | |
| 343 ("_MD_OpenSharedMemory(): shm_open failed: %s, OSError: %d", | |
| 344 shm->ipcname, PR_GetOSError())); | |
| 345 PR_DELETE( shm->ipcname ); | |
| 346 PR_DELETE( shm ); | |
| 347 return(NULL); | |
| 348 } | |
| 349 | |
| 350 end = ftruncate( shm->id, shm->size ); | |
| 351 if ( -1 == end ) { | |
| 352 _PR_MD_MAP_DEFAULT_ERROR( errno ); | |
| 353 PR_LOG(_pr_shm_lm, PR_LOG_DEBUG, | |
| 354 ("_MD_OpenSharedMemory(): ftruncate failed, OSError: %d", | |
| 355 PR_GetOSError())); | |
| 356 PR_DELETE( shm->ipcname ); | |
| 357 PR_DELETE( shm ); | |
| 358 return(NULL); | |
| 359 } | |
| 360 | |
| 361 return(shm); | |
| 362 } /* end _MD_OpenSharedMemory() */ | |
| 363 | |
| 364 extern void * _MD_AttachSharedMemory( PRSharedMemory *shm, PRIntn flags ) | |
| 365 { | |
| 366 void *addr; | |
| 367 PRIntn prot = (PROT_READ | PROT_WRITE); | |
| 368 | |
| 369 PR_ASSERT( shm->ident == _PR_SHM_IDENT ); | |
| 370 | |
| 371 if ( PR_SHM_READONLY == flags) | |
| 372 prot ^= PROT_WRITE; | |
| 373 | |
| 374 addr = mmap( (void*)0, shm->size, prot, MAP_SHARED, shm->id, 0 ); | |
| 375 if ((void*)-1 == addr ) | |
| 376 { | |
| 377 _PR_MD_MAP_DEFAULT_ERROR( errno ); | |
| 378 PR_LOG( _pr_shm_lm, PR_LOG_DEBUG, | |
| 379 ("_MD_AttachSharedMemory(): mmap failed: %s, errno: %d", | |
| 380 shm->ipcname, PR_GetOSError())); | |
| 381 addr = NULL; | |
| 382 } else { | |
| 383 PR_LOG( _pr_shm_lm, PR_LOG_DEBUG, | |
| 384 ("_MD_AttachSharedMemory(): name: %s, attached at: %p", shm->ipcname
, addr)); | |
| 385 } | |
| 386 | |
| 387 return addr; | |
| 388 } | |
| 389 | |
| 390 extern PRStatus _MD_DetachSharedMemory( PRSharedMemory *shm, void *addr ) | |
| 391 { | |
| 392 PRStatus rc = PR_SUCCESS; | |
| 393 PRIntn urc; | |
| 394 | |
| 395 PR_ASSERT( shm->ident == _PR_SHM_IDENT ); | |
| 396 | |
| 397 urc = munmap( addr, shm->size ); | |
| 398 if ( -1 == urc ) | |
| 399 { | |
| 400 rc = PR_FAILURE; | |
| 401 _PR_MD_MAP_DEFAULT_ERROR( errno ); | |
| 402 PR_LOG( _pr_shm_lm, PR_LOG_DEBUG, | |
| 403 ("_MD_DetachSharedMemory(): munmap failed: %s, errno: %d", | |
| 404 shm->ipcname, PR_GetOSError())); | |
| 405 } | |
| 406 return rc; | |
| 407 } | |
| 408 | |
| 409 extern PRStatus _MD_CloseSharedMemory( PRSharedMemory *shm ) | |
| 410 { | |
| 411 int urc; | |
| 412 | |
| 413 PR_ASSERT( shm->ident == _PR_SHM_IDENT ); | |
| 414 | |
| 415 urc = close( shm->id ); | |
| 416 if ( -1 == urc ) { | |
| 417 _PR_MD_MAP_CLOSE_ERROR( errno ); | |
| 418 PR_LOG( _pr_shm_lm, PR_LOG_DEBUG, | |
| 419 ("_MD_CloseSharedMemory(): close() failed, error: %d", PR_GetOSError
())); | |
| 420 return(PR_FAILURE); | |
| 421 } | |
| 422 PR_DELETE( shm->ipcname ); | |
| 423 PR_DELETE( shm ); | |
| 424 return PR_SUCCESS; | |
| 425 } | |
| 426 | |
| 427 extern PRStatus _MD_DeleteSharedMemory( const char *name ) | |
| 428 { | |
| 429 PRStatus rc = PR_SUCCESS; | |
| 430 PRUintn urc; | |
| 431 char ipcname[PR_IPC_NAME_SIZE]; | |
| 432 | |
| 433 rc = _PR_MakeNativeIPCName( name, ipcname, PR_IPC_NAME_SIZE, _PRIPCShm ); | |
| 434 if ( PR_FAILURE == rc ) | |
| 435 { | |
| 436 PR_SetError( PR_UNKNOWN_ERROR , errno ); | |
| 437 PR_LOG( _pr_shm_lm, PR_LOG_DEBUG, | |
| 438 ("_MD_OpenSharedMemory(): _PR_MakeNativeIPCName() failed: %s", name
)); | |
| 439 return rc; | |
| 440 } | |
| 441 | |
| 442 urc = shm_unlink( ipcname ); | |
| 443 if ( -1 == urc ) { | |
| 444 rc = PR_FAILURE; | |
| 445 _PR_MD_MAP_DEFAULT_ERROR( errno ); | |
| 446 PR_LOG( _pr_shm_lm, PR_LOG_DEBUG, | |
| 447 ("_MD_DeleteSharedMemory(): shm_unlink failed: %s, errno: %d", | |
| 448 ipcname, PR_GetOSError())); | |
| 449 } else { | |
| 450 PR_LOG( _pr_shm_lm, PR_LOG_DEBUG, | |
| 451 ("_MD_DeleteSharedMemory(): %s, success", ipcname)); | |
| 452 } | |
| 453 | |
| 454 return rc; | |
| 455 } /* end _MD_DeleteSharedMemory() */ | |
| 456 #endif | |
| 457 | |
| 458 | |
| 459 | |
| 460 /* | |
| 461 ** Unix implementation for anonymous memory (file) mapping | |
| 462 */ | |
| 463 extern PRLogModuleInfo *_pr_shma_lm; | |
| 464 | |
| 465 #include <unistd.h> | |
| 466 | |
| 467 extern PRFileMap* _md_OpenAnonFileMap( | |
| 468 const char *dirName, | |
| 469 PRSize size, | |
| 470 PRFileMapProtect prot | |
| 471 ) | |
| 472 { | |
| 473 PRFileMap *fm = NULL; | |
| 474 PRFileDesc *fd; | |
| 475 int osfd; | |
| 476 PRIntn urc; | |
| 477 PRIntn mode = 0600; | |
| 478 char *genName; | |
| 479 pid_t pid = getpid(); /* for generating filename */ | |
| 480 PRThread *tid = PR_GetCurrentThread(); /* for generating filename */ | |
| 481 int incr; /* for generating filename */ | |
| 482 const int maxTries = 20; /* maximum # attempts at a unique filename */ | |
| 483 PRInt64 size64; /* 64-bit version of 'size' */ | |
| 484 | |
| 485 /* | |
| 486 ** generate a filename from input and runtime environment | |
| 487 ** open the file, unlink the file. | |
| 488 ** make maxTries number of attempts at uniqueness in the filename | |
| 489 */ | |
| 490 for ( incr = 0; incr < maxTries ; incr++ ) { | |
| 491 #if defined(SYMBIAN) | |
| 492 #define NSPR_AFM_FILENAME "%s\\NSPR-AFM-%d-%p.%d" | |
| 493 #else | |
| 494 #define NSPR_AFM_FILENAME "%s/.NSPR-AFM-%d-%p.%d" | |
| 495 #endif | |
| 496 genName = PR_smprintf( NSPR_AFM_FILENAME, | |
| 497 dirName, (int) pid, tid, incr ); | |
| 498 if ( NULL == genName ) { | |
| 499 PR_LOG( _pr_shma_lm, PR_LOG_DEBUG, | |
| 500 ("_md_OpenAnonFileMap(): PR_snprintf(): failed, generating filen
ame")); | |
| 501 goto Finished; | |
| 502 } | |
| 503 | |
| 504 /* create the file */ | |
| 505 osfd = open( genName, (O_CREAT | O_EXCL | O_RDWR), mode ); | |
| 506 if ( -1 == osfd ) { | |
| 507 if ( EEXIST == errno ) { | |
| 508 PR_smprintf_free( genName ); | |
| 509 continue; /* name exists, try again */ | |
| 510 } else { | |
| 511 _PR_MD_MAP_OPEN_ERROR( errno ); | |
| 512 PR_LOG( _pr_shma_lm, PR_LOG_DEBUG, | |
| 513 ("_md_OpenAnonFileMap(): open(): failed, filename: %s, errno
: %d", | |
| 514 genName, PR_GetOSError())); | |
| 515 PR_smprintf_free( genName ); | |
| 516 goto Finished; | |
| 517 } | |
| 518 } | |
| 519 break; /* name generation and open successful, break; */ | |
| 520 } /* end for() */ | |
| 521 | |
| 522 if ( incr == maxTries ) { | |
| 523 PR_ASSERT( -1 == osfd ); | |
| 524 PR_ASSERT( EEXIST == errno ); | |
| 525 _PR_MD_MAP_OPEN_ERROR( errno ); | |
| 526 goto Finished; | |
| 527 } | |
| 528 | |
| 529 urc = unlink( genName ); | |
| 530 #if defined(SYMBIAN) && defined(__WINS__) | |
| 531 /* If it is being used by the system or another process, Symbian OS | |
| 532 * Emulator(WINS) considers this an error. */ | |
| 533 if ( -1 == urc && EACCES != errno ) { | |
| 534 #else | |
| 535 if ( -1 == urc ) { | |
| 536 #endif | |
| 537 _PR_MD_MAP_UNLINK_ERROR( errno ); | |
| 538 PR_LOG( _pr_shma_lm, PR_LOG_DEBUG, | |
| 539 ("_md_OpenAnonFileMap(): failed on unlink(), errno: %d", errno)); | |
| 540 PR_smprintf_free( genName ); | |
| 541 close( osfd ); | |
| 542 goto Finished; | |
| 543 } | |
| 544 PR_LOG( _pr_shma_lm, PR_LOG_DEBUG, | |
| 545 ("_md_OpenAnonFileMap(): unlink(): %s", genName )); | |
| 546 | |
| 547 PR_smprintf_free( genName ); | |
| 548 | |
| 549 fd = PR_ImportFile( osfd ); | |
| 550 if ( NULL == fd ) { | |
| 551 PR_LOG( _pr_shma_lm, PR_LOG_DEBUG, | |
| 552 ("_md_OpenAnonFileMap(): PR_ImportFile(): failed")); | |
| 553 goto Finished; | |
| 554 } | |
| 555 PR_LOG( _pr_shma_lm, PR_LOG_DEBUG, | |
| 556 ("_md_OpenAnonFileMap(): fd: %p", fd )); | |
| 557 | |
| 558 urc = ftruncate( fd->secret->md.osfd, size ); | |
| 559 if ( -1 == urc ) { | |
| 560 _PR_MD_MAP_DEFAULT_ERROR( errno ); | |
| 561 PR_LOG( _pr_shma_lm, PR_LOG_DEBUG, | |
| 562 ("_md_OpenAnonFileMap(): failed on ftruncate(), errno: %d", errno)); | |
| 563 PR_Close( fd ); | |
| 564 goto Finished; | |
| 565 } | |
| 566 PR_LOG( _pr_shma_lm, PR_LOG_DEBUG, | |
| 567 ("_md_OpenAnonFileMap(): ftruncate(): size: %d", size )); | |
| 568 | |
| 569 LL_UI2L(size64, size); /* PRSize (size_t) is unsigned */ | |
| 570 fm = PR_CreateFileMap( fd, size64, prot ); | |
| 571 if ( NULL == fm ) { | |
| 572 PR_LOG( _pr_shma_lm, PR_LOG_DEBUG, | |
| 573 ("PR_OpenAnonFileMap(): failed")); | |
| 574 PR_Close( fd ); | |
| 575 goto Finished; | |
| 576 } | |
| 577 fm->md.isAnonFM = PR_TRUE; /* set fd close */ | |
| 578 | |
| 579 PR_LOG( _pr_shma_lm, PR_LOG_DEBUG, | |
| 580 ("_md_OpenAnonFileMap(): PR_CreateFileMap(): fm: %p", fm )); | |
| 581 | |
| 582 Finished: | |
| 583 return(fm); | |
| 584 } /* end md_OpenAnonFileMap() */ | |
| 585 | |
| 586 /* | |
| 587 ** _md_ExportFileMapAsString() | |
| 588 ** | |
| 589 ** | |
| 590 */ | |
| 591 extern PRStatus _md_ExportFileMapAsString( | |
| 592 PRFileMap *fm, | |
| 593 PRSize bufSize, | |
| 594 char *buf | |
| 595 ) | |
| 596 { | |
| 597 PRIntn written; | |
| 598 PRIntn prot = (PRIntn)fm->prot; | |
| 599 | |
| 600 written = PR_snprintf( buf, bufSize, "%ld:%d", | |
| 601 fm->fd->secret->md.osfd, prot ); | |
| 602 | |
| 603 return((written == -1)? PR_FAILURE : PR_SUCCESS); | |
| 604 } /* end _md_ExportFileMapAsString() */ | |
| 605 | |
| 606 | |
| 607 extern PRFileMap * _md_ImportFileMapFromString( | |
| 608 const char *fmstring | |
| 609 ) | |
| 610 { | |
| 611 PRStatus rc; | |
| 612 PRInt32 osfd; | |
| 613 PRIntn prot; /* really: a PRFileMapProtect */ | |
| 614 PRFileDesc *fd; | |
| 615 PRFileMap *fm = NULL; /* default return value */ | |
| 616 PRFileInfo64 info; | |
| 617 | |
| 618 PR_sscanf( fmstring, "%ld:%d", &osfd, &prot ); | |
| 619 | |
| 620 /* import the os file descriptor */ | |
| 621 fd = PR_ImportFile( osfd ); | |
| 622 if ( NULL == fd ) { | |
| 623 PR_LOG( _pr_shma_lm, PR_LOG_DEBUG, | |
| 624 ("_md_ImportFileMapFromString(): PR_ImportFile() failed")); | |
| 625 goto Finished; | |
| 626 } | |
| 627 | |
| 628 rc = PR_GetOpenFileInfo64( fd, &info ); | |
| 629 if ( PR_FAILURE == rc ) { | |
| 630 PR_LOG( _pr_shma_lm, PR_LOG_DEBUG, | |
| 631 ("_md_ImportFileMapFromString(): PR_GetOpenFileInfo64() failed"));
| |
| 632 goto Finished; | |
| 633 } | |
| 634 | |
| 635 fm = PR_CreateFileMap( fd, info.size, (PRFileMapProtect)prot ); | |
| 636 if ( NULL == fm ) { | |
| 637 PR_LOG( _pr_shma_lm, PR_LOG_DEBUG, | |
| 638 ("_md_ImportFileMapFromString(): PR_CreateFileMap() failed")); | |
| 639 } | |
| 640 | |
| 641 Finished: | |
| 642 return(fm); | |
| 643 } /* end _md_ImportFileMapFromString() */ | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 2078763002:
Delete bundled copy of NSS and replace with README. (Closed)
Base URL: https://chromium.googlesource.com/chromium/deps/nss@master