nsprpub/pr/src/md/unix/uxshm.c@4ab42b5ab56c
nsprpub/pr/src/md/unix/uxshm.c
Wed, 31 Dec 2014 07:53:36 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 07:53:36 +0100
- branch
- TOR_BUG_3246
- changeset 5
- 4ab42b5ab56c
- permissions
- -rw-r--r--
Correct small whitespace inconsistency, lost while renaming variables.
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/. */
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>
20 extern PRLogModuleInfo *_pr_shm_lm;
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>
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
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];
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 }
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 PRSharedMemory out of memory"));
65 return( NULL );
66 }
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->ipcname out of memory"));
73 PR_DELETE( shm );
74 return( NULL );
75 }
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;
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 }
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 }
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 }
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 }
140 return( shm );
141 } /* end _MD_OpenSharedMemory() */
143 extern void * _MD_AttachSharedMemory( PRSharedMemory *shm, PRIntn flags )
144 {
145 void *addr;
146 PRUint32 aFlags = shm->mode;
148 PR_ASSERT( shm->ident == _PR_SHM_IDENT );
150 aFlags |= (flags & PR_SHM_READONLY )? SHM_RDONLY : 0;
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 }
162 return addr;
163 }
165 extern PRStatus _MD_DetachSharedMemory( PRSharedMemory *shm, void *addr )
166 {
167 PRStatus rc = PR_SUCCESS;
168 PRIntn urc;
170 PR_ASSERT( shm->ident == _PR_SHM_IDENT );
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->ipcname ));
179 }
181 return rc;
182 }
184 extern PRStatus _MD_CloseSharedMemory( PRSharedMemory *shm )
185 {
186 PR_ASSERT( shm->ident == _PR_SHM_IDENT );
188 PR_FREEIF(shm->ipcname);
189 PR_DELETE(shm);
191 return PR_SUCCESS;
192 }
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];
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", name ));
208 return(PR_FAILURE);
209 }
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 }
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 }
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 }
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 }
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 }
264 return rc;
265 } /* end _MD_DeleteSharedMemory() */
267 /*
268 ** Implementation for Posix
269 */
270 #elif defined PR_HAVE_POSIX_NAMED_SHARED_MEMORY
271 #include <sys/mman.h>
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
279 struct _MDSharedMemory {
280 int handle;
281 };
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];
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 }
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 PRSharedMemory out of memory"));
309 return( NULL );
310 }
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->ipcname out of memory"));
317 return( NULL );
318 }
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;
327 /*
328 ** Create the shared memory
329 */
330 if ( flags & PR_SHM_CREATE ) {
331 int oflag = (O_CREAT | O_RDWR);
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 }
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 }
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 }
361 return(shm);
362 } /* end _MD_OpenSharedMemory() */
364 extern void * _MD_AttachSharedMemory( PRSharedMemory *shm, PRIntn flags )
365 {
366 void *addr;
367 PRIntn prot = (PROT_READ | PROT_WRITE);
369 PR_ASSERT( shm->ident == _PR_SHM_IDENT );
371 if ( PR_SHM_READONLY == flags)
372 prot ^= PROT_WRITE;
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 }
387 return addr;
388 }
390 extern PRStatus _MD_DetachSharedMemory( PRSharedMemory *shm, void *addr )
391 {
392 PRStatus rc = PR_SUCCESS;
393 PRIntn urc;
395 PR_ASSERT( shm->ident == _PR_SHM_IDENT );
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 }
409 extern PRStatus _MD_CloseSharedMemory( PRSharedMemory *shm )
410 {
411 int urc;
413 PR_ASSERT( shm->ident == _PR_SHM_IDENT );
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 }
427 extern PRStatus _MD_DeleteSharedMemory( const char *name )
428 {
429 PRStatus rc = PR_SUCCESS;
430 PRUintn urc;
431 char ipcname[PR_IPC_NAME_SIZE];
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 }
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 }
454 return rc;
455 } /* end _MD_DeleteSharedMemory() */
456 #endif
460 /*
461 ** Unix implementation for anonymous memory (file) mapping
462 */
463 extern PRLogModuleInfo *_pr_shma_lm;
465 #include <unistd.h>
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' */
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 filename"));
501 goto Finished;
502 }
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() */
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 }
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 ));
547 PR_smprintf_free( genName );
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 ));
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 ));
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 */
579 PR_LOG( _pr_shma_lm, PR_LOG_DEBUG,
580 ("_md_OpenAnonFileMap(): PR_CreateFileMap(): fm: %p", fm ));
582 Finished:
583 return(fm);
584 } /* end md_OpenAnonFileMap() */
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;
600 written = PR_snprintf( buf, bufSize, "%ld:%d",
601 fm->fd->secret->md.osfd, prot );
603 return((written == -1)? PR_FAILURE : PR_SUCCESS);
604 } /* end _md_ExportFileMapAsString() */
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;
618 PR_sscanf( fmstring, "%ld:%d", &osfd, &prot );
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 }
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 }
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 }
641 Finished:
642 return(fm);
643 } /* end _md_ImportFileMapFromString() */
