| /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ |
| /* ***** BEGIN LICENSE BLOCK ***** |
| * Version: MPL 1.1/GPL 2.0/LGPL 2.1 |
| * |
| * The contents of this file are subject to the Mozilla Public License Version |
| * 1.1 (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * http://www.mozilla.org/MPL/ |
| * |
| * Software distributed under the License is distributed on an "AS IS" basis, |
| * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License |
| * for the specific language governing rights and limitations under the |
| * License. |
| * |
| * The Original Code is the Netscape Portable Runtime (NSPR). |
| * |
| * The Initial Developer of the Original Code is |
| * Netscape Communications Corporation. |
| * Portions created by the Initial Developer are Copyright (C) 1998-2000 |
| * the Initial Developer. All Rights Reserved. |
| * |
| * Contributor(s): |
| * |
| * Alternatively, the contents of this file may be used under the terms of |
| * either the GNU General Public License Version 2 or later (the "GPL"), or |
| * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), |
| * in which case the provisions of the GPL or the LGPL are applicable instead |
| * of those above. If you wish to allow use of your version of this file only |
| * under the terms of either the GPL or the LGPL, and not to allow others to |
| * use your version of this file under the terms of the MPL, indicate your |
| * decision by deleting the provisions above and replace them with the notice |
| * and other provisions required by the GPL or the LGPL. If you do not delete |
| * the provisions above, a recipient may use your version of this file under |
| * the terms of any one of the MPL, the GPL or the LGPL. |
| * |
| * ***** END LICENSE BLOCK ***** */ |
| |
| /* |
| ** uxshm.c -- Unix Implementations NSPR Named Shared Memory |
| ** |
| ** |
| ** lth. Jul-1999. |
| ** |
| */ |
| #include <string.h> |
| #include <prshm.h> |
| #include <prerr.h> |
| #include <prmem.h> |
| #include "primpl.h" |
| #include <fcntl.h> |
| |
| extern PRLogModuleInfo *_pr_shm_lm; |
| |
| |
| #define NSPR_IPC_SHM_KEY 'b' |
| /* |
| ** Implementation for System V |
| */ |
| #if defined PR_HAVE_SYSV_NAMED_SHARED_MEMORY |
| #include <sys/ipc.h> |
| #include <sys/shm.h> |
| #include <sys/types.h> |
| #include <sys/stat.h> |
| |
| #define _MD_OPEN_SHARED_MEMORY _MD_OpenSharedMemory |
| #define _MD_ATTACH_SHARED_MEMORY _MD_AttachSharedMemory |
| #define _MD_DETACH_SHARED_MEMORY _MD_DetachSharedMemory |
| #define _MD_CLOSE_SHARED_MEMORY _MD_CloseSharedMemory |
| #define _MD_DELETE_SHARED_MEMORY _MD_DeleteSharedMemory |
| |
| extern PRSharedMemory * _MD_OpenSharedMemory( |
| const char *name, |
| PRSize size, |
| PRIntn flags, |
| PRIntn mode |
| ) |
| { |
| PRStatus rc = PR_SUCCESS; |
| key_t key; |
| PRSharedMemory *shm; |
| char ipcname[PR_IPC_NAME_SIZE]; |
| |
| rc = _PR_MakeNativeIPCName( name, ipcname, PR_IPC_NAME_SIZE, _PRIPCShm ); |
| if ( PR_FAILURE == rc ) |
| { |
| _PR_MD_MAP_DEFAULT_ERROR( errno ); |
| PR_LOG( _pr_shm_lm, PR_LOG_DEBUG, |
| ("_MD_OpenSharedMemory(): _PR_MakeNativeIPCName() failed: %s", name )); |
| return( NULL ); |
| } |
| |
| shm = PR_NEWZAP( PRSharedMemory ); |
| if ( NULL == shm ) |
| { |
| PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0 ); |
| PR_LOG(_pr_shm_lm, PR_LOG_DEBUG, ( "PR_OpenSharedMemory: New PRSharedMemory out of memory")); |
| return( NULL ); |
| } |
| |
| shm->ipcname = (char*)PR_MALLOC( strlen( ipcname ) + 1 ); |
| if ( NULL == shm->ipcname ) |
| { |
| PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0 ); |
| PR_LOG(_pr_shm_lm, PR_LOG_DEBUG, ( "PR_OpenSharedMemory: New shm->ipcname out of memory")); |
| PR_DELETE( shm ); |
| return( NULL ); |
| } |
| |
| /* copy args to struct */ |
| strcpy( shm->ipcname, ipcname ); |
| shm->size = size; |
| shm->mode = mode; |
| shm->flags = flags; |
| shm->ident = _PR_SHM_IDENT; |
| |
| /* create the file first */ |
| if ( flags & PR_SHM_CREATE ) { |
| int osfd = open( shm->ipcname, (O_RDWR | O_CREAT), shm->mode ); |
| if ( -1 == osfd ) { |
| _PR_MD_MAP_OPEN_ERROR( errno ); |
| PR_FREEIF( shm->ipcname ); |
| PR_DELETE( shm ); |
| return( NULL ); |
| } |
| if ( close(osfd) == -1 ) { |
| _PR_MD_MAP_CLOSE_ERROR( errno ); |
| PR_FREEIF( shm->ipcname ); |
| PR_DELETE( shm ); |
| return( NULL ); |
| } |
| } |
| |
| /* hash the shm.name to an ID */ |
| key = ftok( shm->ipcname, NSPR_IPC_SHM_KEY ); |
| if ( -1 == key ) |
| { |
| rc = PR_FAILURE; |
| _PR_MD_MAP_DEFAULT_ERROR( errno ); |
| PR_LOG( _pr_shm_lm, PR_LOG_DEBUG, |
| ("_MD_OpenSharedMemory(): ftok() failed on name: %s", shm->ipcname)); |
| PR_FREEIF( shm->ipcname ); |
| PR_DELETE( shm ); |
| return( NULL ); |
| } |
| |
| /* get the shared memory */ |
| if ( flags & PR_SHM_CREATE ) { |
| shm->id = shmget( key, shm->size, ( shm->mode | IPC_CREAT|IPC_EXCL)); |
| if ( shm->id >= 0 ) { |
| return( shm ); |
| } |
| if ((errno == EEXIST) && (flags & PR_SHM_EXCL)) { |
| PR_SetError( PR_FILE_EXISTS_ERROR, errno ); |
| PR_LOG( _pr_shm_lm, PR_LOG_DEBUG, |
| ("_MD_OpenSharedMemory(): shmget() exclusive failed, errno: %d", errno)); |
| PR_FREEIF(shm->ipcname); |
| PR_DELETE(shm); |
| return(NULL); |
| } |
| } |
| |
| shm->id = shmget( key, shm->size, shm->mode ); |
| if ( -1 == shm->id ) { |
| _PR_MD_MAP_DEFAULT_ERROR( errno ); |
| PR_LOG( _pr_shm_lm, PR_LOG_DEBUG, |
| ("_MD_OpenSharedMemory(): shmget() failed, errno: %d", errno)); |
| PR_FREEIF(shm->ipcname); |
| PR_DELETE(shm); |
| return(NULL); |
| } |
| |
| return( shm ); |
| } /* end _MD_OpenSharedMemory() */ |
| |
| extern void * _MD_AttachSharedMemory( PRSharedMemory *shm, PRIntn flags ) |
| { |
| void *addr; |
| PRUint32 aFlags = shm->mode; |
| |
| PR_ASSERT( shm->ident == _PR_SHM_IDENT ); |
| |
| aFlags |= (flags & PR_SHM_READONLY )? SHM_RDONLY : 0; |
| |
| addr = shmat( shm->id, NULL, aFlags ); |
| if ( (void*)-1 == addr ) |
| { |
| _PR_MD_MAP_DEFAULT_ERROR( errno ); |
| PR_LOG( _pr_shm_lm, PR_LOG_DEBUG, |
| ("_MD_AttachSharedMemory(): shmat() failed on name: %s, OsError: %d", |
| shm->ipcname, PR_GetOSError() )); |
| addr = NULL; |
| } |
| |
| return addr; |
| } |
| |
| extern PRStatus _MD_DetachSharedMemory( PRSharedMemory *shm, void *addr ) |
| { |
| PRStatus rc = PR_SUCCESS; |
| PRIntn urc; |
| |
| PR_ASSERT( shm->ident == _PR_SHM_IDENT ); |
| |
| urc = shmdt( addr ); |
| if ( -1 == urc ) |
| { |
| rc = PR_FAILURE; |
| _PR_MD_MAP_DEFAULT_ERROR( errno ); |
| PR_LOG( _pr_shm_lm, PR_LOG_DEBUG, |
| ("_MD_DetachSharedMemory(): shmdt() failed on name: %s", shm->ipcname )); |
| } |
| |
| return rc; |
| } |
| |
| extern PRStatus _MD_CloseSharedMemory( PRSharedMemory *shm ) |
| { |
| PR_ASSERT( shm->ident == _PR_SHM_IDENT ); |
| |
| PR_FREEIF(shm->ipcname); |
| PR_DELETE(shm); |
| |
| return PR_SUCCESS; |
| } |
| |
| extern PRStatus _MD_DeleteSharedMemory( const char *name ) |
| { |
| PRStatus rc = PR_SUCCESS; |
| key_t key; |
| int id; |
| PRIntn urc; |
| char ipcname[PR_IPC_NAME_SIZE]; |
| |
| rc = _PR_MakeNativeIPCName( name, ipcname, PR_IPC_NAME_SIZE, _PRIPCShm ); |
| if ( PR_FAILURE == rc ) |
| { |
| PR_SetError( PR_UNKNOWN_ERROR , errno ); |
| PR_LOG( _pr_shm_lm, PR_LOG_DEBUG, |
| ("_MD_DeleteSharedMemory(): _PR_MakeNativeIPCName() failed: %s", name )); |
| return(PR_FAILURE); |
| } |
| |
| /* create the file first */ |
| { |
| int osfd = open( ipcname, (O_RDWR | O_CREAT), 0666 ); |
| if ( -1 == osfd ) { |
| _PR_MD_MAP_OPEN_ERROR( errno ); |
| return( PR_FAILURE ); |
| } |
| if ( close(osfd) == -1 ) { |
| _PR_MD_MAP_CLOSE_ERROR( errno ); |
| return( PR_FAILURE ); |
| } |
| } |
| |
| /* hash the shm.name to an ID */ |
| key = ftok( ipcname, NSPR_IPC_SHM_KEY ); |
| if ( -1 == key ) |
| { |
| rc = PR_FAILURE; |
| _PR_MD_MAP_DEFAULT_ERROR( errno ); |
| PR_LOG( _pr_shm_lm, PR_LOG_DEBUG, |
| ("_MD_DeleteSharedMemory(): ftok() failed on name: %s", ipcname)); |
| } |
| |
| #ifdef SYMBIAN |
| /* In Symbian OS the system imposed minimum is 1 byte, instead of ZERO */ |
| id = shmget( key, 1, 0 ); |
| #else |
| id = shmget( key, 0, 0 ); |
| #endif |
| if ( -1 == id ) { |
| _PR_MD_MAP_DEFAULT_ERROR( errno ); |
| PR_LOG( _pr_shm_lm, PR_LOG_DEBUG, |
| ("_MD_DeleteSharedMemory(): shmget() failed, errno: %d", errno)); |
| return(PR_FAILURE); |
| } |
| |
| urc = shmctl( id, IPC_RMID, NULL ); |
| if ( -1 == urc ) |
| { |
| _PR_MD_MAP_DEFAULT_ERROR( errno ); |
| PR_LOG( _pr_shm_lm, PR_LOG_DEBUG, |
| ("_MD_DeleteSharedMemory(): shmctl() failed on name: %s", ipcname )); |
| return(PR_FAILURE); |
| } |
| |
| urc = unlink( ipcname ); |
| if ( -1 == urc ) { |
| _PR_MD_MAP_UNLINK_ERROR( errno ); |
| PR_LOG( _pr_shm_lm, PR_LOG_DEBUG, |
| ("_MD_DeleteSharedMemory(): unlink() failed: %s", ipcname )); |
| return(PR_FAILURE); |
| } |
| |
| return rc; |
| } /* end _MD_DeleteSharedMemory() */ |
| |
| /* |
| ** Implementation for Posix |
| */ |
| #elif defined PR_HAVE_POSIX_NAMED_SHARED_MEMORY |
| #include <sys/mman.h> |
| |
| #define _MD_OPEN_SHARED_MEMORY _MD_OpenSharedMemory |
| #define _MD_ATTACH_SHARED_MEMORY _MD_AttachSharedMemory |
| #define _MD_DETACH_SHARED_MEMORY _MD_DetachSharedMemory |
| #define _MD_CLOSE_SHARED_MEMORY _MD_CloseSharedMemory |
| #define _MD_DELETE_SHARED_MEMORY _MD_DeleteSharedMemory |
| |
| struct _MDSharedMemory { |
| int handle; |
| }; |
| |
| extern PRSharedMemory * _MD_OpenSharedMemory( |
| const char *name, |
| PRSize size, |
| PRIntn flags, |
| PRIntn mode |
| ) |
| { |
| PRStatus rc = PR_SUCCESS; |
| PRInt32 end; |
| PRSharedMemory *shm; |
| char ipcname[PR_IPC_NAME_SIZE]; |
| |
| rc = _PR_MakeNativeIPCName( name, ipcname, PR_IPC_NAME_SIZE, _PRIPCShm ); |
| if ( PR_FAILURE == rc ) |
| { |
| PR_SetError( PR_UNKNOWN_ERROR , errno ); |
| PR_LOG( _pr_shm_lm, PR_LOG_DEBUG, |
| ("_MD_OpenSharedMemory(): _PR_MakeNativeIPCName() failed: %s", name )); |
| return( NULL ); |
| } |
| |
| shm = PR_NEWZAP( PRSharedMemory ); |
| if ( NULL == shm ) |
| { |
| PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0 ); |
| PR_LOG(_pr_shm_lm, PR_LOG_DEBUG, ( "PR_OpenSharedMemory: New PRSharedMemory out of memory")); |
| return( NULL ); |
| } |
| |
| shm->ipcname = PR_MALLOC( strlen( ipcname ) + 1 ); |
| if ( NULL == shm->ipcname ) |
| { |
| PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0 ); |
| PR_LOG(_pr_shm_lm, PR_LOG_DEBUG, ( "PR_OpenSharedMemory: New shm->ipcname out of memory")); |
| return( NULL ); |
| } |
| |
| /* copy args to struct */ |
| strcpy( shm->ipcname, ipcname ); |
| shm->size = size; |
| shm->mode = mode; |
| shm->flags = flags; |
| shm->ident = _PR_SHM_IDENT; |
| |
| /* |
| ** Create the shared memory |
| */ |
| if ( flags & PR_SHM_CREATE ) { |
| int oflag = (O_CREAT | O_RDWR); |
| |
| if ( flags & PR_SHM_EXCL ) |
| oflag |= O_EXCL; |
| shm->id = shm_open( shm->ipcname, oflag, shm->mode ); |
| } else { |
| shm->id = shm_open( shm->ipcname, O_RDWR, shm->mode ); |
| } |
| |
| if ( -1 == shm->id ) { |
| _PR_MD_MAP_DEFAULT_ERROR( errno ); |
| PR_LOG(_pr_shm_lm, PR_LOG_DEBUG, |
| ("_MD_OpenSharedMemory(): shm_open failed: %s, OSError: %d", |
| shm->ipcname, PR_GetOSError())); |
| PR_DELETE( shm->ipcname ); |
| PR_DELETE( shm ); |
| return(NULL); |
| } |
| |
| end = ftruncate( shm->id, shm->size ); |
| if ( -1 == end ) { |
| _PR_MD_MAP_DEFAULT_ERROR( errno ); |
| PR_LOG(_pr_shm_lm, PR_LOG_DEBUG, |
| ("_MD_OpenSharedMemory(): ftruncate failed, OSError: %d", |
| PR_GetOSError())); |
| PR_DELETE( shm->ipcname ); |
| PR_DELETE( shm ); |
| return(NULL); |
| } |
| |
| return(shm); |
| } /* end _MD_OpenSharedMemory() */ |
| |
| extern void * _MD_AttachSharedMemory( PRSharedMemory *shm, PRIntn flags ) |
| { |
| void *addr; |
| PRIntn prot = (PROT_READ | PROT_WRITE); |
| |
| PR_ASSERT( shm->ident == _PR_SHM_IDENT ); |
| |
| if ( PR_SHM_READONLY == flags) |
| prot ^= PROT_WRITE; |
| |
| addr = mmap( (void*)0, shm->size, prot, MAP_SHARED, shm->id, 0 ); |
| if ((void*)-1 == addr ) |
| { |
| _PR_MD_MAP_DEFAULT_ERROR( errno ); |
| PR_LOG( _pr_shm_lm, PR_LOG_DEBUG, |
| ("_MD_AttachSharedMemory(): mmap failed: %s, errno: %d", |
| shm->ipcname, PR_GetOSError())); |
| addr = NULL; |
| } else { |
| PR_LOG( _pr_shm_lm, PR_LOG_DEBUG, |
| ("_MD_AttachSharedMemory(): name: %s, attached at: %p", shm->ipcname, addr)); |
| } |
| |
| return addr; |
| } |
| |
| extern PRStatus _MD_DetachSharedMemory( PRSharedMemory *shm, void *addr ) |
| { |
| PRStatus rc = PR_SUCCESS; |
| PRIntn urc; |
| |
| PR_ASSERT( shm->ident == _PR_SHM_IDENT ); |
| |
| urc = munmap( addr, shm->size ); |
| if ( -1 == urc ) |
| { |
| rc = PR_FAILURE; |
| _PR_MD_MAP_DEFAULT_ERROR( errno ); |
| PR_LOG( _pr_shm_lm, PR_LOG_DEBUG, |
| ("_MD_DetachSharedMemory(): munmap failed: %s, errno: %d", |
| shm->ipcname, PR_GetOSError())); |
| } |
| return rc; |
| } |
| |
| extern PRStatus _MD_CloseSharedMemory( PRSharedMemory *shm ) |
| { |
| int urc; |
| |
| PR_ASSERT( shm->ident == _PR_SHM_IDENT ); |
| |
| urc = close( shm->id ); |
| if ( -1 == urc ) { |
| _PR_MD_MAP_CLOSE_ERROR( errno ); |
| PR_LOG( _pr_shm_lm, PR_LOG_DEBUG, |
| ("_MD_CloseSharedMemory(): close() failed, error: %d", PR_GetOSError())); |
| return(PR_FAILURE); |
| } |
| PR_DELETE( shm->ipcname ); |
| PR_DELETE( shm ); |
| return PR_SUCCESS; |
| } |
| |
| extern PRStatus _MD_DeleteSharedMemory( const char *name ) |
| { |
| PRStatus rc = PR_SUCCESS; |
| PRUintn urc; |
| char ipcname[PR_IPC_NAME_SIZE]; |
| |
| rc = _PR_MakeNativeIPCName( name, ipcname, PR_IPC_NAME_SIZE, _PRIPCShm ); |
| if ( PR_FAILURE == rc ) |
| { |
| PR_SetError( PR_UNKNOWN_ERROR , errno ); |
| PR_LOG( _pr_shm_lm, PR_LOG_DEBUG, |
| ("_MD_OpenSharedMemory(): _PR_MakeNativeIPCName() failed: %s", name )); |
| return rc; |
| } |
| |
| urc = shm_unlink( ipcname ); |
| if ( -1 == urc ) { |
| rc = PR_FAILURE; |
| _PR_MD_MAP_DEFAULT_ERROR( errno ); |
| PR_LOG( _pr_shm_lm, PR_LOG_DEBUG, |
| ("_MD_DeleteSharedMemory(): shm_unlink failed: %s, errno: %d", |
| ipcname, PR_GetOSError())); |
| } else { |
| PR_LOG( _pr_shm_lm, PR_LOG_DEBUG, |
| ("_MD_DeleteSharedMemory(): %s, success", ipcname)); |
| } |
| |
| return rc; |
| } /* end _MD_DeleteSharedMemory() */ |
| #endif |
| |
| |
| |
| /* |
| ** Unix implementation for anonymous memory (file) mapping |
| */ |
| extern PRLogModuleInfo *_pr_shma_lm; |
| |
| #include <unistd.h> |
| |
| extern PRFileMap* _md_OpenAnonFileMap( |
| const char *dirName, |
| PRSize size, |
| PRFileMapProtect prot |
| ) |
| { |
| PRFileMap *fm = NULL; |
| PRFileDesc *fd; |
| int osfd; |
| PRIntn urc; |
| PRIntn mode = 0600; |
| char *genName; |
| pid_t pid = getpid(); /* for generating filename */ |
| PRThread *tid = PR_GetCurrentThread(); /* for generating filename */ |
| int incr; /* for generating filename */ |
| const int maxTries = 20; /* maximum # attempts at a unique filename */ |
| PRInt64 size64; /* 64-bit version of 'size' */ |
| |
| /* |
| ** generate a filename from input and runtime environment |
| ** open the file, unlink the file. |
| ** make maxTries number of attempts at uniqueness in the filename |
| */ |
| for ( incr = 0; incr < maxTries ; incr++ ) { |
| #if defined(SYMBIAN) |
| #define NSPR_AFM_FILENAME "%s\\NSPR-AFM-%d-%p.%d" |
| #else |
| #define NSPR_AFM_FILENAME "%s/.NSPR-AFM-%d-%p.%d" |
| #endif |
| genName = PR_smprintf( NSPR_AFM_FILENAME, |
| dirName, (int) pid, tid, incr ); |
| if ( NULL == genName ) { |
| PR_LOG( _pr_shma_lm, PR_LOG_DEBUG, |
| ("_md_OpenAnonFileMap(): PR_snprintf(): failed, generating filename")); |
| goto Finished; |
| } |
| |
| /* create the file */ |
| osfd = open( genName, (O_CREAT | O_EXCL | O_RDWR), mode ); |
| if ( -1 == osfd ) { |
| if ( EEXIST == errno ) { |
| PR_smprintf_free( genName ); |
| continue; /* name exists, try again */ |
| } else { |
| _PR_MD_MAP_OPEN_ERROR( errno ); |
| PR_LOG( _pr_shma_lm, PR_LOG_DEBUG, |
| ("_md_OpenAnonFileMap(): open(): failed, filename: %s, errno: %d", |
| genName, PR_GetOSError())); |
| PR_smprintf_free( genName ); |
| goto Finished; |
| } |
| } |
| break; /* name generation and open successful, break; */ |
| } /* end for() */ |
| |
| if ( incr == maxTries ) { |
| PR_ASSERT( -1 == osfd ); |
| PR_ASSERT( EEXIST == errno ); |
| _PR_MD_MAP_OPEN_ERROR( errno ); |
| goto Finished; |
| } |
| |
| urc = unlink( genName ); |
| #if defined(SYMBIAN) && defined(__WINS__) |
| /* If it is being used by the system or another process, Symbian OS |
| * Emulator(WINS) considers this an error. */ |
| if ( -1 == urc && EACCES != errno ) { |
| #else |
| if ( -1 == urc ) { |
| #endif |
| _PR_MD_MAP_UNLINK_ERROR( errno ); |
| PR_LOG( _pr_shma_lm, PR_LOG_DEBUG, |
| ("_md_OpenAnonFileMap(): failed on unlink(), errno: %d", errno)); |
| PR_smprintf_free( genName ); |
| close( osfd ); |
| goto Finished; |
| } |
| PR_LOG( _pr_shma_lm, PR_LOG_DEBUG, |
| ("_md_OpenAnonFileMap(): unlink(): %s", genName )); |
| |
| PR_smprintf_free( genName ); |
| |
| fd = PR_ImportFile( osfd ); |
| if ( NULL == fd ) { |
| PR_LOG( _pr_shma_lm, PR_LOG_DEBUG, |
| ("_md_OpenAnonFileMap(): PR_ImportFile(): failed")); |
| goto Finished; |
| } |
| PR_LOG( _pr_shma_lm, PR_LOG_DEBUG, |
| ("_md_OpenAnonFileMap(): fd: %p", fd )); |
| |
| urc = ftruncate( fd->secret->md.osfd, size ); |
| if ( -1 == urc ) { |
| _PR_MD_MAP_DEFAULT_ERROR( errno ); |
| PR_LOG( _pr_shma_lm, PR_LOG_DEBUG, |
| ("_md_OpenAnonFileMap(): failed on ftruncate(), errno: %d", errno)); |
| PR_Close( fd ); |
| goto Finished; |
| } |
| PR_LOG( _pr_shma_lm, PR_LOG_DEBUG, |
| ("_md_OpenAnonFileMap(): ftruncate(): size: %d", size )); |
| |
| LL_UI2L(size64, size); /* PRSize (size_t) is unsigned */ |
| fm = PR_CreateFileMap( fd, size64, prot ); |
| if ( NULL == fm ) { |
| PR_LOG( _pr_shma_lm, PR_LOG_DEBUG, |
| ("PR_OpenAnonFileMap(): failed")); |
| PR_Close( fd ); |
| goto Finished; |
| } |
| fm->md.isAnonFM = PR_TRUE; /* set fd close */ |
| |
| PR_LOG( _pr_shma_lm, PR_LOG_DEBUG, |
| ("_md_OpenAnonFileMap(): PR_CreateFileMap(): fm: %p", fm )); |
| |
| Finished: |
| return(fm); |
| } /* end md_OpenAnonFileMap() */ |
| |
| /* |
| ** _md_ExportFileMapAsString() |
| ** |
| ** |
| */ |
| extern PRStatus _md_ExportFileMapAsString( |
| PRFileMap *fm, |
| PRSize bufSize, |
| char *buf |
| ) |
| { |
| PRIntn written; |
| PRIntn prot = (PRIntn)fm->prot; |
| |
| written = PR_snprintf( buf, bufSize, "%ld:%d", |
| fm->fd->secret->md.osfd, prot ); |
| |
| return((written == -1)? PR_FAILURE : PR_SUCCESS); |
| } /* end _md_ExportFileMapAsString() */ |
| |
| |
| extern PRFileMap * _md_ImportFileMapFromString( |
| const char *fmstring |
| ) |
| { |
| PRStatus rc; |
| PRInt32 osfd; |
| PRIntn prot; /* really: a PRFileMapProtect */ |
| PRFileDesc *fd; |
| PRFileMap *fm = NULL; /* default return value */ |
| PRFileInfo64 info; |
| |
| PR_sscanf( fmstring, "%ld:%d", &osfd, &prot ); |
| |
| /* import the os file descriptor */ |
| fd = PR_ImportFile( osfd ); |
| if ( NULL == fd ) { |
| PR_LOG( _pr_shma_lm, PR_LOG_DEBUG, |
| ("_md_ImportFileMapFromString(): PR_ImportFile() failed")); |
| goto Finished; |
| } |
| |
| rc = PR_GetOpenFileInfo64( fd, &info ); |
| if ( PR_FAILURE == rc ) { |
| PR_LOG( _pr_shma_lm, PR_LOG_DEBUG, |
| ("_md_ImportFileMapFromString(): PR_GetOpenFileInfo64() failed")); |
| goto Finished; |
| } |
| |
| fm = PR_CreateFileMap( fd, info.size, (PRFileMapProtect)prot ); |
| if ( NULL == fm ) { |
| PR_LOG( _pr_shma_lm, PR_LOG_DEBUG, |
| ("_md_ImportFileMapFromString(): PR_CreateFileMap() failed")); |
| } |
| |
| Finished: |
| return(fm); |
| } /* end _md_ImportFileMapFromString() */ |
