Bug Summary

File:pr/Linux4.19_x86_64_gcc_glibc_PTH_64_DBG.OBJ/pr/src/md/unix/../../../../../pr/src/md/unix/uxshm.c
Warning:line 105, column 9
Value stored to 'rc' is never read

Annotated Source Code

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clang -cc1 -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name uxshm.c -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -analyzer-config-compatibility-mode=true -mrelocation-model pic -pic-level 2 -fhalf-no-semantic-interposition -mframe-pointer=all -fmath-errno -ffp-contract=on -fno-rounding-math -mconstructor-aliases -funwind-tables=2 -target-cpu x86-64 -tune-cpu generic -debugger-tuning=gdb -fdebug-compilation-dir=/var/lib/jenkins/workspace/nss-scan-build/nspr/Linux4.19_x86_64_gcc_glibc_PTH_64_DBG.OBJ/pr/src/md/unix -fcoverage-compilation-dir=/var/lib/jenkins/workspace/nss-scan-build/nspr/Linux4.19_x86_64_gcc_glibc_PTH_64_DBG.OBJ/pr/src/md/unix -resource-dir /usr/lib/llvm-18/lib/clang/18 -U NDEBUG -D DEBUG_jenkins -D PACKAGE_NAME="" -D PACKAGE_TARNAME="" -D PACKAGE_VERSION="" -D PACKAGE_STRING="" -D PACKAGE_BUGREPORT="" -D PACKAGE_URL="" -D DEBUG=1 -D HAVE_VISIBILITY_HIDDEN_ATTRIBUTE=1 -D HAVE_VISIBILITY_PRAGMA=1 -D XP_UNIX=1 -D _GNU_SOURCE=1 -D HAVE_FCNTL_FILE_LOCKING=1 -D HAVE_POINTER_LOCALTIME_R=1 -D LINUX=1 -D HAVE_DLADDR=1 -D HAVE_GETTID=1 -D HAVE_LCHOWN=1 -D HAVE_SETPRIORITY=1 -D HAVE_STRERROR=1 -D HAVE_SYSCALL=1 -D HAVE_SECURE_GETENV=1 -D _REENTRANT=1 -D FORCE_PR_LOG -D _PR_PTHREADS -U HAVE_CVAR_BUILT_ON_SEM -D _NSPR_BUILD_ -I /var/lib/jenkins/workspace/nss-scan-build/nss/../dist/Linux4.19_x86_64_gcc_glibc_PTH_64_DBG.OBJ/include -I ../../../../../pr/include -I ../../../../../pr/include/private -internal-isystem /usr/lib/llvm-18/lib/clang/18/include -internal-isystem /usr/local/include -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/14/../../../../x86_64-linux-gnu/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -ferror-limit 19 -fvisibility=hidden -fgnuc-version=4.2.1 -fno-inline -analyzer-output=html -analyzer-config stable-report-filename=true -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /tmp/scan-build-2024-05-18-082241-28900-1 -x c ../../../../../pr/src/md/unix/uxshm.c
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
20extern PRLogModuleInfo *_pr_shm_lm;
21
22
23#define NSPR_IPC_SHM_KEY'b' '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 _MD_OpenSharedMemory
34#define _MD_ATTACH_SHARED_MEMORY_MD_AttachSharedMemory _MD_AttachSharedMemory
35#define _MD_DETACH_SHARED_MEMORY_MD_DetachSharedMemory _MD_DetachSharedMemory
36#define _MD_CLOSE_SHARED_MEMORY_MD_CloseSharedMemory _MD_CloseSharedMemory
37#define _MD_DELETE_SHARED_MEMORY_MD_DeleteSharedMemory _MD_DeleteSharedMemory
38
39extern 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_SIZE1024];
50
51 rc = _PR_MakeNativeIPCName( name, ipcname, PR_IPC_NAME_SIZE1024, _PRIPCShm );
52 if ( PR_FAILURE == rc )
53 {
54 _PR_MD_MAP_DEFAULT_ERROR_MD_unix_map_default_error( errno(*__errno_location ()) );
55 PR_LOG( _pr_shm_lm, PR_LOG_DEBUG,do { if (((_pr_shm_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("_MD_OpenSharedMemory(): _PR_MakeNativeIPCName() failed: %s"
, name ); } } while (0)
56 ("_MD_OpenSharedMemory(): _PR_MakeNativeIPCName() failed: %s", name ))do { if (((_pr_shm_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("_MD_OpenSharedMemory(): _PR_MakeNativeIPCName() failed: %s"
, name ); } } while (0);
57 return( NULL((void*)0) );
58 }
59
60 shm = PR_NEWZAP( PRSharedMemory )((PRSharedMemory*)PR_Calloc(1, sizeof(PRSharedMemory)));
61 if ( NULL((void*)0) == shm )
62 {
63 PR_SetError(PR_OUT_OF_MEMORY_ERROR(-6000L), 0 );
64 PR_LOG(_pr_shm_lm, PR_LOG_DEBUG, ( "PR_OpenSharedMemory: New PRSharedMemory out of memory"))do { if (((_pr_shm_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
( "PR_OpenSharedMemory: New PRSharedMemory out of memory"); }
} while (0);
65 return( NULL((void*)0) );
66 }
67
68 shm->ipcname = (char*)PR_MALLOC( strlen( ipcname ) + 1 )(PR_Malloc((strlen( ipcname ) + 1)));
69 if ( NULL((void*)0) == shm->ipcname )
70 {
71 PR_SetError(PR_OUT_OF_MEMORY_ERROR(-6000L), 0 );
72 PR_LOG(_pr_shm_lm, PR_LOG_DEBUG, ( "PR_OpenSharedMemory: New shm->ipcname out of memory"))do { if (((_pr_shm_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
( "PR_OpenSharedMemory: New shm->ipcname out of memory");
} } while (0);
73 PR_DELETE( shm ){ PR_Free(shm); (shm) = ((void*)0); };
74 return( NULL((void*)0) );
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_IDENT0xdeadbad;
83
84 /* create the file first */
85 if ( flags & PR_SHM_CREATE0x1 ) {
86 int osfd = open( shm->ipcname, (O_RDWR02 | O_CREAT0100), shm->mode );
87 if ( -1 == osfd ) {
88 _PR_MD_MAP_OPEN_ERROR_MD_unix_map_open_error( errno(*__errno_location ()) );
89 PR_FREEIF( shm->ipcname )if (shm->ipcname) { PR_Free(shm->ipcname); (shm->ipcname
) = ((void*)0); };
90 PR_DELETE( shm ){ PR_Free(shm); (shm) = ((void*)0); };
91 return( NULL((void*)0) );
92 }
93 if ( close(osfd) == -1 ) {
94 _PR_MD_MAP_CLOSE_ERROR_MD_unix_map_close_error( errno(*__errno_location ()) );
95 PR_FREEIF( shm->ipcname )if (shm->ipcname) { PR_Free(shm->ipcname); (shm->ipcname
) = ((void*)0); };
96 PR_DELETE( shm ){ PR_Free(shm); (shm) = ((void*)0); };
97 return( NULL((void*)0) );
98 }
99 }
100
101 /* hash the shm.name to an ID */
102 key = ftok( shm->ipcname, NSPR_IPC_SHM_KEY'b' );
103 if ( -1 == key )
104 {
105 rc = PR_FAILURE;
Value stored to 'rc' is never read
106 _PR_MD_MAP_DEFAULT_ERROR_MD_unix_map_default_error( errno(*__errno_location ()) );
107 PR_LOG( _pr_shm_lm, PR_LOG_DEBUG,do { if (((_pr_shm_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("_MD_OpenSharedMemory(): ftok() failed on name: %s", shm->
ipcname); } } while (0)
108 ("_MD_OpenSharedMemory(): ftok() failed on name: %s", shm->ipcname))do { if (((_pr_shm_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("_MD_OpenSharedMemory(): ftok() failed on name: %s", shm->
ipcname); } } while (0);
109 PR_FREEIF( shm->ipcname )if (shm->ipcname) { PR_Free(shm->ipcname); (shm->ipcname
) = ((void*)0); };
110 PR_DELETE( shm ){ PR_Free(shm); (shm) = ((void*)0); };
111 return( NULL((void*)0) );
112 }
113
114 /* get the shared memory */
115 if ( flags & PR_SHM_CREATE0x1 ) {
116 shm->id = shmget( key, shm->size, ( shm->mode | IPC_CREAT01000|IPC_EXCL02000));
117 if ( shm->id >= 0 ) {
118 return( shm );
119 }
120 if ((errno(*__errno_location ()) == EEXIST17) && (flags & PR_SHM_EXCL0x2)) {
121 PR_SetError( PR_FILE_EXISTS_ERROR(-5943L), errno(*__errno_location ()) );
122 PR_LOG( _pr_shm_lm, PR_LOG_DEBUG,do { if (((_pr_shm_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("_MD_OpenSharedMemory(): shmget() exclusive failed, errno: %d"
, (*__errno_location ())); } } while (0)
123 ("_MD_OpenSharedMemory(): shmget() exclusive failed, errno: %d", errno))do { if (((_pr_shm_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("_MD_OpenSharedMemory(): shmget() exclusive failed, errno: %d"
, (*__errno_location ())); } } while (0);
124 PR_FREEIF(shm->ipcname)if (shm->ipcname) { PR_Free(shm->ipcname); (shm->ipcname
) = ((void*)0); };
125 PR_DELETE(shm){ PR_Free(shm); (shm) = ((void*)0); };
126 return(NULL((void*)0));
127 }
128 }
129
130 shm->id = shmget( key, shm->size, shm->mode );
131 if ( -1 == shm->id ) {
132 _PR_MD_MAP_DEFAULT_ERROR_MD_unix_map_default_error( errno(*__errno_location ()) );
133 PR_LOG( _pr_shm_lm, PR_LOG_DEBUG,do { if (((_pr_shm_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("_MD_OpenSharedMemory(): shmget() failed, errno: %d", (*__errno_location
())); } } while (0)
134 ("_MD_OpenSharedMemory(): shmget() failed, errno: %d", errno))do { if (((_pr_shm_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("_MD_OpenSharedMemory(): shmget() failed, errno: %d", (*__errno_location
())); } } while (0);
135 PR_FREEIF(shm->ipcname)if (shm->ipcname) { PR_Free(shm->ipcname); (shm->ipcname
) = ((void*)0); };
136 PR_DELETE(shm){ PR_Free(shm); (shm) = ((void*)0); };
137 return(NULL((void*)0));
138 }
139
140 return( shm );
141} /* end _MD_OpenSharedMemory() */
142
143extern 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 )((shm->ident == 0xdeadbad)?((void)0):PR_Assert("shm->ident == _PR_SHM_IDENT"
,"../../../../../pr/src/md/unix/uxshm.c",148));
149
150 aFlags |= (flags & PR_SHM_READONLY0x01 )? SHM_RDONLY010000 : 0;
151
152 addr = shmat( shm->id, NULL((void*)0), aFlags );
153 if ( (void*)-1 == addr )
154 {
155 _PR_MD_MAP_DEFAULT_ERROR_MD_unix_map_default_error( errno(*__errno_location ()) );
156 PR_LOG( _pr_shm_lm, PR_LOG_DEBUG,do { if (((_pr_shm_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("_MD_AttachSharedMemory(): shmat() failed on name: %s, OsError: %d"
, shm->ipcname, PR_GetOSError() ); } } while (0)
157 ("_MD_AttachSharedMemory(): shmat() failed on name: %s, OsError: %d",do { if (((_pr_shm_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("_MD_AttachSharedMemory(): shmat() failed on name: %s, OsError: %d"
, shm->ipcname, PR_GetOSError() ); } } while (0)
158 shm->ipcname, PR_GetOSError() ))do { if (((_pr_shm_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("_MD_AttachSharedMemory(): shmat() failed on name: %s, OsError: %d"
, shm->ipcname, PR_GetOSError() ); } } while (0);
159 addr = NULL((void*)0);
160 }
161
162 return addr;
163}
164
165extern 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 )((shm->ident == 0xdeadbad)?((void)0):PR_Assert("shm->ident == _PR_SHM_IDENT"
,"../../../../../pr/src/md/unix/uxshm.c",170));
171
172 urc = shmdt( addr );
173 if ( -1 == urc )
174 {
175 rc = PR_FAILURE;
176 _PR_MD_MAP_DEFAULT_ERROR_MD_unix_map_default_error( errno(*__errno_location ()) );
177 PR_LOG( _pr_shm_lm, PR_LOG_DEBUG,do { if (((_pr_shm_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("_MD_DetachSharedMemory(): shmdt() failed on name: %s", shm
->ipcname ); } } while (0)
178 ("_MD_DetachSharedMemory(): shmdt() failed on name: %s", shm->ipcname ))do { if (((_pr_shm_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("_MD_DetachSharedMemory(): shmdt() failed on name: %s", shm
->ipcname ); } } while (0);
179 }
180
181 return rc;
182}
183
184extern PRStatus _MD_CloseSharedMemory( PRSharedMemory *shm )
185{
186 PR_ASSERT( shm->ident == _PR_SHM_IDENT )((shm->ident == 0xdeadbad)?((void)0):PR_Assert("shm->ident == _PR_SHM_IDENT"
,"../../../../../pr/src/md/unix/uxshm.c",186));
187
188 PR_FREEIF(shm->ipcname)if (shm->ipcname) { PR_Free(shm->ipcname); (shm->ipcname
) = ((void*)0); };
189 PR_DELETE(shm){ PR_Free(shm); (shm) = ((void*)0); };
190
191 return PR_SUCCESS;
192}
193
194extern 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_SIZE1024];
201
202 rc = _PR_MakeNativeIPCName( name, ipcname, PR_IPC_NAME_SIZE1024, _PRIPCShm );
203 if ( PR_FAILURE == rc )
204 {
205 PR_SetError( PR_UNKNOWN_ERROR(-5994L), errno(*__errno_location ()) );
206 PR_LOG( _pr_shm_lm, PR_LOG_DEBUG,do { if (((_pr_shm_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("_MD_DeleteSharedMemory(): _PR_MakeNativeIPCName() failed: %s"
, name ); } } while (0)
207 ("_MD_DeleteSharedMemory(): _PR_MakeNativeIPCName() failed: %s", name ))do { if (((_pr_shm_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("_MD_DeleteSharedMemory(): _PR_MakeNativeIPCName() failed: %s"
, name ); } } while (0);
208 return(PR_FAILURE);
209 }
210
211 /* create the file first */
212 {
213 int osfd = open( ipcname, (O_RDWR02 | O_CREAT0100), 0666 );
214 if ( -1 == osfd ) {
215 _PR_MD_MAP_OPEN_ERROR_MD_unix_map_open_error( errno(*__errno_location ()) );
216 return( PR_FAILURE );
217 }
218 if ( close(osfd) == -1 ) {
219 _PR_MD_MAP_CLOSE_ERROR_MD_unix_map_close_error( errno(*__errno_location ()) );
220 return( PR_FAILURE );
221 }
222 }
223
224 /* hash the shm.name to an ID */
225 key = ftok( ipcname, NSPR_IPC_SHM_KEY'b' );
226 if ( -1 == key )
227 {
228 rc = PR_FAILURE;
229 _PR_MD_MAP_DEFAULT_ERROR_MD_unix_map_default_error( errno(*__errno_location ()) );
230 PR_LOG( _pr_shm_lm, PR_LOG_DEBUG,do { if (((_pr_shm_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("_MD_DeleteSharedMemory(): ftok() failed on name: %s", ipcname
); } } while (0)
231 ("_MD_DeleteSharedMemory(): ftok() failed on name: %s", ipcname))do { if (((_pr_shm_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("_MD_DeleteSharedMemory(): ftok() failed on name: %s", ipcname
); } } while (0);
232 }
233
234 id = shmget( key, 0, 0 );
235 if ( -1 == id ) {
236 _PR_MD_MAP_DEFAULT_ERROR_MD_unix_map_default_error( errno(*__errno_location ()) );
237 PR_LOG( _pr_shm_lm, PR_LOG_DEBUG,do { if (((_pr_shm_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("_MD_DeleteSharedMemory(): shmget() failed, errno: %d", (*__errno_location
())); } } while (0)
238 ("_MD_DeleteSharedMemory(): shmget() failed, errno: %d", errno))do { if (((_pr_shm_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("_MD_DeleteSharedMemory(): shmget() failed, errno: %d", (*__errno_location
())); } } while (0);
239 return(PR_FAILURE);
240 }
241
242 urc = shmctl( id, IPC_RMID0, NULL((void*)0) );
243 if ( -1 == urc )
244 {
245 _PR_MD_MAP_DEFAULT_ERROR_MD_unix_map_default_error( errno(*__errno_location ()) );
246 PR_LOG( _pr_shm_lm, PR_LOG_DEBUG,do { if (((_pr_shm_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("_MD_DeleteSharedMemory(): shmctl() failed on name: %s", ipcname
); } } while (0)
247 ("_MD_DeleteSharedMemory(): shmctl() failed on name: %s", ipcname ))do { if (((_pr_shm_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("_MD_DeleteSharedMemory(): shmctl() failed on name: %s", ipcname
); } } while (0);
248 return(PR_FAILURE);
249 }
250
251 urc = unlink( ipcname );
252 if ( -1 == urc ) {
253 _PR_MD_MAP_UNLINK_ERROR_MD_unix_map_unlink_error( errno(*__errno_location ()) );
254 PR_LOG( _pr_shm_lm, PR_LOG_DEBUG,do { if (((_pr_shm_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("_MD_DeleteSharedMemory(): unlink() failed: %s", ipcname );
} } while (0)
255 ("_MD_DeleteSharedMemory(): unlink() failed: %s", ipcname ))do { if (((_pr_shm_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("_MD_DeleteSharedMemory(): unlink() failed: %s", ipcname );
} } while (0);
256 return(PR_FAILURE);
257 }
258
259 return rc;
260} /* end _MD_DeleteSharedMemory() */
261
262/*
263** Implementation for Posix
264*/
265#elif defined PR_HAVE_POSIX_NAMED_SHARED_MEMORY
266#include <sys/mman.h>
267
268#define _MD_OPEN_SHARED_MEMORY_MD_OpenSharedMemory _MD_OpenSharedMemory
269#define _MD_ATTACH_SHARED_MEMORY_MD_AttachSharedMemory _MD_AttachSharedMemory
270#define _MD_DETACH_SHARED_MEMORY_MD_DetachSharedMemory _MD_DetachSharedMemory
271#define _MD_CLOSE_SHARED_MEMORY_MD_CloseSharedMemory _MD_CloseSharedMemory
272#define _MD_DELETE_SHARED_MEMORY_MD_DeleteSharedMemory _MD_DeleteSharedMemory
273
274struct _MDSharedMemory {
275 int handle;
276};
277
278extern PRSharedMemory * _MD_OpenSharedMemory(
279 const char *name,
280 PRSize size,
281 PRIntn flags,
282 PRIntn mode
283)
284{
285 PRStatus rc = PR_SUCCESS;
286 PRInt32 end;
287 PRSharedMemory *shm;
288 char ipcname[PR_IPC_NAME_SIZE1024];
289
290 rc = _PR_MakeNativeIPCName( name, ipcname, PR_IPC_NAME_SIZE1024, _PRIPCShm );
291 if ( PR_FAILURE == rc )
292 {
293 PR_SetError( PR_UNKNOWN_ERROR(-5994L), errno(*__errno_location ()) );
294 PR_LOG( _pr_shm_lm, PR_LOG_DEBUG,do { if (((_pr_shm_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("_MD_OpenSharedMemory(): _PR_MakeNativeIPCName() failed: %s"
, name ); } } while (0)
295 ("_MD_OpenSharedMemory(): _PR_MakeNativeIPCName() failed: %s", name ))do { if (((_pr_shm_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("_MD_OpenSharedMemory(): _PR_MakeNativeIPCName() failed: %s"
, name ); } } while (0);
296 return( NULL((void*)0) );
297 }
298
299 shm = PR_NEWZAP( PRSharedMemory )((PRSharedMemory*)PR_Calloc(1, sizeof(PRSharedMemory)));
300 if ( NULL((void*)0) == shm )
301 {
302 PR_SetError(PR_OUT_OF_MEMORY_ERROR(-6000L), 0 );
303 PR_LOG(_pr_shm_lm, PR_LOG_DEBUG, ( "PR_OpenSharedMemory: New PRSharedMemory out of memory"))do { if (((_pr_shm_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
( "PR_OpenSharedMemory: New PRSharedMemory out of memory"); }
} while (0);
304 return( NULL((void*)0) );
305 }
306
307 shm->ipcname = PR_MALLOC( strlen( ipcname ) + 1 )(PR_Malloc((strlen( ipcname ) + 1)));
308 if ( NULL((void*)0) == shm->ipcname )
309 {
310 PR_SetError(PR_OUT_OF_MEMORY_ERROR(-6000L), 0 );
311 PR_LOG(_pr_shm_lm, PR_LOG_DEBUG, ( "PR_OpenSharedMemory: New shm->ipcname out of memory"))do { if (((_pr_shm_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
( "PR_OpenSharedMemory: New shm->ipcname out of memory");
} } while (0);
312 return( NULL((void*)0) );
313 }
314
315 /* copy args to struct */
316 strcpy( shm->ipcname, ipcname );
317 shm->size = size;
318 shm->mode = mode;
319 shm->flags = flags;
320 shm->ident = _PR_SHM_IDENT0xdeadbad;
321
322 /*
323 ** Create the shared memory
324 */
325 if ( flags & PR_SHM_CREATE0x1 ) {
326 int oflag = (O_CREAT0100 | O_RDWR02);
327
328 if ( flags & PR_SHM_EXCL0x2 ) {
329 oflag |= O_EXCL0200;
330 }
331 shm->id = shm_open( shm->ipcname, oflag, shm->mode );
332 } else {
333 shm->id = shm_open( shm->ipcname, O_RDWR02, shm->mode );
334 }
335
336 if ( -1 == shm->id ) {
337 _PR_MD_MAP_DEFAULT_ERROR_MD_unix_map_default_error( errno(*__errno_location ()) );
338 PR_LOG(_pr_shm_lm, PR_LOG_DEBUG,do { if (((_pr_shm_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("_MD_OpenSharedMemory(): shm_open failed: %s, OSError: %d",
shm->ipcname, PR_GetOSError()); } } while (0)
339 ("_MD_OpenSharedMemory(): shm_open failed: %s, OSError: %d",do { if (((_pr_shm_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("_MD_OpenSharedMemory(): shm_open failed: %s, OSError: %d",
shm->ipcname, PR_GetOSError()); } } while (0)
340 shm->ipcname, PR_GetOSError()))do { if (((_pr_shm_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("_MD_OpenSharedMemory(): shm_open failed: %s, OSError: %d",
shm->ipcname, PR_GetOSError()); } } while (0);
341 PR_DELETE( shm->ipcname ){ PR_Free(shm->ipcname); (shm->ipcname) = ((void*)0); };
342 PR_DELETE( shm ){ PR_Free(shm); (shm) = ((void*)0); };
343 return(NULL((void*)0));
344 }
345
346 end = ftruncate( shm->id, shm->size );
347 if ( -1 == end ) {
348 _PR_MD_MAP_DEFAULT_ERROR_MD_unix_map_default_error( errno(*__errno_location ()) );
349 PR_LOG(_pr_shm_lm, PR_LOG_DEBUG,do { if (((_pr_shm_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("_MD_OpenSharedMemory(): ftruncate failed, OSError: %d", PR_GetOSError
()); } } while (0)
350 ("_MD_OpenSharedMemory(): ftruncate failed, OSError: %d",do { if (((_pr_shm_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("_MD_OpenSharedMemory(): ftruncate failed, OSError: %d", PR_GetOSError
()); } } while (0)
351 PR_GetOSError()))do { if (((_pr_shm_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("_MD_OpenSharedMemory(): ftruncate failed, OSError: %d", PR_GetOSError
()); } } while (0);
352 PR_DELETE( shm->ipcname ){ PR_Free(shm->ipcname); (shm->ipcname) = ((void*)0); };
353 PR_DELETE( shm ){ PR_Free(shm); (shm) = ((void*)0); };
354 return(NULL((void*)0));
355 }
356
357 return(shm);
358} /* end _MD_OpenSharedMemory() */
359
360extern void * _MD_AttachSharedMemory( PRSharedMemory *shm, PRIntn flags )
361{
362 void *addr;
363 PRIntn prot = (PROT_READ0x1 | PROT_WRITE0x2);
364
365 PR_ASSERT( shm->ident == _PR_SHM_IDENT )((shm->ident == 0xdeadbad)?((void)0):PR_Assert("shm->ident == _PR_SHM_IDENT"
,"../../../../../pr/src/md/unix/uxshm.c",365));
366
367 if ( PR_SHM_READONLY0x01 == flags) {
368 prot ^= PROT_WRITE0x2;
369 }
370
371 addr = mmap( (void*)0, shm->size, prot, MAP_SHARED0x01, shm->id, 0 );
372 if ((void*)-1 == addr )
373 {
374 _PR_MD_MAP_DEFAULT_ERROR_MD_unix_map_default_error( errno(*__errno_location ()) );
375 PR_LOG( _pr_shm_lm, PR_LOG_DEBUG,do { if (((_pr_shm_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("_MD_AttachSharedMemory(): mmap failed: %s, errno: %d", shm
->ipcname, PR_GetOSError()); } } while (0)
376 ("_MD_AttachSharedMemory(): mmap failed: %s, errno: %d",do { if (((_pr_shm_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("_MD_AttachSharedMemory(): mmap failed: %s, errno: %d", shm
->ipcname, PR_GetOSError()); } } while (0)
377 shm->ipcname, PR_GetOSError()))do { if (((_pr_shm_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("_MD_AttachSharedMemory(): mmap failed: %s, errno: %d", shm
->ipcname, PR_GetOSError()); } } while (0);
378 addr = NULL((void*)0);
379 } else {
380 PR_LOG( _pr_shm_lm, PR_LOG_DEBUG,do { if (((_pr_shm_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("_MD_AttachSharedMemory(): name: %s, attached at: %p", shm->
ipcname, addr); } } while (0)
381 ("_MD_AttachSharedMemory(): name: %s, attached at: %p", shm->ipcname, addr))do { if (((_pr_shm_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("_MD_AttachSharedMemory(): name: %s, attached at: %p", shm->
ipcname, addr); } } while (0);
382 }
383
384 return addr;
385}
386
387extern PRStatus _MD_DetachSharedMemory( PRSharedMemory *shm, void *addr )
388{
389 PRStatus rc = PR_SUCCESS;
390 PRIntn urc;
391
392 PR_ASSERT( shm->ident == _PR_SHM_IDENT )((shm->ident == 0xdeadbad)?((void)0):PR_Assert("shm->ident == _PR_SHM_IDENT"
,"../../../../../pr/src/md/unix/uxshm.c",392));
393
394 urc = munmap( addr, shm->size );
395 if ( -1 == urc )
396 {
397 rc = PR_FAILURE;
398 _PR_MD_MAP_DEFAULT_ERROR_MD_unix_map_default_error( errno(*__errno_location ()) );
399 PR_LOG( _pr_shm_lm, PR_LOG_DEBUG,do { if (((_pr_shm_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("_MD_DetachSharedMemory(): munmap failed: %s, errno: %d", shm
->ipcname, PR_GetOSError()); } } while (0)
400 ("_MD_DetachSharedMemory(): munmap failed: %s, errno: %d",do { if (((_pr_shm_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("_MD_DetachSharedMemory(): munmap failed: %s, errno: %d", shm
->ipcname, PR_GetOSError()); } } while (0)
401 shm->ipcname, PR_GetOSError()))do { if (((_pr_shm_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("_MD_DetachSharedMemory(): munmap failed: %s, errno: %d", shm
->ipcname, PR_GetOSError()); } } while (0);
402 }
403 return rc;
404}
405
406extern PRStatus _MD_CloseSharedMemory( PRSharedMemory *shm )
407{
408 int urc;
409
410 PR_ASSERT( shm->ident == _PR_SHM_IDENT )((shm->ident == 0xdeadbad)?((void)0):PR_Assert("shm->ident == _PR_SHM_IDENT"
,"../../../../../pr/src/md/unix/uxshm.c",410));
411
412 urc = close( shm->id );
413 if ( -1 == urc ) {
414 _PR_MD_MAP_CLOSE_ERROR_MD_unix_map_close_error( errno(*__errno_location ()) );
415 PR_LOG( _pr_shm_lm, PR_LOG_DEBUG,do { if (((_pr_shm_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("_MD_CloseSharedMemory(): close() failed, error: %d", PR_GetOSError
()); } } while (0)
416 ("_MD_CloseSharedMemory(): close() failed, error: %d", PR_GetOSError()))do { if (((_pr_shm_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("_MD_CloseSharedMemory(): close() failed, error: %d", PR_GetOSError
()); } } while (0);
417 return(PR_FAILURE);
418 }
419 PR_DELETE( shm->ipcname ){ PR_Free(shm->ipcname); (shm->ipcname) = ((void*)0); };
420 PR_DELETE( shm ){ PR_Free(shm); (shm) = ((void*)0); };
421 return PR_SUCCESS;
422}
423
424extern PRStatus _MD_DeleteSharedMemory( const char *name )
425{
426 PRStatus rc = PR_SUCCESS;
427 PRUintn urc;
428 char ipcname[PR_IPC_NAME_SIZE1024];
429
430 rc = _PR_MakeNativeIPCName( name, ipcname, PR_IPC_NAME_SIZE1024, _PRIPCShm );
431 if ( PR_FAILURE == rc )
432 {
433 PR_SetError( PR_UNKNOWN_ERROR(-5994L), errno(*__errno_location ()) );
434 PR_LOG( _pr_shm_lm, PR_LOG_DEBUG,do { if (((_pr_shm_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("_MD_OpenSharedMemory(): _PR_MakeNativeIPCName() failed: %s"
, name ); } } while (0)
435 ("_MD_OpenSharedMemory(): _PR_MakeNativeIPCName() failed: %s", name ))do { if (((_pr_shm_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("_MD_OpenSharedMemory(): _PR_MakeNativeIPCName() failed: %s"
, name ); } } while (0);
436 return rc;
437 }
438
439 urc = shm_unlink( ipcname );
440 if ( -1 == urc ) {
441 rc = PR_FAILURE;
442 _PR_MD_MAP_DEFAULT_ERROR_MD_unix_map_default_error( errno(*__errno_location ()) );
443 PR_LOG( _pr_shm_lm, PR_LOG_DEBUG,do { if (((_pr_shm_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("_MD_DeleteSharedMemory(): shm_unlink failed: %s, errno: %d"
, ipcname, PR_GetOSError()); } } while (0)
444 ("_MD_DeleteSharedMemory(): shm_unlink failed: %s, errno: %d",do { if (((_pr_shm_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("_MD_DeleteSharedMemory(): shm_unlink failed: %s, errno: %d"
, ipcname, PR_GetOSError()); } } while (0)
445 ipcname, PR_GetOSError()))do { if (((_pr_shm_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("_MD_DeleteSharedMemory(): shm_unlink failed: %s, errno: %d"
, ipcname, PR_GetOSError()); } } while (0);
446 } else {
447 PR_LOG( _pr_shm_lm, PR_LOG_DEBUG,do { if (((_pr_shm_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("_MD_DeleteSharedMemory(): %s, success", ipcname); } } while
(0)
448 ("_MD_DeleteSharedMemory(): %s, success", ipcname))do { if (((_pr_shm_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("_MD_DeleteSharedMemory(): %s, success", ipcname); } } while
(0);
449 }
450
451 return rc;
452} /* end _MD_DeleteSharedMemory() */
453#endif
454
455
456
457/*
458** Unix implementation for anonymous memory (file) mapping
459*/
460extern PRLogModuleInfo *_pr_shma_lm;
461
462#include <unistd.h>
463
464extern PRFileMap* _md_OpenAnonFileMap(
465 const char *dirName,
466 PRSize size,
467 PRFileMapProtect prot
468)
469{
470 PRFileMap *fm = NULL((void*)0);
471 PRFileDesc *fd;
472 int osfd;
473 PRIntn urc;
474 PRIntn mode = 0600;
475 char *genName;
476 pid_t pid = getpid(); /* for generating filename */
477 PRThread *tid = PR_GetCurrentThread(); /* for generating filename */
478 int incr; /* for generating filename */
479 const int maxTries = 20; /* maximum # attempts at a unique filename */
480 PRInt64 size64; /* 64-bit version of 'size' */
481
482 /*
483 ** generate a filename from input and runtime environment
484 ** open the file, unlink the file.
485 ** make maxTries number of attempts at uniqueness in the filename
486 */
487 for ( incr = 0; incr < maxTries ; incr++ ) {
488#define NSPR_AFM_FILENAME"%s/.NSPR-AFM-%d-%p.%d" "%s/.NSPR-AFM-%d-%p.%d"
489 genName = PR_smprintf( NSPR_AFM_FILENAME"%s/.NSPR-AFM-%d-%p.%d",
490 dirName, (int) pid, tid, incr );
491 if ( NULL((void*)0) == genName ) {
492 PR_LOG( _pr_shma_lm, PR_LOG_DEBUG,do { if (((_pr_shma_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("_md_OpenAnonFileMap(): PR_snprintf(): failed, generating filename"
); } } while (0)
493 ("_md_OpenAnonFileMap(): PR_snprintf(): failed, generating filename"))do { if (((_pr_shma_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("_md_OpenAnonFileMap(): PR_snprintf(): failed, generating filename"
); } } while (0);
494 goto Finished;
495 }
496
497 /* create the file */
498 osfd = open(genName, (O_CREAT0100 | O_EXCL0200 | O_RDWR02), mode);
499 if (-1 == osfd) {
500 if (EEXIST17 == errno(*__errno_location ())) {
501 PR_smprintf_free(genName);
502 continue; /* name exists, try again */
503 }
504 _PR_MD_MAP_OPEN_ERROR_MD_unix_map_open_error(errno(*__errno_location ()));
505 PR_LOG(do { if (((_pr_shma_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("_md_OpenAnonFileMap(): open(): failed, filename: %s, errno: %d"
, genName, PR_GetOSError()); } } while (0)
506 _pr_shma_lm,do { if (((_pr_shma_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("_md_OpenAnonFileMap(): open(): failed, filename: %s, errno: %d"
, genName, PR_GetOSError()); } } while (0)
507 PR_LOG_DEBUG,do { if (((_pr_shma_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("_md_OpenAnonFileMap(): open(): failed, filename: %s, errno: %d"
, genName, PR_GetOSError()); } } while (0)
508 ("_md_OpenAnonFileMap(): open(): failed, filename: %s, errno: %d",do { if (((_pr_shma_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("_md_OpenAnonFileMap(): open(): failed, filename: %s, errno: %d"
, genName, PR_GetOSError()); } } while (0)
509 genName,do { if (((_pr_shma_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("_md_OpenAnonFileMap(): open(): failed, filename: %s, errno: %d"
, genName, PR_GetOSError()); } } while (0)
510 PR_GetOSError()))do { if (((_pr_shma_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("_md_OpenAnonFileMap(): open(): failed, filename: %s, errno: %d"
, genName, PR_GetOSError()); } } while (0);
511 PR_smprintf_free(genName);
512 goto Finished;
513 }
514 break; /* name generation and open successful, break; */
515 } /* end for() */
516
517 if (incr == maxTries) {
518 PR_ASSERT(-1 == osfd)((-1 == osfd)?((void)0):PR_Assert("-1 == osfd","../../../../../pr/src/md/unix/uxshm.c"
,518));
519 PR_ASSERT(EEXIST == errno)((17 == (*__errno_location ()))?((void)0):PR_Assert("EEXIST == errno"
,"../../../../../pr/src/md/unix/uxshm.c",519));
520 _PR_MD_MAP_OPEN_ERROR_MD_unix_map_open_error(errno(*__errno_location ()));
521 goto Finished;
522 }
523
524 urc = unlink( genName );
525 if ( -1 == urc ) {
526 _PR_MD_MAP_UNLINK_ERROR_MD_unix_map_unlink_error( errno(*__errno_location ()) );
527 PR_LOG( _pr_shma_lm, PR_LOG_DEBUG,do { if (((_pr_shma_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("_md_OpenAnonFileMap(): failed on unlink(), errno: %d", (*__errno_location
())); } } while (0)
528 ("_md_OpenAnonFileMap(): failed on unlink(), errno: %d", errno))do { if (((_pr_shma_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("_md_OpenAnonFileMap(): failed on unlink(), errno: %d", (*__errno_location
())); } } while (0);
529 PR_smprintf_free( genName );
530 close( osfd );
531 goto Finished;
532 }
533 PR_LOG( _pr_shma_lm, PR_LOG_DEBUG,do { if (((_pr_shma_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("_md_OpenAnonFileMap(): unlink(): %s", genName ); } } while
(0)
534 ("_md_OpenAnonFileMap(): unlink(): %s", genName ))do { if (((_pr_shma_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("_md_OpenAnonFileMap(): unlink(): %s", genName ); } } while
(0);
535
536 PR_smprintf_free( genName );
537
538 fd = PR_ImportFile( osfd );
539 if ( NULL((void*)0) == fd ) {
540 PR_LOG( _pr_shma_lm, PR_LOG_DEBUG,do { if (((_pr_shma_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("_md_OpenAnonFileMap(): PR_ImportFile(): failed"); } } while
(0)
541 ("_md_OpenAnonFileMap(): PR_ImportFile(): failed"))do { if (((_pr_shma_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("_md_OpenAnonFileMap(): PR_ImportFile(): failed"); } } while
(0);
542 goto Finished;
543 }
544 PR_LOG( _pr_shma_lm, PR_LOG_DEBUG,do { if (((_pr_shma_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("_md_OpenAnonFileMap(): fd: %p", fd ); } } while (0)
545 ("_md_OpenAnonFileMap(): fd: %p", fd ))do { if (((_pr_shma_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("_md_OpenAnonFileMap(): fd: %p", fd ); } } while (0);
546
547 urc = ftruncate( fd->secret->md.osfd, size );
548 if ( -1 == urc ) {
549 _PR_MD_MAP_DEFAULT_ERROR_MD_unix_map_default_error( errno(*__errno_location ()) );
550 PR_LOG( _pr_shma_lm, PR_LOG_DEBUG,do { if (((_pr_shma_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("_md_OpenAnonFileMap(): failed on ftruncate(), errno: %d", (
*__errno_location ())); } } while (0)
551 ("_md_OpenAnonFileMap(): failed on ftruncate(), errno: %d", errno))do { if (((_pr_shma_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("_md_OpenAnonFileMap(): failed on ftruncate(), errno: %d", (
*__errno_location ())); } } while (0);
552 PR_Close( fd );
553 goto Finished;
554 }
555 PR_LOG( _pr_shma_lm, PR_LOG_DEBUG,do { if (((_pr_shma_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("_md_OpenAnonFileMap(): ftruncate(): size: %d", size ); } }
while (0)
556 ("_md_OpenAnonFileMap(): ftruncate(): size: %d", size ))do { if (((_pr_shma_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("_md_OpenAnonFileMap(): ftruncate(): size: %d", size ); } }
while (0);
557
558 LL_UI2L(size64, size)((size64) = (PRInt64)(size)); /* PRSize (size_t) is unsigned */
559 fm = PR_CreateFileMap( fd, size64, prot );
560 if ( NULL((void*)0) == fm ) {
561 PR_LOG( _pr_shma_lm, PR_LOG_DEBUG,do { if (((_pr_shma_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("PR_OpenAnonFileMap(): failed"); } } while (0)
562 ("PR_OpenAnonFileMap(): failed"))do { if (((_pr_shma_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("PR_OpenAnonFileMap(): failed"); } } while (0);
563 PR_Close( fd );
564 goto Finished;
565 }
566 fm->md.isAnonFM = PR_TRUE1; /* set fd close */
567
568 PR_LOG( _pr_shma_lm, PR_LOG_DEBUG,do { if (((_pr_shma_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("_md_OpenAnonFileMap(): PR_CreateFileMap(): fm: %p", fm ); }
} while (0)
569 ("_md_OpenAnonFileMap(): PR_CreateFileMap(): fm: %p", fm ))do { if (((_pr_shma_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("_md_OpenAnonFileMap(): PR_CreateFileMap(): fm: %p", fm ); }
} while (0);
570
571Finished:
572 return(fm);
573} /* end md_OpenAnonFileMap() */
574
575/*
576** _md_ExportFileMapAsString()
577**
578**
579*/
580extern PRStatus _md_ExportFileMapAsString(
581 PRFileMap *fm,
582 PRSize bufSize,
583 char *buf
584)
585{
586 PRIntn written;
587 PRIntn prot = (PRIntn)fm->prot;
588
589 written = PR_snprintf( buf, bufSize, "%ld:%d",
590 fm->fd->secret->md.osfd, prot );
591
592 return((written == -1)? PR_FAILURE : PR_SUCCESS);
593} /* end _md_ExportFileMapAsString() */
594
595
596extern PRFileMap * _md_ImportFileMapFromString(
597 const char *fmstring
598)
599{
600 PRStatus rc;
601 PRInt32 osfd;
602 PRIntn prot; /* really: a PRFileMapProtect */
603 PRFileDesc *fd;
604 PRFileMap *fm = NULL((void*)0); /* default return value */
605 PRFileInfo64 info;
606
607 PR_sscanf( fmstring, "%ld:%d", &osfd, &prot );
608
609 /* import the os file descriptor */
610 fd = PR_ImportFile( osfd );
611 if ( NULL((void*)0) == fd ) {
612 PR_LOG( _pr_shma_lm, PR_LOG_DEBUG,do { if (((_pr_shma_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("_md_ImportFileMapFromString(): PR_ImportFile() failed"); }
} while (0)
613 ("_md_ImportFileMapFromString(): PR_ImportFile() failed"))do { if (((_pr_shma_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("_md_ImportFileMapFromString(): PR_ImportFile() failed"); }
} while (0);
614 goto Finished;
615 }
616
617 rc = PR_GetOpenFileInfo64( fd, &info );
618 if ( PR_FAILURE == rc ) {
619 PR_LOG( _pr_shma_lm, PR_LOG_DEBUG,do { if (((_pr_shma_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("_md_ImportFileMapFromString(): PR_GetOpenFileInfo64() failed"
); } } while (0)
620 ("_md_ImportFileMapFromString(): PR_GetOpenFileInfo64() failed"))do { if (((_pr_shma_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("_md_ImportFileMapFromString(): PR_GetOpenFileInfo64() failed"
); } } while (0);
621 goto Finished;
622 }
623
624 fm = PR_CreateFileMap( fd, info.size, (PRFileMapProtect)prot );
625 if ( NULL((void*)0) == fm ) {
626 PR_LOG( _pr_shma_lm, PR_LOG_DEBUG,do { if (((_pr_shma_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("_md_ImportFileMapFromString(): PR_CreateFileMap() failed")
; } } while (0)
627 ("_md_ImportFileMapFromString(): PR_CreateFileMap() failed"))do { if (((_pr_shma_lm)->level >= (PR_LOG_DEBUG))) { PR_LogPrint
("_md_ImportFileMapFromString(): PR_CreateFileMap() failed")
; } } while (0);
628 }
629
630Finished:
631 return(fm);
632} /* end _md_ImportFileMapFromString() */