On unix, try to create the *-wal and *-shm files with the same permissions as the associated database file.

FossilOrigin-Name: e5d180eed245437b61bfb257ee01e2571c93afe7

manifest

@@ -1,5 +1,5 @@
-C Add\stests\sto\spagerfault.test.
+C On\sunix,\stry\sto\screate\sthe\s*-wal\sand\s*-shm\sfiles\swith\sthe\ssame\spermissions\sas\sthe\sassociated\sdatabase\sfile.
-D 2010-07-14T08:20:36
+D 2010-07-14T14:48:58
 F Makefile.arm-wince-mingw32ce-gcc fcd5e9cd67fe88836360bb4f9ef4cb7f8e2fb5a0
 F Makefile.in ec08dc838fd8110fe24c92e5130bcd91cbb1ff2e
 F Makefile.linux-gcc d53183f4aa6a9192d249731c90dbdffbd2c68654
@@ -150,11 +150,11 @@ F src/mutex_os2.c 6a62583e374ba3ac1a3fcc0da2bfdac7d3942689
 F src/mutex_unix.c cf84466b4fdd2baa0d5a10bb19f08b2abc1ce42e
 F src/mutex_w32.c 1fe0e735897be20e09dd6f53c3fb516c6b48c0eb
 F src/notify.c cbfa66a836da3a51567209636e6a94059c137930
-F src/os.c a0ecbd198b92e60a3e3b8887a668df3f80b4f62f
+F src/os.c 60178f518c4d6c0dcb59f7292232281d7bea2dcf
 F src/os.h 9dbed8c2b9c1f2f2ebabc09e49829d4777c26bf9
 F src/os_common.h a8f95b81eca8a1ab8593d23e94f8a35f35d4078f
 F src/os_os2.c 665876d5eec7585226b0a1cf5e18098de2b2da19
-F src/os_unix.c cfcb63d4aadadd75ef89c41563bf15332eef4e4e
+F src/os_unix.c 417a378a1941b9203d2613c082133fee85199f74
 F src/os_win.c 61734aad7f50b28f3c76eb4b19b63472f6d825d9
 F src/pager.c 78ca1e1f3315c8227431c403c04d791dccf242fb
 F src/pager.h 879fdde5a102d2f21a3135d6f647530b21c2796c
@@ -170,7 +170,7 @@ F src/resolve.c 1c0f32b64f8e3f555fe1f732f9d6f501a7f05706
 F src/rowset.c 69afa95a97c524ba6faf3805e717b5b7ae85a697
 F src/select.c 4903ff1bbd08b55cbce00ea43c645530de41b362
 F src/shell.c fd4ccdb37c3b68de0623eb938a649e0990710714
-F src/sqlite.h.in 1bcca411e266054977ed2b149a242c5a71092904
+F src/sqlite.h.in c394e27c259dff2de8b5939ecddd30262eb901ad
 F src/sqlite3ext.h 69dfb8116af51b84a029cddb3b35062354270c89
 F src/sqliteInt.h 8e3bc49a0e9217ff489a6b8f70cfcba0f5ad7437
 F src/sqliteLimit.h 196e2f83c3b444c4548fc1874f52f84fdbda40f3
@@ -227,7 +227,7 @@ F src/vdbeblob.c 258a6010ba7a82b72b327fb24c55790655689256
 F src/vdbemem.c 5e579abf6532001dfbee0e640dc34eae897a9807
 F src/vdbetrace.c 864cef96919323482ebd9986f2132435115e9cc2
 F src/vtab.c a0f8a40274e4261696ef57aa806de2776ab72cda
-F src/wal.c 7dce9040d5ba6c575f337b298fce1a9c04eb2296
+F src/wal.c 60932f29302b978a5eb4c637dbbc2db1d70a536f
 F src/wal.h 906c85760598b18584921fe08008435aa4eeeeb2
 F src/walker.c 3112bb3afe1d85dc52317cb1d752055e9a781f8f
 F src/where.c 926c83c6394e132a1c62b6b12ceeba7d55a34c19
@@ -776,7 +776,7 @@ F test/vtab_alter.test 9e374885248f69e251bdaacf480b04a197f125e5
 F test/vtab_err.test 0d4d8eb4def1d053ac7c5050df3024fd47a3fbd8
 F test/vtab_shared.test 0eff9ce4f19facbe0a3e693f6c14b80711a4222d
 F test/wal.test 1891e6f72dd437a1c2a48091aa9182ba17a8f780
-F test/wal2.test 85775a7f68013f8734da8f5131c108e29cdbe868
+F test/wal2.test b26d04c36361a3dd99b9c5a43658f12e0d197c70
 F test/wal3.test d2ae7e66f973bd6b58ce49e546b2c00f44fe0485
 F test/wal4.test 640be93f5422df37203aa5e7c06b24fb5e4a2439
 F test/wal_common.tcl 895d76138043b86bdccf36494054bdabcf65837b
@@ -834,7 +834,7 @@ F tool/speedtest2.tcl ee2149167303ba8e95af97873c575c3e0fab58ff
 F tool/speedtest8.c 2902c46588c40b55661e471d7a86e4dd71a18224
 F tool/speedtest8inst1.c 293327bc76823f473684d589a8160bde1f52c14e
 F tool/vdbe-compress.tcl d70ea6d8a19e3571d7ab8c9b75cba86d1173ff0f
-P c73886ed7497c0daf798c3b02ca6f5a1c2addde3
+P b092f2a74bdc77c1f90ad3b4448cb68a891ecf63
-R 2b6e3a3412f1bfeb09d6b6b4e98d2ecb
+R c3e2391a3a0460d3db8727396fae83c1
 U dan
-Z 5807910238b38b6913c9b3401b1c1e56
+Z 33764ba68244566e69f565fd4aced7cc

manifest.uuid

@@ -1 +1 @@
-b092f2a74bdc77c1f90ad3b4448cb68a891ecf63
+e5d180eed245437b61bfb257ee01e2571c93afe7

src/os.c

@@ -132,11 +132,11 @@ int sqlite3OsOpen(
 ){
   int rc;
   DO_OS_MALLOC_TEST(0);
-  /* 0x7f3f is a mask of SQLITE_OPEN_ flags that are valid to be passed
+  /* 0x87f3f is a mask of SQLITE_OPEN_ flags that are valid to be passed
   ** down into the VFS layer.  Some SQLITE_OPEN_ flags (for example,
   ** SQLITE_OPEN_FULLMUTEX or SQLITE_OPEN_SHAREDCACHE) are blocked before
   ** reaching the VFS. */
-  rc = pVfs->xOpen(pVfs, zPath, pFile, flags & 0x7f3f, pFlagsOut);
+  rc = pVfs->xOpen(pVfs, zPath, pFile, flags & 0x87f3f, pFlagsOut);
   assert( rc==SQLITE_OK || pFile->pMethods==0 );
   return rc;
 }

src/os_unix.c

@@ -3315,6 +3315,18 @@ static int unixOpenSharedMemory(unixFile *pDbFd){
   pInode = pDbFd->pInode;
   pShmNode = pInode->pShmNode;
   if( pShmNode==0 ){
+    struct stat sStat;                 /* fstat() info for database file */
+
+    /* Call fstat() to figure out the permissions on the database file. If
+    ** a new *-shm file is created, an attempt will be made to create it
+    ** with the same permissions. The actual permissions the file is created
+    ** with are subject to the current umask setting.
+    */
+    if( fstat(pDbFd->h, &sStat) ){
+      rc = SQLITE_IOERR_FSTAT;
+      goto shm_open_err;
+    }
+
     nShmFilename = 5 + (int)strlen(pDbFd->zPath);
     pShmNode = sqlite3_malloc( sizeof(*pShmNode) + nShmFilename );
     if( pShmNode==0 ){
@@ -3333,7 +3345,7 @@ static int unixOpenSharedMemory(unixFile *pDbFd){
       goto shm_open_err;
     }
 
-    pShmNode->h = open(zShmFilename, O_RDWR|O_CREAT, 0664);
+    pShmNode->h = open(zShmFilename, O_RDWR|O_CREAT, (sStat.st_mode & 0777));
     if( pShmNode->h<0 ){
       rc = SQLITE_CANTOPEN_BKPT;
       goto shm_open_err;
@@ -4290,6 +4302,50 @@ static UnixUnusedFd *findReusableFd(const char *zPath, int flags){
   return pUnused;
 }
 
+/*
+** This function is called by unixOpen() to determine the unix permissions
+** to create new files with. If no error occurs, then SQLite is returned
+** and a value suitable for passing as the third argument to open(2) is
+** written to *pMode. If an IO error occurs, an SQLite error code is 
+** returned and the value of *pMode is not modified.
+**
+** If the file being opened is a temporary file, it is always created with
+** the octal permissions 0600 (read/writable by owner only). If the file
+** is a database, journal or master journal file, it is created with the
+** permissions mask SQLITE_DEFAULT_FILE_PERMISSIONS.
+**
+** Finally, if the file being opened is a WAL file, then this function
+** queries the file-system for the permissions on the corresponding database
+** file and sets *pMode to this value. Whenever possible, WAL files are 
+** created using the same permissions as the associated database file.
+*/
+static int findCreateFileMode(
+  const char *zPath,              /* Path of file (possibly) being created */
+  int flags,                      /* Flags passed as 4th argument to xOpen() */
+  mode_t *pMode                   /* OUT: Permissions to open file with */
+){
+  int rc = SQLITE_OK;             /* Return Code */
+  if( flags & SQLITE_OPEN_WAL ){
+    char zDb[MAX_PATHNAME+1];     /* Database file path */
+    int nDb;                      /* Number of valid bytes in zDb */
+    struct stat sStat;            /* Output of stat() on database file */
+
+    nDb = sqlite3Strlen30(zPath) - 4;
+    memcpy(zDb, zPath, nDb);
+    zDb[nDb] = '\0';
+    if( 0==stat(zDb, &sStat) ){
+      *pMode = sStat.st_mode & 0777;
+    }else{
+      rc = SQLITE_IOERR_FSTAT;
+    }
+  }else if( flags & SQLITE_OPEN_DELETEONCLOSE ){
+    *pMode = 0600;
+  }else{
+    *pMode = SQLITE_DEFAULT_FILE_PERMISSIONS;
+  }
+  return rc;
+}
+
 /*
 ** Open the file zPath.
 ** 
@@ -4340,9 +4396,11 @@ static int unixOpen(
   ** a file-descriptor on the directory too. The first time unixSync()
   ** is called the directory file descriptor will be fsync()ed and close()d.
   */
-  int isOpenDirectory = (isCreate && 
+  int isOpenDirectory = (isCreate && (
-      (eType==SQLITE_OPEN_MASTER_JOURNAL || eType==SQLITE_OPEN_MAIN_JOURNAL)
+        eType==SQLITE_OPEN_MASTER_JOURNAL 
-  );
+     || eType==SQLITE_OPEN_MAIN_JOURNAL 
+     || eType==SQLITE_OPEN_WAL
+  ));
 
   /* If argument zPath is a NULL pointer, this function is required to open
   ** a temporary file. Use this buffer to store the file name in.
@@ -4362,17 +4420,18 @@ static int unixOpen(
   assert(isExclusive==0 || isCreate);
   assert(isDelete==0 || isCreate);
 
-  /* The main DB, main journal, and master journal are never automatically
+  /* The main DB, main journal, WAL file and master journal are never 
-  ** deleted. Nor are they ever temporary files.  */
+  ** automatically deleted. Nor are they ever temporary files.  */
   assert( (!isDelete && zName) || eType!=SQLITE_OPEN_MAIN_DB );
   assert( (!isDelete && zName) || eType!=SQLITE_OPEN_MAIN_JOURNAL );
   assert( (!isDelete && zName) || eType!=SQLITE_OPEN_MASTER_JOURNAL );
+  assert( (!isDelete && zName) || eType!=SQLITE_OPEN_WAL );
 
   /* Assert that the upper layer has set one of the "file-type" flags. */
   assert( eType==SQLITE_OPEN_MAIN_DB      || eType==SQLITE_OPEN_TEMP_DB 
        || eType==SQLITE_OPEN_MAIN_JOURNAL || eType==SQLITE_OPEN_TEMP_JOURNAL 
        || eType==SQLITE_OPEN_SUBJOURNAL   || eType==SQLITE_OPEN_MASTER_JOURNAL 
-       || eType==SQLITE_OPEN_TRANSIENT_DB
+       || eType==SQLITE_OPEN_TRANSIENT_DB || eType==SQLITE_OPEN_WAL
   );
 
   memset(p, 0, sizeof(unixFile));
@@ -4410,7 +4469,12 @@ static int unixOpen(
   openFlags |= (O_LARGEFILE|O_BINARY);
 
   if( fd<0 ){
-    mode_t openMode = (isDelete?0600:SQLITE_DEFAULT_FILE_PERMISSIONS);
+    mode_t openMode;              /* Permissions to create file with */
+    rc = findCreateFileMode(zName, flags, &openMode);
+    if( rc!=SQLITE_OK ){
+      assert( !p->pUnused );
+      return rc;
+    }
     fd = open(zName, openFlags, openMode);
     OSTRACE(("OPENX   %-3d %s 0%o\n", fd, zName, openFlags));
     if( fd<0 && errno!=EISDIR && isReadWrite && !isExclusive ){

src/sqlite.h.in

@@ -476,6 +476,7 @@ int sqlite3_exec(
 #define SQLITE_OPEN_FULLMUTEX        0x00010000  /* Ok for sqlite3_open_v2() */
 #define SQLITE_OPEN_SHAREDCACHE      0x00020000  /* Ok for sqlite3_open_v2() */
 #define SQLITE_OPEN_PRIVATECACHE     0x00040000  /* Ok for sqlite3_open_v2() */
+#define SQLITE_OPEN_WAL              0x00080000  /* VFS only */
 
 /*
 ** CAPI3REF: Device Characteristics

src/wal.c

@@ -1224,7 +1224,7 @@ int sqlite3WalOpen(
   pRet->zWalName = zWalName;
 
   /* Open file handle on the write-ahead log file. */
-  flags = (SQLITE_OPEN_READWRITE|SQLITE_OPEN_CREATE|SQLITE_OPEN_MAIN_JOURNAL);
+  flags = (SQLITE_OPEN_READWRITE|SQLITE_OPEN_CREATE|SQLITE_OPEN_WAL);
   rc = sqlite3OsOpen(pVfs, zWalName, pRet->pWalFd, flags, &flags);
 
   if( rc!=SQLITE_OK ){

test/wal2.test

@@ -998,5 +998,53 @@ db close
 db2 close
 tvfs delete
 
+#-------------------------------------------------------------------------
+# If a connection is required to create a WAL or SHM file, it creates 
+# the new files with the same file-system permissions as the database 
+# file itself. Test this.
+#
+if {$::tcl_platform(platform) == "unix"} {
+  faultsim_delete_and_reopen
+
+  set umask [exec /bin/sh -c umask]
+  do_test wal2-12.1 {
+    sqlite3 db test.db
+    execsql { 
+      CREATE TABLE tx(y, z);
+      PRAGMA journal_mode = WAL;
+    }
+    db close
+    list [file exists test.db-wal] [file exists test.db-shm]
+  } {0 0}
+  
+  foreach {tn permissions} {
+   1 00644
+   2 00666
+   3 00600
+   4 00755
+  } {
+    set effective [format %.5o [expr $permissions & ~$umask]]
+    do_test wal2-12.2.$tn.1 {
+      file attributes test.db -permissions $permissions
+      file attributes test.db -permissions
+    } $permissions
+    do_test wal2-12.2.$tn.2 {
+      list [file exists test.db-wal] [file exists test.db-shm]
+    } {0 0}
+    do_test wal2-12.2.$tn.3 {
+      sqlite3 db test.db
+      execsql { INSERT INTO tx DEFAULT VALUES }
+      list [file exists test.db-wal] [file exists test.db-shm]
+    } {1 1}
+    do_test wal2-12.2.$tn.4 {
+      list [file attr test.db-wal -perm] [file attr test.db-shm -perm]
+    } [list $effective $effective]
+    do_test wal2-12.2.$tn.5 {
+      db close
+      list [file exists test.db-wal] [file exists test.db-shm]
+    } {0 0}
+  }
+}
+
 finish_test