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Add code to detect if the database file is moved or deleted out from under

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SQLite and return an SQLITE_IOERR_NODB.

FossilOrigin-Name: 8759a8e4d83b163e315eff316cf163f6ea42f2bb
This commit is contained in:
drh
2013-12-06 15:37:35 +00:00
parent 6f04b95f02
commit 1b1f30bb5e
7 changed files with 84 additions and 15 deletions
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6
src/sqlite.h.in
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@@ -475,6 +475,7 @@ int sqlite3_exec(
#define SQLITE_IOERR_MMAP (SQLITE_IOERR | (24<<8))
#define SQLITE_IOERR_GETTEMPPATH (SQLITE_IOERR | (25<<8))
#define SQLITE_IOERR_CONVPATH (SQLITE_IOERR | (26<<8))
#define SQLITE_IOERR_NODB (SQLITE_IOERR | (27<<8))
#define SQLITE_LOCKED_SHAREDCACHE (SQLITE_LOCKED | (1<<8))
#define SQLITE_BUSY_RECOVERY (SQLITE_BUSY | (1<<8))
#define SQLITE_BUSY_SNAPSHOT (SQLITE_BUSY | (2<<8))
@@ -553,7 +554,9 @@ int sqlite3_exec(
** after reboot following a crash or power loss, the only bytes in a
** file that were written at the application level might have changed
** and that adjacent bytes, even bytes within the same sector are
** guaranteed to be unchanged.
** guaranteed to be unchanged. The SQLITE_IOCAP_UNDELETABLE_WHEN_OPEN
** and SQLITE_IOCAP_UNMOVABLE_WHEN_OPEN flags indicate that a file
** cannot be deleted or renamed when open, respectively.
*/
#define SQLITE_IOCAP_ATOMIC 0x00000001
#define SQLITE_IOCAP_ATOMIC512 0x00000002
@@ -568,6 +571,7 @@ int sqlite3_exec(
#define SQLITE_IOCAP_SEQUENTIAL 0x00000400
#define SQLITE_IOCAP_UNDELETABLE_WHEN_OPEN 0x00000800
#define SQLITE_IOCAP_POWERSAFE_OVERWRITE 0x00001000
#define SQLITE_IOCAP_UNMOVABLE_WHEN_OPEN 0x00002000
/*
** CAPI3REF: File Locking Levels