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chromium / external / github.com / sqlite / sqlite / HEAD / . / src / test_delete.c
blob: 3f34a72c46b64dc8d4e8775446fb6d83e48dec1a [file] [log] [blame]
dan000f95b2016-09-09 20:00:40[diff] [blame]1/*
2** 2016 September 10
3**
4** The author disclaims copyright to this source code. In place of
5** a legal notice, here is a blessing:
6**
7** May you do good and not evil.
8** May you find forgiveness for yourself and forgive others.
9** May you share freely, never taking more than you give.
10**
11*************************************************************************
12** This file contains test code to delete an SQLite database and all
13** of its associated files. Associated files include:
14**
15** * The journal file.
16** * The wal file.
17** * The SQLITE_ENABLE_8_3_NAMES version of the db, journal or wal files.
18** * Files created by the test_multiplex.c module to extend any of the
19** above.
20*/
21
dan44ae27a2017-04-13 15:36:47[diff] [blame]22#ifndef SQLITE_OS_WIN
mistachkin35cd8b12016-09-09 20:26:27[diff] [blame]23# include <unistd.h>
dan44ae27a2017-04-13 15:36:47[diff] [blame]24# include <errno.h>
mistachkin35cd8b12016-09-09 20:26:27[diff] [blame]25#endif
dan000f95b2016-09-09 20:00:40[diff] [blame]26#include <string.h>
dan44ae27a2017-04-13 15:36:47[diff] [blame]27#include <assert.h>
dan000f95b2016-09-09 20:00:40[diff] [blame]28#include "sqlite3.h"
29
30/* The following #defines are copied from test_multiplex.c */
31#ifndef MX_CHUNK_NUMBER
32# define MX_CHUNK_NUMBER 299
33#endif
34#ifndef SQLITE_MULTIPLEX_JOURNAL_8_3_OFFSET
35# define SQLITE_MULTIPLEX_JOURNAL_8_3_OFFSET 400
36#endif
37#ifndef SQLITE_MULTIPLEX_WAL_8_3_OFFSET
38# define SQLITE_MULTIPLEX_WAL_8_3_OFFSET 700
39#endif
40
41/*
42** This routine is a copy of (most of) the code from SQLite function
43** sqlite3FileSuffix3(). It modifies the filename in buffer z in the
44** same way as SQLite does when in 8.3 filenames mode.
45*/
46static void sqlite3Delete83Name(char *z){
47 int i, sz;
drh48c286f2016-11-11 20:37:27[diff] [blame]48 sz = (int)strlen(z);
dan000f95b2016-09-09 20:00:40[diff] [blame]49 for(i=sz-1; i>0 && z[i]!='/' && z[i]!='.'; i--){}
50 if( z[i]=='.' && (sz>i+4) ) memmove(&z[i+1], &z[sz-3], 4);
51}
52
53/*
54** zFile is a filename. Assuming no error occurs, if this file exists,
55** set *pbExists to true and unlink it. Or, if the file does not exist,
56** set *pbExists to false before returning.
57**
dan44ae27a2017-04-13 15:36:47[diff] [blame]58** If an error occurs, non-zero is returned. Or, if no error occurs, zero.
dan000f95b2016-09-09 20:00:40[diff] [blame]59*/
dan44ae27a2017-04-13 15:36:47[diff] [blame]60static int sqlite3DeleteUnlinkIfExists(
61 sqlite3_vfs *pVfs,
62 const char *zFile,
63 int *pbExists
64){
65 int rc = SQLITE_ERROR;
jan.nijtmanseb264402025-03-27 14:13:12[diff] [blame]66#ifdef _WIN32
dan44ae27a2017-04-13 15:36:47[diff] [blame]67 if( pVfs ){
68 if( pbExists ) *pbExists = 1;
69 rc = pVfs->xDelete(pVfs, zFile, 0);
70 if( rc==SQLITE_IOERR_DELETE_NOENT ){
71 if( pbExists ) *pbExists = 0;
72 rc = SQLITE_OK;
73 }
74 }
75#else
76 assert( pVfs==0 );
dan000f95b2016-09-09 20:00:40[diff] [blame]77 rc = access(zFile, F_OK);
78 if( rc ){
79 if( errno==ENOENT ){
80 if( pbExists ) *pbExists = 0;
dan44ae27a2017-04-13 15:36:47[diff] [blame]81 rc = SQLITE_OK;
dan000f95b2016-09-09 20:00:40[diff] [blame]82 }
dan44ae27a2017-04-13 15:36:47[diff] [blame]83 }else{
84 if( pbExists ) *pbExists = 1;
85 rc = unlink(zFile);
dan000f95b2016-09-09 20:00:40[diff] [blame]86 }
dan44ae27a2017-04-13 15:36:47[diff] [blame]87#endif
88 return rc;
dan000f95b2016-09-09 20:00:40[diff] [blame]89}
90
91/*
92** Delete the database file identified by the string argument passed to this
93** function. The string must contain a filename, not an SQLite URI.
94*/
dand0a53712017-04-13 15:51:27[diff] [blame]95SQLITE_API int sqlite3_delete_database(
dan000f95b2016-09-09 20:00:40[diff] [blame]96 const char *zFile /* File to delete */
97){
98 char *zBuf; /* Buffer to sprintf() filenames to */
99 int nBuf; /* Size of buffer in bytes */
mistachkin35cd8b12016-09-09 20:26:27[diff] [blame]100 int rc = 0; /* System error code */
dan000f95b2016-09-09 20:00:40[diff] [blame]101 int i; /* Iterate through azFmt[] and aMFile[] */
102
103 const char *azFmt[] = { "%s", "%s-journal", "%s-wal", "%s-shm" };
104
105 struct MFile {
106 const char *zFmt;
107 int iOffset;
108 int b83;
109 } aMFile[] = {
110 { "%s%03d", 0, 0 },
111 { "%s-journal%03d", 0, 0 },
112 { "%s-wal%03d", 0, 0 },
113 { "%s%03d", 0, 1 },
114 { "%s-journal%03d", SQLITE_MULTIPLEX_JOURNAL_8_3_OFFSET, 1 },
115 { "%s-wal%03d", SQLITE_MULTIPLEX_WAL_8_3_OFFSET, 1 },
116 };
117
jan.nijtmanseb264402025-03-27 14:13:12[diff] [blame]118#ifdef _WIN32
dan44ae27a2017-04-13 15:36:47[diff] [blame]119 sqlite3_vfs *pVfs = sqlite3_vfs_find("win32");
120#else
121 sqlite3_vfs *pVfs = 0;
122#endif
123
dan000f95b2016-09-09 20:00:40[diff] [blame]124 /* Allocate a buffer large enough for any of the files that need to be
125 ** deleted. */
drh48c286f2016-11-11 20:37:27[diff] [blame]126 nBuf = (int)strlen(zFile) + 100;
dan000f95b2016-09-09 20:00:40[diff] [blame]127 zBuf = (char*)sqlite3_malloc(nBuf);
128 if( zBuf==0 ) return SQLITE_NOMEM;
129
130 /* Delete both the regular and 8.3 filenames versions of the database,
131 ** journal, wal and shm files. */
132 for(i=0; rc==0 && i<sizeof(azFmt)/sizeof(azFmt[0]); i++){
133 sqlite3_snprintf(nBuf, zBuf, azFmt[i], zFile);
dan44ae27a2017-04-13 15:36:47[diff] [blame]134 rc = sqlite3DeleteUnlinkIfExists(pVfs, zBuf, 0);
dan000f95b2016-09-09 20:00:40[diff] [blame]135 if( rc==0 && i!=0 ){
136 sqlite3Delete83Name(zBuf);
dan44ae27a2017-04-13 15:36:47[diff] [blame]137 rc = sqlite3DeleteUnlinkIfExists(pVfs, zBuf, 0);
dan000f95b2016-09-09 20:00:40[diff] [blame]138 }
139 }
140
141 /* Delete any multiplexor files */
142 for(i=0; rc==0 && i<sizeof(aMFile)/sizeof(aMFile[0]); i++){
143 struct MFile *p = &aMFile[i];
144 int iChunk;
145 for(iChunk=1; iChunk<=MX_CHUNK_NUMBER; iChunk++){
146 int bExists;
147 sqlite3_snprintf(nBuf, zBuf, p->zFmt, zFile, iChunk+p->iOffset);
148 if( p->b83 ) sqlite3Delete83Name(zBuf);
dan44ae27a2017-04-13 15:36:47[diff] [blame]149 rc = sqlite3DeleteUnlinkIfExists(pVfs, zBuf, &bExists);
dan000f95b2016-09-09 20:00:40[diff] [blame]150 if( bExists==0 || rc!=0 ) break;
151 }
152 }
153
154 sqlite3_free(zBuf);
155 return (rc ? SQLITE_ERROR : SQLITE_OK);
156}