SQLite Archiver (Windows)
Check-in [a394ea2f57]
Not logged in

Many hyperlinks are disabled.
Use anonymous login to enable hyperlinks.

Overview
SHA1:a394ea2f57ac4507f435de554b34a42824233eb0
Date: 2014-06-13 17:57:18
User: drh
Comment:First attempt at code for a FuseFS on an SQLite archive. Compiles, but does not work quite right. Added -Wall and -Werror to the makefile.
Tags And Properties
Context
2014-06-13 17:59
[5766e8f04e] Add a "clean" target to the Makefile. (user: drh, tags: trunk)
2014-06-13 17:57
[a394ea2f57] First attempt at code for a FuseFS on an SQLite archive. Compiles, but does not work quite right. Added -Wall and -Werror to the makefile. (user: drh, tags: trunk)
2014-06-13 17:16
[50d50f29fd] Change the name of the table in the database to "sqlar". (user: drh, tags: trunk)
Changes
Hide Diffs Unified Diffs Ignore Whitespace Patch

Changes to Makefile.

1
2
3
4

5
6
7
8
9
10
11
12



13
14
#!/bin/make

CC = gcc -g -I.
ZLIB = -lz

SQLITE_OPT = -DSQLITE_THREADSAFE=0 -DSQLITE_OMIT_LOAD_EXTENSION

all: sqlar
	

sqlar:	sqlar.c sqlite3.o
	$(CC) -o sqlar sqlar.c sqlite3.o $(ZLIB)




sqlite3.o:	sqlite3.c sqlite3.h
	$(CC) -c sqlite3.c $(SQLITE_OPT) sqlite3.c


|

>








>
>
>


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
#!/bin/make

CC = gcc -g -I. -D_FILE_OFFSET_BITS=64 -Wall -Werror
ZLIB = -lz
FUSELIB = -lfuse
SQLITE_OPT = -DSQLITE_THREADSAFE=0 -DSQLITE_OMIT_LOAD_EXTENSION

all: sqlar
	

sqlar:	sqlar.c sqlite3.o
	$(CC) -o sqlar sqlar.c sqlite3.o $(ZLIB)

sqlarfs:	sqlarfs.c sqlite3.o
	$(CC) -o sqlarfs sqlarfs.c sqlite3.o $(ZLIB) $(FUSELIB)

sqlite3.o:	sqlite3.c sqlite3.h
	$(CC) -c sqlite3.c $(SQLITE_OPT) sqlite3.c

Changes to sqlar.c.

17
18
19
20
21
22
23

24
25
26
27
28
29
30
...
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
...
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
...
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
...
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
...
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
...
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
#include <stdarg.h>
#include <stdlib.h>
#include <zlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <dirent.h>


/*
** Show a help message and quit.
*/
static void showHelp(const char *argv0){
  fprintf(stderr, "Usage: %s [options] archive [files...]\n", argv0);
  fprintf(stderr, "Options:\n"
................................................................................
  if( noCompress ){
    *pSizeOrig = *pSizeCompr = nIn;
    return zIn;
  }
  nCompr = 13 + nIn + (nIn+999)/1000;
  zCompr = sqlite3_malloc( nCompr+1 );
  if( zCompr==0 ) errorMsg("cannot malloc for %d bytes\n", nCompr+1);
  rc = compress(zCompr, &nCompr, zIn, nIn);
  if( rc!=Z_OK ) errorMsg("Cannot compress %s\n", zFilename);
  if( nIn>nCompr ){
    sqlite3_free(zIn);
    *pSizeOrig = nIn;
    *pSizeCompr = (int)nCompr;
    return zCompr;
  }else{
................................................................................
    if( sz>0 && fwrite(pCompr, sz, 1, out)!=1 ){
      errorMsg("failed to write: %s\n", zFilename);
    }
  }else{
    pOut = sqlite3_malloc( sz+1 );
    if( pOut==0 ) errorMsg("cannot allocate %d bytes\n", sz+1);
    nOut = sz;
    rc = uncompress(pOut, &nOut, pCompr, nCompr);
    if( rc!=Z_OK ) errorMsg("uncompress failed for %s\n", zFilename);
    if( nOut>0 && fwrite(pOut, nOut, 1, out)!=1 ){
      errorMsg("failed to write: %s\n", zFilename);
    }
    sqlite3_free(pOut);
  }
  fclose(out);
................................................................................
static void add_file(
  const char *zFilename,     /* Name of file to add */
  int verboseFlag,           /* If true, show each file added */
  int noCompress             /* If true, always omit compression */
){
  int rc;
  struct stat x;
  char *zContent;
  int szOrig;
  int szCompr;
  const char *zName;

  check_filename(zFilename);
  rc = stat(zFilename, &x);
  if( rc ) errorMsg("no such file or directory: %s\n", zFilename);
................................................................................
    char *zSubpath;
    d = opendir(zFilename);
    if( d ){
      while( (pEntry = readdir(d))!=0 ){
        if( strcmp(pEntry->d_name,".")==0 || strcmp(pEntry->d_name,"..")==0 ){
          continue;
        }
        char *zSubpath = sqlite3_mprintf("%s/%s", zFilename, pEntry->d_name);
        add_file(zSubpath, verboseFlag, noCompress);
        sqlite3_free(zSubpath);
      }
    }
  }
}

................................................................................
      azFiles = &argv[i];
      nFiles = argc - i;
      break;
    }
  }
  if( zArchive==0 ) showHelp(argv[0]);
  if( listFlag ){
    int rc;
    db_open(zArchive, 0);
    if( verboseFlag ){
      db_prepare(
          "SELECT name, sz, length(data), mode, datetime(mtime,'unixepoch')"
          " FROM sqlar ORDER BY name"
      );
      while( sqlite3_step(pStmt)==SQLITE_ROW ){
................................................................................
      while( sqlite3_step(pStmt)==SQLITE_ROW ){
        printf("%s\n", sqlite3_column_text(pStmt,0));
      }
    }
    db_close(1);
  }else if( extractFlag ){
    const char *zSql;
    int rc;
    db_open(zArchive, 0);
    if( nFiles ){
      NameList x;
      x.azName = azFiles;
      x.nName = nFiles;
      sqlite3_create_function(db, "name_on_list", 1, SQLITE_UTF8,
                              (char*)&x, name_on_list, 0, 0);







>







 







|







 







|







 







<







 







|







 







<







 







<







17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
...
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
...
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
...
266
267
268
269
270
271
272

273
274
275
276
277
278
279
...
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
...
393
394
395
396
397
398
399

400
401
402
403
404
405
406
...
418
419
420
421
422
423
424

425
426
427
428
429
430
431
#include <stdarg.h>
#include <stdlib.h>
#include <zlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <dirent.h>
#include <string.h>

/*
** Show a help message and quit.
*/
static void showHelp(const char *argv0){
  fprintf(stderr, "Usage: %s [options] archive [files...]\n", argv0);
  fprintf(stderr, "Options:\n"
................................................................................
  if( noCompress ){
    *pSizeOrig = *pSizeCompr = nIn;
    return zIn;
  }
  nCompr = 13 + nIn + (nIn+999)/1000;
  zCompr = sqlite3_malloc( nCompr+1 );
  if( zCompr==0 ) errorMsg("cannot malloc for %d bytes\n", nCompr+1);
  rc = compress((Bytef*)zCompr, &nCompr, (const Bytef*)zIn, nIn);
  if( rc!=Z_OK ) errorMsg("Cannot compress %s\n", zFilename);
  if( nIn>nCompr ){
    sqlite3_free(zIn);
    *pSizeOrig = nIn;
    *pSizeCompr = (int)nCompr;
    return zCompr;
  }else{
................................................................................
    if( sz>0 && fwrite(pCompr, sz, 1, out)!=1 ){
      errorMsg("failed to write: %s\n", zFilename);
    }
  }else{
    pOut = sqlite3_malloc( sz+1 );
    if( pOut==0 ) errorMsg("cannot allocate %d bytes\n", sz+1);
    nOut = sz;
    rc = uncompress((Bytef*)pOut, &nOut, (const Bytef*)pCompr, nCompr);
    if( rc!=Z_OK ) errorMsg("uncompress failed for %s\n", zFilename);
    if( nOut>0 && fwrite(pOut, nOut, 1, out)!=1 ){
      errorMsg("failed to write: %s\n", zFilename);
    }
    sqlite3_free(pOut);
  }
  fclose(out);
................................................................................
static void add_file(
  const char *zFilename,     /* Name of file to add */
  int verboseFlag,           /* If true, show each file added */
  int noCompress             /* If true, always omit compression */
){
  int rc;
  struct stat x;

  int szOrig;
  int szCompr;
  const char *zName;

  check_filename(zFilename);
  rc = stat(zFilename, &x);
  if( rc ) errorMsg("no such file or directory: %s\n", zFilename);
................................................................................
    char *zSubpath;
    d = opendir(zFilename);
    if( d ){
      while( (pEntry = readdir(d))!=0 ){
        if( strcmp(pEntry->d_name,".")==0 || strcmp(pEntry->d_name,"..")==0 ){
          continue;
        }
        zSubpath = sqlite3_mprintf("%s/%s", zFilename, pEntry->d_name);
        add_file(zSubpath, verboseFlag, noCompress);
        sqlite3_free(zSubpath);
      }
    }
  }
}

................................................................................
      azFiles = &argv[i];
      nFiles = argc - i;
      break;
    }
  }
  if( zArchive==0 ) showHelp(argv[0]);
  if( listFlag ){

    db_open(zArchive, 0);
    if( verboseFlag ){
      db_prepare(
          "SELECT name, sz, length(data), mode, datetime(mtime,'unixepoch')"
          " FROM sqlar ORDER BY name"
      );
      while( sqlite3_step(pStmt)==SQLITE_ROW ){
................................................................................
      while( sqlite3_step(pStmt)==SQLITE_ROW ){
        printf("%s\n", sqlite3_column_text(pStmt,0));
      }
    }
    db_close(1);
  }else if( extractFlag ){
    const char *zSql;

    db_open(zArchive, 0);
    if( nFiles ){
      NameList x;
      x.azName = azFiles;
      x.nName = nFiles;
      sqlite3_create_function(db, "name_on_list", 1, SQLITE_UTF8,
                              (char*)&x, name_on_list, 0, 0);

Added sqlarfs.c.

































































































































































































































































































































































































































































>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
/*
** This file implements a FuseFS userspace client to mount an SQLAR 
** file archive (read-only).
**
** Usage:
**
**    sqlarfs ARCHIVE-FILE MOUNT-POINT
*/
#define FUSE_USE_VERSION 26
#include <fuse.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <fcntl.h>
#include <zlib.h>
#include "sqlite3.h"
#include <stdlib.h>

/*
** Global state information about the archive
*/
struct sGlobal {
  sqlite3 *db;           /* Open database connection */
  sqlite3_stmt *pStat;   /* Prepared statement to read stat info */
  sqlite3_stmt *pFList;  /* Prepared statement to list all files */
  sqlite3_stmt *pExists; /* Prepared statement to check if a file exists */
  sqlite3_stmt *pRead;   /* Prepared statement to get file content */
  char *zCacheName;      /* Cached file */
  unsigned long int szCache; /* Size of the cached file */
  char *zCacheData;      /* Content of the cached files */
} g;

/*
** Implementation of stat()
*/
static int sqlarfs_getattr(const char *path, struct stat *stbuf){
  int rc = 0;
  memset(stbuf, 0, sizeof(*stbuf));
  if( strcmp(path, "/")==0 ){
    stbuf->st_mode = S_IFDIR | 0755;
    stbuf->st_nlink = 2;
    return 0;
  }
  if( g.pStat==0 ){
    rc = sqlite3_prepare_v2(g.db,
               "SELECT mode, mtime, sz FROM sqlar WHERE name=?1",
               -1, &g.pStat, 0);
    if( rc!=SQLITE_OK ){
      return -ENOENT;
    }
  }
  sqlite3_bind_text(g.pStat, 1, &path[1], -1, SQLITE_STATIC);
  if( sqlite3_step(g.pStat)==SQLITE_ROW ){
    stbuf->st_mode = sqlite3_column_int(g.pStat, 0);
    stbuf->st_nlink = 1;
    stbuf->st_mtime = sqlite3_column_int(g.pStat, 1);
    stbuf->st_size = sqlite3_column_int64(g.pStat, 2);
    rc = 0;
  }else{
    rc = -ENOENT;
  }
  sqlite3_reset(g.pStat);
  return rc;
}


/*
** Implementation of readdir()
*/
static int sqlarfs_readdir(
  const char *path,
  void *buf,
  fuse_fill_dir_t filler,
  off_t offset,
  struct fuse_file_info *fi
){
  int rc;
  if( strcmp(path, "/")!=0 ) return -ENOENT;
  if( g.pFList==0 ){
    rc = sqlite3_prepare_v2(g.db,
               "SELECT name FROM sqlar"
               " WHERE name BETWEEN ?1 AND ?1 || char(1114111)"
               "   AND substr(name,length(?1)) NOT GLOB '*/*'",
               -1, &g.pFList, 0);
    if( rc!=SQLITE_OK ){
      return -ENOENT;
    }
  }
  filler(buf, ".", NULL, 0);
  filler(buf, "..", NULL, 0);
  sqlite3_bind_text(g.pFList, 1, &path[1], -1, SQLITE_STATIC);
  while( sqlite3_step(g.pFList)==SQLITE_ROW ){
    filler(buf, (const char*)sqlite3_column_text(g.pFList, 0), NULL, 0);
  }
  sqlite3_reset(g.pFList);
  return 0;

	return 0;
}

/*
** Implementation of open()
*/
static int sqlarfs_open(const char *path, struct fuse_file_info *fi){
  int rc;
  if( (fi->flags & 3) != O_RDONLY ) return -EACCES;
  if( g.pExists==0 ){
    rc = sqlite3_prepare_v2(g.db,
               "SELECT 1 FROM sqlar WHERE name=?1",
               -1, &g.pExists, 0);
    if( rc!=SQLITE_OK ){
      return -ENOENT;
    }
  }
  sqlite3_bind_text(g.pExists, 1, &path[1], -1, SQLITE_STATIC);
  rc = sqlite3_step(g.pExists);
  sqlite3_reset(g.pExists);
  if( rc==SQLITE_DONE ) return -ENOENT;
  return 0;
}


/*
** Load the file named path[] into the cache, if it is not there already.
**
** Return 0 on success.  Return an error code if the file could not be loaded.
*/
static int loadCache(const char *path){
  unsigned long int nIn;
  const char *zIn;
  int rc;
  if( g.zCacheName ){
    if( strcmp(path, g.zCacheName)==0 ) return 0;
    sqlite3_free(g.zCacheName); g.zCacheName = 0;
    sqlite3_free(g.zCacheData); g.zCacheData = 0;
  }
  if( g.pRead==0 ){
    rc = sqlite3_prepare_v2(g.db,
               "SELECT sz, data FROM sqlar WHERE name=?1",
               -1, &g.pRead, 0);
    if( rc!=SQLITE_OK ){
      return -EIO;
    }
  }
  sqlite3_bind_text(g.pRead, 1, path, -1, SQLITE_STATIC);
  if( sqlite3_step(g.pRead)==SQLITE_ROW ){
    g.szCache = sqlite3_column_int64(g.pRead, 0);
    zIn = (const char*)sqlite3_column_blob(g.pRead, 1);
    nIn = (unsigned long int)sqlite3_column_bytes(g.pRead, 1);
    g.zCacheData = sqlite3_malloc( g.szCache );
    if( g.zCacheData==0 ){
      rc = -EIO;
    }else{
      rc = uncompress((Bytef*)g.zCacheData, &g.szCache, (const Bytef*)zIn, nIn);
      if( rc!=Z_OK ){
        sqlite3_free(g.zCacheData);
        g.zCacheData = 0;
        rc = -EIO;
      }
    }
    if( g.zCacheData ){
      g.zCacheName = sqlite3_mprintf("%s", path);
      if( g.zCacheName==0 ){
        rc = -EIO;
        sqlite3_free(g.zCacheData);
        g.zCacheData = 0;
      }
    }
  }
  sqlite3_reset(g.pRead);
  return rc;
}

/*
** Implementation of read()
*/
static int sqlarfs_read(
  const char *path,
  char *buf,
  size_t size,
  off_t offset,
  struct fuse_file_info *fi
){
  int rc;

  rc = loadCache(&path[1]);
  if( rc==0 ){
    if( offset>=g.szCache ){
      return 0;
    }
    if( offset+size>g.szCache ) size = g.szCache - offset;
    memcpy(buf, g.zCacheData + offset, size);
    return size;
  }else{
    return rc;
  }
}  

static struct fuse_operations sqlarfs_methods = {
  .getattr = sqlarfs_getattr,
  .readdir = sqlarfs_readdir,
  .open   	= sqlarfs_open,
  .read    = sqlarfs_read,
};
int main(int argc, char **argv){
  int rc;
  if( argc<2 ){
    fprintf(stderr, "Usage: %s SQLAR-ARCHIVE [-d] [-s] [-f] MOUNT-POINT\n",
            argv[0]);
    exit(1);
  }
  rc = sqlite3_open(argv[1], &g.db);
  if( rc!=SQLITE_OK ){
    fprintf(stderr, "Cannot open sqlar file [%s]\n", argv[1]);
    exit(1);
  }
  rc = sqlite3_exec(g.db, "SELECT 1 FROM sqlar LIMIT 1", 0, 0, 0);
  if( rc!=SQLITE_OK ){
    fprintf(stderr, "File [%s] is not an SQLite archive\n", argv[1]);
    exit(1);
  }
  rc = fuse_main(argc-1, argv+1, &sqlarfs_methods, NULL);
  return rc;
}