Initial revision

src/libmdb/Makefile

@@ -0,0 +1,15 @@
+
+CC = gcc
+
+INC = -I ../include
+OBJS = catalog.o mem.o file.o 
+
+all: libmdb
+
+libmdb: $(OBJS)
+	ar cq libmdb.a $(OBJS)
+clean: 
+	rm -f core *.o *.a 
+
+.c.o:
+	$(CC) -g -c $< $(INC)

src/libmdb/catalog.c

@@ -0,0 +1,108 @@
+/* MDB Tools - A library for reading MS Access database file
+ * Copyright (C) 2000 Brian Bruns
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#include "mdbtools.h"
+
+char *mdb_get_objtype_string(int obj_type)
+{
+static char *type_name[] = {"Form",
+			"Table",
+			"Macro",
+			"System Table",
+			"Report",
+			"Query",
+			"Linked Table",
+			"Module",
+			"Unknown 0x08",
+			"Unknown 0x09",
+			"Unknown 0x0a",
+			"Unknown 0x0b"
+		};
+
+	if (obj_type > 11) {
+		return NULL;
+	} else {
+		return type_name[obj_type]; 
+	}
+}
+
+MDB_CATALOG_ENTRY *mdb_catalog_entry(MDB_HANDLE *mdb, int rowid, MDB_CATALOG_ENTRY *entry)
+{
+int offset;
+int rows;
+int i,j;
+
+	rows = mdb_get_int16(mdb, 8);
+
+	if (rowid < 0 || rowid > rows) return NULL;
+
+	offset = mdb_get_int16(mdb, 10 + 2 * rowid);
+	/* 
+	** ??? this happens, don't know what it means 
+	*/
+	if (offset & 0xF000) return NULL;
+
+/*
+for (j=offset;j<offset+32;j++)
+	fprintf(stdout,"%02x ",mdb->pg_buf[j]);
+fprintf(stdout,"\n");
+*/
+
+	memset(entry, '\0', sizeof(MDB_CATALOG_ENTRY));
+	entry->object_type = mdb->pg_buf[offset+0x09];
+	j=0;
+	for (i=offset+31;isprint(mdb->pg_buf[i]);i++) {
+		if (j<=MDB_MAX_OBJ_NAME) {
+			entry->object_name[j++]=mdb->pg_buf[i];
+		}
+	}
+	entry->object_name[j] = '\0';
+	entry->kkd_pg = mdb_get_int16(mdb,offset+31+strlen(entry->object_name)+7);
+	entry->kkd_rowid = mdb->pg_buf[offset+31+strlen(entry->object_name)+6];
+
+	return entry;
+}
+int mdb_catalog_rows(MDB_HANDLE *mdb)
+{
+	return mdb_get_int16(mdb, 0x08);
+}
+void mdb_catalog_dump(MDB_HANDLE *mdb, int obj_type)
+{
+int off, save_pos;
+int rows;
+int i,j;
+unsigned char *buf;
+MDB_CATALOG_ENTRY entry;
+
+	mdb_read_pg(mdb, MDB_CATALOG_PG);
+	rows = mdb_catalog_rows(mdb);
+
+	for (i=0;i<rows;i++) {
+		if (mdb_catalog_entry(mdb, i, &entry)) {
+			if (obj_type==-1 || obj_type==entry.object_type) {
+				fprintf(stdout,"Type: %-15s Name: %-30s KKD pg: %04x row: %2d\n",
+				mdb_get_objtype_string(entry.object_type),
+				entry.object_name,
+				entry.kkd_pg,
+				entry.kkd_rowid);
+			}
+		}
+	}
+}
+

src/libmdb/file.c

@@ -0,0 +1,103 @@
+/* MDB Tools - A library for reading MS Access database files
+ * Copyright (C) 2000 Brian Bruns
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#include "mdbtools.h"
+
+MDB_HANDLE *mdb_open(char *filename)
+{
+MDB_HANDLE *mdb;
+
+	mdb = mdb_alloc_handle();
+	mdb->filename = (char *) malloc(strlen(filename)+1);
+	strcpy(mdb->filename, filename);
+	mdb->fd = open(filename,O_RDONLY);
+
+	if (mdb->fd==-1) {
+		fprintf(stderr,"Couldn't open file %s\n",filename);
+		return NULL;
+	}
+
+	return mdb;
+}
+
+/* 
+** mdb_read a wrapper for read that bails if anything is wrong 
+*/
+size_t mdb_read_pg(MDB_HANDLE *mdb, unsigned long pg)
+{
+size_t len;
+off_t offset = pg * MDB_PGSIZE;
+struct stat status;
+
+        fstat(mdb->fd, &status);
+        if (status.st_size < offset) { 
+                fprintf(stderr,"offset %lu is beyond EOF\n",offset);
+                return 0;
+        }
+	lseek(mdb->fd, offset, SEEK_SET);
+	len = read(mdb->fd,mdb->pg_buf,MDB_PGSIZE);
+	if (len==-1) {
+		perror("read");
+		return 0;
+	}
+	else if (len<MDB_PGSIZE) {
+		fprintf(stderr,"EOF reached.\n");
+		return 0;
+	}
+	return len;
+}
+int mdb_get_int16(MDB_HANDLE *mdb, int offset)
+{
+unsigned char *c;
+int           i;
+
+	if (offset < 0 || offset+2 > MDB_PGSIZE) return -1;
+	c = &mdb->pg_buf[offset];
+	i = c[1]*256+c[0];
+
+	mdb->cur_pos+=2;
+	return i;
+	
+}
+long mdb_get_int32(MDB_HANDLE *mdb, int offset)
+{
+long l;
+unsigned char *c;
+
+	if (offset <0 || offset+4 > MDB_PGSIZE) return -1;
+	c = &mdb->pg_buf[offset];
+	l =c[3]; l<<=8;
+	l+=c[2]; l<<=8;
+	l+=c[1]; l<<=8;
+	l+=c[0];
+
+	mdb->cur_pos+=4;
+	return l;
+}
+int mdb_set_pos(MDB_HANDLE *mdb, int pos)
+{
+	if (pos<0 || pos >= MDB_PGSIZE) return 0;
+
+	mdb->cur_pos=pos;
+	return pos;
+}
+int mdb_get_pos(MDB_HANDLE *mdb)
+{
+	return mdb->cur_pos;
+}

src/libmdb/kkd.c

@@ -0,0 +1,140 @@
+/* MDB Tools - A library for reading MS Access database file
+ * Copyright (C) 2000 Brian Bruns
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#include "mdbtools.h"
+
+
+/*
+** Note: This code is mostly garbage right now...just a test to parse out the
+**       KKD structures.
+*/
+
+void mdb_kkd_dump(MDB_HANDLE *mdb, int rowid)
+{
+int rows;
+int kkd_start, kkd_end;
+int i, j, tmp, pos, row_type, hdrpos=0, datapos=0;
+int len;
+int col_type, col_num, val_len;
+int start;
+unsigned char c;
+
+	rows = mdb_get_int16(mdb,8);
+	fprintf(stdout,"number of rows = %d\n",rows);
+	kkd_start = mdb_get_int16(mdb,10+rowid*2);
+	fprintf(stdout,"kkd start = %d %04x\n",kkd_start,kkd_start);
+	kkd_end = MDB_PGSIZE;
+	for (i=0;i<rows;i++) {
+		tmp = mdb_get_int16(mdb, 10+i*2);
+		if (tmp<MDB_PGSIZE &&
+		    tmp>kkd_start &&
+		    tmp<kkd_end) {
+			kkd_end = tmp;
+		}
+	}
+	fprintf(stdout,"kkd end = %d %04x\n",kkd_end,kkd_end);
+	pos = kkd_start + 4; /* 4 = K K D \0 */
+	while (pos < kkd_end) {
+		tmp = mdb_get_int16(mdb,pos);
+		row_type = mdb_get_int16(mdb,pos+4);
+		fprintf(stdout,"row size = %3d type = 0x%02x\n",tmp,row_type);
+		if (row_type==0x80) hdrpos = pos;
+		if (row_type==0x01) datapos = pos;
+		pos += tmp;
+	}
+	
+	if (hdrpos) {
+		j=0;
+		fprintf(stdout,"\nheaders\n");
+		fprintf(stdout,"-------\n");
+		len = mdb_get_int16(mdb,hdrpos);
+		pos = hdrpos + 6;
+		while (pos < hdrpos+len) {
+			fprintf(stdout,"%3d ",j++);
+			tmp = mdb_get_int16(mdb,pos); /* length of string */
+			pos += 2;
+			for (i=0;i<tmp;i++) 
+				fprintf(stdout,"%c",mdb->pg_buf[pos+i]);
+			fprintf(stdout,"\n");
+			pos += tmp; 
+		}
+	}
+	if (datapos) {
+		fprintf(stdout,"\n data\n");
+		fprintf(stdout,"-------\n");
+		len = mdb_get_int16(mdb,datapos);
+		pos = datapos + 6;
+		while (pos < datapos+len) {
+			start = pos;
+			tmp = mdb_get_int16(mdb,pos); /* length of field */
+			pos += 2;
+			col_type = mdb_get_int16(mdb,pos); /* ??? */
+			pos += 2;
+			col_num = 0;
+			if (col_type) {
+				col_num = mdb_get_int16(mdb,pos); 
+				pos += 2;
+			}
+			val_len = mdb_get_int16(mdb,pos);
+			pos += 2;
+			fprintf(stdout,"length = %3d %04x %2d %2d ",tmp, col_type, col_num, val_len);
+			for (i=0;i<val_len;i++) {
+				c = mdb->pg_buf[pos+i];
+				if (isprint(c))
+					fprintf(stdout,"  %c",c);
+				else 
+					fprintf(stdout," %02x",c);
+	
+			}
+			fprintf(stdout,"\n");
+			pos = start + tmp; 
+		}
+	}
+}
+main(int argc, char **argv)
+{
+int rows;
+int i;
+unsigned char buf[2048];
+MDB_HANDLE *mdb;
+MDB_CATALOG_ENTRY entry;
+
+
+	if (argc<2) {
+		fprintf(stderr,"Usage: prtable <file> <table>\n");
+		exit(1);
+	}
+	
+	mdb = mdb_open(argv[1]);
+
+	mdb_read_pg(mdb, MDB_CATALOG_PG);
+	rows = mdb_catalog_rows(mdb);
+
+	for (i=0;i<rows;i++) {
+  		if (mdb_catalog_entry(mdb, i, &entry)) {
+			if (!strcmp(entry.object_name,argv[2])) {
+				mdb_read_pg(mdb, entry.kkd_pg);
+				mdb_kkd_dump(mdb, entry.kkd_rowid);
+  			}
+		}
+	}
+
+	mdb_free_handle(mdb);
+}
+

src/libmdb/mem.c

@@ -0,0 +1,37 @@
+/* MDB Tools - A library for reading MS Access database files
+ * Copyright (C) 2000 Brian Bruns
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#include "mdbtools.h"
+
+MDB_HANDLE *mdb_alloc_handle()
+{
+MDB_HANDLE *mdb;
+
+	mdb = (MDB_HANDLE *) malloc(sizeof(MDB_HANDLE));
+	memset(mdb, '\0', sizeof(MDB_HANDLE));
+
+	return mdb;	
+}
+void mdb_free_handle(MDB_HANDLE *mdb)
+{
+	if (!mdb) return;	
+
+	if (mdb->filename) free(mdb->filename);
+	free(mdb);
+}