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Patches for _xdb_read_data and xdb_open #31

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Patches for _xdb_read_data and xdb_open #31

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5417e40
Add some protections in _xdb_read_data
bearlin Mar 7, 2016
43b977d
xdb_open add O_BINARY flag for cygwin/windows
bearlin Mar 7, 2016
1535e1e
Unify macro O_BINARY for xdb_open
bearlin Mar 8, 2016
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21 changes: 14 additions & 7 deletions libscws/xdb.c
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Original file line number Diff line number Diff line change
Expand Up @@ -6,31 +6,32 @@
*/

#ifdef HAVE_CONFIG_H
# include "config.h"
#include "config.h"
#endif

#ifdef WIN32
# include "config_win32.h"
#include "config_win32.h"
#endif

#include "xdb.h"
#include "lock.h"
#include <stdio.h>
#include <stdlib.h>
#ifndef WIN32
# include <unistd.h>
#include <sys/file.h>
#include <unistd.h>
#endif
#include <string.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <sys/types.h>

#ifdef HAVE_FLOCK
# include <sys/file.h>
#include <sys/file.h>
#endif

#ifdef HAVE_MMAP
# include <sys/mman.h>
#include <sys/mman.h>
#endif

static int _xdb_hasher(xdb_t x, const char *s, int len)
Expand All @@ -57,8 +58,10 @@ static void _xdb_read_data(xdb_t x, void *buf, unsigned int off, int len)

if (x->fd >= 0)
{
lseek(x->fd, off, SEEK_SET);
read(x->fd, buf, len);
if (lseek(x->fd, off, SEEK_SET) == -1)
return;
if (read(x->fd, buf, len) != len)
return;
}
else
{
Expand Down Expand Up @@ -132,7 +135,11 @@ xdb_t xdb_open(const char *fpath, int mode)
return NULL;

/* try to open & check the file */
#ifdef WIN32
if ((x->fd = open(fpath, mode == 'w' ? O_RDWR|O_BINARY : O_RDONLY|O_BINARY)) < 0)
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@bearlin bearlin Mar 7, 2016

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O_BINARY: the 'binary' mode flag on Windows, this flag only exist in Windows platform.
Ref : https://msdn.microsoft.com/en-us/library/tw4k6df8.aspx

#else //WIN32
if ((x->fd = open(fpath, mode == 'w' ? O_RDWR : O_RDONLY)) < 0)
#endif //WIN32
{
#ifdef DEBUG
perror("Failed to open the XDB file");
Expand Down