* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
* Copyright (C) 2005 by Rob Landley <rob@landley.net>
*
- * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
#include "libbb.h"
#include <linux/version.h>
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
/* For 2.6, use the cleaned up header to get the 64 bit API. */
-# include "fix_u32.h" /* some old toolchains need __u64 for linux/loop.h */
+// Commented out per Rob's request
+//# include "fix_u32.h" /* some old toolchains need __u64 for linux/loop.h */
# include <linux/loop.h>
typedef struct loop_info64 bb_loop_info;
# define BB_LOOP_SET_STATUS LOOP_SET_STATUS64
fd = open(device, O_RDONLY);
if (fd >= 0) {
if (ioctl(fd, BB_LOOP_GET_STATUS, &loopinfo) == 0) {
- dev = xasprintf("%lu %s", (long) loopinfo.lo_offset,
+ dev = xasprintf("%"OFF_FMT"u %s", (off_t) loopinfo.lo_offset,
(char *)loopinfo.lo_file_name);
}
close(fd);
/* Find a loop device. */
try = *device ? *device : dev;
- for (i = 0; rc; i++) {
+ /* 1048575 is a max possible minor number in Linux circa 2010 */
+ for (i = 0; rc && i < 1048576; i++) {
sprintf(dev, LOOP_FORMAT, i);
- /* Ran out of block devices, return failure. */
+ IF_FEATURE_MOUNT_LOOP_CREATE(errno = 0;)
if (stat(try, &statbuf) != 0 || !S_ISBLK(statbuf.st_mode)) {
+ if (ENABLE_FEATURE_MOUNT_LOOP_CREATE
+ && errno == ENOENT
+ && try == dev
+ ) {
+ /* Node doesn't exist, try to create it. */
+ if (mknod(dev, S_IFBLK|0644, makedev(7, i)) == 0)
+ goto try_to_open;
+ }
+ /* Ran out of block devices, return failure. */
rc = -ENOENT;
break;
}
+ try_to_open:
/* Open the sucker and check its loopiness. */
dfd = open(try, mode);
if (dfd < 0 && errno == EROFS) {