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Checked whether the device to mount was forced read-only

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Force the read-only mount mode when the device was set so through a
command "blockdev --setro".
This commit is contained in:
Jean-Pierre André 2018-06-01 15:59:09 +02:00
parent 1f8b751341
commit ad79372024
1 changed files with 18 additions and 0 deletions
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18
libntfs-3g/unix_io.c
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@ -53,6 +53,9 @@
#ifdef HAVE_LINUX_FD_H
#include <linux/fd.h>
#endif
#ifdef HAVE_LINUX_FS_H
#include <linux/fs.h>
#endif
#include "types.h"
#include "mst.h"
@ -142,6 +145,21 @@ static int ntfs_device_unix_io_open(struct ntfs_device *dev, int flags)
err = errno;
goto err_out;
}
#ifdef HAVE_LINUX_FS_H
/* Check whether the device was forced read-only */
if (NDevBlock(dev) && ((flags & O_RDWR) == O_RDWR)) {
int r;
int state;
r = ioctl(DEV_FD(dev), BLKROGET, &state);
if (!r && state) {
err = EROFS;
if (close(DEV_FD(dev)))
err = errno;
goto err_out;
}
}
#endif
if ((flags & O_RDWR) != O_RDWR)
NDevSetReadOnly(dev);