diff options
Diffstat (limited to 'toolbox/mount.c')
| -rw-r--r-- | toolbox/mount.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/toolbox/mount.c b/toolbox/mount.c index bcda2a2..66ae8b1 100644 --- a/toolbox/mount.c +++ b/toolbox/mount.c @@ -138,6 +138,24 @@ parse_mount_options(char *arg, unsigned long rwflag, struct extra_opts *extra, i return rwflag; } +/* + * Mark the given block device as read-write, using the BLKROSET ioctl. + */ +static void fs_set_blk_rw(const char *blockdev) +{ + int fd; + int OFF = 0; + + fd = open(blockdev, O_RDONLY); + if (fd < 0) { + // should never happen + return; + } + + ioctl(fd, BLKROSET, &OFF); + close(fd); +} + static char *progname; static struct extra_opts extra; @@ -179,6 +197,10 @@ do_mount(char *dev, char *dir, char *type, unsigned long rwflag, void *data, int dev = loopdev; } + if ((rwflag & MS_RDONLY) == 0) { + fs_set_blk_rw(dev); + } + while ((s = strsep(&type, ",")) != NULL) { retry: if (mount(dev, dir, s, rwflag, data) == -1) { |