Hi Sascha,
On Mon, Feb 18, 2013 at 11:17:33AM +0100, Sascha Hauer wrote:
> On Sun, Feb 17, 2013 at 10:05:01PM +0100, Alexander Aring wrote:
> > Add pread and pwrite functions.
> >
> > Split read and write functions to save some space.
> > The functions pread and pwrite saves and sets the file
> > position to a given offset and restore them afterwards.
> >
> > Signed-off-by: Alexander Aring <alex.aring@xxxxxxxxx>
> > ---
> > fs/fs.c | 89 ++++++++++++++++++++++++++++++++++++++++++++++++++----------
> > include/fs.h | 2 ++
> > 2 files changed, 77 insertions(+), 14 deletions(-)
> >
> > diff --git a/fs/fs.c b/fs/fs.c
> > index 48d1c89..497a2ea 100644
> > --- a/fs/fs.c
> > +++ b/fs/fs.c
> > @@ -754,17 +754,12 @@ int ioctl(int fd, int request, void *buf)
> > return ret;
> > }
> >
> > -ssize_t read(int fd, void *buf, size_t count)
> > +static ssize_t __read(FILE *f, void *buf, size_t count)
> > {
> > struct device_d *dev;
> > struct fs_driver_d *fsdrv;
> > - FILE *f;
> > int ret;
> >
> > - if (check_fd(fd))
> > - return -errno;
> > -
> > - f = &files[fd];
> > dev = f->dev;
> >
> > fsdrv = dev_to_fs_driver(dev);
> > @@ -777,18 +772,34 @@ ssize_t read(int fd, void *buf, size_t count)
> >
> > ret = fsdrv->read(dev, f, buf, count);
> >
> > - if (ret > 0)
> > - f->pos += ret;
> > if (ret < 0)
> > errno = -ret;
> > return ret;
> > }
> > -EXPORT_SYMBOL(read);
> > +EXPORT_SYMBOL(pread);
> >
> > -ssize_t write(int fd, const void *buf, size_t count)
> > +ssize_t pread(int fd, void *buf, size_t count, loff_t offset)
> > +{
> > + loff_t pos;
> > + FILE *f;
> > + int ret;
> > +
> > + if (check_fd(fd))
> > + return -errno;
> > +
> > + f = &files[fd];
> > +
> > + pos = f->pos;
> > + f->pos = offset;
> > + ret = __read(f, buf, count);
> > + f->pos = pos;
> > +
> > + return ret;
> > +}
> > +EXPORT_SYMBOL(pread);
>
> pread is exported twice with this patch. I fixed this while applying.
>
Ooops, sry. Thanks for applying.
Regards
Alex
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