uml: tidy recently-moved code
Now that the generic console operations are in a userspace file, we
can do the following:
directly call into libc instead of through the os_* wrappers
eliminate os_window_size since it has only one user
Signed-off-by: Jeff Dike <jdike@linux.intel.com>
Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/arch/um/drivers/chan_user.c b/arch/um/drivers/chan_user.c
index 249c877..40271af 100644
--- a/arch/um/drivers/chan_user.c
+++ b/arch/um/drivers/chan_user.c
@@ -23,43 +23,43 @@
void generic_close(int fd, void *unused)
{
- os_close_file(fd);
+ close(fd);
}
int generic_read(int fd, char *c_out, void *unused)
{
int n;
- n = os_read_file(fd, c_out, sizeof(*c_out));
-
- if(n == -EAGAIN)
+ n = read(fd, c_out, sizeof(*c_out));
+ if (n > 0)
+ return n;
+ else if (errno == EAGAIN)
return 0;
- else if(n == 0)
+ else if (n == 0)
return -EIO;
- return n;
+ return -errno;
}
-/* XXX Trivial wrapper around os_write_file */
+/* XXX Trivial wrapper around write */
int generic_write(int fd, const char *buf, int n, void *unused)
{
- return os_write_file(fd, buf, n);
+ return write(fd, buf, n);
}
int generic_window_size(int fd, void *unused, unsigned short *rows_out,
unsigned short *cols_out)
{
- int rows, cols;
+ struct winsize size;
int ret;
- ret = os_window_size(fd, &rows, &cols);
- if(ret < 0)
- return ret;
+ if(ioctl(fd, TIOCGWINSZ, &size) < 0)
+ return -errno;
- ret = ((*rows_out != rows) || (*cols_out != cols));
+ ret = ((*rows_out != size.ws_row) || (*cols_out != size.ws_col));
- *rows_out = rows;
- *cols_out = cols;
+ *rows_out = size.ws_row;
+ *cols_out = size.ws_col;
return ret;
}