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Message-ID: <20070730170912.GA7692@c2.user-mode-linux.org>
Date: Mon, 30 Jul 2007 13:09:12 -0400
From: Jeff Dike <jdike@...toit.com>
To: Andrew Morton <akpm@...l.org>
Cc: LKML <linux-kernel@...r.kernel.org>,
uml-devel <user-mode-linux-devel@...ts.sourceforge.net>
Subject: [PATCH 2/4] 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@...ux.intel.com>
--
arch/um/drivers/chan_user.c | 30 +++++++++++++++---------------
arch/um/include/os.h | 1 -
arch/um/os-Linux/file.c | 13 -------------
3 files changed, 15 insertions(+), 29 deletions(-)
Index: linux-2.6.21-mm/arch/um/drivers/chan_user.c
===================================================================
--- linux-2.6.21-mm.orig/arch/um/drivers/chan_user.c 2007-07-27 11:42:55.000000000 -0400
+++ linux-2.6.21-mm/arch/um/drivers/chan_user.c 2007-07-27 11:46:09.000000000 -0400
@@ -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;
}
Index: linux-2.6.21-mm/arch/um/include/os.h
===================================================================
--- linux-2.6.21-mm.orig/arch/um/include/os.h 2007-07-27 11:42:27.000000000 -0400
+++ linux-2.6.21-mm/arch/um/include/os.h 2007-07-27 11:46:18.000000000 -0400
@@ -134,7 +134,6 @@ extern void os_print_error(int error, co
extern int os_get_exec_close(int fd, int *close_on_exec);
extern int os_set_exec_close(int fd, int close_on_exec);
extern int os_ioctl_generic(int fd, unsigned int cmd, unsigned long arg);
-extern int os_window_size(int fd, int *rows, int *cols);
extern int os_new_tty_pgrp(int fd, int pid);
extern int os_get_ifname(int fd, char *namebuf);
extern int os_set_slip(int fd);
Index: linux-2.6.21-mm/arch/um/os-Linux/file.c
===================================================================
--- linux-2.6.21-mm.orig/arch/um/os-Linux/file.c 2007-07-27 11:42:27.000000000 -0400
+++ linux-2.6.21-mm/arch/um/os-Linux/file.c 2007-07-27 11:46:18.000000000 -0400
@@ -101,19 +101,6 @@ int os_ioctl_generic(int fd, unsigned in
return err;
}
-int os_window_size(int fd, int *rows, int *cols)
-{
- struct winsize size;
-
- if(ioctl(fd, TIOCGWINSZ, &size) < 0)
- return -errno;
-
- *rows = size.ws_row;
- *cols = size.ws_col;
-
- return 0;
-}
-
int os_new_tty_pgrp(int fd, int pid)
{
if(ioctl(fd, TIOCSCTTY, 0) < 0)
-
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