uml: console subsystem tidying
This does a lot of cleanup on the UML console system. This patch should be
entirely non-functional.
The tidying is as follows:
header cleanups - the includes should be closer to minimal and complete
all printks now have a severity
lots of style fixes
fd_close is restructured a little in order to reduce the nesting
some functions were calling the os_* wrappers when they can
call libc directly
port_accept had a unnecessary variable
it also tested a pid unecessarily before killing it
some functions were made static
xterm_free is gone, as it was identical to generic_free
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/fd.c b/arch/um/drivers/fd.c
index 39c01ff..207b044 100644
--- a/arch/um/drivers/fd.c
+++ b/arch/um/drivers/fd.c
@@ -1,17 +1,19 @@
/*
- * Copyright (C) 2001 Jeff Dike (jdike@karaya.com)
+ * Copyright (C) 2001 - 2007 Jeff Dike (jdike@{linux.intel,addtoit}.com)
* Licensed under the GPL
*/
-#include <stdio.h>
+#include <stddef.h>
#include <stdlib.h>
-#include <unistd.h>
-#include <termios.h>
+#include <stdio.h>
#include <errno.h>
-#include "user.h"
+#include <termios.h>
+#include <unistd.h>
#include "chan_user.h"
-#include "os.h"
#include "um_malloc.h"
+#include "user.h"
+#include "os.h"
+#include "kern_constants.h"
struct fd_chan {
int fd;
@@ -26,22 +28,26 @@
char *end;
int n;
- if(*str != ':'){
- printk("fd_init : channel type 'fd' must specify a file "
- "descriptor\n");
- return(NULL);
+ if (*str != ':') {
+ printk(UM_KERN_ERR "fd_init : channel type 'fd' must specify a "
+ "file descriptor\n");
+ return NULL;
}
str++;
n = strtoul(str, &end, 0);
- if((*end != '\0') || (end == str)){
- printk("fd_init : couldn't parse file descriptor '%s'\n", str);
- return(NULL);
+ if ((*end != '\0') || (end == str)) {
+ printk(UM_KERN_ERR "fd_init : couldn't parse file descriptor "
+ "'%s'\n", str);
+ return NULL;
}
+
data = kmalloc(sizeof(*data), UM_GFP_KERNEL);
- if(data == NULL) return(NULL);
+ if(data == NULL)
+ return NULL;
+
*data = ((struct fd_chan) { .fd = n,
.raw = opts->raw });
- return(data);
+ return data;
}
static int fd_open(int input, int output, int primary, void *d, char **dev_out)
@@ -49,18 +55,18 @@
struct fd_chan *data = d;
int err;
- if(data->raw && isatty(data->fd)){
+ if (data->raw && isatty(data->fd)) {
CATCH_EINTR(err = tcgetattr(data->fd, &data->tt));
- if(err)
- return(err);
+ if (err)
+ return err;
err = raw(data->fd);
- if(err)
- return(err);
+ if (err)
+ return err;
}
sprintf(data->str, "%d", data->fd);
*dev_out = data->str;
- return(data->fd);
+ return data->fd;
}
static void fd_close(int fd, void *d)
@@ -68,13 +74,14 @@
struct fd_chan *data = d;
int err;
- if(data->raw && isatty(fd)){
- CATCH_EINTR(err = tcsetattr(fd, TCSAFLUSH, &data->tt));
- if(err)
- printk("Failed to restore terminal state - "
- "errno = %d\n", -err);
- data->raw = 0;
- }
+ if (!data->raw || !isatty(fd))
+ return;
+
+ CATCH_EINTR(err = tcsetattr(fd, TCSAFLUSH, &data->tt));
+ if (err)
+ printk(UM_KERN_ERR "Failed to restore terminal state - "
+ "errno = %d\n", -err);
+ data->raw = 0;
}
const struct chan_ops fd_ops = {
@@ -89,14 +96,3 @@
.free = generic_free,
.winch = 1,
};
-
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only. This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */