[PATCH] uml: fix failure path after conversion

Little fix for error paths in this code.

- Some bug come from conversion to os-Linux (open() doesn't follow the
  kernel -errno return convention, while the old code called os_open_file()
  which followed it).  This caused the wrong return code to be printed.

- Then be more precise about what happened and do some whitespace fixes.

Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Cc: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

arch/um/os-Linux/umid.c

@@ -121,6 +121,7 @@ static int not_dead_yet(char *dir)
 	dead = 0;
 	fd = open(file, O_RDONLY);
 	if(fd < 0) {
+		fd = -errno;
 		if(fd != -ENOENT){
 			printk("not_dead_yet : couldn't open pid file '%s', "
 			       "err = %d\n", file, -fd);
@@ -130,9 +131,13 @@ static int not_dead_yet(char *dir)
 
 	err = 0;
 	n = read(fd, pid, sizeof(pid));
-	if(n <= 0){
+	if(n < 0){
 		printk("not_dead_yet : couldn't read pid file '%s', "
-		       "err = %d\n", file, -n);
+		       "err = %d\n", file, errno);
+		goto out_close;
+	} else if(n == 0){
+		printk("not_dead_yet : couldn't read pid file '%s', "
+		       "0-byte read\n", file);
 		goto out_close;
 	}