[uml-devel] cleanup file io

["Steve Schmidtke" <steve_schmidtke@hotmail.com>]

Hi Jeff,

Can I submit a cleanup patch that does stuff like this all over UML:

int load_initrd(char *filename, void *buf, int size)
{
        int fd, n;

        if((fd = os_open_file(filename, of_read(OPENFLAGS()), 0)) < 0){
-               printk("Opening '%s' failed - errno = %d\n", filename, 
errno);
+               printk("Opening '%s' failed - err = %d\n", filename, fd);
                return(-1);
        }
-       if((n = read(fd, buf, size)) != size){
+       if((n = os_read_file(fd, buf, size)) != size){
                printk("Read of %d bytes from '%s' returned %d, errno = 
%d\n",
                       size, filename, n, errno);
                return(-1);
        }
        return(0);
}

i.e. wrap bare file functions into their os_* counterparts, and remove 
unnecessary references to errno?

Also, is there a style reason some functions like the one above return -1 
rather than -errno or the failed (negative) return value from the os_* 
functions?  I'd like to standardize one style or the other while I'm at it, 
if that's workable.

Thanks,

Steve Schmidtke

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