link_r.c

FAT16 Filesystem on Philips LPC2000 series processors

#include <reent.h>
#include <errno.h>
#include <devices.h>
#include <string.h>
#include <sysdefs.h>
#include <ioctl.h>

int _link_r (struct _reent *r, const char * old, const char * new)
{
#ifdef HAS_MMC
int	len, idx;
struct IOCTLRENAMESTRUCT {
	const char * oldname;
	const char * newname;
} IOCTL_RENAME;
		// all devices must start with a name and name is bracketed with '/'.
	if (old[0] == '/') {
			// we might have a valid device name, search the table list.
		for (idx=0; device_table_list [idx].item; idx++) {
			len = strlen(device_table_list[idx].item->name);
			if (strncmp (device_table_list [idx].item->name, &old[1], len) == 0) {
					// ensure trailing '/'.
				if (old[len+1] != '/') continue;
					// found it, now call the open.
					// device is called with device name removed.
				if (device_table_list [idx].item->ioctl) {
					IOCTL_RENAME.oldname = &old[len+2];
					IOCTL_RENAME.newname = new;
					return device_table_list [idx].item->ioctl (r, 0, IOCTL_MMC_RENAME, &IOCTL_RENAME);
				}
			}
		}
	}
#endif
		// otherwise we get nasty about it..
	r->_errno = EINVAL;
	return -1;
}

// vi:nowrap