unlink_r.c

FAT16 Filesystem on Philips LPC2000 series processors

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

int _unlink_r (struct _reent *r, const char * filename)
{
#ifdef HAS_MMC
int	i, len;
long	ptr;
		// unlink is from some device name, so find that named device.
		// all devices must start with a name and name is bracketed with '/'.
	if (filename[0] == '/') {
			// we might have a valid device name, search the table list.
		for (i=0; device_table_list [i].item; i++) {
			len = strlen(device_table_list[i].item->name);
			if (strncmp (device_table_list [i].item->name, &filename[1], len) == 0) {
					// ensure trailing '/'.
				if (filename[len+1] != '/') continue;
					// found it, now call the unlink.
					// device is called with device name removed.
				if (device_table_list[i].item->ioctl) {
					ptr = ((long)&filename[len+2]);
					return device_table_list[i].item->ioctl(r, 0, IOCTL_MMC_UNLINK, (long *)&ptr);
				}
			}
		}
	}
#endif
		// otherwise we get nasty about it..
	r->_errno = ENODEV;
	return -1;
}

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