HelenOS sources

FAT_LCASE_LOWER_NAME   91 uspace/srv/fs/fat/fat_dentry.c 			if (d->lcase & FAT_LCASE_LOWER_NAME)
FAT_LCASE_LOWER_NAME  172 uspace/srv/fs/fat/fat_dentry.c 		d->lcase |= FAT_LCASE_LOWER_NAME;
FAT_LCASE_LOWER_NAME  174 uspace/srv/fs/fat/fat_dentry.c 		d->lcase &= ~FAT_LCASE_LOWER_NAME;
HelenOS homepage, sources at GitHub