- struct inode *inode = filp->f_dentry->d_inode;
- int i, j, k;
- u32 node;
- char *p, *s;
- u32 *q;
- openprom_property *op;
- char buffer[64];
-
- if (filp->f_pos >= 0xffffff || count >= 0xffffff)
- return -EINVAL;
- if (!filp->private_data) {
- node = nodes[(u16)((long)inode->u.generic_ip)].node;
- i = ((u32)(long)inode->u.generic_ip) >> 16;
- if ((u16)((long)inode->u.generic_ip) == aliases) {
- if (i >= aliases_nodes)
- p = 0;
- else
- p = alias_names [i];
- } else
- for (p = prom_firstprop (node, buffer);
- i && p && *p;
- p = prom_nextprop (node, p, buffer), i--)
- /* nothing */ ;
- if (!p || !*p)
- return -EIO;
- i = prom_getproplen (node, p);
- if (i < 0) {
- if ((u16)((long)inode->u.generic_ip) == aliases)
- i = 0;
- else
- return -EIO;
- }
- k = i;
- if (i < 64) i = 64;
- filp->private_data = kmalloc (sizeof (openprom_property)
- + (j = strlen (p)) + 2 * i,
- GFP_KERNEL);
- if (!filp->private_data)
- return -ENOMEM;
- op = (openprom_property *)filp->private_data;
- op->flag = 0;
- op->alloclen = 2 * i;
- strcpy (op->name, p);
- op->value = (char *)(((unsigned long)(op->name + j + 4)) & ~3);
- op->len = k;
- if (k && prom_getproperty (node, p, op->value, i) < 0)
- return -EIO;
- op->value [k] = 0;
- if (k) {
- for (s = 0, p = op->value; p < op->value + k; p++) {
- if ((*p >= ' ' && *p <= '~') || *p == '\n') {
- op->flag |= OPP_STRING;
- s = p;
- continue;
- }
- if (p > op->value && !*p && s == p - 1) {
- if (p < op->value + k - 1)
- op->flag |= OPP_STRINGLIST;
- else
- op->flag |= OPP_ASCIIZ;
- continue;
- }
- if (k == 1 && !*p) {
- op->flag |= (OPP_STRING|OPP_ASCIIZ);
- break;
- }
- op->flag &= ~(OPP_STRING|OPP_STRINGLIST);
- if (k & 3)
- op->flag |= OPP_HEXSTRING;
- else
- op->flag |= OPP_BINARY;
- break;
- }
- if (op->flag & OPP_STRINGLIST)
- op->flag &= ~(OPP_STRING);
- if (op->flag & OPP_ASCIIZ)
- op->len--;
- }
- } else
- op = (openprom_property *)filp->private_data;
- if (!count || !(op->len || (op->flag & OPP_ASCIIZ)))
- return 0;
- if (op->flag & OPP_STRINGLIST) {
- for (k = 0, p = op->value; p < op->value + op->len; p++)
- if (!*p)
- k++;
- i = op->len + 4 * k + 3;
- } else if (op->flag & OPP_STRING) {
- i = op->len + 3;
- } else if (op->flag & OPP_BINARY) {
- i = (op->len * 9) >> 2;
- } else {
- i = (op->len << 1) + 1;
- }
- k = filp->f_pos;
- if (k >= i) return 0;
- if (count > i - k) count = i - k;
- if (op->flag & OPP_STRING) {
- if (!k) {
- if (put_user('\'', buf))
- return -EFAULT;
- k++;
- count--;
- }