/* 23.4.15 */
acl_t
acl_get_fd(int fd)
{
const size_t size_guess = acl_ea_size(16);
char *ext_acl_p = alloca(size_guess);
int retval;
if (!ext_acl_p)
return NULL;
retval = fgetxattr(fd, ACL_EA_ACCESS, ext_acl_p, size_guess);
if (retval == -1 && errno == ERANGE) {
retval = fgetxattr(fd, ACL_EA_ACCESS, NULL, 0);
if (retval > 0) {
ext_acl_p = alloca(retval);
if (!ext_acl_p)
return NULL;
retval = fgetxattr(fd, ACL_EA_ACCESS, ext_acl_p,retval);
}
}
if (retval > 0) {
acl_t acl = __acl_from_xattr(ext_acl_p, retval);
return acl;
} else if (retval == 0 || errno == ENOATTR || errno == ENODATA) {
struct stat st;
if (fstat(fd, &st) == 0)
return acl_from_mode(st.st_mode);
else
return NULL;
} else
return NULL;
}
int ext4_to_fuse_acl(acl_ea_header **facl, size_t *facl_sz,
const ext4_acl_header *eacl, size_t eacl_sz)
{
int i, eacl_count;
acl_ea_header *f;
ext4_acl_entry *e;
acl_ea_entry *a;
size_t f_sz;
unsigned char *hptr;
int err = 0;
eacl_count = ext4_acl_count(eacl_sz);
f_sz = acl_ea_size(eacl_count);
if (eacl_count < 0 ||
eacl->a_version != ext2fs_cpu_to_le32(EXT4_ACL_VERSION))
return -EINVAL;
f = malloc(f_sz);
if (!f)
return -ENOMEM;
f->a_version = ACL_EA_VERSION;
hptr = (unsigned char *) (eacl + 1);
for (i = 0, a = f->a_entries; i < eacl_count; i++, a++) {
e = (ext4_acl_entry *) hptr;
a->e_tag = ext2fs_le16_to_cpu(e->e_tag);
a->e_perm = ext2fs_le16_to_cpu(e->e_perm);
switch (a->e_tag) {
case ACL_USER:
case ACL_GROUP:
a->e_id = ext2fs_le32_to_cpu(e->e_id);
hptr += sizeof(ext4_acl_entry);
break;
case ACL_USER_OBJ:
case ACL_GROUP_OBJ:
case ACL_MASK:
case ACL_OTHER:
hptr += sizeof(ext4_acl_entry_short);
break;
default:
err = -EINVAL;
goto out;
}
}
*facl = f;
*facl_sz = f_sz;
return err;
out:
free(f);
return err;
}
