asmlinkage long sys_setgroups(int gidsetsize, gid_t __user *grouplist)
{
gid_t groups[NGROUPS];
int retval;
if (!capable(CAP_SETGID))
return -EPERM;
if ((unsigned) gidsetsize > NGROUPS)
return -EINVAL;
if (copy_from_user(groups, grouplist, gidsetsize * sizeof(gid_t)))
return -EFAULT;
retval = security_task_setgroups(gidsetsize, groups);
if (retval)
return retval;
memcpy(current->groups, groups, gidsetsize * sizeof(gid_t));
current->ngroups = gidsetsize;
return 0;
}
asmlinkage long sys_setgroups16(int gidsetsize, old_gid_t *grouplist)
{
old_gid_t groups[NGROUPS];
gid_t new_groups[NGROUPS];
int i;
if (!capable(CAP_SETGID))
return -EPERM;
if ((unsigned) gidsetsize > NGROUPS)
return -EINVAL;
if (copy_from_user(groups, grouplist, gidsetsize * sizeof(old_gid_t)))
return -EFAULT;
for (i = 0 ; i < gidsetsize ; i++)
new_groups[i] = (gid_t)groups[i];
if ((i = security_task_setgroups(gidsetsize, new_groups)))
return i;
memcpy(current->groups, new_groups, gidsetsize * sizeof(gid_t));
current->ngroups = gidsetsize;
return 0;
}
/* validate and set current->group_info */
int set_current_groups(struct group_info *group_info)
{
int retval;
struct group_info *old_info;
retval = security_task_setgroups(group_info);
if (retval)
return retval;
groups_sort(group_info);
get_group_info(group_info);
task_lock(current);
old_info = current->group_info;
current->group_info = group_info;
task_unlock(current);
put_group_info(old_info);
return 0;
}
