/* *	Wrapper functions for 16bit uid back compatibility. All nicely tied *	together in the faint hope we can take the out in five years time. */ #include <linux/mm.h>#include <linux/utsname.h>#include <linux/mman.h>#include <linux/smp_lock.h>#include <linux/notifier.h>#include <linux/reboot.h>#include <linux/prctl.h>#include <linux/init.h>#include <linux/highuid.h>#include <linux/security.h>#include <linux/syscalls.h> #include <asm/uaccess.h> asmlinkage long sys_chown16(const char __user * filename, old_uid_t user, old_gid_t group){	return sys_chown(filename, low2highuid(user), low2highgid(group));} asmlinkage long sys_lchown16(const char __user * filename, old_uid_t user, old_gid_t group){	return sys_lchown(filename, low2highuid(user), low2highgid(group));} asmlinkage long sys_fchown16(unsigned int fd, old_uid_t user, old_gid_t group){	return sys_fchown(fd, low2highuid(user), low2highgid(group));} asmlinkage long sys_setregid16(old_gid_t rgid, old_gid_t egid){	return sys_setregid(low2highgid(rgid), low2highgid(egid));} asmlinkage long sys_setgid16(old_gid_t gid){	return sys_setgid(low2highgid(gid));} asmlinkage long sys_setreuid16(old_uid_t ruid, old_uid_t euid){	return sys_setreuid(low2highuid(ruid), low2highuid(euid));} asmlinkage long sys_setuid16(old_uid_t uid){	return sys_setuid(low2highuid(uid));} asmlinkage long sys_setresuid16(old_uid_t ruid, old_uid_t euid, old_uid_t suid){	return sys_setresuid(low2highuid(ruid), low2highuid(euid),		low2highuid(suid));} asmlinkage long sys_getresuid16(old_uid_t __user *ruid, old_uid_t __user *euid, old_uid_t __user *suid){	int retval; 	if (!(retval = put_user(high2lowuid(current->uid), ruid)) &&	    !(retval = put_user(high2lowuid(current->euid), euid)))		retval = put_user(high2lowuid(current->suid), suid); 	return retval;} asmlinkage long sys_setresgid16(old_gid_t rgid, old_gid_t egid, old_gid_t sgid){	return sys_setresgid(low2highgid(rgid), low2highgid(egid),		low2highgid(sgid));} asmlinkage long sys_getresgid16(old_gid_t __user *rgid, old_gid_t __user *egid, old_gid_t __user *sgid){	int retval; 	if (!(retval = put_user(high2lowgid(current->gid), rgid)) &&	    !(retval = put_user(high2lowgid(current->egid), egid)))		retval = put_user(high2lowgid(current->sgid), sgid); 	return retval;} asmlinkage long sys_setfsuid16(old_uid_t uid){	return sys_setfsuid(low2highuid(uid));} asmlinkage long sys_setfsgid16(old_gid_t gid){	return sys_setfsgid(low2highgid(gid));} static int groups16_to_user(old_gid_t __user *grouplist,    struct group_info *group_info){	int i;	old_gid_t group; 	for (i = 0; i < group_info->ngroups; i++) {		group = high2lowgid(GROUP_AT(group_info, i));		if (put_user(group, grouplist+i))			return -EFAULT;	} 	return 0;} static int groups16_from_user(struct group_info *group_info,    old_gid_t __user *grouplist){	int i;	old_gid_t group; 	for (i = 0; i < group_info->ngroups; i++) {		if (get_user(group, grouplist+i))			return  -EFAULT;		GROUP_AT(group_info, i) = low2highgid(group);	} 	return 0;} asmlinkage long sys_getgroups16(int gidsetsize, old_gid_t __user *grouplist){	int i = 0; 	if (gidsetsize < 0)		return -EINVAL; 	get_group_info(current->group_info);	i = current->group_info->ngroups;	if (gidsetsize) {		if (i > gidsetsize) {			i = -EINVAL;			goto out;		}		if (groups16_to_user(grouplist, current->group_info)) {			i = -EFAULT;			goto out;		}	}out:	put_group_info(current->group_info);	return i;} asmlinkage long sys_setgroups16(int gidsetsize, old_gid_t __user *grouplist){	struct group_info *group_info;	int retval; 	if (!capable(CAP_SETGID))		return -EPERM;	if ((unsigned)gidsetsize > NGROUPS_MAX)		return -EINVAL; 	group_info = groups_alloc(gidsetsize);	if (!group_info)		return -ENOMEM;	retval = groups16_from_user(group_info, grouplist);	if (retval) {		put_group_info(group_info);		return retval;	} 	retval = set_current_groups(group_info);	put_group_info(group_info); 	return retval;} asmlinkage long sys_getuid16(void){	return high2lowuid(current->uid);} asmlinkage long sys_geteuid16(void){	return high2lowuid(current->euid);} asmlinkage long sys_getgid16(void){	return high2lowgid(current->gid);} asmlinkage long sys_getegid16(void){	return high2lowgid(current->egid);}