/* *	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 <asm/uaccess.h>extern asmlinkage long sys_chown(const char *, uid_t,gid_t);extern asmlinkage long sys_lchown(const char *, uid_t,gid_t);extern asmlinkage long sys_fchown(unsigned int, uid_t,gid_t);extern asmlinkage long sys_setregid(gid_t, gid_t);extern asmlinkage long sys_setgid(gid_t);extern asmlinkage long sys_setreuid(uid_t, uid_t);extern asmlinkage long sys_setuid(uid_t);extern asmlinkage long sys_setresuid(uid_t, uid_t, uid_t);extern asmlinkage long sys_setresgid(gid_t, gid_t, gid_t);extern asmlinkage long sys_setfsuid(uid_t);extern asmlinkage long sys_setfsgid(gid_t); asmlinkage long sys_chown16(const char * filename, old_uid_t user, old_gid_t group){	return sys_chown(filename, low2highuid(user), low2highgid(group));}asmlinkage long sys_lchown16(const char * 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((gid_t)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((uid_t)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 *ruid, old_uid_t *euid, old_uid_t *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 *rgid, old_gid_t *egid, old_gid_t *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((uid_t)uid);}asmlinkage long sys_setfsgid16(old_gid_t gid){	return sys_setfsgid((gid_t)gid);}asmlinkage long sys_getgroups16(int gidsetsize, old_gid_t *grouplist){	old_gid_t groups[NGROUPS];	int i,j;	if (gidsetsize < 0)		return -EINVAL;	i = current->ngroups;	if (gidsetsize) {		if (i > gidsetsize)			return -EINVAL;		for(j=0;j<i;j++)			groups[j] = current->groups[j];		if (copy_to_user(grouplist, groups, sizeof(old_gid_t)*i))			return -EFAULT;	}	return i;}asmlinkage long sys_setgroups16(int gidsetsize, old_gid_t *grouplist){	old_gid_t 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++)		current->groups[i] = (gid_t)groups[i];	current->ngroups = gidsetsize;	return 0;}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);}