/* Note: HP-UX just uses the old suser() function to check perms
* in this system call. We'll use capable(CAP_SYS_ADMIN).
*/
int hpux_utssys(char *ubuf, int n, int type)
{
int len;
int error;
switch( type ) {
case 0:
/* uname(): */
return( hpux_uname( (struct hpux_utsname *)ubuf ) );
break ;
case 1:
/* Obsolete (used to be umask().) */
return -EFAULT ;
break ;
case 2:
/* ustat(): */
return( hpux_ustat(new_decode_dev(n), (struct hpux_ustat *)ubuf) );
break ;
case 3:
/* setuname():
*
* On linux (unlike HP-UX), utsname.nodename
* is the same as the hostname.
*
* sys_sethostname() is defined in linux/kernel/sys.c.
*/
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
/* Unlike Linux, HP-UX returns an error if n==0: */
if ( n <= 0 )
return -EINVAL ;
/* Unlike Linux, HP-UX truncates it if n is too big: */
len = (n <= __NEW_UTS_LEN) ? n : __NEW_UTS_LEN ;
return( sys_sethostname(ubuf, len) );
break ;
case 4:
/* sethostname():
*
* sys_sethostname() is defined in linux/kernel/sys.c.
*/
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
/* Unlike Linux, HP-UX returns an error if n==0: */
if ( n <= 0 )
return -EINVAL ;
/* Unlike Linux, HP-UX truncates it if n is too big: */
len = (n <= __NEW_UTS_LEN) ? n : __NEW_UTS_LEN ;
return( sys_sethostname(ubuf, len) );
break ;
case 5:
/* gethostname():
*
* sys_gethostname() is defined in linux/kernel/sys.c.
*/
/* Unlike Linux, HP-UX returns an error if n==0: */
if ( n <= 0 )
return -EINVAL ;
return( sys_gethostname(ubuf, n) );
break ;
case 6:
/* Supposedly called from setuname() in libc.
* TODO: When and why is this called?
* Is it ever even called?
*
* This code should look a lot like sys_sethostname(),
* defined in linux/kernel/sys.c. If that gets updated,
* update this code similarly.
*/
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
/* Unlike Linux, HP-UX returns an error if n==0: */
if ( n <= 0 )
return -EINVAL ;
/* Unlike Linux, HP-UX truncates it if n is too big: */
len = (n <= __NEW_UTS_LEN) ? n : __NEW_UTS_LEN ;
/**/
/* TODO: print a warning about using this? */
down_write(&uts_sem);
error = -EFAULT;
if (!copy_from_user(system_utsname.sysname, ubuf, len)) {
system_utsname.sysname[len] = 0;
error = 0;
}
up_write(&uts_sem);
return error;
break ;
case 7:
/* Sets utsname.release, if you're allowed.
* Undocumented. Used by swinstall to change the
* OS version, during OS updates. Yuck!!!
*
* This code should look a lot like sys_sethostname()
* in linux/kernel/sys.c. If that gets updated, update
* this code similarly.
*/
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
/* Unlike Linux, HP-UX returns an error if n==0: */
if ( n <= 0 )
return -EINVAL ;
/* Unlike Linux, HP-UX truncates it if n is too big: */
len = (n <= __NEW_UTS_LEN) ? n : __NEW_UTS_LEN ;
/**/
/* TODO: print a warning about this? */
down_write(&uts_sem);
error = -EFAULT;
if (!copy_from_user(system_utsname.release, ubuf, len)) {
system_utsname.release[len] = 0;
error = 0;
}
up_write(&uts_sem);
return error;
break ;
default:
/* This system call returns -EFAULT if given an unknown type.
* Why not -EINVAL? I don't know, it's just not what they did.
*/
return -EFAULT ;
}
}
int hpux_utssys(char __user *ubuf, int n, int type)
{
int len;
int error;
switch( type ) {
case 0:
return hpux_uname((struct hpux_utsname __user *)ubuf);
break ;
case 1:
return -EFAULT ;
break ;
case 2:
return hpux_ustat(new_decode_dev(n),
(struct hpux_ustat __user *)ubuf);
break;
case 3:
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
if ( n <= 0 )
return -EINVAL ;
len = (n <= __NEW_UTS_LEN) ? n : __NEW_UTS_LEN ;
return sys_sethostname(ubuf, len);
break ;
case 4:
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
if ( n <= 0 )
return -EINVAL ;
len = (n <= __NEW_UTS_LEN) ? n : __NEW_UTS_LEN ;
return sys_sethostname(ubuf, len);
break ;
case 5:
if ( n <= 0 )
return -EINVAL ;
return sys_gethostname(ubuf, n);
break ;
case 6:
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
if ( n <= 0 )
return -EINVAL ;
len = (n <= __NEW_UTS_LEN) ? n : __NEW_UTS_LEN ;
down_write(&uts_sem);
error = -EFAULT;
if (!copy_from_user(utsname()->sysname, ubuf, len)) {
utsname()->sysname[len] = 0;
error = 0;
}
up_write(&uts_sem);
return error;
break ;
case 7:
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
if ( n <= 0 )
return -EINVAL ;
len = (n <= __NEW_UTS_LEN) ? n : __NEW_UTS_LEN ;
down_write(&uts_sem);
error = -EFAULT;
if (!copy_from_user(utsname()->release, ubuf, len)) {
utsname()->release[len] = 0;
error = 0;
}
up_write(&uts_sem);
return error;
break ;
default:
return -EFAULT ;
}
}