051819b847
to global hostname and domainname variables. Where necessary, copy to or from a stack-local buffer before performing copyin() or copyout(). A few uses, such as in cd9660 and daemon_saver, remain under-synchronized and will require further updates. Correct a bug in which a failed copyin() of domainname would leave domainname potentially corrupted. MFC after: 3 weeks
291 lines
6.6 KiB
C
291 lines
6.6 KiB
C
/*-
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* Copyright (c) 1982, 1986, 1989, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)kern_xxx.c 8.2 (Berkeley) 11/14/93
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_compat.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/sysproto.h>
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#include <sys/kernel.h>
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#include <sys/priv.h>
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#include <sys/proc.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <sys/sysctl.h>
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#include <sys/utsname.h>
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#if defined(COMPAT_43)
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#ifndef _SYS_SYSPROTO_H_
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struct gethostname_args {
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char *hostname;
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u_int len;
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};
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#endif
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/* ARGSUSED */
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int
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ogethostname(td, uap)
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struct thread *td;
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struct gethostname_args *uap;
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{
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int name[2];
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int error;
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size_t len = uap->len;
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name[0] = CTL_KERN;
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name[1] = KERN_HOSTNAME;
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mtx_lock(&Giant);
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error = userland_sysctl(td, name, 2, uap->hostname, &len,
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1, 0, 0, 0, 0);
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mtx_unlock(&Giant);
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return(error);
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}
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#ifndef _SYS_SYSPROTO_H_
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struct sethostname_args {
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char *hostname;
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u_int len;
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};
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#endif
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/* ARGSUSED */
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int
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osethostname(td, uap)
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struct thread *td;
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register struct sethostname_args *uap;
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{
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int name[2];
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int error;
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name[0] = CTL_KERN;
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name[1] = KERN_HOSTNAME;
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mtx_lock(&Giant);
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error = userland_sysctl(td, name, 2, 0, 0, 0, uap->hostname,
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uap->len, 0, 0);
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mtx_unlock(&Giant);
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return (error);
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}
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#ifndef _SYS_SYSPROTO_H_
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struct ogethostid_args {
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int dummy;
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};
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#endif
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/* ARGSUSED */
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int
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ogethostid(td, uap)
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struct thread *td;
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struct ogethostid_args *uap;
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{
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*(long *)(td->td_retval) = hostid;
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return (0);
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}
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#endif /* COMPAT_43 */
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#ifdef COMPAT_43
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#ifndef _SYS_SYSPROTO_H_
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struct osethostid_args {
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long hostid;
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};
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#endif
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/* ARGSUSED */
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int
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osethostid(td, uap)
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struct thread *td;
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struct osethostid_args *uap;
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{
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int error;
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error = priv_check(td, PRIV_SETHOSTID);
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if (error)
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return (error);
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mtx_lock(&Giant);
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hostid = uap->hostid;
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mtx_unlock(&Giant);
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return (0);
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}
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int
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oquota(td, uap)
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struct thread *td;
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struct oquota_args *uap;
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{
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return (ENOSYS);
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}
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#endif /* COMPAT_43 */
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/*
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* This is the FreeBSD-1.1 compatable uname(2) interface. These days it is
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* done in libc as a wrapper around a bunch of sysctl's. This must maintain
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* the old 1.1 binary ABI.
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*/
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#if SYS_NMLN != 32
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#error "FreeBSD-1.1 uname syscall has been broken"
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#endif
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#ifndef _SYS_SYSPROTO_H_
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struct uname_args {
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struct utsname *name;
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};
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#endif
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/* ARGSUSED */
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int
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uname(td, uap)
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struct thread *td;
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struct uname_args *uap;
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{
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int name[2], error;
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size_t len;
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char *s, *us;
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name[0] = CTL_KERN;
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name[1] = KERN_OSTYPE;
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len = sizeof (uap->name->sysname);
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mtx_lock(&Giant);
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error = userland_sysctl(td, name, 2, uap->name->sysname, &len,
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1, 0, 0, 0, 0);
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if (error)
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goto done2;
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subyte( uap->name->sysname + sizeof(uap->name->sysname) - 1, 0);
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name[1] = KERN_HOSTNAME;
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len = sizeof uap->name->nodename;
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error = userland_sysctl(td, name, 2, uap->name->nodename, &len,
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1, 0, 0, 0, 0);
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if (error)
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goto done2;
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subyte( uap->name->nodename + sizeof(uap->name->nodename) - 1, 0);
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name[1] = KERN_OSRELEASE;
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len = sizeof uap->name->release;
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error = userland_sysctl(td, name, 2, uap->name->release, &len,
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1, 0, 0, 0, 0);
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if (error)
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goto done2;
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subyte( uap->name->release + sizeof(uap->name->release) - 1, 0);
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/*
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name = KERN_VERSION;
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len = sizeof uap->name->version;
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error = userland_sysctl(td, name, 2, uap->name->version, &len,
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1, 0, 0, 0, 0);
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if (error)
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goto done2;
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subyte( uap->name->version + sizeof(uap->name->version) - 1, 0);
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*/
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/*
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* this stupid hackery to make the version field look like FreeBSD 1.1
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*/
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for(s = version; *s && *s != '#'; s++);
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for(us = uap->name->version; *s && *s != ':'; s++) {
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error = subyte( us++, *s);
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if (error)
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goto done2;
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}
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error = subyte( us++, 0);
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if (error)
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goto done2;
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name[0] = CTL_HW;
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name[1] = HW_MACHINE;
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len = sizeof uap->name->machine;
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error = userland_sysctl(td, name, 2, uap->name->machine, &len,
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1, 0, 0, 0, 0);
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if (error)
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goto done2;
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subyte( uap->name->machine + sizeof(uap->name->machine) - 1, 0);
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done2:
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mtx_unlock(&Giant);
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return (error);
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}
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#ifndef _SYS_SYSPROTO_H_
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struct getdomainname_args {
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char *domainname;
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int len;
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};
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#endif
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/* ARGSUSED */
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int
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getdomainname(td, uap)
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struct thread *td;
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struct getdomainname_args *uap;
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{
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char tmpdomainname[MAXHOSTNAMELEN];
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int domainnamelen;
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mtx_lock(&hostname_mtx);
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bcopy(domainname, tmpdomainname, sizeof(tmpdomainname));
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mtx_unlock(&hostname_mtx);
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domainnamelen = strlen(tmpdomainname) + 1;
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if ((u_int)uap->len > domainnamelen)
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uap->len = domainnamelen;
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return (copyout(tmpdomainname, uap->domainname, uap->len));
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}
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#ifndef _SYS_SYSPROTO_H_
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struct setdomainname_args {
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char *domainname;
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int len;
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};
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#endif
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/* ARGSUSED */
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int
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setdomainname(td, uap)
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struct thread *td;
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struct setdomainname_args *uap;
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{
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char tmpdomainname[MAXHOSTNAMELEN];
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int error, domainnamelen;
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error = priv_check(td, PRIV_SETDOMAINNAME);
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if (error)
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return (error);
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if ((u_int)uap->len > sizeof(tmpdomainname) - 1)
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return (EINVAL);
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domainnamelen = uap->len;
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error = copyin(uap->domainname, tmpdomainname, uap->len);
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if (error == 0) {
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tmpdomainname[domainnamelen] = 0;
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mtx_lock(&hostname_mtx);
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bcopy(tmpdomainname, domainname, sizeof(domainname));
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mtx_unlock(&hostname_mtx);
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}
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return (error);
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}
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