mirror of
https://git.FreeBSD.org/src.git
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76ca6f88da
The system hostname is now stored in prison0, and the global variable "hostname" has been removed, as has the hostname_mtx mutex. Jails may have their own host information, or they may inherit it from the parent/system. The proper way to read the hostname is via getcredhostname(), which will copy either the hostname associated with the passed cred, or the system hostname if you pass NULL. The system hostname can still be accessed directly (and without locking) at prison0.pr_host, but that should be avoided where possible. The "similar information" referred to is domainname, hostid, and hostuuid, which have also become prison parameters and had their associated global variables removed. Approved by: bz (mentor)
472 lines
11 KiB
C
472 lines
11 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/socket.h>
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#include <sys/sysctl.h>
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#include <sys/utsname.h>
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#include <vm/vm_param.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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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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return (userland_sysctl(td, name, 2, uap->hostname, &len,
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1, 0, 0, 0, 0));
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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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name[0] = CTL_KERN;
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name[1] = KERN_HOSTNAME;
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return (userland_sysctl(td, name, 2, 0, 0, 0, uap->hostname,
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uap->len, 0, 0));
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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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size_t len = sizeof(long);
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int name[2];
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name[0] = CTL_KERN;
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name[1] = KERN_HOSTID;
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return (kernel_sysctl(td, name, 2, (long *)td->td_retval, &len,
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NULL, 0, NULL, 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 name[2];
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name[0] = CTL_KERN;
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name[1] = KERN_HOSTID;
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return (kernel_sysctl(td, name, 2, NULL, NULL, &uap->hostid,
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sizeof(uap->hostid), NULL, 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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#define KINFO_PROC (0<<8)
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#define KINFO_RT (1<<8)
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#define KINFO_VNODE (2<<8)
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#define KINFO_FILE (3<<8)
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#define KINFO_METER (4<<8)
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#define KINFO_LOADAVG (5<<8)
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#define KINFO_CLOCKRATE (6<<8)
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/* Non-standard BSDI extension - only present on their 4.3 net-2 releases */
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#define KINFO_BSDI_SYSINFO (101<<8)
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/*
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* XXX this is bloat, but I hope it's better here than on the potentially
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* limited kernel stack... -Peter
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*/
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static struct {
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int bsdi_machine; /* "i386" on BSD/386 */
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/* ^^^ this is an offset to the string, relative to the struct start */
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char *pad0;
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long pad1;
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long pad2;
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long pad3;
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u_long pad4;
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u_long pad5;
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u_long pad6;
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int bsdi_ostype; /* "BSD/386" on BSD/386 */
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int bsdi_osrelease; /* "1.1" on BSD/386 */
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long pad7;
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long pad8;
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char *pad9;
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long pad10;
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long pad11;
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int pad12;
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long pad13;
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quad_t pad14;
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long pad15;
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struct timeval pad16;
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/* we dont set this, because BSDI's uname used gethostname() instead */
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int bsdi_hostname; /* hostname on BSD/386 */
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/* the actual string data is appended here */
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} bsdi_si;
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/*
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* this data is appended to the end of the bsdi_si structure during copyout.
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* The "char *" offsets are relative to the base of the bsdi_si struct.
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* This contains "FreeBSD\02.0-BUILT-nnnnnn\0i386\0", and these strings
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* should not exceed the length of the buffer here... (or else!! :-)
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*/
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static char bsdi_strings[80]; /* It had better be less than this! */
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#ifndef _SYS_SYSPROTO_H_
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struct getkerninfo_args {
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int op;
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char *where;
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size_t *size;
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int arg;
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};
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#endif
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int
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ogetkerninfo(struct thread *td, struct getkerninfo_args *uap)
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{
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int error, name[6];
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size_t size;
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u_int needed = 0;
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switch (uap->op & 0xff00) {
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case KINFO_RT:
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name[0] = CTL_NET;
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name[1] = PF_ROUTE;
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name[2] = 0;
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name[3] = (uap->op & 0xff0000) >> 16;
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name[4] = uap->op & 0xff;
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name[5] = uap->arg;
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error = userland_sysctl(td, name, 6, uap->where, uap->size,
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0, 0, 0, &size, 0);
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break;
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case KINFO_VNODE:
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name[0] = CTL_KERN;
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name[1] = KERN_VNODE;
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error = userland_sysctl(td, name, 2, uap->where, uap->size,
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0, 0, 0, &size, 0);
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break;
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case KINFO_PROC:
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name[0] = CTL_KERN;
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name[1] = KERN_PROC;
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name[2] = uap->op & 0xff;
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name[3] = uap->arg;
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error = userland_sysctl(td, name, 4, uap->where, uap->size,
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0, 0, 0, &size, 0);
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break;
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case KINFO_FILE:
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name[0] = CTL_KERN;
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name[1] = KERN_FILE;
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error = userland_sysctl(td, name, 2, uap->where, uap->size,
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0, 0, 0, &size, 0);
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break;
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case KINFO_METER:
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name[0] = CTL_VM;
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name[1] = VM_TOTAL;
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error = userland_sysctl(td, name, 2, uap->where, uap->size,
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0, 0, 0, &size, 0);
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break;
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case KINFO_LOADAVG:
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name[0] = CTL_VM;
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name[1] = VM_LOADAVG;
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error = userland_sysctl(td, name, 2, uap->where, uap->size,
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0, 0, 0, &size, 0);
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break;
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case KINFO_CLOCKRATE:
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name[0] = CTL_KERN;
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name[1] = KERN_CLOCKRATE;
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error = userland_sysctl(td, name, 2, uap->where, uap->size,
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0, 0, 0, &size, 0);
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break;
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case KINFO_BSDI_SYSINFO: {
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/*
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* this is pretty crude, but it's just enough for uname()
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* from BSDI's 1.x libc to work.
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*
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* *size gives the size of the buffer before the call, and
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* the amount of data copied after a successful call.
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* If successful, the return value is the amount of data
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* available, which can be larger than *size.
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*
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* BSDI's 2.x product apparently fails with ENOMEM if *size
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* is too small.
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*/
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u_int left;
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char *s;
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bzero((char *)&bsdi_si, sizeof(bsdi_si));
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bzero(bsdi_strings, sizeof(bsdi_strings));
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s = bsdi_strings;
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bsdi_si.bsdi_ostype = (s - bsdi_strings) + sizeof(bsdi_si);
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strcpy(s, ostype);
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s += strlen(s) + 1;
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bsdi_si.bsdi_osrelease = (s - bsdi_strings) + sizeof(bsdi_si);
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strcpy(s, osrelease);
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s += strlen(s) + 1;
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bsdi_si.bsdi_machine = (s - bsdi_strings) + sizeof(bsdi_si);
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strcpy(s, machine);
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s += strlen(s) + 1;
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needed = sizeof(bsdi_si) + (s - bsdi_strings);
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if ((uap->where == NULL) || (uap->size == NULL)) {
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/* process is asking how much buffer to supply.. */
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size = needed;
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error = 0;
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break;
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}
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if ((error = copyin(uap->size, &size, sizeof(size))) != 0)
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break;
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/* if too much buffer supplied, trim it down */
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if (size > needed)
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size = needed;
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/* how much of the buffer is remaining */
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left = size;
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if ((error = copyout((char *)&bsdi_si, uap->where, left)) != 0)
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break;
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/* is there any point in continuing? */
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if (left > sizeof(bsdi_si)) {
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left -= sizeof(bsdi_si);
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error = copyout(&bsdi_strings,
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uap->where + sizeof(bsdi_si), left);
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}
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break;
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}
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default:
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error = EOPNOTSUPP;
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break;
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}
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if (error == 0) {
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td->td_retval[0] = needed ? needed : size;
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if (uap->size) {
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error = copyout(&size, uap->size, sizeof(size));
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}
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}
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return (error);
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}
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#endif /* COMPAT_43 */
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#ifdef COMPAT_FREEBSD4
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/*
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* This is the FreeBSD-1.1 compatible 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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freebsd4_uname(struct thread *td, struct freebsd4_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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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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return (error);
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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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return (error);
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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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return (error);
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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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return (error);
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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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return (error);
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}
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error = subyte( us++, 0);
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if (error)
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return (error);
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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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return (error);
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subyte( uap->name->machine + sizeof(uap->name->machine) - 1, 0);
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return (0);
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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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freebsd4_getdomainname(struct thread *td,
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struct freebsd4_getdomainname_args *uap)
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{
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int name[2];
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size_t len = uap->len;
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name[0] = CTL_KERN;
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name[1] = KERN_NISDOMAINNAME;
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return (userland_sysctl(td, name, 2, uap->domainname, &len,
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1, 0, 0, 0, 0));
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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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freebsd4_setdomainname(struct thread *td,
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struct freebsd4_setdomainname_args *uap)
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{
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int name[2];
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name[0] = CTL_KERN;
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name[1] = KERN_NISDOMAINNAME;
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return (userland_sysctl(td, name, 2, 0, 0, 0, uap->domainname,
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uap->len, 0, 0));
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}
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#endif /* COMPAT_FREEBSD4 */
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