FreeBSD/Linux Kernel Cross Reference
sys/kern/kern_xxx.c

     /*
      * Copyright (c) 1982, 1986, 1989, 1993
      *      The Regents of the University of California.  All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
      * 1. Redistributions of source code must retain the above copyright
      *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *      This product includes software developed by the University of
     *      California, Berkeley and its contributors.
     * 4. Neither the name of the University nor the names of its contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     *      @(#)kern_xxx.c  8.2 (Berkeley) 11/14/93
     * $FreeBSD: releng/5.0/sys/kern/kern_xxx.c 99012 2002-06-29 02:00:02Z alfred $
     */
    
    #include "opt_compat.h"
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/sysproto.h>
    #include <sys/kernel.h>
    #include <sys/proc.h>
    #include <sys/lock.h>
    #include <sys/mutex.h>
    #include <sys/sysctl.h>
    #include <sys/utsname.h>
    
    
    #if defined(COMPAT_43) || defined(COMPAT_SUNOS)
    
    #ifndef _SYS_SYSPROTO_H_
    struct gethostname_args {
            char    *hostname;
            u_int   len;
    };
    #endif
    /*
     * MPSAFE
     */
    /* ARGSUSED */
    int
    ogethostname(td, uap)
            struct thread *td;
            struct gethostname_args *uap;
    {
            int name[2];
            int error;
            size_t len = uap->len;
    
            name[0] = CTL_KERN;
            name[1] = KERN_HOSTNAME;
            mtx_lock(&Giant);
            error = userland_sysctl(td, name, 2, uap->hostname, &len, 1, 0, 0, 0);
            mtx_unlock(&Giant);
            return(error);
    }
    
    #ifndef _SYS_SYSPROTO_H_
    struct sethostname_args {
            char    *hostname;
            u_int   len;
    };
    #endif
    /*
     * MPSAFE
     */
    /* ARGSUSED */
    int
    osethostname(td, uap)
            struct thread *td;
            register struct sethostname_args *uap;
    {
            int name[2];
            int error;
    
            name[0] = CTL_KERN;
            name[1] = KERN_HOSTNAME;
            mtx_lock(&Giant);
           if ((error = suser_cred(td->td_ucred, PRISON_ROOT)) == 0) {
                   error = userland_sysctl(td, name, 2, 0, 0, 0,
                       uap->hostname, uap->len, 0);
           }
           mtx_unlock(&Giant);
           return (error);
   }
   
   #ifndef _SYS_SYSPROTO_H_
   struct ogethostid_args {
           int     dummy;
   };
   #endif
   /*
    * MPSAFE
    */
   /* ARGSUSED */
   int
   ogethostid(td, uap)
           struct thread *td;
           struct ogethostid_args *uap;
   {
   
           *(long *)(td->td_retval) = hostid;
           return (0);
   }
   #endif /* COMPAT_43 || COMPAT_SUNOS */
   
   #ifdef COMPAT_43
   #ifndef _SYS_SYSPROTO_H_
   struct osethostid_args {
           long    hostid;
   };
   #endif
   /*
    * MPSAFE
    */
   /* ARGSUSED */
   int
   osethostid(td, uap)
           struct thread *td;
           struct osethostid_args *uap;
   {
           int error;
   
           mtx_lock(&Giant);
           if ((error = suser(td)))
                   hostid = uap->hostid;
           mtx_unlock(&Giant);
           return (error);
   }
   
   /*
    * MPSAFE
    */
   int
   oquota(td, uap)
           struct thread *td;
           struct oquota_args *uap;
   {
           return (ENOSYS);
   }
   #endif /* COMPAT_43 */
   
   /*
    * This is the FreeBSD-1.1 compatable uname(2) interface.  These
    * days it is done in libc as a wrapper around a bunch of sysctl's.
    * This must maintain the old 1.1 binary ABI.
    */
   #if SYS_NMLN != 32
   #error "FreeBSD-1.1 uname syscall has been broken"
   #endif
   #ifndef _SYS_SYSPROTO_H_
   struct uname_args {
           struct utsname  *name;
   };
   #endif
   
   /*
    * MPSAFE
    */
   /* ARGSUSED */
   int
   uname(td, uap)
           struct thread *td;
           struct uname_args *uap;
   {
           int name[2], error;
           size_t len;
           char *s, *us;
   
           name[0] = CTL_KERN;
           name[1] = KERN_OSTYPE;
           len = sizeof (uap->name->sysname);
           mtx_lock(&Giant);
           error = userland_sysctl(td, name, 2, uap->name->sysname, &len, 
                   1, 0, 0, 0);
           if (error)
                   goto done2;
           subyte( uap->name->sysname + sizeof(uap->name->sysname) - 1, 0);
   
           name[1] = KERN_HOSTNAME;
           len = sizeof uap->name->nodename;
           error = userland_sysctl(td, name, 2, uap->name->nodename, &len, 
                   1, 0, 0, 0);
           if (error)
                   goto done2;
           subyte( uap->name->nodename + sizeof(uap->name->nodename) - 1, 0);
   
           name[1] = KERN_OSRELEASE;
           len = sizeof uap->name->release;
           error = userland_sysctl(td, name, 2, uap->name->release, &len, 
                   1, 0, 0, 0);
           if (error)
                   goto done2;
           subyte( uap->name->release + sizeof(uap->name->release) - 1, 0);
   
   /*
           name = KERN_VERSION;
           len = sizeof uap->name->version;
           error = userland_sysctl(td, name, 2, uap->name->version, &len, 
                   1, 0, 0, 0);
           if (error)
                   goto done2;
           subyte( uap->name->version + sizeof(uap->name->version) - 1, 0);
   */
   
   /*
    * this stupid hackery to make the version field look like FreeBSD 1.1
    */
           for(s = version; *s && *s != '#'; s++);
   
           for(us = uap->name->version; *s && *s != ':'; s++) {
                   error = subyte( us++, *s);
                   if (error)
                           goto done2;
           }
           error = subyte( us++, 0);
           if (error)
                   goto done2;
   
           name[0] = CTL_HW;
           name[1] = HW_MACHINE;
           len = sizeof uap->name->machine;
           error = userland_sysctl(td, name, 2, uap->name->machine, &len, 
                   1, 0, 0, 0);
           if (error)
                   goto done2;
           subyte( uap->name->machine + sizeof(uap->name->machine) - 1, 0);
   done2:
           mtx_unlock(&Giant);
           return (error);
   }
   
   #ifndef _SYS_SYSPROTO_H_
   struct getdomainname_args {
           char    *domainname;
           int     len;
   };
   #endif
   
   /*
    * MPSAFE
    */
   /* ARGSUSED */
   int
   getdomainname(td, uap)
           struct thread *td;
           struct getdomainname_args *uap;
   {
           int domainnamelen;
           int error;
   
           mtx_lock(&Giant);
           domainnamelen = strlen(domainname) + 1;
           if ((u_int)uap->len > domainnamelen + 1)
                   uap->len = domainnamelen + 1;
           error = copyout(domainname, uap->domainname, uap->len);
           mtx_unlock(&Giant);
           return (error);
   }
   
   #ifndef _SYS_SYSPROTO_H_
   struct setdomainname_args {
           char    *domainname;
           int     len;
   };
   #endif
   
   /*
    * MPSAFE
    */
   /* ARGSUSED */
   int
   setdomainname(td, uap)
           struct thread *td;
           struct setdomainname_args *uap;
   {
           int error, domainnamelen;
   
           mtx_lock(&Giant);
           if ((error = suser(td)))
                   goto done2;
           if ((u_int)uap->len > sizeof (domainname) - 1) {
                   error = EINVAL;
                   goto done2;
           }
           domainnamelen = uap->len;
           error = copyin(uap->domainname, domainname, uap->len);
           domainname[domainnamelen] = 0;
   done2:
           mtx_unlock(&Giant);
           return (error);
   }
   

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