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. 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: src/sys/kern/kern_xxx.c,v 1.31 1999/08/28 00:46:15 peter Exp $
     * $DragonFly: src/sys/kern/kern_xxx.c,v 1.10 2006/06/05 07:26:10 dillon Exp $
     */
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/sysproto.h>
    #include <sys/kernel.h>
    #include <sys/proc.h>
    #include <sys/priv.h>
    #include <sys/sysctl.h>
    #include <sys/utsname.h>
    
    struct lwkt_token domain_token = LWKT_TOKEN_INITIALIZER(domain_token);
    
    int
    sys_uname(struct uname_args *uap)
    {
            int name[2], rtval;
            size_t len;
            char *s, *us;
    
            name[0] = CTL_KERN;
            name[1] = KERN_OSTYPE;
            len = sizeof uap->name->sysname;
            rtval = userland_sysctl(name, 2, uap->name->sysname, &len, 
                                    1, 0, 0, 0);
            if (rtval)
                    goto done;
            subyte(uap->name->sysname + sizeof(uap->name->sysname) - 1, 0);
    
            name[1] = KERN_HOSTNAME;
            len = sizeof uap->name->nodename;
            rtval = userland_sysctl(name, 2, uap->name->nodename, &len, 
                                    1, 0, 0, 0);
            if (rtval)
                    goto done;
            subyte(uap->name->nodename + sizeof(uap->name->nodename) - 1, 0);
    
            name[1] = KERN_OSRELEASE;
            len = sizeof uap->name->release;
            rtval = userland_sysctl(name, 2, uap->name->release, &len, 
                                    1, 0, 0, 0);
            if (rtval)
                    goto done;
            subyte(uap->name->release + sizeof(uap->name->release) - 1, 0);
    
    /*
            name = KERN_VERSION;
            len = sizeof uap->name->version;
            rtval = userland_sysctl(name, 2, uap->name->version, &len, 
                                    1, 0, 0, 0);
            if (rtval)
                    goto done;
            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++) {
                    rtval = subyte( us++, *s);
                    if (rtval)
                            goto done;
            }
            rtval = subyte( us++, 0);
            if (rtval)
                    goto done;
   
           name[0] = CTL_HW;
           name[1] = HW_MACHINE;
           len = sizeof uap->name->machine;
           rtval = userland_sysctl(name, 2, uap->name->machine, &len, 
                                   1, 0, 0, 0);
           if (rtval)
                   goto done;
           rtval = subyte(uap->name->machine + sizeof(uap->name->machine) - 1, 0);
   done:
           return rtval;
   }
   
   int
   sys_getdomainname(struct getdomainname_args *uap)
   {
           int domainnamelen;
           int error;
   
           lwkt_gettoken_shared(&domain_token);
           domainnamelen = strlen(domainname) + 1;
           if ((u_int)uap->len > domainnamelen + 1)
                   uap->len = domainnamelen + 1;
           error = copyout(domainname, uap->domainname, uap->len);
           lwkt_reltoken(&domain_token);
           return (error);
   }
   
   int
   sys_setdomainname(struct setdomainname_args *uap)
   {
           struct thread *td = curthread;
           int error, domainnamelen;
   
           if ((error = priv_check(td, PRIV_SETDOMAINNAME)))
                   return (error);
           if ((u_int)uap->len > sizeof(domainname) - 1)
                   return EINVAL;
           lwkt_gettoken(&domain_token);
   
           domainnamelen = uap->len;
           error = copyin(uap->domainname, domainname, uap->len);
           domainname[domainnamelen] = 0;
   
           lwkt_reltoken(&domain_token);
           return (error);
   }

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