sys/emulation/43bsd/43bsd_hostinfo.c

   1 /*
   2  * 43BSD_HOSTINFO.C     - 4.3BSD compatibility host info syscalls
   3  *
   4  * Copyright (c) 1982, 1986, 1989, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. All advertising materials mentioning features or use of this software
  16  *    must display the following acknowledgement:
  17  *      This product includes software developed by the University of
  18  *      California, Berkeley and its contributors.
  19  * 4. Neither the name of the University nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  *
  35  * $DragonFly: src/sys/emulation/43bsd/43bsd_hostinfo.c,v 1.4 2006/09/05 00:55:44 dillon Exp $
  36  *      from: DragonFly kern/kern_xxx.c,v 1.7
  37  *      from: DragonFly kern/kern_sysctl.c,v 1.12
  38  *
  39  * These syscalls used to live in kern/kern_xxx.c and kern/kern_sysctl.c.
  40  */
  41
  42 #include "opt_compat.h"
  43
  44 #include <sys/param.h>
  45 #include <sys/systm.h>
  46 #include <sys/sysproto.h>
  47 #include <sys/kernel.h>
  48 #include <sys/proc.h>
  49 #include <sys/socket.h>
  50 #include <sys/sysctl.h>
  51 #include <vm/vm_param.h>
  52
  53 int
  54 sys_ogethostname(struct gethostname_args *uap)
  55 {
  56         size_t len;
  57         char *hostname;
  58         int error, name[2];
  59
  60         name[0] = CTL_KERN;
  61         name[1] = KERN_HOSTNAME;
  62         len = MIN(uap->len, MAXHOSTNAMELEN);
  63         hostname = kmalloc(MAXHOSTNAMELEN, M_TEMP, M_WAITOK);
  64
  65         error = kernel_sysctl(name, 2, hostname, &len, NULL, 0, NULL);
  66
  67         if (error == 0)
  68                 error = copyout(hostname, uap->hostname, len);
  69
  70         kfree(hostname, M_TEMP);
  71         return (error);
  72 }
  73
  74 int
  75 sys_osethostname(struct sethostname_args *uap)
  76 {
  77         struct thread *td = curthread;
  78         struct proc *p = td->td_proc;
  79         size_t len;
  80         char *hostname;
  81         int name[2];
  82         int error;
  83
  84         KKASSERT(p);
  85         name[0] = CTL_KERN;
  86         name[1] = KERN_HOSTNAME;
  87         error = suser_cred(p->p_ucred, PRISON_ROOT);
  88         if (error)
  89                 return (error);
  90         len = MIN(uap->len, MAXHOSTNAMELEN);
  91         hostname = kmalloc(MAXHOSTNAMELEN, M_TEMP, M_WAITOK);
  92
  93         error = copyin(uap->hostname, hostname, len);
  94         if (error) {
  95                 kfree(hostname, M_TEMP);
  96                 return (error);
  97         }
  98
  99         error = kernel_sysctl(name, 2, NULL, 0, hostname, len, NULL);
 100
 101         kfree(hostname, M_TEMP);
 102         return (error);
 103 }
 104
 105 int
 106 sys_ogethostid(struct ogethostid_args *uap)
 107 {
 108         uap->sysmsg_lresult = hostid;
 109         return (0);
 110 }
 111
 112 int
 113 sys_osethostid(struct osethostid_args *uap)
 114 {
 115         struct thread *td = curthread;
 116         int error;
 117
 118         error = suser(td);
 119         if (error)
 120                 return (error);
 121         hostid = uap->hostid;
 122         return (0);
 123 }
 124
 125 int
 126 sys_oquota(struct oquota_args *uap)
 127 {
 128         return (ENOSYS);
 129 }
 130
 131 #define KINFO_PROC              (0<<8)
 132 #define KINFO_RT                (1<<8)
 133 #define KINFO_VNODE             (2<<8)
 134 #define KINFO_FILE              (3<<8)
 135 #define KINFO_METER             (4<<8)
 136 #define KINFO_LOADAVG           (5<<8)
 137 #define KINFO_CLOCKRATE         (6<<8)
 138
 139 /* Non-standard BSDI extension - only present on their 4.3 net-2 releases */
 140 #define KINFO_BSDI_SYSINFO      (101<<8)
 141
 142 /*
 143  * XXX this is bloat, but I hope it's better here than on the potentially
 144  * limited kernel stack...  -Peter
 145  */
 146
 147 static struct {
 148         int     bsdi_machine;           /* "i386" on BSD/386 */
 149 /*      ^^^ this is an offset to the string, relative to the struct start */
 150         char    *pad0;
 151         long    pad1;
 152         long    pad2;
 153         long    pad3;
 154         u_long  pad4;
 155         u_long  pad5;
 156         u_long  pad6;
 157
 158         int     bsdi_ostype;            /* "BSD/386" on BSD/386 */
 159         int     bsdi_osrelease;         /* "1.1" on BSD/386 */
 160         long    pad7;
 161         long    pad8;
 162         char    *pad9;
 163
 164         long    pad10;
 165         long    pad11;
 166         int     pad12;
 167         long    pad13;
 168         quad_t  pad14;
 169         long    pad15;
 170
 171         struct  timeval pad16;
 172         /* we dont set this, because BSDI's uname used gethostname() instead */
 173         int     bsdi_hostname;          /* hostname on BSD/386 */
 174
 175         /* the actual string data is appended here */
 176
 177 } bsdi_si;
 178 /*
 179  * this data is appended to the end of the bsdi_si structure during copyout.
 180  * The "char *" offsets are relative to the base of the bsdi_si struct.
 181  * This contains "FreeBSD\02.0-BUILT-nnnnnn\0i386\0", and these strings
 182  * should not exceed the length of the buffer here... (or else!! :-)
 183  */
 184 static char bsdi_strings[80];   /* It had better be less than this! */
 185
 186 int
 187 sys_ogetkerninfo(struct getkerninfo_args *uap)
 188 {
 189         int error, name[6];
 190         size_t size;
 191         u_int needed = 0;
 192
 193         switch (uap->op & 0xff00) {
 194
 195         case KINFO_RT:
 196                 name[0] = CTL_NET;
 197                 name[1] = PF_ROUTE;
 198                 name[2] = 0;
 199                 name[3] = (uap->op & 0xff0000) >> 16;
 200                 name[4] = uap->op & 0xff;
 201                 name[5] = uap->arg;
 202                 error = userland_sysctl(name, 6, uap->where, uap->size,
 203                         0, 0, 0, &size);
 204                 break;
 205
 206         case KINFO_VNODE:
 207                 name[0] = CTL_KERN;
 208                 name[1] = KERN_VNODE;
 209                 error = userland_sysctl(name, 2, uap->where, uap->size,
 210                         0, 0, 0, &size);
 211                 break;
 212
 213         case KINFO_PROC:
 214                 name[0] = CTL_KERN;
 215                 name[1] = KERN_PROC;
 216                 name[2] = uap->op & 0xff;
 217                 name[3] = uap->arg;
 218                 error = userland_sysctl(name, 4, uap->where, uap->size,
 219                         0, 0, 0, &size);
 220                 break;
 221
 222         case KINFO_FILE:
 223                 name[0] = CTL_KERN;
 224                 name[1] = KERN_FILE;
 225                 error = userland_sysctl(name, 2, uap->where, uap->size,
 226                         0, 0, 0, &size);
 227                 break;
 228
 229         case KINFO_METER:
 230                 name[0] = CTL_VM;
 231                 name[1] = VM_METER;
 232                 error = userland_sysctl(name, 2, uap->where, uap->size,
 233                         0, 0, 0, &size);
 234                 break;
 235
 236         case KINFO_LOADAVG:
 237                 name[0] = CTL_VM;
 238                 name[1] = VM_LOADAVG;
 239                 error = userland_sysctl(name, 2, uap->where, uap->size,
 240                         0, 0, 0, &size);
 241                 break;
 242
 243         case KINFO_CLOCKRATE:
 244                 name[0] = CTL_KERN;
 245                 name[1] = KERN_CLOCKRATE;
 246                 error = userland_sysctl(name, 2, uap->where, uap->size,
 247                         0, 0, 0, &size);
 248                 break;
 249
 250         case KINFO_BSDI_SYSINFO: {
 251                 /*
 252                  * this is pretty crude, but it's just enough for uname()
 253                  * from BSDI's 1.x libc to work.
 254                  * *size gives the size of the buffer before the call, and
 255                  * the amount of data copied after a successful call.
 256                  * If successful, the return value is the amount of data
 257                  * available, which can be larger than *size.
 258                  *
 259                  * BSDI's 2.x product apparently fails with ENOMEM if
 260                  * *size is too small.
 261                  */
 262
 263                 u_int left;
 264                 char *s;
 265
 266                 bzero((char *)&bsdi_si, sizeof(bsdi_si));
 267                 bzero(bsdi_strings, sizeof(bsdi_strings));
 268
 269                 s = bsdi_strings;
 270
 271                 bsdi_si.bsdi_ostype = (s - bsdi_strings) + sizeof(bsdi_si);
 272                 strcpy(s, ostype);
 273                 s += strlen(s) + 1;
 274
 275                 bsdi_si.bsdi_osrelease = (s - bsdi_strings) + sizeof(bsdi_si);
 276                 strcpy(s, osrelease);
 277                 s += strlen(s) + 1;
 278
 279                 bsdi_si.bsdi_machine = (s - bsdi_strings) + sizeof(bsdi_si);
 280                 strcpy(s, machine);
 281                 s += strlen(s) + 1;
 282
 283                 needed = sizeof(bsdi_si) + (s - bsdi_strings);
 284
 285                 if (uap->where == NULL || (uap->size == NULL)) {
 286                         /* process is asking how much buffer to supply.. */
 287                         size = needed;
 288                         error = 0;
 289                         break;
 290                 }
 291
 292                 if ((error = copyin(uap->size, &size, sizeof(size))) != 0)
 293                                 break;
 294
 295                 /* if too much buffer supplied, trim it down */
 296                 if (size > needed)
 297                         size = needed;
 298
 299                 /* how much of the buffer is remaining */
 300                 left = size;
 301
 302                 if ((error = copyout((char *)&bsdi_si, uap->where, left)) != 0)
 303                         break;
 304
 305                 /* is there any point in continuing? */
 306                 if (left > sizeof(bsdi_si)) {
 307                         left -= sizeof(bsdi_si);
 308                         error = copyout(&bsdi_strings,
 309                                         uap->where + sizeof(bsdi_si), left);
 310                 }
 311                 break;
 312         }
 313
 314         default:
 315                 return (EOPNOTSUPP);
 316         }
 317         if (error)
 318                 return (error);
 319         uap->sysmsg_result = size;
 320         if (uap->size)
 321                 error = copyout((caddr_t)&size, (caddr_t)uap->size,
 322                     sizeof(size));
 323         return (error);
 324 }