The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

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

Version: -  FREEBSD  -  FREEBSD-12-STABLE  -  FREEBSD-12-0  -  FREEBSD-11-STABLE  -  FREEBSD-11-2  -  FREEBSD-11-1  -  FREEBSD-11-0  -  FREEBSD-10-STABLE  -  FREEBSD-10-4  -  FREEBSD-10-3  -  FREEBSD-10-2  -  FREEBSD-10-1  -  FREEBSD-10-0  -  FREEBSD-9-STABLE  -  FREEBSD-9-3  -  FREEBSD-9-2  -  FREEBSD-9-1  -  FREEBSD-9-0  -  FREEBSD-8-STABLE  -  FREEBSD-8-4  -  FREEBSD-8-3  -  FREEBSD-8-2  -  FREEBSD-8-1  -  FREEBSD-8-0  -  FREEBSD-7-STABLE  -  FREEBSD-7-4  -  FREEBSD-7-3  -  FREEBSD-7-2  -  FREEBSD-7-1  -  FREEBSD-7-0  -  FREEBSD-6-STABLE  -  FREEBSD-6-4  -  FREEBSD-6-3  -  FREEBSD-6-2  -  FREEBSD-6-1  -  FREEBSD-6-0  -  FREEBSD-5-STABLE  -  FREEBSD-5-5  -  FREEBSD-5-4  -  FREEBSD-5-3  -  FREEBSD-5-2  -  FREEBSD-5-1  -  FREEBSD-5-0  -  FREEBSD-4-STABLE  -  FREEBSD-3-STABLE  -  FREEBSD22  -  linux-2.6  -  linux-2.4.22  -  MK83  -  MK84  -  PLAN9  -  DFBSD  -  NETBSD  -  NETBSD5  -  NETBSD4  -  NETBSD3  -  NETBSD20  -  OPENBSD  -  xnu-517  -  xnu-792  -  xnu-792.6.70  -  xnu-1228  -  xnu-1456.1.26  -  xnu-1699.24.8  -  xnu-2050.18.24  -  OPENSOLARIS  -  minix-3-1-1 
SearchContext: -  none  -  3  -  10 

    1 /*-
    2  * Copyright (c) 1982, 1986, 1989, 1993
    3  *      The Regents of the University of California.  All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  * 4. Neither the name of the University nor the names of its contributors
   14  *    may be used to endorse or promote products derived from this software
   15  *    without specific prior written permission.
   16  *
   17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   27  * SUCH DAMAGE.
   28  *
   29  *      @(#)kern_xxx.c  8.2 (Berkeley) 11/14/93
   30  */
   31 
   32 #include <sys/cdefs.h>
   33 __FBSDID("$FreeBSD$");
   34 
   35 #include "opt_compat.h"
   36 
   37 #include <sys/param.h>
   38 #include <sys/systm.h>
   39 #include <sys/sysproto.h>
   40 #include <sys/kernel.h>
   41 #include <sys/priv.h>
   42 #include <sys/proc.h>
   43 #include <sys/lock.h>
   44 #include <sys/mutex.h>
   45 #include <sys/socket.h>
   46 #include <sys/sysctl.h>
   47 #include <sys/utsname.h>
   48 
   49 #include <vm/vm_param.h>
   50 
   51 #if defined(COMPAT_43)
   52 
   53 #ifndef _SYS_SYSPROTO_H_
   54 struct gethostname_args {
   55         char    *hostname;
   56         u_int   len;
   57 };
   58 #endif
   59 /* ARGSUSED */
   60 int
   61 ogethostname(td, uap)
   62         struct thread *td;
   63         struct gethostname_args *uap;
   64 {
   65         int name[2];
   66         size_t len = uap->len;
   67 
   68         name[0] = CTL_KERN;
   69         name[1] = KERN_HOSTNAME;
   70         return (userland_sysctl(td, name, 2, uap->hostname, &len,
   71             1, 0, 0, 0, 0));
   72 }
   73 
   74 #ifndef _SYS_SYSPROTO_H_
   75 struct sethostname_args {
   76         char    *hostname;
   77         u_int   len;
   78 };
   79 #endif
   80 /* ARGSUSED */
   81 int
   82 osethostname(td, uap)
   83         struct thread *td;
   84         register struct sethostname_args *uap;
   85 {
   86         int name[2];
   87 
   88         name[0] = CTL_KERN;
   89         name[1] = KERN_HOSTNAME;
   90         return (userland_sysctl(td, name, 2, 0, 0, 0, uap->hostname,
   91             uap->len, 0, 0));
   92 }
   93 
   94 #ifndef _SYS_SYSPROTO_H_
   95 struct ogethostid_args {
   96         int     dummy;
   97 };
   98 #endif
   99 /* ARGSUSED */
  100 int
  101 ogethostid(td, uap)
  102         struct thread *td;
  103         struct ogethostid_args *uap;
  104 {
  105 
  106         *(long *)(td->td_retval) = hostid;
  107         return (0);
  108 }
  109 #endif /* COMPAT_43 */
  110 
  111 #ifdef COMPAT_43
  112 #ifndef _SYS_SYSPROTO_H_
  113 struct osethostid_args {
  114         long    hostid;
  115 };
  116 #endif
  117 /* ARGSUSED */
  118 int
  119 osethostid(td, uap)
  120         struct thread *td;
  121         struct osethostid_args *uap;
  122 {
  123         int error;
  124 
  125         error = priv_check(td, PRIV_SETHOSTID);
  126         if (error)
  127                 return (error);
  128         mtx_lock(&Giant);
  129         hostid = uap->hostid;
  130         mtx_unlock(&Giant);
  131         return (0);
  132 }
  133 
  134 int
  135 oquota(td, uap)
  136         struct thread *td;
  137         struct oquota_args *uap;
  138 {
  139 
  140         return (ENOSYS);
  141 }
  142 
  143 #define KINFO_PROC              (0<<8)
  144 #define KINFO_RT                (1<<8)
  145 #define KINFO_VNODE             (2<<8)
  146 #define KINFO_FILE              (3<<8)
  147 #define KINFO_METER             (4<<8)
  148 #define KINFO_LOADAVG           (5<<8)
  149 #define KINFO_CLOCKRATE         (6<<8)
  150 
  151 /* Non-standard BSDI extension - only present on their 4.3 net-2 releases */
  152 #define KINFO_BSDI_SYSINFO      (101<<8)
  153 
  154 /*
  155  * XXX this is bloat, but I hope it's better here than on the potentially
  156  * limited kernel stack...  -Peter
  157  */
  158 
  159 static struct {
  160         int     bsdi_machine;           /* "i386" on BSD/386 */
  161 /*      ^^^ this is an offset to the string, relative to the struct start */
  162         char    *pad0;
  163         long    pad1;
  164         long    pad2;
  165         long    pad3;
  166         u_long  pad4;
  167         u_long  pad5;
  168         u_long  pad6;
  169 
  170         int     bsdi_ostype;            /* "BSD/386" on BSD/386 */
  171         int     bsdi_osrelease;         /* "1.1" on BSD/386 */
  172         long    pad7;
  173         long    pad8;
  174         char    *pad9;
  175 
  176         long    pad10;
  177         long    pad11;
  178         int     pad12;
  179         long    pad13;
  180         quad_t  pad14;
  181         long    pad15;
  182 
  183         struct  timeval pad16;
  184         /* we dont set this, because BSDI's uname used gethostname() instead */
  185         int     bsdi_hostname;          /* hostname on BSD/386 */
  186 
  187         /* the actual string data is appended here */
  188 
  189 } bsdi_si;
  190 
  191 /*
  192  * this data is appended to the end of the bsdi_si structure during copyout.
  193  * The "char *" offsets are relative to the base of the bsdi_si struct.
  194  * This contains "FreeBSD\02.0-BUILT-nnnnnn\0i386\0", and these strings
  195  * should not exceed the length of the buffer here... (or else!! :-)
  196  */
  197 static char bsdi_strings[80];   /* It had better be less than this! */
  198 
  199 #ifndef _SYS_SYSPROTO_H_
  200 struct getkerninfo_args {
  201         int     op;
  202         char    *where;
  203         size_t  *size;
  204         int     arg;
  205 };
  206 #endif
  207 int
  208 ogetkerninfo(struct thread *td, struct getkerninfo_args *uap)
  209 {
  210         int error, name[6];
  211         size_t size;
  212         u_int needed = 0;
  213 
  214         switch (uap->op & 0xff00) {
  215 
  216         case KINFO_RT:
  217                 name[0] = CTL_NET;
  218                 name[1] = PF_ROUTE;
  219                 name[2] = 0;
  220                 name[3] = (uap->op & 0xff0000) >> 16;
  221                 name[4] = uap->op & 0xff;
  222                 name[5] = uap->arg;
  223                 error = userland_sysctl(td, name, 6, uap->where, uap->size,
  224                         0, 0, 0, &size, 0);
  225                 break;
  226 
  227         case KINFO_VNODE:
  228                 name[0] = CTL_KERN;
  229                 name[1] = KERN_VNODE;
  230                 error = userland_sysctl(td, name, 2, uap->where, uap->size,
  231                         0, 0, 0, &size, 0);
  232                 break;
  233 
  234         case KINFO_PROC:
  235                 name[0] = CTL_KERN;
  236                 name[1] = KERN_PROC;
  237                 name[2] = uap->op & 0xff;
  238                 name[3] = uap->arg;
  239                 error = userland_sysctl(td, name, 4, uap->where, uap->size,
  240                         0, 0, 0, &size, 0);
  241                 break;
  242 
  243         case KINFO_FILE:
  244                 name[0] = CTL_KERN;
  245                 name[1] = KERN_FILE;
  246                 error = userland_sysctl(td, name, 2, uap->where, uap->size,
  247                         0, 0, 0, &size, 0);
  248                 break;
  249 
  250         case KINFO_METER:
  251                 name[0] = CTL_VM;
  252                 name[1] = VM_TOTAL;
  253                 error = userland_sysctl(td, name, 2, uap->where, uap->size,
  254                         0, 0, 0, &size, 0);
  255                 break;
  256 
  257         case KINFO_LOADAVG:
  258                 name[0] = CTL_VM;
  259                 name[1] = VM_LOADAVG;
  260                 error = userland_sysctl(td, name, 2, uap->where, uap->size,
  261                         0, 0, 0, &size, 0);
  262                 break;
  263 
  264         case KINFO_CLOCKRATE:
  265                 name[0] = CTL_KERN;
  266                 name[1] = KERN_CLOCKRATE;
  267                 error = userland_sysctl(td, name, 2, uap->where, uap->size,
  268                         0, 0, 0, &size, 0);
  269                 break;
  270 
  271         case KINFO_BSDI_SYSINFO: {
  272                 /*
  273                  * this is pretty crude, but it's just enough for uname()
  274                  * from BSDI's 1.x libc to work.
  275                  *
  276                  * *size gives the size of the buffer before the call, and
  277                  * the amount of data copied after a successful call.
  278                  * If successful, the return value is the amount of data
  279                  * available, which can be larger than *size.
  280                  *
  281                  * BSDI's 2.x product apparently fails with ENOMEM if *size
  282                  * is too small.
  283                  */
  284 
  285                 u_int left;
  286                 char *s;
  287 
  288                 bzero((char *)&bsdi_si, sizeof(bsdi_si));
  289                 bzero(bsdi_strings, sizeof(bsdi_strings));
  290 
  291                 s = bsdi_strings;
  292 
  293                 bsdi_si.bsdi_ostype = (s - bsdi_strings) + sizeof(bsdi_si);
  294                 strcpy(s, ostype);
  295                 s += strlen(s) + 1;
  296 
  297                 bsdi_si.bsdi_osrelease = (s - bsdi_strings) + sizeof(bsdi_si);
  298                 strcpy(s, osrelease);
  299                 s += strlen(s) + 1;
  300 
  301                 bsdi_si.bsdi_machine = (s - bsdi_strings) + sizeof(bsdi_si);
  302                 strcpy(s, machine);
  303                 s += strlen(s) + 1;
  304 
  305                 needed = sizeof(bsdi_si) + (s - bsdi_strings);
  306 
  307                 if ((uap->where == NULL) || (uap->size == NULL)) {
  308                         /* process is asking how much buffer to supply.. */
  309                         size = needed;
  310                         error = 0;
  311                         break;
  312                 }
  313 
  314                 if ((error = copyin(uap->size, &size, sizeof(size))) != 0)
  315                         break;
  316 
  317                 /* if too much buffer supplied, trim it down */
  318                 if (size > needed)
  319                         size = needed;
  320 
  321                 /* how much of the buffer is remaining */
  322                 left = size;
  323 
  324                 if ((error = copyout((char *)&bsdi_si, uap->where, left)) != 0)
  325                         break;
  326 
  327                 /* is there any point in continuing? */
  328                 if (left > sizeof(bsdi_si)) {
  329                         left -= sizeof(bsdi_si);
  330                         error = copyout(&bsdi_strings,
  331                                         uap->where + sizeof(bsdi_si), left);
  332                 }
  333                 break;
  334         }
  335 
  336         default:
  337                 error = EOPNOTSUPP;
  338                 break;
  339         }
  340         if (error == 0) {
  341                 td->td_retval[0] = needed ? needed : size;
  342                 if (uap->size) {
  343                         error = copyout(&size, uap->size, sizeof(size));
  344                 }
  345         }
  346         return (error);
  347 }
  348 #endif /* COMPAT_43 */
  349 
  350 /*
  351  * This is the FreeBSD-1.1 compatable uname(2) interface.  These days it is
  352  * done in libc as a wrapper around a bunch of sysctl's.  This must maintain
  353  * the old 1.1 binary ABI.
  354  */
  355 #if SYS_NMLN != 32
  356 #error "FreeBSD-1.1 uname syscall has been broken"
  357 #endif
  358 #ifndef _SYS_SYSPROTO_H_
  359 struct uname_args {
  360         struct utsname  *name;
  361 };
  362 #endif
  363 /* ARGSUSED */
  364 int
  365 uname(td, uap)
  366         struct thread *td;
  367         struct uname_args *uap;
  368 {
  369         int name[2], error;
  370         size_t len;
  371         char *s, *us;
  372 
  373         name[0] = CTL_KERN;
  374         name[1] = KERN_OSTYPE;
  375         len = sizeof (uap->name->sysname);
  376         error = userland_sysctl(td, name, 2, uap->name->sysname, &len, 
  377                 1, 0, 0, 0, 0);
  378         if (error)
  379                 return (error);
  380         subyte( uap->name->sysname + sizeof(uap->name->sysname) - 1, 0);
  381 
  382         name[1] = KERN_HOSTNAME;
  383         len = sizeof uap->name->nodename;
  384         error = userland_sysctl(td, name, 2, uap->name->nodename, &len, 
  385                 1, 0, 0, 0, 0);
  386         if (error)
  387                 return (error);
  388         subyte( uap->name->nodename + sizeof(uap->name->nodename) - 1, 0);
  389 
  390         name[1] = KERN_OSRELEASE;
  391         len = sizeof uap->name->release;
  392         error = userland_sysctl(td, name, 2, uap->name->release, &len, 
  393                 1, 0, 0, 0, 0);
  394         if (error)
  395                 return (error);
  396         subyte( uap->name->release + sizeof(uap->name->release) - 1, 0);
  397 
  398 /*
  399         name = KERN_VERSION;
  400         len = sizeof uap->name->version;
  401         error = userland_sysctl(td, name, 2, uap->name->version, &len, 
  402                 1, 0, 0, 0, 0);
  403         if (error)
  404                 return (error);
  405         subyte( uap->name->version + sizeof(uap->name->version) - 1, 0);
  406 */
  407 
  408 /*
  409  * this stupid hackery to make the version field look like FreeBSD 1.1
  410  */
  411         for(s = version; *s && *s != '#'; s++);
  412 
  413         for(us = uap->name->version; *s && *s != ':'; s++) {
  414                 error = subyte( us++, *s);
  415                 if (error)
  416                         return (error);
  417         }
  418         error = subyte( us++, 0);
  419         if (error)
  420                 return (error);
  421 
  422         name[0] = CTL_HW;
  423         name[1] = HW_MACHINE;
  424         len = sizeof uap->name->machine;
  425         error = userland_sysctl(td, name, 2, uap->name->machine, &len, 
  426                 1, 0, 0, 0, 0);
  427         if (error)
  428                 return (error);
  429         subyte( uap->name->machine + sizeof(uap->name->machine) - 1, 0);
  430         return (0);
  431 }
  432 
  433 #ifndef _SYS_SYSPROTO_H_
  434 struct getdomainname_args {
  435         char    *domainname;
  436         int     len;
  437 };
  438 #endif
  439 /* ARGSUSED */
  440 int
  441 getdomainname(td, uap)
  442         struct thread *td;
  443         struct getdomainname_args *uap;
  444 {
  445         int domainnamelen;
  446         int error;
  447 
  448         mtx_lock(&Giant);
  449         domainnamelen = strlen(domainname) + 1;
  450         if ((u_int)uap->len > domainnamelen)
  451                 uap->len = domainnamelen;
  452         error = copyout(domainname, uap->domainname, uap->len);
  453         mtx_unlock(&Giant);
  454         return (error);
  455 }
  456 
  457 #ifndef _SYS_SYSPROTO_H_
  458 struct setdomainname_args {
  459         char    *domainname;
  460         int     len;
  461 };
  462 #endif
  463 /* ARGSUSED */
  464 int
  465 setdomainname(td, uap)
  466         struct thread *td;
  467         struct setdomainname_args *uap;
  468 {
  469         int error, domainnamelen;
  470 
  471         error = priv_check(td, PRIV_SETDOMAINNAME);
  472         if (error)
  473                 return (error);
  474         mtx_lock(&Giant);
  475         if ((u_int)uap->len > sizeof (domainname) - 1) {
  476                 error = EINVAL;
  477                 goto done2;
  478         }
  479         domainnamelen = uap->len;
  480         error = copyin(uap->domainname, domainname, uap->len);
  481         domainname[domainnamelen] = 0;
  482 done2:
  483         mtx_unlock(&Giant);
  484         return (error);
  485 }

Cache object: 789358c6d8e53c4f5b55c48014d0e374


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]


This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.