The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/svr4/svr4_ipc.c

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    1 /*
    2  * $FreeBSD: src/sys/svr4/svr4_ipc.c,v 1.5 1999/12/08 10:51:16 newton Exp $
    3  *      Derived from:
    4  *      $NetBSD: svr4_ipc.c,v 1.7 1998/10/19 22:43:00 tron Exp $        */
    5 
    6 /*-
    7  * Original copyright:
    8  *
    9  * Copyright (c) 1995 The NetBSD Foundation, Inc.
   10  * All rights reserved.
   11  *
   12  * This code is derived from software contributed to The NetBSD Foundation
   13  * by Christos Zoulas.
   14  *
   15  * Redistribution and use in source and binary forms, with or without
   16  * modification, are permitted provided that the following conditions
   17  * are met:
   18  * 1. Redistributions of source code must retain the above copyright
   19  *    notice, this list of conditions and the following disclaimer.
   20  * 2. Redistributions in binary form must reproduce the above copyright
   21  *    notice, this list of conditions and the following disclaimer in the
   22  *    documentation and/or other materials provided with the distribution.
   23  * 3. All advertising materials mentioning features or use of this software
   24  *    must display the following acknowledgement:
   25  *        This product includes software developed by the NetBSD
   26  *        Foundation, Inc. and its contributors.
   27  * 4. Neither the name of The NetBSD Foundation nor the names of its
   28  *    contributors may be used to endorse or promote products derived
   29  *    from this software without specific prior written permission.
   30  *
   31  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
   32  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   33  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   34  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
   35  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   36  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   37  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   38  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   39  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   40  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   41  * POSSIBILITY OF SUCH DAMAGE.
   42  */
   43 
   44 /*
   45  * Portions of this code have been derived from software contributed
   46  * to the FreeBSD Project by Mark Newton.
   47  *
   48  * Copyright (c) 1999 Mark Newton
   49  * All rights reserved.
   50  * 
   51  * Redistribution and use in source and binary forms, with or without
   52  * modification, are permitted provided that the following conditions
   53  * are met:
   54  * 1. Redistributions of source code must retain the above copyright
   55  *    notice, this list of conditions and the following disclaimer.
   56  * 2. Redistributions in binary form must reproduce the above copyright
   57  *    notice, this list of conditions and the following disclaimer in the
   58  *    documentation and/or other materials provided with the distribution.
   59  * 3. The name of the author may not be used to endorse or promote products
   60  *    derived from this software without specific prior written permission
   61  *
   62  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   63  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   64  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   65  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   66  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   67  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   68  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   69  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   70  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   71  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   72  *
   73  * XXX- This code is presently a no-op on FreeBSD (and isn't compiled due
   74  * to preprocessor conditionals).  A nice project for a kernel hacking 
   75  * novice might be to MakeItGo, but I have more important fish to fry
   76  * at present.
   77  *
   78  */
   79 
   80 #include <sys/types.h>
   81 #include <sys/param.h>
   82 #include <sys/kernel.h>
   83 #include <sys/proc.h>
   84 #include <sys/time.h>
   85 
   86 #include <svr4/svr4.h>
   87 #include <svr4/svr4_types.h>
   88 #include <svr4/svr4_signal.h>
   89 #include <svr4/svr4_proto.h>
   90 #include <svr4/svr4_util.h>
   91 #include <svr4/svr4_ipc.h>
   92 
   93 #if defined(SYSVMSG) || defined(SYSVSHM) || defined(SYSVSEM)
   94 static void svr4_to_bsd_ipc_perm __P((const struct svr4_ipc_perm *,
   95                                       struct ipc_perm *));
   96 static void bsd_to_svr4_ipc_perm __P((const struct ipc_perm *,
   97                                       struct svr4_ipc_perm *));
   98 #endif
   99 
  100 #ifdef SYSVSEM
  101 static void bsd_to_svr4_semid_ds __P((const struct semid_ds *,
  102                                       struct svr4_semid_ds *));
  103 static void svr4_to_bsd_semid_ds __P((const struct svr4_semid_ds *,
  104                                       struct semid_ds *));
  105 static int svr4_setsemun __P((caddr_t *sgp, union semun **argp,
  106                               union semun *usp));
  107 static int svr4_semop __P((struct proc *, void *, register_t *));
  108 static int svr4_semget __P((struct proc *, void *, register_t *));
  109 static int svr4_semctl __P((struct proc *, void *, register_t *));
  110 #endif
  111 
  112 #ifdef SYSVMSG
  113 static void bsd_to_svr4_msqid_ds __P((const struct msqid_ds *,
  114                                       struct svr4_msqid_ds *));
  115 static void svr4_to_bsd_msqid_ds __P((const struct svr4_msqid_ds *,
  116                                       struct msqid_ds *));
  117 static int svr4_msgsnd __P((struct proc *, void *, register_t *));
  118 static int svr4_msgrcv __P((struct proc *, void *, register_t *));
  119 static int svr4_msgget __P((struct proc *, void *, register_t *));
  120 static int svr4_msgctl __P((struct proc *, void *, register_t *));
  121 #endif
  122 
  123 #ifdef SYSVSHM
  124 static void bsd_to_svr4_shmid_ds __P((const struct shmid_ds *,
  125                                       struct svr4_shmid_ds *));
  126 static void svr4_to_bsd_shmid_ds __P((const struct svr4_shmid_ds *,
  127                                       struct shmid_ds *));
  128 static int svr4_shmat __P((struct proc *, void *, register_t *));
  129 static int svr4_shmdt __P((struct proc *, void *, register_t *));
  130 static int svr4_shmget __P((struct proc *, void *, register_t *));
  131 static int svr4_shmctl __P((struct proc *, void *, register_t *));
  132 #endif
  133 
  134 #if defined(SYSVMSG) || defined(SYSVSHM) || defined(SYSVSEM)
  135 
  136 static void
  137 svr4_to_bsd_ipc_perm(spp, bpp)
  138         const struct svr4_ipc_perm *spp;
  139         struct ipc_perm *bpp;
  140 {
  141         bpp->key = spp->key;
  142         bpp->uid = spp->uid;
  143         bpp->gid = spp->gid;
  144         bpp->cuid = spp->cuid;
  145         bpp->cgid = spp->cgid;
  146         bpp->mode = spp->mode;
  147         bpp->seq = spp->seq;
  148 }
  149 
  150 static void
  151 bsd_to_svr4_ipc_perm(bpp, spp)
  152         const struct ipc_perm *bpp;
  153         struct svr4_ipc_perm *spp;
  154 {
  155         spp->key = bpp->key;
  156         spp->uid = bpp->uid;
  157         spp->gid = bpp->gid;
  158         spp->cuid = bpp->cuid;
  159         spp->cgid = bpp->cgid;
  160         spp->mode = bpp->mode;
  161         spp->seq = bpp->seq;
  162 }
  163 #endif
  164 
  165 #ifdef SYSVSEM
  166 static void
  167 bsd_to_svr4_semid_ds(bds, sds)
  168         const struct semid_ds *bds;
  169         struct svr4_semid_ds *sds;
  170 {
  171         bsd_to_svr4_ipc_perm(&bds->sem_perm, &sds->sem_perm);
  172         sds->sem_base = (struct svr4_sem *) bds->sem_base;
  173         sds->sem_nsems = bds->sem_nsems;
  174         sds->sem_otime = bds->sem_otime;
  175         sds->sem_pad1 = bds->sem_pad1;
  176         sds->sem_ctime = bds->sem_ctime;
  177         sds->sem_pad2 = bds->sem_pad2;
  178 }
  179 
  180 static void
  181 svr4_to_bsd_semid_ds(sds, bds)
  182         const struct svr4_semid_ds *sds;
  183         struct semid_ds *bds;
  184 {
  185         svr4_to_bsd_ipc_perm(&sds->sem_perm, &bds->sem_perm);
  186         bds->sem_base = (struct sem *) bds->sem_base;
  187         bds->sem_nsems = sds->sem_nsems;
  188         bds->sem_otime = sds->sem_otime;
  189         bds->sem_pad1 = sds->sem_pad1;
  190         bds->sem_ctime = sds->sem_ctime;
  191         bds->sem_pad2 = sds->sem_pad2;
  192 }
  193 
  194 static int
  195 svr4_setsemun(sgp, argp, usp)
  196         caddr_t *sgp;
  197         union semun **argp;
  198         union semun *usp;
  199 {
  200         *argp = stackgap_alloc(sgp, sizeof(union semun));
  201         return copyout((caddr_t)usp, *argp, sizeof(union semun));
  202 }
  203 
  204 struct svr4_sys_semctl_args {
  205         syscallarg(int) what;
  206         syscallarg(int) semid;
  207         syscallarg(int) semnum;
  208         syscallarg(int) cmd;
  209         syscallarg(union semun) arg;
  210 };
  211 
  212 static int
  213 svr4_semctl(p, v, retval)
  214         struct proc *p;
  215         void *v;
  216         register_t *retval;
  217 {
  218         int error;
  219         struct svr4_sys_semctl_args *uap = v;
  220         struct sys___semctl_args ap;
  221         struct svr4_semid_ds ss;
  222         struct semid_ds bs, *bsp;
  223         caddr_t sg = stackgap_init(p->p_emul);
  224 
  225         SCARG(&ap, semid) = SCARG(uap, semid);
  226         SCARG(&ap, semnum) = SCARG(uap, semnum);
  227 
  228         switch (SCARG(uap, cmd)) {
  229         case SVR4_SEM_GETZCNT:
  230         case SVR4_SEM_GETNCNT:
  231         case SVR4_SEM_GETPID:
  232         case SVR4_SEM_GETVAL:
  233                 switch (SCARG(uap, cmd)) {
  234                 case SVR4_SEM_GETZCNT:
  235                         SCARG(&ap, cmd) = GETZCNT;
  236                         break;
  237                 case SVR4_SEM_GETNCNT:
  238                         SCARG(&ap, cmd) = GETNCNT;
  239                         break;
  240                 case SVR4_SEM_GETPID:
  241                         SCARG(&ap, cmd) = GETPID;
  242                         break;
  243                 case SVR4_SEM_GETVAL:
  244                         SCARG(&ap, cmd) = GETVAL;
  245                         break;
  246                 }
  247                 return sys___semctl(p, &ap, retval);
  248 
  249         case SVR4_SEM_SETVAL:
  250                 error = svr4_setsemun(&sg, &SCARG(&ap, arg), &SCARG(uap, arg));
  251                 if (error)
  252                         return error;
  253                 SCARG(&ap, cmd) = SETVAL;
  254                 return sys___semctl(p, &ap, retval);
  255 
  256         case SVR4_SEM_GETALL:
  257                 error = svr4_setsemun(&sg, &SCARG(&ap, arg), &SCARG(uap, arg));
  258                 if (error)
  259                         return error;
  260                 SCARG(&ap, cmd) = GETVAL;
  261                 return sys___semctl(p, &ap, retval);
  262 
  263         case SVR4_SEM_SETALL:
  264                 error = svr4_setsemun(&sg, &SCARG(&ap, arg), &SCARG(uap, arg));
  265                 if (error)
  266                         return error;
  267                 SCARG(&ap, cmd) = SETVAL;
  268                 return sys___semctl(p, &ap, retval);
  269 
  270         case SVR4_IPC_STAT:
  271                 SCARG(&ap, cmd) = IPC_STAT;
  272                 bsp = stackgap_alloc(&sg, sizeof(bs));
  273                 error = svr4_setsemun(&sg, &SCARG(&ap, arg),
  274                                       (union semun *)&bsp);
  275                 if (error)
  276                         return error;
  277                 if ((error = sys___semctl(p, &ap, retval)) != 0)
  278                         return error;
  279                 error = copyin((caddr_t)bsp, (caddr_t)&bs, sizeof(bs));
  280                 if (error)
  281                         return error;
  282                 bsd_to_svr4_semid_ds(&bs, &ss);
  283                 return copyout(&ss, SCARG(uap, arg).buf, sizeof(ss));
  284 
  285         case SVR4_IPC_SET:
  286                 SCARG(&ap, cmd) = IPC_SET;
  287                 bsp = stackgap_alloc(&sg, sizeof(bs));
  288                 error = svr4_setsemun(&sg, &SCARG(&ap, arg),
  289                                       (union semun *)&bsp);
  290                 if (error)
  291                         return error;
  292                 error = copyin(SCARG(uap, arg).buf, (caddr_t) &ss, sizeof ss);
  293                 if (error)
  294                         return error;
  295                 svr4_to_bsd_semid_ds(&ss, &bs);
  296                 error = copyout(&bs, bsp, sizeof(bs));
  297                 if (error)
  298                         return error;
  299                 return sys___semctl(p, &ap, retval);
  300 
  301         case SVR4_IPC_RMID:
  302                 SCARG(&ap, cmd) = IPC_RMID;
  303                 bsp = stackgap_alloc(&sg, sizeof(bs));
  304                 error = svr4_setsemun(&sg, &SCARG(&ap, arg),
  305                                       (union semun *)&bsp);
  306                 if (error)
  307                         return error;
  308                 error = copyin(SCARG(uap, arg).buf, &ss, sizeof ss);
  309                 if (error)
  310                         return error;
  311                 svr4_to_bsd_semid_ds(&ss, &bs);
  312                 error = copyout(&bs, bsp, sizeof(bs));
  313                 if (error)
  314                         return error;
  315                 return sys___semctl(p, &ap, retval);
  316 
  317         default:
  318                 return EINVAL;
  319         }
  320 }
  321 
  322 struct svr4_sys_semget_args {
  323         syscallarg(int) what;
  324         syscallarg(svr4_key_t) key;
  325         syscallarg(int) nsems;
  326         syscallarg(int) semflg;
  327 };
  328 
  329 static int
  330 svr4_semget(p, v, retval)
  331         struct proc *p;
  332         void *v;
  333         register_t *retval;
  334 {
  335         struct svr4_sys_semget_args *uap = v;
  336         struct sys_semget_args ap;
  337 
  338         SCARG(&ap, key) = SCARG(uap, key);
  339         SCARG(&ap, nsems) = SCARG(uap, nsems);
  340         SCARG(&ap, semflg) = SCARG(uap, semflg);
  341 
  342         return sys_semget(p, &ap, retval);
  343 }
  344 
  345 struct svr4_sys_semop_args {
  346         syscallarg(int) what;
  347         syscallarg(int) semid;
  348         syscallarg(struct svr4_sembuf *) sops;
  349         syscallarg(u_int) nsops;
  350 };
  351 
  352 static int
  353 svr4_semop(p, v, retval)
  354         struct proc *p;
  355         void *v;
  356         register_t *retval;
  357 {
  358         struct svr4_sys_semop_args *uap = v;
  359         struct sys_semop_args ap;
  360 
  361         SCARG(&ap, semid) = SCARG(uap, semid);
  362         /* These are the same */
  363         SCARG(&ap, sops) = (struct sembuf *) SCARG(uap, sops);
  364         SCARG(&ap, nsops) = SCARG(uap, nsops);
  365 
  366         return sys_semop(p, &ap, retval);
  367 }
  368 
  369 int
  370 svr4_sys_semsys(p, v, retval)
  371         struct proc *p;
  372         void *v;
  373         register_t *retval;
  374 {
  375         struct svr4_sys_semsys_args *uap = v;
  376 
  377         DPRINTF(("svr4_semsys(%d)\n", SCARG(uap, what)));
  378 
  379         switch (SCARG(uap, what)) {
  380         case SVR4_semctl:
  381                 return svr4_semctl(p, v, retval);
  382         case SVR4_semget:
  383                 return svr4_semget(p, v, retval);
  384         case SVR4_semop:
  385                 return svr4_semop(p, v, retval);
  386         default:
  387                 return EINVAL;
  388         }
  389 }
  390 #endif
  391 
  392 #ifdef SYSVMSG
  393 static void
  394 bsd_to_svr4_msqid_ds(bds, sds)
  395         const struct msqid_ds *bds;
  396         struct svr4_msqid_ds *sds;
  397 {
  398         bsd_to_svr4_ipc_perm(&bds->msg_perm, &sds->msg_perm);
  399         sds->msg_first = (struct svr4_msg *) bds->msg_first;
  400         sds->msg_last = (struct svr4_msg *) bds->msg_last;
  401         sds->msg_cbytes = bds->msg_cbytes;
  402         sds->msg_qnum = bds->msg_qnum;
  403         sds->msg_qbytes = bds->msg_qbytes;
  404         sds->msg_lspid = bds->msg_lspid;
  405         sds->msg_lrpid = bds->msg_lrpid;
  406         sds->msg_stime = bds->msg_stime;
  407         sds->msg_pad1 = bds->msg_pad1;
  408         sds->msg_rtime = bds->msg_rtime;
  409         sds->msg_pad2 = bds->msg_pad2;
  410         sds->msg_ctime = bds->msg_ctime;
  411         sds->msg_pad3 = bds->msg_pad3;
  412 
  413         /* use the padding for the rest of the fields */
  414         {
  415                 const short *pad = (const short *) bds->msg_pad4;
  416                 sds->msg_cv = pad[0];
  417                 sds->msg_qnum_cv = pad[1];
  418         }
  419 }
  420 
  421 static void
  422 svr4_to_bsd_msqid_ds(sds, bds)
  423         const struct svr4_msqid_ds *sds;
  424         struct msqid_ds *bds;
  425 {
  426         svr4_to_bsd_ipc_perm(&sds->msg_perm, &bds->msg_perm);
  427         bds->msg_first = (struct msg *) sds->msg_first;
  428         bds->msg_last = (struct msg *) sds->msg_last;
  429         bds->msg_cbytes = sds->msg_cbytes;
  430         bds->msg_qnum = sds->msg_qnum;
  431         bds->msg_qbytes = sds->msg_qbytes;
  432         bds->msg_lspid = sds->msg_lspid;
  433         bds->msg_lrpid = sds->msg_lrpid;
  434         bds->msg_stime = sds->msg_stime;
  435         bds->msg_pad1 = sds->msg_pad1;
  436         bds->msg_rtime = sds->msg_rtime;
  437         bds->msg_pad2 = sds->msg_pad2;
  438         bds->msg_ctime = sds->msg_ctime;
  439         bds->msg_pad3 = sds->msg_pad3;
  440 
  441         /* use the padding for the rest of the fields */
  442         {
  443                 short *pad = (short *) bds->msg_pad4;
  444                 pad[0] = sds->msg_cv;
  445                 pad[1] = sds->msg_qnum_cv;
  446         }
  447 }
  448 
  449 struct svr4_sys_msgsnd_args {
  450         syscallarg(int) what;
  451         syscallarg(int) msqid;
  452         syscallarg(void *) msgp;
  453         syscallarg(size_t) msgsz;
  454         syscallarg(int) msgflg;
  455 };
  456 
  457 static int
  458 svr4_msgsnd(p, v, retval)
  459         struct proc *p;
  460         void *v;
  461         register_t *retval;
  462 {
  463         struct svr4_sys_msgsnd_args *uap = v;
  464         struct sys_msgsnd_args ap;
  465 
  466         SCARG(&ap, msqid) = SCARG(uap, msqid);
  467         SCARG(&ap, msgp) = SCARG(uap, msgp);
  468         SCARG(&ap, msgsz) = SCARG(uap, msgsz);
  469         SCARG(&ap, msgflg) = SCARG(uap, msgflg);
  470 
  471         return sys_msgsnd(p, &ap, retval);
  472 }
  473 
  474 struct svr4_sys_msgrcv_args {
  475         syscallarg(int) what;
  476         syscallarg(int) msqid;
  477         syscallarg(void *) msgp;
  478         syscallarg(size_t) msgsz;
  479         syscallarg(long) msgtyp;
  480         syscallarg(int) msgflg;
  481 };
  482 
  483 static int
  484 svr4_msgrcv(p, v, retval)
  485         struct proc *p;
  486         void *v;
  487         register_t *retval;
  488 {
  489         struct svr4_sys_msgrcv_args *uap = v;
  490         struct sys_msgrcv_args ap;
  491 
  492         SCARG(&ap, msqid) = SCARG(uap, msqid);
  493         SCARG(&ap, msgp) = SCARG(uap, msgp);
  494         SCARG(&ap, msgsz) = SCARG(uap, msgsz);
  495         SCARG(&ap, msgtyp) = SCARG(uap, msgtyp);
  496         SCARG(&ap, msgflg) = SCARG(uap, msgflg);
  497 
  498         return sys_msgrcv(p, &ap, retval);
  499 }
  500         
  501 struct svr4_sys_msgget_args {
  502         syscallarg(int) what;
  503         syscallarg(svr4_key_t) key;
  504         syscallarg(int) msgflg;
  505 };
  506 
  507 static int
  508 svr4_msgget(p, v, retval)
  509         struct proc *p;
  510         void *v;
  511         register_t *retval;
  512 {
  513         struct svr4_sys_msgget_args *uap = v;
  514         struct sys_msgget_args ap;
  515 
  516         SCARG(&ap, key) = SCARG(uap, key);
  517         SCARG(&ap, msgflg) = SCARG(uap, msgflg);
  518 
  519         return sys_msgget(p, &ap, retval);
  520 }
  521 
  522 struct svr4_sys_msgctl_args {
  523         syscallarg(int) what;
  524         syscallarg(int) msqid;
  525         syscallarg(int) cmd;
  526         syscallarg(struct svr4_msqid_ds *) buf;
  527 };
  528 
  529 static int
  530 svr4_msgctl(p, v, retval)
  531         struct proc *p;
  532         void *v;
  533         register_t *retval;
  534 {
  535         int error;
  536         struct svr4_sys_msgctl_args *uap = v;
  537         struct sys_msgctl_args ap;
  538         struct svr4_msqid_ds ss;
  539         struct msqid_ds bs;
  540         caddr_t sg = stackgap_init(p->p_emul);
  541 
  542         SCARG(&ap, msqid) = SCARG(uap, msqid);
  543         SCARG(&ap, cmd) = SCARG(uap, cmd);
  544         SCARG(&ap, buf) = stackgap_alloc(&sg, sizeof(bs));
  545 
  546         switch (SCARG(uap, cmd)) {
  547         case SVR4_IPC_STAT:
  548                 SCARG(&ap, cmd) = IPC_STAT;
  549                 if ((error = sys_msgctl(p, &ap, retval)) != 0)
  550                         return error;
  551                 error = copyin(&bs, SCARG(&ap, buf), sizeof bs);
  552                 if (error)
  553                         return error;
  554                 bsd_to_svr4_msqid_ds(&bs, &ss);
  555                 return copyout(&ss, SCARG(uap, buf), sizeof ss);
  556 
  557         case SVR4_IPC_SET:
  558                 SCARG(&ap, cmd) = IPC_SET;
  559                 error = copyin(SCARG(uap, buf), &ss, sizeof ss);
  560                 if (error)
  561                         return error;
  562                 svr4_to_bsd_msqid_ds(&ss, &bs);
  563                 error = copyout(&bs, SCARG(&ap, buf), sizeof bs);
  564                 if (error)
  565                         return error;
  566                 return sys_msgctl(p, &ap, retval);
  567 
  568         case SVR4_IPC_RMID:
  569                 SCARG(&ap, cmd) = IPC_RMID;
  570                 error = copyin(SCARG(uap, buf), &ss, sizeof ss);
  571                 if (error)
  572                         return error;
  573                 svr4_to_bsd_msqid_ds(&ss, &bs);
  574                 error = copyout(&bs, SCARG(&ap, buf), sizeof bs);
  575                 if (error)
  576                         return error;
  577                 return sys_msgctl(p, &ap, retval);
  578 
  579         default:
  580                 return EINVAL;
  581         }
  582 }
  583 
  584 int
  585 svr4_sys_msgsys(p, v, retval)
  586         struct proc *p;
  587         void *v;
  588         register_t *retval;
  589 {
  590         struct svr4_sys_msgsys_args *uap = v;
  591 
  592         DPRINTF(("svr4_msgsys(%d)\n", SCARG(uap, what)));
  593 
  594         switch (SCARG(uap, what)) {
  595         case SVR4_msgsnd:
  596                 return svr4_msgsnd(p, v, retval);
  597         case SVR4_msgrcv:
  598                 return svr4_msgrcv(p, v, retval);
  599         case SVR4_msgget:
  600                 return svr4_msgget(p, v, retval);
  601         case SVR4_msgctl:
  602                 return svr4_msgctl(p, v, retval);
  603         default:
  604                 return EINVAL;
  605         }
  606 }
  607 #endif
  608 
  609 #ifdef SYSVSHM
  610 
  611 static void
  612 bsd_to_svr4_shmid_ds(bds, sds)
  613         const struct shmid_ds *bds;
  614         struct svr4_shmid_ds *sds;
  615 {
  616         bsd_to_svr4_ipc_perm(&bds->shm_perm, &sds->shm_perm);
  617         sds->shm_segsz = bds->shm_segsz;
  618         sds->shm_lkcnt = 0;
  619         sds->shm_lpid = bds->shm_lpid;
  620         sds->shm_cpid = bds->shm_cpid;
  621         sds->shm_amp = bds->shm_internal;
  622         sds->shm_nattch = bds->shm_nattch;
  623         sds->shm_cnattch = 0;
  624         sds->shm_atime = bds->shm_atime;
  625         sds->shm_pad1 = 0;
  626         sds->shm_dtime = bds->shm_dtime;
  627         sds->shm_pad2 = 0;
  628         sds->shm_ctime = bds->shm_ctime;
  629         sds->shm_pad3 = 0;
  630 }
  631 
  632 static void
  633 svr4_to_bsd_shmid_ds(sds, bds)
  634         const struct svr4_shmid_ds *sds;
  635         struct shmid_ds *bds;
  636 {
  637         svr4_to_bsd_ipc_perm(&sds->shm_perm, &bds->shm_perm);
  638         bds->shm_segsz = sds->shm_segsz;
  639         bds->shm_lpid = sds->shm_lpid;
  640         bds->shm_cpid = sds->shm_cpid;
  641         bds->shm_internal = sds->shm_amp;
  642         bds->shm_nattch = sds->shm_nattch;
  643         bds->shm_atime = sds->shm_atime;
  644         bds->shm_dtime = sds->shm_dtime;
  645         bds->shm_ctime = sds->shm_ctime;
  646 }
  647 
  648 struct svr4_sys_shmat_args {
  649         syscallarg(int) what;
  650         syscallarg(int) shmid;
  651         syscallarg(void *) shmaddr;
  652         syscallarg(int) shmflg;
  653 };
  654 
  655 static int
  656 svr4_shmat(p, v, retval)
  657         struct proc *p;
  658         void *v;
  659         register_t *retval;
  660 {
  661         struct svr4_sys_shmat_args *uap = v;
  662         struct sys_shmat_args ap;
  663 
  664         SCARG(&ap, shmid) = SCARG(uap, shmid);
  665         SCARG(&ap, shmaddr) = SCARG(uap, shmaddr);
  666         SCARG(&ap, shmflg) = SCARG(uap, shmflg);
  667 
  668         return sys_shmat(p, &ap, retval);
  669 }
  670 
  671 struct svr4_sys_shmdt_args {
  672         syscallarg(int) what;
  673         syscallarg(void *) shmaddr;
  674 };
  675 
  676 static int
  677 svr4_shmdt(p, v, retval)
  678         struct proc *p;
  679         void *v;
  680         register_t *retval;
  681 {
  682         struct svr4_sys_shmdt_args *uap = v;
  683         struct sys_shmdt_args ap;
  684 
  685         SCARG(&ap, shmaddr) = SCARG(uap, shmaddr);
  686 
  687         return sys_shmdt(p, &ap, retval);
  688 }
  689 
  690 struct svr4_sys_shmget_args {
  691         syscallarg(int) what;
  692         syscallarg(key_t) key;
  693         syscallarg(int) size;
  694         syscallarg(int) shmflg;
  695 };
  696 
  697 static int
  698 svr4_shmget(p, v, retval)
  699         struct proc *p;
  700         void *v;
  701         register_t *retval;
  702 {
  703         struct svr4_sys_shmget_args *uap = v;
  704         struct sys_shmget_args ap;
  705 
  706         SCARG(&ap, key) = SCARG(uap, key);
  707         SCARG(&ap, size) = SCARG(uap, size);
  708         SCARG(&ap, shmflg) = SCARG(uap, shmflg);
  709 
  710         return sys_shmget(p, &ap, retval);
  711 }
  712 
  713 struct svr4_sys_shmctl_args {
  714         syscallarg(int) what;
  715         syscallarg(int) shmid;
  716         syscallarg(int) cmd;
  717         syscallarg(struct svr4_shmid_ds *) buf;
  718 };
  719 
  720 int
  721 svr4_shmctl(p, v, retval)
  722         struct proc *p;
  723         void *v;
  724         register_t *retval;
  725 {
  726         struct svr4_sys_shmctl_args *uap = v;
  727         int error;
  728         caddr_t sg = stackgap_init(p->p_emul);
  729         struct sys_shmctl_args ap;
  730         struct shmid_ds bs;
  731         struct svr4_shmid_ds ss;
  732 
  733         SCARG(&ap, shmid) = SCARG(uap, shmid);
  734 
  735         if (SCARG(uap, buf) != NULL) {
  736                 SCARG(&ap, buf) = stackgap_alloc(&sg, sizeof (struct shmid_ds));
  737                 switch (SCARG(uap, cmd)) {
  738                 case SVR4_IPC_SET:
  739                 case SVR4_IPC_RMID:
  740                 case SVR4_SHM_LOCK:
  741                 case SVR4_SHM_UNLOCK:
  742                         error = copyin(SCARG(uap, buf), (caddr_t) &ss,
  743                             sizeof ss);
  744                         if (error)
  745                                 return error;
  746                         svr4_to_bsd_shmid_ds(&ss, &bs);
  747                         error = copyout(&bs, SCARG(&ap, buf), sizeof bs);
  748                         if (error)
  749                                 return error;
  750                         break;
  751                 default:
  752                         break;
  753                 }
  754         }
  755         else
  756                 SCARG(&ap, buf) = NULL;
  757 
  758 
  759         switch (SCARG(uap, cmd)) {
  760         case SVR4_IPC_STAT:
  761                 SCARG(&ap, cmd) = IPC_STAT;
  762                 if ((error = sys_shmctl(p, &ap, retval)) != 0)
  763                         return error;
  764                 if (SCARG(uap, buf) == NULL)
  765                         return 0;
  766                 error = copyin(&bs, SCARG(&ap, buf), sizeof bs);
  767                 if (error)
  768                         return error;
  769                 bsd_to_svr4_shmid_ds(&bs, &ss);
  770                 return copyout(&ss, SCARG(uap, buf), sizeof ss);
  771 
  772         case SVR4_IPC_SET:
  773                 SCARG(&ap, cmd) = IPC_SET;
  774                 return sys_shmctl(p, &ap, retval);
  775 
  776         case SVR4_IPC_RMID:
  777         case SVR4_SHM_LOCK:
  778         case SVR4_SHM_UNLOCK:
  779                 switch (SCARG(uap, cmd)) {
  780                 case SVR4_IPC_RMID:
  781                         SCARG(&ap, cmd) = IPC_RMID;
  782                         break;
  783                 case SVR4_SHM_LOCK:
  784                         SCARG(&ap, cmd) = SHM_LOCK;
  785                         break;
  786                 case SVR4_SHM_UNLOCK:
  787                         SCARG(&ap, cmd) = SHM_UNLOCK;
  788                         break;
  789                 default:
  790                         return EINVAL;
  791                 }
  792                 return sys_shmctl(p, &ap, retval);
  793 
  794         default:
  795                 return EINVAL;
  796         }
  797 }
  798 
  799 int
  800 svr4_sys_shmsys(p, v, retval)
  801         struct proc *p;
  802         void *v;
  803         register_t *retval;
  804 {
  805         struct svr4_sys_shmsys_args *uap = v;
  806 
  807         DPRINTF(("svr4_shmsys(%d)\n", SCARG(uap, what)));
  808 
  809         switch (SCARG(uap, what)) {
  810         case SVR4_shmat:
  811                 return svr4_shmat(p, v, retval);
  812         case SVR4_shmdt:
  813                 return svr4_shmdt(p, v, retval);
  814         case SVR4_shmget:
  815                 return svr4_shmget(p, v, retval);
  816         case SVR4_shmctl:
  817                 return svr4_shmctl(p, v, retval);
  818         default:
  819                 return ENOSYS;
  820         }
  821 }
  822 #endif /* SYSVSHM */

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