usr/src/lib/libproc/common/pr_waitid.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21
  22 /*
  23  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 #pragma ident   "%Z%%M% %I%     %E% SMI"
  28
  29 #include <sys/isa_defs.h>
  30
  31 #include <stdlib.h>
  32 #include <unistd.h>
  33 #include <string.h>
  34 #include <errno.h>
  35 #include <sys/types.h>
  36 #include <sys/wait.h>
  37
  38 #include "P32ton.h"
  39 #include "libproc.h"
  40
  41 /*
  42  * waitid() system call -- executed by subject process
  43  */
  44 int
  45 pr_waitid(struct ps_prochandle *Pr,
  46     idtype_t idtype, id_t id, siginfo_t *infop, int options)
  47 {
  48         sysret_t rval;                  /* return value from waitid() */
  49         argdes_t argd[4];               /* arg descriptors for waitid() */
  50         argdes_t *adp;
  51         int error;
  52 #ifdef _LP64
  53         siginfo32_t siginfo32;
  54 #endif  /* _LP64 */
  55
  56         if (Pr == NULL)         /* no subject process */
  57                 return (waitid(idtype, id, infop, options));
  58
  59         adp = &argd[0];         /* idtype argument */
  60         adp->arg_value = idtype;
  61         adp->arg_object = NULL;
  62         adp->arg_type = AT_BYVAL;
  63         adp->arg_inout = AI_INPUT;
  64         adp->arg_size = 0;
  65
  66         adp++;                  /* id argument */
  67         adp->arg_value = id;
  68         adp->arg_object = NULL;
  69         adp->arg_type = AT_BYVAL;
  70         adp->arg_inout = AI_INPUT;
  71         adp->arg_size = 0;
  72
  73         adp++;                  /* infop argument */
  74         adp->arg_value = 0;
  75         adp->arg_type = AT_BYREF;
  76         adp->arg_inout = AI_OUTPUT;
  77 #ifdef _LP64
  78         if (Pstatus(Pr)->pr_dmodel == PR_MODEL_ILP32) {
  79                 adp->arg_object = &siginfo32;
  80                 adp->arg_size = sizeof (siginfo32);
  81         } else {
  82                 adp->arg_object = infop;
  83                 adp->arg_size = sizeof (*infop);
  84         }
  85 #else   /* _LP64 */
  86         adp->arg_object = infop;
  87         adp->arg_size = sizeof (*infop);
  88 #endif  /* _LP64 */
  89
  90         adp++;                  /* options argument */
  91         adp->arg_value = options;
  92         adp->arg_object = NULL;
  93         adp->arg_type = AT_BYVAL;
  94         adp->arg_inout = AI_INPUT;
  95         adp->arg_size = 0;
  96
  97         error = Psyscall(Pr, &rval, SYS_waitid, 4, &argd[0]);
  98
  99         if (error) {
 100                 errno = (error > 0)? error : ENOSYS;
 101                 return (-1);
 102         }
 103 #ifdef _LP64
 104         if (Pstatus(Pr)->pr_dmodel == PR_MODEL_ILP32)
 105                 siginfo_32_to_n(&siginfo32, infop);
 106 #endif  /* _LP64 */
 107         return (0);
 108 }