usr/src/lib/libproc/common/pr_sigaction.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, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*
  23  * Copyright 1997-2003 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 <signal.h>
  34 #include <memory.h>
  35 #include <errno.h>
  36
  37 #include "P32ton.h"
  38 #include "libproc.h"
  39
  40 /*
  41  * sigaction() system call -- executed by subject process.
  42  */
  43 int
  44 pr_sigaction(struct ps_prochandle *Pr,
  45         int sig, const struct sigaction *act, struct sigaction *oact)
  46 {
  47         sysret_t rval;                  /* return value from sigaction() */
  48         argdes_t argd[3];               /* arg descriptors for sigaction() */
  49         argdes_t *adp;
  50         int error;
  51 #ifdef _LP64
  52         struct sigaction32 act32;
  53         struct sigaction32 oact32;
  54 #endif  /* _LP64 */
  55
  56         if (Pr == NULL)         /* no subject process */
  57                 return (sigaction(sig, act, oact));
  58
  59         adp = &argd[0];         /* sig argument */
  60         adp->arg_value = sig;
  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++;                  /* act argument */
  67         adp->arg_value = 0;
  68         if (act == NULL) {
  69                 adp->arg_type = AT_BYVAL;
  70                 adp->arg_inout = AI_INPUT;
  71                 adp->arg_object = NULL;
  72                 adp->arg_size = 0;
  73         } else {
  74                 adp->arg_type = AT_BYREF;
  75                 adp->arg_inout = AI_INPUT;
  76 #ifdef _LP64
  77                 if (Pstatus(Pr)->pr_dmodel == PR_MODEL_ILP32) {
  78                         sigaction_n_to_32(act, &act32);
  79                         adp->arg_object = &act32;
  80                         adp->arg_size = sizeof (act32);
  81                 } else {
  82                         adp->arg_object = (void *)act;
  83                         adp->arg_size = sizeof (*act);
  84                 }
  85 #else   /* _LP64 */
  86                 adp->arg_object = (void *)act;
  87                 adp->arg_size = sizeof (*act);
  88 #endif  /* _LP64 */
  89         }
  90
  91         adp++;                  /* oact argument */
  92         adp->arg_value = 0;
  93         if (oact == NULL) {
  94                 adp->arg_type = AT_BYVAL;
  95                 adp->arg_inout = AI_INPUT;
  96                 adp->arg_object = NULL;
  97                 adp->arg_size = 0;
  98         } else {
  99                 adp->arg_type = AT_BYREF;
 100                 adp->arg_inout = AI_OUTPUT;
 101 #ifdef _LP64
 102                 if (Pstatus(Pr)->pr_dmodel == PR_MODEL_ILP32) {
 103                         adp->arg_object = &oact32;
 104                         adp->arg_size = sizeof (oact32);
 105                 } else {
 106                         adp->arg_object = oact;
 107                         adp->arg_size = sizeof (*oact);
 108                 }
 109 #else   /* _LP64 */
 110                 adp->arg_object = oact;
 111                 adp->arg_size = sizeof (*oact);
 112 #endif  /* _LP64 */
 113         }
 114
 115         error = Psyscall(Pr, &rval, SYS_sigaction, 3, &argd[0]);
 116
 117         if (error) {
 118                 errno = (error > 0)? error : ENOSYS;
 119                 return (-1);
 120         }
 121 #ifdef _LP64
 122         if (oact != NULL && Pstatus(Pr)->pr_dmodel == PR_MODEL_ILP32)
 123                 sigaction_32_to_n(&oact32, oact);
 124 #endif  /* _LP64 */
 125         return (rval.sys_rval1);
 126 }