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      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 (c) 1997-2000 by Sun Microsystems, Inc.
     24  * All rights reserved.
     25  */
     26 
     27 #pragma ident	"%Z%%M%	%I%	%E% SMI"
     28 
     29 #include <stdlib.h>
     30 #include <unistd.h>
     31 #include <errno.h>
     32 #include <sys/types.h>
     33 #include "libproc.h"
     34 
     35 /*
     36  * ioctl() system call -- executed by subject process.
     37  */
     38 int
     39 pr_ioctl(struct ps_prochandle *Pr, int fd, int code, void *buf, size_t size)
     40 {
     41 	sysret_t rval;			/* return value from ioctl() */
     42 	argdes_t argd[3];		/* arg descriptors for ioctl() */
     43 	argdes_t *adp = &argd[0];	/* first argument */
     44 	int error;
     45 
     46 	if (Pr == NULL)		/* no subject process */
     47 		return (ioctl(fd, code, buf));
     48 
     49 	adp->arg_value = fd;
     50 	adp->arg_object = NULL;
     51 	adp->arg_type = AT_BYVAL;
     52 	adp->arg_inout = AI_INPUT;
     53 	adp->arg_size = 0;
     54 	adp++;			/* move to code argument */
     55 
     56 	adp->arg_value = code;
     57 	adp->arg_object = NULL;
     58 	adp->arg_type = AT_BYVAL;
     59 	adp->arg_inout = AI_INPUT;
     60 	adp->arg_size = 0;
     61 	adp++;			/* move to buffer argument */
     62 
     63 	if (size == 0) {
     64 		adp->arg_value = (long)buf;
     65 		adp->arg_object = NULL;
     66 		adp->arg_type = AT_BYVAL;
     67 		adp->arg_inout = AI_INPUT;
     68 		adp->arg_size = 0;
     69 	} else {
     70 		adp->arg_value = 0;
     71 		adp->arg_object = buf;
     72 		adp->arg_type = AT_BYREF;
     73 		adp->arg_inout = AI_INOUT;
     74 		adp->arg_size = size;
     75 	}
     76 
     77 	error = Psyscall(Pr, &rval, SYS_ioctl, 3, &argd[0]);
     78 
     79 	if (error) {
     80 		errno = (error > 0)? error : ENOSYS;
     81 		return (-1);
     82 	}
     83 	return (rval.sys_rval1);
     84 }
     85