/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright (c) 1997-2000 by Sun Microsystems, Inc.
 * All rights reserved.
 */

#include <sys/isa_defs.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <fcntl.h>
#include "libproc.h"

/*
 * fcntl() system call -- executed by subject process.
 */
int
pr_fcntl(struct ps_prochandle *Pr, int fd, int cmd, void *argp, void *argp1)
{
        sysret_t rval;                  /* return value from fcntl() */
        argdes_t argd[4];               /* arg descriptors for fcntl() */
        argdes_t *adp;
        int error;

        if (Pr == NULL)         /* no subject process */
                return (fcntl(fd, cmd, argp));

        adp = &argd[0];         /* file descriptor argument */
        adp->arg_value = fd;
        adp->arg_object = NULL;
        adp->arg_type = AT_BYVAL;
        adp->arg_inout = AI_INPUT;
        adp->arg_size = 0;

        adp++;                  /* cmd argument */
#ifdef _LP64
        if (Pstatus(Pr)->pr_dmodel == PR_MODEL_ILP32) {
                /*
                 * Guilty knowledge of the large file compilation environment
                 */
                switch (cmd) {
                case F_GETLK:
                        cmd = 33;
                        break;
                case F_SETLK:
                        cmd = 34;
                        break;
                case F_SETLKW:
                        cmd = 35;
                        break;
                case F_FREESP:
                        cmd = 27;
                        break;
                }
        }
#endif  /* _LP64 */
        adp->arg_value = cmd;
        adp->arg_object = NULL;
        adp->arg_type = AT_BYVAL;
        adp->arg_inout = AI_INPUT;
        adp->arg_size = 0;

        adp++;                  /* argp argument */
        if (argp == NULL) {
                adp->arg_value = 0;
                adp->arg_object = NULL;
                adp->arg_type = AT_BYVAL;
                adp->arg_inout = AI_INPUT;
                adp->arg_size = 0;
        } else {
                adp->arg_value = 0;
                adp->arg_object = argp;
                adp->arg_type = AT_BYREF;
                adp->arg_inout = AI_INOUT;
                switch (cmd) {
                case F_GETLK:
                case F_SETLK:
                case F_SETLKW:
                case F_ALLOCSP:
                case F_FREESP:
                        adp->arg_size = sizeof (struct flock);
                        break;
#ifdef _LP64
                case 33:
                case 34:
                case 35:
                case 27:
                        adp->arg_size = sizeof (struct flock64_32);
#else   /* _LP64 */
                case F_GETLK64:
                case F_SETLK64:
                case F_SETLKW64:
                case F_FREESP64:
                        adp->arg_size = sizeof (struct flock64);
#endif  /* _LP64 */
                        break;
                case F_SHARE:
                case F_UNSHARE:
                        adp->arg_size = sizeof (struct fshare);
                        break;
                default:
                        adp->arg_value = (long)argp;
                        adp->arg_object = NULL;
                        adp->arg_type = AT_BYVAL;
                        adp->arg_inout = AI_INPUT;
                        adp->arg_size = 0;
                        break;
                }
        }

        adp++;                  /* argp1 argument */
        adp->arg_value = (intptr_t)argp1;
        adp->arg_object = NULL;
        adp->arg_type = AT_BYVAL;
        adp->arg_inout = AI_INPUT;
        adp->arg_size = 0;

        error = Psyscall(Pr, &rval, SYS_fcntl, 4, &argd[0]);

        if (error) {
                errno = (error > 0)? error : ENOSYS;
                return (-1);
        }
        return (rval.sys_rval1);
}