usr/src/lib/libproc/common/pr_fcntl.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 (c) 1997-2000 by Sun Microsystems, Inc.
  24  * All rights reserved.
  25  */
  26
  27 #pragma ident   "%Z%%M% %I%     %E% SMI"
  28
  29 #include <sys/isa_defs.h>
  30 #include <stdlib.h>
  31 #include <unistd.h>
  32 #include <errno.h>
  33 #include <fcntl.h>
  34 #include "libproc.h"
  35
  36 /*
  37  * fcntl() system call -- executed by subject process.
  38  */
  39 int
  40 pr_fcntl(struct ps_prochandle *Pr, int fd, int cmd, void *argp)
  41 {
  42         sysret_t rval;                  /* return value from fcntl() */
  43         argdes_t argd[3];               /* arg descriptors for fcntl() */
  44         argdes_t *adp;
  45         int error;
  46
  47         if (Pr == NULL)         /* no subject process */
  48                 return (fcntl(fd, cmd, argp));
  49
  50         adp = &argd[0];         /* file descriptor argument */
  51         adp->arg_value = fd;
  52         adp->arg_object = NULL;
  53         adp->arg_type = AT_BYVAL;
  54         adp->arg_inout = AI_INPUT;
  55         adp->arg_size = 0;
  56
  57         adp++;                  /* cmd argument */
  58 #ifdef _LP64
  59         if (Pstatus(Pr)->pr_dmodel == PR_MODEL_ILP32) {
  60                 /*
  61                  * Guilty knowledge of the large file compilation environment
  62                  */
  63                 switch (cmd) {
  64                 case F_GETLK:
  65                         cmd = 33;
  66                         break;
  67                 case F_SETLK:
  68                         cmd = 34;
  69                         break;
  70                 case F_SETLKW:
  71                         cmd = 35;
  72                         break;
  73                 case F_FREESP:
  74                         cmd = 27;
  75                         break;
  76                 }
  77         }
  78 #endif  /* _LP64 */
  79         adp->arg_value = cmd;
  80         adp->arg_object = NULL;
  81         adp->arg_type = AT_BYVAL;
  82         adp->arg_inout = AI_INPUT;
  83         adp->arg_size = 0;
  84
  85         adp++;                  /* argp argument */
  86         if (argp == NULL) {
  87                 adp->arg_value = 0;
  88                 adp->arg_object = NULL;
  89                 adp->arg_type = AT_BYVAL;
  90                 adp->arg_inout = AI_INPUT;
  91                 adp->arg_size = 0;
  92         } else {
  93                 adp->arg_value = 0;
  94                 adp->arg_object = argp;
  95                 adp->arg_type = AT_BYREF;
  96                 adp->arg_inout = AI_INOUT;
  97                 switch (cmd) {
  98 #ifdef _LP64
  99                 case F_GETLK:
 100                 case F_SETLK:
 101                 case F_SETLKW:
 102                 case F_ALLOCSP:
 103                 case F_FREESP:
 104                         adp->arg_size = sizeof (struct flock);
 105                         break;
 106                 case 33:
 107                 case 34:
 108                 case 35:
 109                 case 27:
 110                         adp->arg_size = sizeof (struct flock64_32);
 111 #else   /* _LP64 */
 112                 case F_GETLK64:
 113                 case F_SETLK64:
 114                 case F_SETLKW64:
 115                 case F_FREESP64:
 116                         adp->arg_size = sizeof (struct flock64);
 117 #endif  /* _LP64 */
 118                         break;
 119                 case F_SHARE:
 120                 case F_UNSHARE:
 121                         adp->arg_size = sizeof (struct fshare);
 122                         break;
 123                 default:
 124                         adp->arg_value = (long)argp;
 125                         adp->arg_object = NULL;
 126                         adp->arg_type = AT_BYVAL;
 127                         adp->arg_inout = AI_INPUT;
 128                         adp->arg_size = 0;
 129                         break;
 130                 }
 131         }
 132
 133         error = Psyscall(Pr, &rval, SYS_fcntl, 3, &argd[0]);
 134
 135         if (error) {
 136                 errno = (error > 0)? error : ENOSYS;
 137                 return (-1);
 138         }
 139         return (rval.sys_rval1);
 140 }