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
pr_fcntl(struct ps_prochandle * Pr,int fd,int cmd,void * argp)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 case F_GETLK:
99 case F_SETLK:
100 case F_SETLKW:
101 case F_ALLOCSP:
102 case F_FREESP:
103 adp->arg_size = sizeof (struct flock);
104 break;
105 #ifdef _LP64
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 }
141