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 (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22/*
23 * Copyright (c) 1998, 2010, Oracle and/or its affiliates. All rights reserved.
24 */
25
26#include <stdlib.h>
27#include <unistd.h>
28#include <string.h>
29#include <errno.h>
30#include "libproc.h"
31
32/*
33 * rename() system call -- executed by subject process.
34 */
35int
36pr_rename(struct ps_prochandle *Pr, const char *old, const char *new)
37{
38	sysret_t rval;
39	argdes_t argd[4];
40	argdes_t *adp;
41	int error;
42
43	if (Pr == NULL)
44		return (rename(old, new));
45
46	adp = &argd[0];		/* old fd argument */
47	adp->arg_value = AT_FDCWD;
48	adp->arg_object = NULL;
49	adp->arg_type = AT_BYVAL;
50	adp->arg_inout = AI_INPUT;
51	adp->arg_size = 0;
52
53	adp++;			/* move to old argument */
54	adp->arg_value = 0;
55	adp->arg_object = (void *)old;
56	adp->arg_type = AT_BYREF;
57	adp->arg_inout = AI_INPUT;
58	adp->arg_size = strlen(old) + 1;
59
60	adp++;			/* move to new fd argument */
61	adp->arg_value = AT_FDCWD;
62	adp->arg_object = NULL;
63	adp->arg_type = AT_BYVAL;
64	adp->arg_inout = AI_INPUT;
65	adp->arg_size = 0;
66
67	adp++;			/* move to new argument */
68	adp->arg_value = 0;
69	adp->arg_object = (void *)new;
70	adp->arg_type = AT_BYREF;
71	adp->arg_inout = AI_INPUT;
72	adp->arg_size = strlen(new) + 1;
73
74	error = Psyscall(Pr, &rval, SYS_renameat, 4, &argd[0]);
75
76	if (error) {
77		errno = (error > 0) ? error : ENOSYS;
78		return (-1);
79	}
80	return (rval.sys_rval1);
81}
82
83/*
84 * link() system call -- executed by subject process.
85 */
86int
87pr_link(struct ps_prochandle *Pr, const char *existing, const char *new)
88{
89	sysret_t rval;
90	argdes_t argd[5];
91	argdes_t *adp;
92	int error;
93
94	if (Pr == NULL)
95		return (link(existing, new));
96
97	adp = &argd[0];		/* first directory fd argument */
98	adp->arg_value = AT_FDCWD;
99	adp->arg_object = NULL;
100	adp->arg_type = AT_BYVAL;
101	adp->arg_inout = AI_INPUT;
102	adp->arg_size = 0;
103
104	adp++;			/* existing argument */
105	adp->arg_value = 0;
106	adp->arg_object = (void *)existing;
107	adp->arg_type = AT_BYREF;
108	adp->arg_inout = AI_INPUT;
109	adp->arg_size = strlen(existing) + 1;
110
111	adp++;			/* second directory fd argument */
112	adp->arg_value = AT_FDCWD;
113	adp->arg_object = NULL;
114	adp->arg_type = AT_BYVAL;
115	adp->arg_inout = AI_INPUT;
116	adp->arg_size = 0;
117
118	adp++;			/* new argument */
119	adp->arg_value = 0;
120	adp->arg_object = (void *)new;
121	adp->arg_type = AT_BYREF;
122	adp->arg_inout = AI_INPUT;
123	adp->arg_size = strlen(new) + 1;
124
125	adp++;			/* flag argument */
126	adp->arg_value = 0;
127	adp->arg_object = NULL;
128	adp->arg_type = AT_BYVAL;
129	adp->arg_inout = AI_INPUT;
130	adp->arg_size = 0;
131
132	error = Psyscall(Pr, &rval, SYS_linkat, 5, &argd[0]);
133
134	if (error) {
135		errno = (error > 0) ? error : ENOSYS;
136		return (-1);
137	}
138	return (rval.sys_rval1);
139}
140
141/*
142 * unlink() system call -- executed by subject process.
143 */
144int
145pr_unlink(struct ps_prochandle *Pr, const char *path)
146{
147	sysret_t rval;
148	argdes_t argd[3];
149	argdes_t *adp;
150	int error;
151
152	if (Pr == NULL)
153		return (unlink(path));
154
155	adp = &argd[0];		/* directory fd argument */
156	adp->arg_value = AT_FDCWD;
157	adp->arg_object = NULL;
158	adp->arg_type = AT_BYVAL;
159	adp->arg_inout = AI_INPUT;
160	adp->arg_size = 0;
161	adp++;			/* move to path argument */
162
163	adp->arg_value = 0;
164	adp->arg_object = (void *)path;
165	adp->arg_type = AT_BYREF;
166	adp->arg_inout = AI_INPUT;
167	adp->arg_size = strlen(path) + 1;
168	adp++;			/* move to flags argument */
169
170	adp->arg_value = 0;
171	adp->arg_object = NULL;
172	adp->arg_type = AT_BYVAL;
173	adp->arg_inout = AI_INPUT;
174	adp->arg_size = 0;
175
176	error = Psyscall(Pr, &rval, SYS_unlinkat, 3, &argd[0]);
177
178	if (error) {
179		errno = (error > 0) ? error : ENOSYS;
180		return (-1);
181	}
182	return (rval.sys_rval1);
183}
184