1 /* $OpenBSD: freebsd_misc.c,v 1.10 2007/04/05 15:33:42 tedu Exp $ */
2 /* $NetBSD: freebsd_misc.c,v 1.2 1996/05/03 17:03:10 christos Exp $ */
3
4 /*
5 * Copyright (c) 1995 Frank van der Linden
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed for the NetBSD Project
19 * by Frank van der Linden
20 * 4. The name of the author may not be used to endorse or promote products
21 * derived from this software without specific prior written permission
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
24 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
25 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
26 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
27 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
28 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
29 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
30 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
31 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
32 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 */
34
35 /*
36 * FreeBSD compatibility module. Try to deal with various FreeBSD system calls.
37 */
38
39 #include <sys/param.h>
40 #include <sys/systm.h>
41 #include <sys/proc.h>
42 #include <sys/mount.h>
43 #include <sys/file.h>
44 #include <sys/dirent.h>
45 #include <sys/filedesc.h>
46 #include <sys/mman.h>
47 #include <sys/vnode.h>
48
49 #include <sys/syscallargs.h>
50
51 #include <compat/freebsd/freebsd_signal.h>
52 #include <compat/freebsd/freebsd_syscallargs.h>
53 #include <compat/freebsd/freebsd_util.h>
54 #include <compat/freebsd/freebsd_rtprio.h>
55
56 #include <compat/common/compat_dir.h>
57
58 /* just a place holder */
59
60 int
61 freebsd_sys_rtprio(p, v, retval)
62 struct proc *p;
63 void *v;
64 register_t *retval;
65 {
66 #ifdef notyet
67 struct freebsd_sys_rtprio_args /* {
68 syscallarg(int) function;
69 syscallarg(pid_t) pid;
70 syscallarg(struct freebsd_rtprio *) rtp;
71 } */ *uap = v;
72 #endif
73
74 return ENOSYS; /* XXX */
75 }
76
77 /*
78 * Argh.
79 * The syscalls.master mechanism cannot handle a system call that is in
80 * two spots in the table.
81 */
82 int
83 freebsd_sys_poll2(p, v, retval)
84 struct proc *p;
85 void *v;
86 register_t *retval;
87 {
88 return (sys_poll(p, v, retval));
89 }
90
91 /*
92 * Our madvise is currently dead (always returns EOPNOTSUPP).
93 */
94 int
95 freebsd_sys_madvise(p, v, retval)
96 struct proc *p;
97 void *v;
98 register_t *retval;
99 {
100 return (0);
101 }
102
103
104 int freebsd_readdir_callback(void *, struct dirent *, off_t);
105
106 struct freebsd_readdir_callback_args {
107 caddr_t outp;
108 int resid;
109 };
110
111 int
112 freebsd_readdir_callback(void *arg, struct dirent *bdp, off_t cookie)
113 {
114 struct freebsd_readdir_callback_args *cb = arg;
115 struct dirent idb;
116 int error;
117
118 if (cb->resid < bdp->d_reclen)
119 return (ENOMEM);
120 idb.d_fileno = bdp->d_fileno;
121 idb.d_reclen = bdp->d_reclen;
122 idb.d_type = bdp->d_type;
123 idb.d_namlen = bdp->d_namlen;
124 strlcpy(idb.d_name, bdp->d_name, sizeof(idb.d_name));
125
126 if ((error = copyout((caddr_t)&idb, cb->outp, bdp->d_reclen)))
127 return (error);
128 cb->outp += bdp->d_reclen;
129 cb->resid -= bdp->d_reclen;
130
131 return (0);
132 }
133
134 int
135 freebsd_sys_getdents(struct proc *p, void *v, register_t *retval)
136 {
137 struct freebsd_sys_getdents_args /* {
138 syscallarg(int) fd;
139 syscallarg(void *) dirent;
140 syscallarg(unsigned) count;
141 } */ *uap = v;
142 struct vnode *vp;
143 struct file *fp;
144 int error;
145 struct freebsd_readdir_callback_args args;
146
147 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)
148 return (error);
149
150 vp = (struct vnode *)fp->f_data;
151
152 args.resid = SCARG(uap, count);
153 args.outp = (caddr_t)SCARG(uap, dirent);
154
155 error = readdir_with_callback(fp, &fp->f_offset, args.resid,
156 freebsd_readdir_callback, &args);
157
158 FRELE(fp);
159 if (error)
160 return (error);
161
162 *retval = SCARG(uap, count) - args.resid;
163 return (0);
164 }
165
166 #define FBSD_MAP_NOCORE 0x20000
167 int
168 freebsd_sys_mmap(struct proc *p, void *v, register_t *retval)
169 {
170 struct freebsd_sys_mmap_args /* {
171 syscallarg(caddr_t) addr;
172 syscallarg(size_t) len;
173 syscallarg(int) prot;
174 syscallarg(int) flags;
175 syscallarg(int) fd;
176 syscallarg(long) pad;
177 syscallarg(off_t) pos;
178 } */ *uap = v;
179 SCARG(uap, flags) &= ~FBSD_MAP_NOCORE;
180 return (sys_mmap(p, uap, retval));
181 }