1// Copyright 2009,2010 The Go Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style
3// license that can be found in the LICENSE file.
4
5// NetBSD system calls.
6// This file is compiled as ordinary Go code,
7// but it is also input to mksyscall,
8// which parses the //sys lines and generates system call stubs.
9// Note that sometimes we use a lowercase //sys name and wrap
10// it in our own nicer implementation, either here or in
11// syscall_bsd.go or syscall_unix.go.
12
13package syscall
14
15import "unsafe"
16
17func Syscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno)
18func Syscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err Errno)
19func Syscall9(num, a1, a2, a3, a4, a5, a6, a7, a8, a9 uintptr) (r1, r2 uintptr, err Errno)
20func RawSyscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno)
21func RawSyscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err Errno)
22
23const (
24	_SYS_DUP3         = SYS_DUP3
25	_F_DUP2FD_CLOEXEC = 0
26)
27
28type SockaddrDatalink struct {
29	Len    uint8
30	Family uint8
31	Index  uint16
32	Type   uint8
33	Nlen   uint8
34	Alen   uint8
35	Slen   uint8
36	Data   [12]int8
37	raw    RawSockaddrDatalink
38}
39
40func sysctlNodes(mib []_C_int) (nodes []Sysctlnode, err error) {
41	var olen uintptr
42
43	// Get a list of all sysctl nodes below the given MIB by performing
44	// a sysctl for the given MIB with CTL_QUERY appended.
45	mib = append(mib, CTL_QUERY)
46	qnode := Sysctlnode{Flags: SYSCTL_VERS_1}
47	qp := (*byte)(unsafe.Pointer(&qnode))
48	sz := unsafe.Sizeof(qnode)
49	if err = sysctl(mib, nil, &olen, qp, sz); err != nil {
50		return nil, err
51	}
52
53	// Now that we know the size, get the actual nodes.
54	nodes = make([]Sysctlnode, olen/sz)
55	np := (*byte)(unsafe.Pointer(&nodes[0]))
56	if err = sysctl(mib, np, &olen, qp, sz); err != nil {
57		return nil, err
58	}
59
60	return nodes, nil
61}
62
63func nametomib(name string) (mib []_C_int, err error) {
64	// Split name into components.
65	var parts []string
66	last := 0
67	for i := 0; i < len(name); i++ {
68		if name[i] == '.' {
69			parts = append(parts, name[last:i])
70			last = i + 1
71		}
72	}
73	parts = append(parts, name[last:])
74
75	// Discover the nodes and construct the MIB OID.
76	for partno, part := range parts {
77		nodes, err := sysctlNodes(mib)
78		if err != nil {
79			return nil, err
80		}
81		for _, node := range nodes {
82			n := make([]byte, 0)
83			for i := range node.Name {
84				if node.Name[i] != 0 {
85					n = append(n, byte(node.Name[i]))
86				}
87			}
88			if string(n) == part {
89				mib = append(mib, _C_int(node.Num))
90				break
91			}
92		}
93		if len(mib) != partno+1 {
94			return nil, EINVAL
95		}
96	}
97
98	return mib, nil
99}
100
101func direntIno(buf []byte) (uint64, bool) {
102	return readInt(buf, unsafe.Offsetof(Dirent{}.Fileno), unsafe.Sizeof(Dirent{}.Fileno))
103}
104
105func direntReclen(buf []byte) (uint64, bool) {
106	return readInt(buf, unsafe.Offsetof(Dirent{}.Reclen), unsafe.Sizeof(Dirent{}.Reclen))
107}
108
109func direntNamlen(buf []byte) (uint64, bool) {
110	return readInt(buf, unsafe.Offsetof(Dirent{}.Namlen), unsafe.Sizeof(Dirent{}.Namlen))
111}
112
113func Pipe(p []int) (err error) {
114	return Pipe2(p, 0)
115}
116
117//sysnb pipe2(p *[2]_C_int, flags int) (err error)
118
119func Pipe2(p []int, flags int) error {
120	if len(p) != 2 {
121		return EINVAL
122	}
123	var pp [2]_C_int
124	err := pipe2(&pp, flags)
125	if err == nil {
126		p[0] = int(pp[0])
127		p[1] = int(pp[1])
128	}
129	return err
130}
131
132//sys paccept(fd int, rsa *RawSockaddrAny, addrlen *_Socklen, sigmask *sigset, flags int) (nfd int, err error)
133
134func Accept4(fd, flags int) (nfd int, sa Sockaddr, err error) {
135	var rsa RawSockaddrAny
136	var len _Socklen = SizeofSockaddrAny
137	nfd, err = paccept(fd, &rsa, &len, nil, flags)
138	if err != nil {
139		return
140	}
141	if len > SizeofSockaddrAny {
142		panic("RawSockaddrAny too small")
143	}
144	sa, err = anyToSockaddr(&rsa)
145	if err != nil {
146		Close(nfd)
147		nfd = 0
148	}
149	return
150}
151
152//sys getdents(fd int, buf []byte) (n int, err error)
153
154func Getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error) {
155	return getdents(fd, buf)
156}
157
158// TODO, see golang.org/issue/5847
159func sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) {
160	return -1, ENOSYS
161}
162
163/*
164 * Exposed directly
165 */
166//sys	Access(path string, mode uint32) (err error)
167//sys	Adjtime(delta *Timeval, olddelta *Timeval) (err error)
168//sys	Chdir(path string) (err error)
169//sys	Chflags(path string, flags int) (err error)
170//sys	Chmod(path string, mode uint32) (err error)
171//sys	Chown(path string, uid int, gid int) (err error)
172//sys	Chroot(path string) (err error)
173//sys	Close(fd int) (err error)
174//sys	Dup(fd int) (nfd int, err error)
175//sys	Dup2(from int, to int) (err error)
176//sys	Fchdir(fd int) (err error)
177//sys	Fchflags(fd int, flags int) (err error)
178//sys	Fchmod(fd int, mode uint32) (err error)
179//sys	Fchown(fd int, uid int, gid int) (err error)
180//sys	Flock(fd int, how int) (err error)
181//sys	Fpathconf(fd int, name int) (val int, err error)
182//sys	Fstat(fd int, stat *Stat_t) (err error)
183//sys	Fsync(fd int) (err error)
184//sys	Ftruncate(fd int, length int64) (err error)
185//sysnb	Getegid() (egid int)
186//sysnb	Geteuid() (uid int)
187//sysnb	Getgid() (gid int)
188//sysnb	Getpgid(pid int) (pgid int, err error)
189//sysnb	Getpgrp() (pgrp int)
190//sysnb	Getpid() (pid int)
191//sysnb	Getppid() (ppid int)
192//sys	Getpriority(which int, who int) (prio int, err error)
193//sysnb	Getrlimit(which int, lim *Rlimit) (err error)
194//sysnb	Getrusage(who int, rusage *Rusage) (err error)
195//sysnb	Getsid(pid int) (sid int, err error)
196//sysnb	Gettimeofday(tv *Timeval) (err error)
197//sysnb	Getuid() (uid int)
198//sys	Issetugid() (tainted bool)
199//sys	Kill(pid int, signum Signal) (err error)
200//sys	Kqueue() (fd int, err error)
201//sys	Lchown(path string, uid int, gid int) (err error)
202//sys	Link(path string, link string) (err error)
203//sys	Listen(s int, backlog int) (err error)
204//sys	Lstat(path string, stat *Stat_t) (err error)
205//sys	Mkdir(path string, mode uint32) (err error)
206//sys	Mkfifo(path string, mode uint32) (err error)
207//sys	Mknod(path string, mode uint32, dev int) (err error)
208//sys	Nanosleep(time *Timespec, leftover *Timespec) (err error)
209//sys	Open(path string, mode int, perm uint32) (fd int, err error)
210//sys	Pathconf(path string, name int) (val int, err error)
211//sys	pread(fd int, p []byte, offset int64) (n int, err error)
212//sys	pwrite(fd int, p []byte, offset int64) (n int, err error)
213//sys	read(fd int, p []byte) (n int, err error)
214//sys	Readlink(path string, buf []byte) (n int, err error)
215//sys	Rename(from string, to string) (err error)
216//sys	Revoke(path string) (err error)
217//sys	Rmdir(path string) (err error)
218//sys	Seek(fd int, offset int64, whence int) (newoffset int64, err error) = SYS_LSEEK
219//sys	Select(n int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (err error)
220//sysnb	Setegid(egid int) (err error)
221//sysnb	Seteuid(euid int) (err error)
222//sysnb	Setgid(gid int) (err error)
223//sysnb	Setpgid(pid int, pgid int) (err error)
224//sys	Setpriority(which int, who int, prio int) (err error)
225//sysnb	Setregid(rgid int, egid int) (err error)
226//sysnb	Setreuid(ruid int, euid int) (err error)
227//sysnb	setrlimit(which int, lim *Rlimit) (err error)
228//sysnb	Setsid() (pid int, err error)
229//sysnb	Settimeofday(tp *Timeval) (err error)
230//sysnb	Setuid(uid int) (err error)
231//sys	Stat(path string, stat *Stat_t) (err error)
232//sys	Symlink(path string, link string) (err error)
233//sys	Sync() (err error)
234//sys	Truncate(path string, length int64) (err error)
235//sys	Umask(newmask int) (oldmask int)
236//sys	Unlink(path string) (err error)
237//sys	Unmount(path string, flags int) (err error)
238//sys	write(fd int, p []byte) (n int, err error)
239//sys	mmap(addr uintptr, length uintptr, prot int, flag int, fd int, pos int64) (ret uintptr, err error)
240//sys	munmap(addr uintptr, length uintptr) (err error)
241//sys	readlen(fd int, buf *byte, nbuf int) (n int, err error) = SYS_READ
242//sys	utimensat(dirfd int, path string, times *[2]Timespec, flag int) (err error)
243//sys	getcwd(buf []byte) (n int, err error) = SYS___GETCWD
244//sys	sysctl(mib []_C_int, old *byte, oldlen *uintptr, new *byte, newlen uintptr) (err error) = SYS___SYSCTL
245