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// OpenBSD 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 unix
14
15import (
16	"sort"
17	"syscall"
18	"unsafe"
19)
20
21// SockaddrDatalink implements the Sockaddr interface for AF_LINK type sockets.
22type SockaddrDatalink struct {
23	Len    uint8
24	Family uint8
25	Index  uint16
26	Type   uint8
27	Nlen   uint8
28	Alen   uint8
29	Slen   uint8
30	Data   [24]int8
31	raw    RawSockaddrDatalink
32}
33
34func Syscall9(trap, a1, a2, a3, a4, a5, a6, a7, a8, a9 uintptr) (r1, r2 uintptr, err syscall.Errno)
35
36func nametomib(name string) (mib []_C_int, err error) {
37	i := sort.Search(len(sysctlMib), func(i int) bool {
38		return sysctlMib[i].ctlname >= name
39	})
40	if i < len(sysctlMib) && sysctlMib[i].ctlname == name {
41		return sysctlMib[i].ctloid, nil
42	}
43	return nil, EINVAL
44}
45
46func direntIno(buf []byte) (uint64, bool) {
47	return readInt(buf, unsafe.Offsetof(Dirent{}.Fileno), unsafe.Sizeof(Dirent{}.Fileno))
48}
49
50func direntReclen(buf []byte) (uint64, bool) {
51	return readInt(buf, unsafe.Offsetof(Dirent{}.Reclen), unsafe.Sizeof(Dirent{}.Reclen))
52}
53
54func direntNamlen(buf []byte) (uint64, bool) {
55	return readInt(buf, unsafe.Offsetof(Dirent{}.Namlen), unsafe.Sizeof(Dirent{}.Namlen))
56}
57
58func SysctlClockinfo(name string) (*Clockinfo, error) {
59	mib, err := sysctlmib(name)
60	if err != nil {
61		return nil, err
62	}
63
64	n := uintptr(SizeofClockinfo)
65	var ci Clockinfo
66	if err := sysctl(mib, (*byte)(unsafe.Pointer(&ci)), &n, nil, 0); err != nil {
67		return nil, err
68	}
69	if n != SizeofClockinfo {
70		return nil, EIO
71	}
72	return &ci, nil
73}
74
75func SysctlUvmexp(name string) (*Uvmexp, error) {
76	mib, err := sysctlmib(name)
77	if err != nil {
78		return nil, err
79	}
80
81	n := uintptr(SizeofUvmexp)
82	var u Uvmexp
83	if err := sysctl(mib, (*byte)(unsafe.Pointer(&u)), &n, nil, 0); err != nil {
84		return nil, err
85	}
86	if n != SizeofUvmexp {
87		return nil, EIO
88	}
89	return &u, nil
90}
91
92//sysnb pipe(p *[2]_C_int) (err error)
93func Pipe(p []int) (err error) {
94	if len(p) != 2 {
95		return EINVAL
96	}
97	var pp [2]_C_int
98	err = pipe(&pp)
99	p[0] = int(pp[0])
100	p[1] = int(pp[1])
101	return
102}
103
104//sys Getdents(fd int, buf []byte) (n int, err error)
105func Getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error) {
106	n, err = Getdents(fd, buf)
107	if err != nil || basep == nil {
108		return
109	}
110
111	var off int64
112	off, err = Seek(fd, 0, 1 /* SEEK_CUR */)
113	if err != nil {
114		*basep = ^uintptr(0)
115		return
116	}
117	*basep = uintptr(off)
118	if unsafe.Sizeof(*basep) == 8 {
119		return
120	}
121	if off>>32 != 0 {
122		// We can't stuff the offset back into a uintptr, so any
123		// future calls would be suspect. Generate an error.
124		// EIO was allowed by getdirentries.
125		err = EIO
126	}
127	return
128}
129
130const ImplementsGetwd = true
131
132//sys	Getcwd(buf []byte) (n int, err error) = SYS___GETCWD
133
134func Getwd() (string, error) {
135	var buf [PathMax]byte
136	_, err := Getcwd(buf[0:])
137	if err != nil {
138		return "", err
139	}
140	n := clen(buf[:])
141	if n < 1 {
142		return "", EINVAL
143	}
144	return string(buf[:n]), nil
145}
146
147func Sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) {
148	if raceenabled {
149		raceReleaseMerge(unsafe.Pointer(&ioSync))
150	}
151	return sendfile(outfd, infd, offset, count)
152}
153
154// TODO
155func sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) {
156	return -1, ENOSYS
157}
158
159func Getfsstat(buf []Statfs_t, flags int) (n int, err error) {
160	var _p0 unsafe.Pointer
161	var bufsize uintptr
162	if len(buf) > 0 {
163		_p0 = unsafe.Pointer(&buf[0])
164		bufsize = unsafe.Sizeof(Statfs_t{}) * uintptr(len(buf))
165	}
166	r0, _, e1 := Syscall(SYS_GETFSSTAT, uintptr(_p0), bufsize, uintptr(flags))
167	n = int(r0)
168	if e1 != 0 {
169		err = e1
170	}
171	return
172}
173
174func setattrlistTimes(path string, times []Timespec, flags int) error {
175	// used on Darwin for UtimesNano
176	return ENOSYS
177}
178
179//sys	ioctl(fd int, req uint, arg uintptr) (err error)
180
181//sys   sysctl(mib []_C_int, old *byte, oldlen *uintptr, new *byte, newlen uintptr) (err error) = SYS___SYSCTL
182
183//sys	ppoll(fds *PollFd, nfds int, timeout *Timespec, sigmask *Sigset_t) (n int, err error)
184
185func Ppoll(fds []PollFd, timeout *Timespec, sigmask *Sigset_t) (n int, err error) {
186	if len(fds) == 0 {
187		return ppoll(nil, 0, timeout, sigmask)
188	}
189	return ppoll(&fds[0], len(fds), timeout, sigmask)
190}
191
192func Uname(uname *Utsname) error {
193	mib := []_C_int{CTL_KERN, KERN_OSTYPE}
194	n := unsafe.Sizeof(uname.Sysname)
195	if err := sysctl(mib, &uname.Sysname[0], &n, nil, 0); err != nil {
196		return err
197	}
198
199	mib = []_C_int{CTL_KERN, KERN_HOSTNAME}
200	n = unsafe.Sizeof(uname.Nodename)
201	if err := sysctl(mib, &uname.Nodename[0], &n, nil, 0); err != nil {
202		return err
203	}
204
205	mib = []_C_int{CTL_KERN, KERN_OSRELEASE}
206	n = unsafe.Sizeof(uname.Release)
207	if err := sysctl(mib, &uname.Release[0], &n, nil, 0); err != nil {
208		return err
209	}
210
211	mib = []_C_int{CTL_KERN, KERN_VERSION}
212	n = unsafe.Sizeof(uname.Version)
213	if err := sysctl(mib, &uname.Version[0], &n, nil, 0); err != nil {
214		return err
215	}
216
217	// The version might have newlines or tabs in it, convert them to
218	// spaces.
219	for i, b := range uname.Version {
220		if b == '\n' || b == '\t' {
221			if i == len(uname.Version)-1 {
222				uname.Version[i] = 0
223			} else {
224				uname.Version[i] = ' '
225			}
226		}
227	}
228
229	mib = []_C_int{CTL_HW, HW_MACHINE}
230	n = unsafe.Sizeof(uname.Machine)
231	if err := sysctl(mib, &uname.Machine[0], &n, nil, 0); err != nil {
232		return err
233	}
234
235	return nil
236}
237
238/*
239 * Exposed directly
240 */
241//sys	Access(path string, mode uint32) (err error)
242//sys	Adjtime(delta *Timeval, olddelta *Timeval) (err error)
243//sys	Chdir(path string) (err error)
244//sys	Chflags(path string, flags int) (err error)
245//sys	Chmod(path string, mode uint32) (err error)
246//sys	Chown(path string, uid int, gid int) (err error)
247//sys	Chroot(path string) (err error)
248//sys	Close(fd int) (err error)
249//sys	Dup(fd int) (nfd int, err error)
250//sys	Dup2(from int, to int) (err error)
251//sys	Exit(code int)
252//sys	Faccessat(dirfd int, path string, mode uint32, flags int) (err error)
253//sys	Fchdir(fd int) (err error)
254//sys	Fchflags(fd int, flags int) (err error)
255//sys	Fchmod(fd int, mode uint32) (err error)
256//sys	Fchmodat(dirfd int, path string, mode uint32, flags int) (err error)
257//sys	Fchown(fd int, uid int, gid int) (err error)
258//sys	Fchownat(dirfd int, path string, uid int, gid int, flags int) (err error)
259//sys	Flock(fd int, how int) (err error)
260//sys	Fpathconf(fd int, name int) (val int, err error)
261//sys	Fstat(fd int, stat *Stat_t) (err error)
262//sys	Fstatat(fd int, path string, stat *Stat_t, flags int) (err error)
263//sys	Fstatfs(fd int, stat *Statfs_t) (err error)
264//sys	Fsync(fd int) (err error)
265//sys	Ftruncate(fd int, length int64) (err error)
266//sysnb	Getegid() (egid int)
267//sysnb	Geteuid() (uid int)
268//sysnb	Getgid() (gid int)
269//sysnb	Getpgid(pid int) (pgid int, err error)
270//sysnb	Getpgrp() (pgrp int)
271//sysnb	Getpid() (pid int)
272//sysnb	Getppid() (ppid int)
273//sys	Getpriority(which int, who int) (prio int, err error)
274//sysnb	Getrlimit(which int, lim *Rlimit) (err error)
275//sysnb	Getrtable() (rtable int, err error)
276//sysnb	Getrusage(who int, rusage *Rusage) (err error)
277//sysnb	Getsid(pid int) (sid int, err error)
278//sysnb	Gettimeofday(tv *Timeval) (err error)
279//sysnb	Getuid() (uid int)
280//sys	Issetugid() (tainted bool)
281//sys	Kill(pid int, signum syscall.Signal) (err error)
282//sys	Kqueue() (fd int, err error)
283//sys	Lchown(path string, uid int, gid int) (err error)
284//sys	Link(path string, link string) (err error)
285//sys	Linkat(pathfd int, path string, linkfd int, link string, flags int) (err error)
286//sys	Listen(s int, backlog int) (err error)
287//sys	Lstat(path string, stat *Stat_t) (err error)
288//sys	Mkdir(path string, mode uint32) (err error)
289//sys	Mkdirat(dirfd int, path string, mode uint32) (err error)
290//sys	Mkfifo(path string, mode uint32) (err error)
291//sys	Mkfifoat(dirfd int, path string, mode uint32) (err error)
292//sys	Mknod(path string, mode uint32, dev int) (err error)
293//sys	Mknodat(dirfd int, path string, mode uint32, dev int) (err error)
294//sys	Nanosleep(time *Timespec, leftover *Timespec) (err error)
295//sys	Open(path string, mode int, perm uint32) (fd int, err error)
296//sys	Openat(dirfd int, path string, mode int, perm uint32) (fd int, err error)
297//sys	Pathconf(path string, name int) (val int, err error)
298//sys	Pread(fd int, p []byte, offset int64) (n int, err error)
299//sys	Pwrite(fd int, p []byte, offset int64) (n int, err error)
300//sys	read(fd int, p []byte) (n int, err error)
301//sys	Readlink(path string, buf []byte) (n int, err error)
302//sys	Readlinkat(dirfd int, path string, buf []byte) (n int, err error)
303//sys	Rename(from string, to string) (err error)
304//sys	Renameat(fromfd int, from string, tofd int, to string) (err error)
305//sys	Revoke(path string) (err error)
306//sys	Rmdir(path string) (err error)
307//sys	Seek(fd int, offset int64, whence int) (newoffset int64, err error) = SYS_LSEEK
308//sys	Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error)
309//sysnb	Setegid(egid int) (err error)
310//sysnb	Seteuid(euid int) (err error)
311//sysnb	Setgid(gid int) (err error)
312//sys	Setlogin(name string) (err error)
313//sysnb	Setpgid(pid int, pgid int) (err error)
314//sys	Setpriority(which int, who int, prio int) (err error)
315//sysnb	Setregid(rgid int, egid int) (err error)
316//sysnb	Setreuid(ruid int, euid int) (err error)
317//sysnb	Setresgid(rgid int, egid int, sgid int) (err error)
318//sysnb	Setresuid(ruid int, euid int, suid int) (err error)
319//sysnb	Setrlimit(which int, lim *Rlimit) (err error)
320//sysnb	Setrtable(rtable int) (err error)
321//sysnb	Setsid() (pid int, err error)
322//sysnb	Settimeofday(tp *Timeval) (err error)
323//sysnb	Setuid(uid int) (err error)
324//sys	Stat(path string, stat *Stat_t) (err error)
325//sys	Statfs(path string, stat *Statfs_t) (err error)
326//sys	Symlink(path string, link string) (err error)
327//sys	Symlinkat(oldpath string, newdirfd int, newpath string) (err error)
328//sys	Sync() (err error)
329//sys	Truncate(path string, length int64) (err error)
330//sys	Umask(newmask int) (oldmask int)
331//sys	Unlink(path string) (err error)
332//sys	Unlinkat(dirfd int, path string, flags int) (err error)
333//sys	Unmount(path string, flags int) (err error)
334//sys	write(fd int, p []byte) (n int, err error)
335//sys	mmap(addr uintptr, length uintptr, prot int, flag int, fd int, pos int64) (ret uintptr, err error)
336//sys	munmap(addr uintptr, length uintptr) (err error)
337//sys	readlen(fd int, buf *byte, nbuf int) (n int, err error) = SYS_READ
338//sys	writelen(fd int, buf *byte, nbuf int) (n int, err error) = SYS_WRITE
339//sys	utimensat(dirfd int, path string, times *[2]Timespec, flags int) (err error)
340
341/*
342 * Unimplemented
343 */
344// __getcwd
345// __semctl
346// __syscall
347// __sysctl
348// adjfreq
349// break
350// clock_getres
351// clock_gettime
352// clock_settime
353// closefrom
354// execve
355// fcntl
356// fhopen
357// fhstat
358// fhstatfs
359// fork
360// futimens
361// getfh
362// getgid
363// getitimer
364// getlogin
365// getresgid
366// getresuid
367// getthrid
368// ktrace
369// lfs_bmapv
370// lfs_markv
371// lfs_segclean
372// lfs_segwait
373// mincore
374// minherit
375// mount
376// mquery
377// msgctl
378// msgget
379// msgrcv
380// msgsnd
381// nfssvc
382// nnpfspioctl
383// preadv
384// profil
385// pwritev
386// quotactl
387// readv
388// reboot
389// renameat
390// rfork
391// sched_yield
392// semget
393// semop
394// setgroups
395// setitimer
396// setsockopt
397// shmat
398// shmctl
399// shmdt
400// shmget
401// sigaction
402// sigaltstack
403// sigpending
404// sigprocmask
405// sigreturn
406// sigsuspend
407// sysarch
408// syscall
409// threxit
410// thrsigdivert
411// thrsleep
412// thrwakeup
413// vfork
414// writev
415