1// Copyright 2019 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
5package syscall
6
7import "unsafe"
8
9const (
10	_SYS_dup       = SYS_DUP3
11	_SYS_setgroups = SYS_SETGROUPS
12)
13
14func EpollCreate(size int) (fd int, err error) {
15	if size <= 0 {
16		return -1, EINVAL
17	}
18	return EpollCreate1(0)
19}
20
21//sys	EpollWait(epfd int, events []EpollEvent, msec int) (n int, err error) = SYS_EPOLL_PWAIT
22//sys	Fchown(fd int, uid int, gid int) (err error)
23//sys	Fstat(fd int, stat *Stat_t) (err error)
24//sys	Fstatat(fd int, path string, stat *Stat_t, flags int) (err error)
25//sys	fstatat(dirfd int, path string, stat *Stat_t, flags int) (err error)
26//sys	Fstatfs(fd int, buf *Statfs_t) (err error)
27//sys	Ftruncate(fd int, length int64) (err error)
28//sysnb	Getegid() (egid int)
29//sysnb	Geteuid() (euid int)
30//sysnb	Getgid() (gid int)
31//sysnb	Getrlimit(resource int, rlim *Rlimit) (err error)
32//sysnb	Getuid() (uid int)
33//sys	Listen(s int, n int) (err error)
34//sys	Pread(fd int, p []byte, offset int64) (n int, err error) = SYS_PREAD64
35//sys	Pwrite(fd int, p []byte, offset int64) (n int, err error) = SYS_PWRITE64
36//sys	renameat2(olddirfd int, oldpath string, newdirfd int, newpath string, flags uint) (err error)
37//sys	Seek(fd int, offset int64, whence int) (off int64, err error) = SYS_LSEEK
38//sys	sendfile(outfd int, infd int, offset *int64, count int) (written int, err error)
39//sys	Setfsgid(gid int) (err error)
40//sys	Setfsuid(uid int) (err error)
41//sysnb	Setregid(rgid int, egid int) (err error)
42//sysnb	Setresgid(rgid int, egid int, sgid int) (err error)
43//sysnb	Setresuid(ruid int, euid int, suid int) (err error)
44//sysnb	Setrlimit(resource int, rlim *Rlimit) (err error)
45//sysnb	Setreuid(ruid int, euid int) (err error)
46//sys	Shutdown(fd int, how int) (err error)
47//sys	Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int64, err error)
48
49func Renameat(olddirfd int, oldpath string, newdirfd int, newpath string) (err error) {
50	return renameat2(olddirfd, oldpath, newdirfd, newpath, 0)
51}
52
53func Stat(path string, stat *Stat_t) (err error) {
54	return Fstatat(_AT_FDCWD, path, stat, 0)
55}
56
57func Lchown(path string, uid int, gid int) (err error) {
58	return Fchownat(_AT_FDCWD, path, uid, gid, _AT_SYMLINK_NOFOLLOW)
59}
60
61func Lstat(path string, stat *Stat_t) (err error) {
62	return Fstatat(_AT_FDCWD, path, stat, _AT_SYMLINK_NOFOLLOW)
63}
64
65//sys	Statfs(path string, buf *Statfs_t) (err error)
66//sys	SyncFileRange(fd int, off int64, n int64, flags int) (err error)
67//sys	Truncate(path string, length int64) (err error)
68//sys	accept(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (fd int, err error)
69//sys	accept4(s int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (fd int, err error)
70//sys	bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
71//sys	connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
72//sysnb	getgroups(n int, list *_Gid_t) (nn int, err error)
73//sysnb	setgroups(n int, list *_Gid_t) (err error)
74//sys	getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error)
75//sys	setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error)
76//sysnb	socket(domain int, typ int, proto int) (fd int, err error)
77//sysnb	socketpair(domain int, typ int, proto int, fd *[2]int32) (err error)
78//sysnb	getpeername(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error)
79//sysnb	getsockname(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error)
80//sys	recvfrom(fd int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (n int, err error)
81//sys	sendto(s int, buf []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (err error)
82//sys	recvmsg(s int, msg *Msghdr, flags int) (n int, err error)
83//sys	sendmsg(s int, msg *Msghdr, flags int) (n int, err error)
84//sys	mmap(addr uintptr, length uintptr, prot int, flags int, fd int, offset int64) (xaddr uintptr, err error)
85
86type sigset_t struct {
87	X__val [16]uint64
88}
89
90//sys	pselect(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timespec, sigmask *sigset_t) (n int, err error) = SYS_PSELECT6
91
92func Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error) {
93	var ts *Timespec
94	if timeout != nil {
95		ts = &Timespec{Sec: timeout.Sec, Nsec: timeout.Usec * 1000}
96	}
97	return pselect(nfd, r, w, e, ts, nil)
98}
99
100//sysnb	Gettimeofday(tv *Timeval) (err error)
101
102func setTimespec(sec, nsec int64) Timespec {
103	return Timespec{Sec: sec, Nsec: nsec}
104}
105
106func setTimeval(sec, usec int64) Timeval {
107	return Timeval{Sec: sec, Usec: usec}
108}
109
110func futimesat(dirfd int, path string, tv *[2]Timeval) (err error) {
111	if tv == nil {
112		return utimensat(dirfd, path, nil, 0)
113	}
114
115	ts := []Timespec{
116		NsecToTimespec(TimevalToNsec(tv[0])),
117		NsecToTimespec(TimevalToNsec(tv[1])),
118	}
119	return utimensat(dirfd, path, (*[2]Timespec)(unsafe.Pointer(&ts[0])), 0)
120}
121
122func Time(t *Time_t) (Time_t, error) {
123	var tv Timeval
124	err := Gettimeofday(&tv)
125	if err != nil {
126		return 0, err
127	}
128	if t != nil {
129		*t = Time_t(tv.Sec)
130	}
131	return Time_t(tv.Sec), nil
132}
133
134func Utime(path string, buf *Utimbuf) error {
135	tv := []Timeval{
136		{Sec: buf.Actime},
137		{Sec: buf.Modtime},
138	}
139	return Utimes(path, tv)
140}
141
142func utimes(path string, tv *[2]Timeval) (err error) {
143	if tv == nil {
144		return utimensat(_AT_FDCWD, path, nil, 0)
145	}
146
147	ts := []Timespec{
148		NsecToTimespec(TimevalToNsec(tv[0])),
149		NsecToTimespec(TimevalToNsec(tv[1])),
150	}
151	return utimensat(_AT_FDCWD, path, (*[2]Timespec)(unsafe.Pointer(&ts[0])), 0)
152}
153
154func Pipe(p []int) (err error) {
155	if len(p) != 2 {
156		return EINVAL
157	}
158	var pp [2]_C_int
159	err = pipe2(&pp, 0)
160	p[0] = int(pp[0])
161	p[1] = int(pp[1])
162	return
163}
164
165//sysnb pipe2(p *[2]_C_int, flags int) (err error)
166
167func Pipe2(p []int, flags int) (err error) {
168	if len(p) != 2 {
169		return EINVAL
170	}
171	var pp [2]_C_int
172	err = pipe2(&pp, flags)
173	p[0] = int(pp[0])
174	p[1] = int(pp[1])
175	return
176}
177
178func (r *PtraceRegs) PC() uint64 { return r.Pc }
179
180func (r *PtraceRegs) SetPC(pc uint64) { r.Pc = pc }
181
182func (iov *Iovec) SetLen(length int) {
183	iov.Len = uint64(length)
184}
185
186func (msghdr *Msghdr) SetControllen(length int) {
187	msghdr.Controllen = uint64(length)
188}
189
190func (cmsg *Cmsghdr) SetLen(length int) {
191	cmsg.Len = uint64(length)
192}
193
194func InotifyInit() (fd int, err error) {
195	return InotifyInit1(0)
196}
197
198//sys	ppoll(fds *pollFd, nfds int, timeout *Timespec, sigmask *sigset_t) (n int, err error)
199
200func Pause() error {
201	_, err := ppoll(nil, 0, nil, nil)
202	return err
203}
204
205func rawVforkSyscall(trap, a1 uintptr) (r1 uintptr, err Errno) {
206	panic("not implemented")
207}
208