1// Copyright 2009 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// +build amd64,linux
6
7package unix
8
9//sys	Dup2(oldfd int, newfd int) (err error)
10//sysnb	EpollCreate(size int) (fd int, err error)
11//sys	EpollWait(epfd int, events []EpollEvent, msec int) (n int, err error)
12//sys	Fadvise(fd int, offset int64, length int64, advice int) (err error) = SYS_FADVISE64
13//sys	Fchown(fd int, uid int, gid int) (err error)
14//sys	Fstat(fd int, stat *Stat_t) (err error)
15//sys	Fstatat(dirfd int, path string, stat *Stat_t, flags int) (err error) = SYS_NEWFSTATAT
16//sys	Fstatfs(fd int, buf *Statfs_t) (err error)
17//sys	Ftruncate(fd int, length int64) (err error)
18//sysnb	Getegid() (egid int)
19//sysnb	Geteuid() (euid int)
20//sysnb	Getgid() (gid int)
21//sysnb	Getrlimit(resource int, rlim *Rlimit) (err error)
22//sysnb	Getuid() (uid int)
23//sysnb	inotifyInit() (fd int, err error)
24
25func InotifyInit() (fd int, err error) {
26	// First try inotify_init1, because Android's seccomp policy blocks the latter.
27	fd, err = InotifyInit1(0)
28	if err == ENOSYS {
29		fd, err = inotifyInit()
30	}
31	return
32}
33
34//sys	Ioperm(from int, num int, on int) (err error)
35//sys	Iopl(level int) (err error)
36//sys	Lchown(path string, uid int, gid int) (err error)
37//sys	Listen(s int, n int) (err error)
38
39func Lstat(path string, stat *Stat_t) (err error) {
40	return Fstatat(AT_FDCWD, path, stat, AT_SYMLINK_NOFOLLOW)
41}
42
43//sys	Pause() (err error)
44//sys	Pread(fd int, p []byte, offset int64) (n int, err error) = SYS_PREAD64
45//sys	Pwrite(fd int, p []byte, offset int64) (n int, err error) = SYS_PWRITE64
46//sys	Renameat(olddirfd int, oldpath string, newdirfd int, newpath string) (err error)
47//sys	Seek(fd int, offset int64, whence int) (off int64, err error) = SYS_LSEEK
48
49func Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error) {
50	var ts *Timespec
51	if timeout != nil {
52		ts = &Timespec{Sec: timeout.Sec, Nsec: timeout.Usec * 1000}
53	}
54	return Pselect(nfd, r, w, e, ts, nil)
55}
56
57//sys	sendfile(outfd int, infd int, offset *int64, count int) (written int, err error)
58//sys	setfsgid(gid int) (prev int, err error)
59//sys	setfsuid(uid int) (prev int, err error)
60//sysnb	Setregid(rgid int, egid int) (err error)
61//sysnb	Setresgid(rgid int, egid int, sgid int) (err error)
62//sysnb	Setresuid(ruid int, euid int, suid int) (err error)
63//sysnb	Setrlimit(resource int, rlim *Rlimit) (err error)
64//sysnb	Setreuid(ruid int, euid int) (err error)
65//sys	Shutdown(fd int, how int) (err error)
66//sys	Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int64, err error)
67
68func Stat(path string, stat *Stat_t) (err error) {
69	// Use fstatat, because Android's seccomp policy blocks stat.
70	return Fstatat(AT_FDCWD, path, stat, 0)
71}
72
73//sys	Statfs(path string, buf *Statfs_t) (err error)
74//sys	SyncFileRange(fd int, off int64, n int64, flags int) (err error)
75//sys	Truncate(path string, length int64) (err error)
76//sys	Ustat(dev int, ubuf *Ustat_t) (err error)
77//sys	accept(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (fd int, err error)
78//sys	accept4(s int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (fd int, err error)
79//sys	bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
80//sys	connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
81//sysnb	getgroups(n int, list *_Gid_t) (nn int, err error)
82//sysnb	setgroups(n int, list *_Gid_t) (err error)
83//sys	getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error)
84//sys	setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error)
85//sysnb	socket(domain int, typ int, proto int) (fd int, err error)
86//sysnb	socketpair(domain int, typ int, proto int, fd *[2]int32) (err error)
87//sysnb	getpeername(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error)
88//sysnb	getsockname(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error)
89//sys	recvfrom(fd int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (n int, err error)
90//sys	sendto(s int, buf []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (err error)
91//sys	recvmsg(s int, msg *Msghdr, flags int) (n int, err error)
92//sys	sendmsg(s int, msg *Msghdr, flags int) (n int, err error)
93//sys	mmap(addr uintptr, length uintptr, prot int, flags int, fd int, offset int64) (xaddr uintptr, err error)
94
95//sys	futimesat(dirfd int, path string, times *[2]Timeval) (err error)
96
97func Gettimeofday(tv *Timeval) (err error) {
98	errno := gettimeofday(tv)
99	if errno != 0 {
100		return errno
101	}
102	return nil
103}
104
105func Time(t *Time_t) (tt Time_t, err error) {
106	var tv Timeval
107	errno := gettimeofday(&tv)
108	if errno != 0 {
109		return 0, errno
110	}
111	if t != nil {
112		*t = Time_t(tv.Sec)
113	}
114	return Time_t(tv.Sec), nil
115}
116
117//sys	Utime(path string, buf *Utimbuf) (err error)
118//sys	utimes(path string, times *[2]Timeval) (err error)
119
120func setTimespec(sec, nsec int64) Timespec {
121	return Timespec{Sec: sec, Nsec: nsec}
122}
123
124func setTimeval(sec, usec int64) Timeval {
125	return Timeval{Sec: sec, Usec: usec}
126}
127
128//sysnb	pipe(p *[2]_C_int) (err error)
129
130func Pipe(p []int) (err error) {
131	if len(p) != 2 {
132		return EINVAL
133	}
134	var pp [2]_C_int
135	err = pipe(&pp)
136	p[0] = int(pp[0])
137	p[1] = int(pp[1])
138	return
139}
140
141//sysnb pipe2(p *[2]_C_int, flags int) (err error)
142
143func Pipe2(p []int, flags int) (err error) {
144	if len(p) != 2 {
145		return EINVAL
146	}
147	var pp [2]_C_int
148	err = pipe2(&pp, flags)
149	p[0] = int(pp[0])
150	p[1] = int(pp[1])
151	return
152}
153
154func (r *PtraceRegs) PC() uint64 { return r.Rip }
155
156func (r *PtraceRegs) SetPC(pc uint64) { r.Rip = pc }
157
158func (iov *Iovec) SetLen(length int) {
159	iov.Len = uint64(length)
160}
161
162func (msghdr *Msghdr) SetControllen(length int) {
163	msghdr.Controllen = uint64(length)
164}
165
166func (msghdr *Msghdr) SetIovlen(length int) {
167	msghdr.Iovlen = uint64(length)
168}
169
170func (cmsg *Cmsghdr) SetLen(length int) {
171	cmsg.Len = uint64(length)
172}
173
174//sys	poll(fds *PollFd, nfds int, timeout int) (n int, err error)
175
176func Poll(fds []PollFd, timeout int) (n int, err error) {
177	if len(fds) == 0 {
178		return poll(nil, 0, timeout)
179	}
180	return poll(&fds[0], len(fds), timeout)
181}
182
183//sys	kexecFileLoad(kernelFd int, initrdFd int, cmdlineLen int, cmdline string, flags int) (err error)
184
185func KexecFileLoad(kernelFd int, initrdFd int, cmdline string, flags int) error {
186	cmdlineLen := len(cmdline)
187	if cmdlineLen > 0 {
188		// Account for the additional NULL byte added by
189		// BytePtrFromString in kexecFileLoad. The kexec_file_load
190		// syscall expects a NULL-terminated string.
191		cmdlineLen++
192	}
193	return kexecFileLoad(kernelFd, initrdFd, cmdlineLen, cmdline, flags)
194}
195