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// TODO(rsc): Rewrite all nn(SP) references into name+(nn-8)(FP)
6// so that go vet can check that they are correct.
7
8// +build 386,linux
9
10package unix
11
12import (
13 "unsafe"
14)
15
16func setTimespec(sec, nsec int64) Timespec {
17 return Timespec{Sec: int32(sec), Nsec: int32(nsec)}
18}
19
20func setTimeval(sec, usec int64) Timeval {
21 return Timeval{Sec: int32(sec), Usec: int32(usec)}
22}
23
24//sysnb pipe(p *[2]_C_int) (err error)
25
26func Pipe(p []int) (err error) {
27 if len(p) != 2 {
28 return EINVAL
29 }
30 var pp [2]_C_int
31 err = pipe(&pp)
32 p[0] = int(pp[0])
33 p[1] = int(pp[1])
34 return
35}
36
37//sysnb pipe2(p *[2]_C_int, flags int) (err error)
38
39func Pipe2(p []int, flags int) (err error) {
40 if len(p) != 2 {
41 return EINVAL
42 }
43 var pp [2]_C_int
44 err = pipe2(&pp, flags)
45 p[0] = int(pp[0])
46 p[1] = int(pp[1])
47 return
48}
49
50// 64-bit file system and 32-bit uid calls
51// (386 default is 32-bit file system and 16-bit uid).
52//sys Dup2(oldfd int, newfd int) (err error)
53//sysnb EpollCreate(size int) (fd int, err error)
54//sys EpollWait(epfd int, events []EpollEvent, msec int) (n int, err error)
55//sys Fadvise(fd int, offset int64, length int64, advice int) (err error) = SYS_FADVISE64_64
56//sys Fchown(fd int, uid int, gid int) (err error) = SYS_FCHOWN32
57//sys Fstat(fd int, stat *Stat_t) (err error) = SYS_FSTAT64
58//sys Fstatat(dirfd int, path string, stat *Stat_t, flags int) (err error) = SYS_FSTATAT64
59//sys Ftruncate(fd int, length int64) (err error) = SYS_FTRUNCATE64
60//sysnb Getegid() (egid int) = SYS_GETEGID32
61//sysnb Geteuid() (euid int) = SYS_GETEUID32
62//sysnb Getgid() (gid int) = SYS_GETGID32
63//sysnb Getuid() (uid int) = SYS_GETUID32
64//sysnb InotifyInit() (fd int, err error)
65//sys Ioperm(from int, num int, on int) (err error)
66//sys Iopl(level int) (err error)
67//sys Lchown(path string, uid int, gid int) (err error) = SYS_LCHOWN32
68//sys Lstat(path string, stat *Stat_t) (err error) = SYS_LSTAT64
69//sys Pread(fd int, p []byte, offset int64) (n int, err error) = SYS_PREAD64
70//sys Pwrite(fd int, p []byte, offset int64) (n int, err error) = SYS_PWRITE64
71//sys sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) = SYS_SENDFILE64
72//sys Setfsgid(gid int) (err error) = SYS_SETFSGID32
73//sys Setfsuid(uid int) (err error) = SYS_SETFSUID32
74//sysnb Setregid(rgid int, egid int) (err error) = SYS_SETREGID32
75//sysnb Setresgid(rgid int, egid int, sgid int) (err error) = SYS_SETRESGID32
76//sysnb Setresuid(ruid int, euid int, suid int) (err error) = SYS_SETRESUID32
77//sysnb Setreuid(ruid int, euid int) (err error) = SYS_SETREUID32
78//sys Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int, err error)
79//sys Stat(path string, stat *Stat_t) (err error) = SYS_STAT64
80//sys SyncFileRange(fd int, off int64, n int64, flags int) (err error)
81//sys Truncate(path string, length int64) (err error) = SYS_TRUNCATE64
82//sys Ustat(dev int, ubuf *Ustat_t) (err error)
83//sysnb getgroups(n int, list *_Gid_t) (nn int, err error) = SYS_GETGROUPS32
84//sysnb setgroups(n int, list *_Gid_t) (err error) = SYS_SETGROUPS32
85//sys Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error) = SYS__NEWSELECT
86
87//sys mmap2(addr uintptr, length uintptr, prot int, flags int, fd int, pageOffset uintptr) (xaddr uintptr, err error)
88//sys Pause() (err error)
89
90func mmap(addr uintptr, length uintptr, prot int, flags int, fd int, offset int64) (xaddr uintptr, err error) {
91 page := uintptr(offset / 4096)
92 if offset != int64(page)*4096 {
93 return 0, EINVAL
94 }
95 return mmap2(addr, length, prot, flags, fd, page)
96}
97
98type rlimit32 struct {
99 Cur uint32
100 Max uint32
101}
102
103//sysnb getrlimit(resource int, rlim *rlimit32) (err error) = SYS_GETRLIMIT
104
105const rlimInf32 = ^uint32(0)
106const rlimInf64 = ^uint64(0)
107
108func Getrlimit(resource int, rlim *Rlimit) (err error) {
109 err = prlimit(0, resource, nil, rlim)
110 if err != ENOSYS {
111 return err
112 }
113
114 rl := rlimit32{}
115 err = getrlimit(resource, &rl)
116 if err != nil {
117 return
118 }
119
120 if rl.Cur == rlimInf32 {
121 rlim.Cur = rlimInf64
122 } else {
123 rlim.Cur = uint64(rl.Cur)
124 }
125
126 if rl.Max == rlimInf32 {
127 rlim.Max = rlimInf64
128 } else {
129 rlim.Max = uint64(rl.Max)
130 }
131 return
132}
133
134//sysnb setrlimit(resource int, rlim *rlimit32) (err error) = SYS_SETRLIMIT
135
136func Setrlimit(resource int, rlim *Rlimit) (err error) {
137 err = prlimit(0, resource, rlim, nil)
138 if err != ENOSYS {
139 return err
140 }
141
142 rl := rlimit32{}
143 if rlim.Cur == rlimInf64 {
144 rl.Cur = rlimInf32
145 } else if rlim.Cur < uint64(rlimInf32) {
146 rl.Cur = uint32(rlim.Cur)
147 } else {
148 return EINVAL
149 }
150 if rlim.Max == rlimInf64 {
151 rl.Max = rlimInf32
152 } else if rlim.Max < uint64(rlimInf32) {
153 rl.Max = uint32(rlim.Max)
154 } else {
155 return EINVAL
156 }
157
158 return setrlimit(resource, &rl)
159}
160
161func Seek(fd int, offset int64, whence int) (newoffset int64, err error) {
162 newoffset, errno := seek(fd, offset, whence)
163 if errno != 0 {
164 return 0, errno
165 }
166 return newoffset, nil
167}
168
169//sys futimesat(dirfd int, path string, times *[2]Timeval) (err error)
170//sysnb Gettimeofday(tv *Timeval) (err error)
171//sysnb Time(t *Time_t) (tt Time_t, err error)
172//sys Utime(path string, buf *Utimbuf) (err error)
173//sys utimes(path string, times *[2]Timeval) (err error)
174
175// On x86 Linux, all the socket calls go through an extra indirection,
176// I think because the 5-register system call interface can't handle
177// the 6-argument calls like sendto and recvfrom. Instead the
178// arguments to the underlying system call are the number below
179// and a pointer to an array of uintptr. We hide the pointer in the
180// socketcall assembly to avoid allocation on every system call.
181
182const (
183 // see linux/net.h
184 _SOCKET = 1
185 _BIND = 2
186 _CONNECT = 3
187 _LISTEN = 4
188 _ACCEPT = 5
189 _GETSOCKNAME = 6
190 _GETPEERNAME = 7
191 _SOCKETPAIR = 8
192 _SEND = 9
193 _RECV = 10
194 _SENDTO = 11
195 _RECVFROM = 12
196 _SHUTDOWN = 13
197 _SETSOCKOPT = 14
198 _GETSOCKOPT = 15
199 _SENDMSG = 16
200 _RECVMSG = 17
201 _ACCEPT4 = 18
202 _RECVMMSG = 19
203 _SENDMMSG = 20
204)
205
206func accept(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (fd int, err error) {
207 fd, e := socketcall(_ACCEPT, uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)), 0, 0, 0)
208 if e != 0 {
209 err = e
210 }
211 return
212}
213
214func accept4(s int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (fd int, err error) {
215 fd, e := socketcall(_ACCEPT4, uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)), uintptr(flags), 0, 0)
216 if e != 0 {
217 err = e
218 }
219 return
220}
221
222func getsockname(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) {
223 _, e := rawsocketcall(_GETSOCKNAME, uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)), 0, 0, 0)
224 if e != 0 {
225 err = e
226 }
227 return
228}
229
230func getpeername(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) {
231 _, e := rawsocketcall(_GETPEERNAME, uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)), 0, 0, 0)
232 if e != 0 {
233 err = e
234 }
235 return
236}
237
238func socketpair(domain int, typ int, flags int, fd *[2]int32) (err error) {
239 _, e := rawsocketcall(_SOCKETPAIR, uintptr(domain), uintptr(typ), uintptr(flags), uintptr(unsafe.Pointer(fd)), 0, 0)
240 if e != 0 {
241 err = e
242 }
243 return
244}
245
246func bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) {
247 _, e := socketcall(_BIND, uintptr(s), uintptr(addr), uintptr(addrlen), 0, 0, 0)
248 if e != 0 {
249 err = e
250 }
251 return
252}
253
254func connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) {
255 _, e := socketcall(_CONNECT, uintptr(s), uintptr(addr), uintptr(addrlen), 0, 0, 0)
256 if e != 0 {
257 err = e
258 }
259 return
260}
261
262func socket(domain int, typ int, proto int) (fd int, err error) {
263 fd, e := rawsocketcall(_SOCKET, uintptr(domain), uintptr(typ), uintptr(proto), 0, 0, 0)
264 if e != 0 {
265 err = e
266 }
267 return
268}
269
270func getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error) {
271 _, e := socketcall(_GETSOCKOPT, uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(unsafe.Pointer(vallen)), 0)
272 if e != 0 {
273 err = e
274 }
275 return
276}
277
278func setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error) {
279 _, e := socketcall(_SETSOCKOPT, uintptr(s), uintptr(level), uintptr(name), uintptr(val), vallen, 0)
280 if e != 0 {
281 err = e
282 }
283 return
284}
285
286func recvfrom(s int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (n int, err error) {
287 var base uintptr
288 if len(p) > 0 {
289 base = uintptr(unsafe.Pointer(&p[0]))
290 }
291 n, e := socketcall(_RECVFROM, uintptr(s), base, uintptr(len(p)), uintptr(flags), uintptr(unsafe.Pointer(from)), uintptr(unsafe.Pointer(fromlen)))
292 if e != 0 {
293 err = e
294 }
295 return
296}
297
298func sendto(s int, p []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (err error) {
299 var base uintptr
300 if len(p) > 0 {
301 base = uintptr(unsafe.Pointer(&p[0]))
302 }
303 _, e := socketcall(_SENDTO, uintptr(s), base, uintptr(len(p)), uintptr(flags), uintptr(to), uintptr(addrlen))
304 if e != 0 {
305 err = e
306 }
307 return
308}
309
310func recvmsg(s int, msg *Msghdr, flags int) (n int, err error) {
311 n, e := socketcall(_RECVMSG, uintptr(s), uintptr(unsafe.Pointer(msg)), uintptr(flags), 0, 0, 0)
312 if e != 0 {
313 err = e
314 }
315 return
316}
317
318func sendmsg(s int, msg *Msghdr, flags int) (n int, err error) {
319 n, e := socketcall(_SENDMSG, uintptr(s), uintptr(unsafe.Pointer(msg)), uintptr(flags), 0, 0, 0)
320 if e != 0 {
321 err = e
322 }
323 return
324}
325
326func Listen(s int, n int) (err error) {
327 _, e := socketcall(_LISTEN, uintptr(s), uintptr(n), 0, 0, 0, 0)
328 if e != 0 {
329 err = e
330 }
331 return
332}
333
334func Shutdown(s, how int) (err error) {
335 _, e := socketcall(_SHUTDOWN, uintptr(s), uintptr(how), 0, 0, 0, 0)
336 if e != 0 {
337 err = e
338 }
339 return
340}
341
342func Fstatfs(fd int, buf *Statfs_t) (err error) {
343 _, _, e := Syscall(SYS_FSTATFS64, uintptr(fd), unsafe.Sizeof(*buf), uintptr(unsafe.Pointer(buf)))
344 if e != 0 {
345 err = e
346 }
347 return
348}
349
350func Statfs(path string, buf *Statfs_t) (err error) {
351 pathp, err := BytePtrFromString(path)
352 if err != nil {
353 return err
354 }
355 _, _, e := Syscall(SYS_STATFS64, uintptr(unsafe.Pointer(pathp)), unsafe.Sizeof(*buf), uintptr(unsafe.Pointer(buf)))
356 if e != 0 {
357 err = e
358 }
359 return
360}
361
362func (r *PtraceRegs) PC() uint64 { return uint64(uint32(r.Eip)) }
363
364func (r *PtraceRegs) SetPC(pc uint64) { r.Eip = int32(pc) }
365
366func (iov *Iovec) SetLen(length int) {
367 iov.Len = uint32(length)
368}
369
370func (msghdr *Msghdr) SetControllen(length int) {
371 msghdr.Controllen = uint32(length)
372}
373
374func (cmsg *Cmsghdr) SetLen(length int) {
375 cmsg.Len = uint32(length)
376}
377
378//sys poll(fds *PollFd, nfds int, timeout int) (n int, err error)
379
380func Poll(fds []PollFd, timeout int) (n int, err error) {
381 if len(fds) == 0 {
382 return poll(nil, 0, timeout)
383 }
384 return poll(&fds[0], len(fds), timeout)
385}