a geicko-2 based round robin ranking system designed to test c++ battleship submissions
battleship.dunkirk.sh
dunkirk.sh
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// FreeBSD 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 "errors"
17 "sync"
18 "unsafe"
19)
20
21// See https://www.freebsd.org/doc/en_US.ISO8859-1/books/porters-handbook/versions.html.
22var (
23 osreldateOnce sync.Once
24 osreldate uint32
25)
26
27func supportsABI(ver uint32) bool {
28 osreldateOnce.Do(func() { osreldate, _ = SysctlUint32("kern.osreldate") })
29 return osreldate >= ver
30}
31
32// SockaddrDatalink implements the Sockaddr interface for AF_LINK type sockets.
33type SockaddrDatalink struct {
34 Len uint8
35 Family uint8
36 Index uint16
37 Type uint8
38 Nlen uint8
39 Alen uint8
40 Slen uint8
41 Data [46]int8
42 raw RawSockaddrDatalink
43}
44
45func anyToSockaddrGOOS(fd int, rsa *RawSockaddrAny) (Sockaddr, error) {
46 return nil, EAFNOSUPPORT
47}
48
49// Translate "kern.hostname" to []_C_int{0,1,2,3}.
50func nametomib(name string) (mib []_C_int, err error) {
51 const siz = unsafe.Sizeof(mib[0])
52
53 // NOTE(rsc): It seems strange to set the buffer to have
54 // size CTL_MAXNAME+2 but use only CTL_MAXNAME
55 // as the size. I don't know why the +2 is here, but the
56 // kernel uses +2 for its own implementation of this function.
57 // I am scared that if we don't include the +2 here, the kernel
58 // will silently write 2 words farther than we specify
59 // and we'll get memory corruption.
60 var buf [CTL_MAXNAME + 2]_C_int
61 n := uintptr(CTL_MAXNAME) * siz
62
63 p := (*byte)(unsafe.Pointer(&buf[0]))
64 bytes, err := ByteSliceFromString(name)
65 if err != nil {
66 return nil, err
67 }
68
69 // Magic sysctl: "setting" 0.3 to a string name
70 // lets you read back the array of integers form.
71 if err = sysctl([]_C_int{0, 3}, p, &n, &bytes[0], uintptr(len(name))); err != nil {
72 return nil, err
73 }
74 return buf[0 : n/siz], nil
75}
76
77func direntIno(buf []byte) (uint64, bool) {
78 return readInt(buf, unsafe.Offsetof(Dirent{}.Fileno), unsafe.Sizeof(Dirent{}.Fileno))
79}
80
81func direntReclen(buf []byte) (uint64, bool) {
82 return readInt(buf, unsafe.Offsetof(Dirent{}.Reclen), unsafe.Sizeof(Dirent{}.Reclen))
83}
84
85func direntNamlen(buf []byte) (uint64, bool) {
86 return readInt(buf, unsafe.Offsetof(Dirent{}.Namlen), unsafe.Sizeof(Dirent{}.Namlen))
87}
88
89func Pipe(p []int) (err error) {
90 return Pipe2(p, 0)
91}
92
93//sysnb pipe2(p *[2]_C_int, flags int) (err error)
94
95func Pipe2(p []int, flags int) error {
96 if len(p) != 2 {
97 return EINVAL
98 }
99 var pp [2]_C_int
100 err := pipe2(&pp, flags)
101 if err == nil {
102 p[0] = int(pp[0])
103 p[1] = int(pp[1])
104 }
105 return err
106}
107
108func GetsockoptIPMreqn(fd, level, opt int) (*IPMreqn, error) {
109 var value IPMreqn
110 vallen := _Socklen(SizeofIPMreqn)
111 errno := getsockopt(fd, level, opt, unsafe.Pointer(&value), &vallen)
112 return &value, errno
113}
114
115func SetsockoptIPMreqn(fd, level, opt int, mreq *IPMreqn) (err error) {
116 return setsockopt(fd, level, opt, unsafe.Pointer(mreq), unsafe.Sizeof(*mreq))
117}
118
119// GetsockoptXucred is a getsockopt wrapper that returns an Xucred struct.
120// The usual level and opt are SOL_LOCAL and LOCAL_PEERCRED, respectively.
121func GetsockoptXucred(fd, level, opt int) (*Xucred, error) {
122 x := new(Xucred)
123 vallen := _Socklen(SizeofXucred)
124 err := getsockopt(fd, level, opt, unsafe.Pointer(x), &vallen)
125 return x, err
126}
127
128func Accept4(fd, flags int) (nfd int, sa Sockaddr, err error) {
129 var rsa RawSockaddrAny
130 var len _Socklen = SizeofSockaddrAny
131 nfd, err = accept4(fd, &rsa, &len, flags)
132 if err != nil {
133 return
134 }
135 if len > SizeofSockaddrAny {
136 panic("RawSockaddrAny too small")
137 }
138 sa, err = anyToSockaddr(fd, &rsa)
139 if err != nil {
140 Close(nfd)
141 nfd = 0
142 }
143 return
144}
145
146//sys Getcwd(buf []byte) (n int, err error) = SYS___GETCWD
147
148func Getfsstat(buf []Statfs_t, flags int) (n int, err error) {
149 var (
150 _p0 unsafe.Pointer
151 bufsize uintptr
152 )
153 if len(buf) > 0 {
154 _p0 = unsafe.Pointer(&buf[0])
155 bufsize = unsafe.Sizeof(Statfs_t{}) * uintptr(len(buf))
156 }
157 r0, _, e1 := Syscall(SYS_GETFSSTAT, uintptr(_p0), bufsize, uintptr(flags))
158 n = int(r0)
159 if e1 != 0 {
160 err = e1
161 }
162 return
163}
164
165//sys ioctl(fd int, req uint, arg uintptr) (err error) = SYS_IOCTL
166//sys ioctlPtr(fd int, req uint, arg unsafe.Pointer) (err error) = SYS_IOCTL
167
168//sys sysctl(mib []_C_int, old *byte, oldlen *uintptr, new *byte, newlen uintptr) (err error) = SYS___SYSCTL
169
170func Uname(uname *Utsname) error {
171 mib := []_C_int{CTL_KERN, KERN_OSTYPE}
172 n := unsafe.Sizeof(uname.Sysname)
173 // Suppress ENOMEM errors to be compatible with the C library __xuname() implementation.
174 if err := sysctl(mib, &uname.Sysname[0], &n, nil, 0); err != nil && !errors.Is(err, ENOMEM) {
175 return err
176 }
177
178 mib = []_C_int{CTL_KERN, KERN_HOSTNAME}
179 n = unsafe.Sizeof(uname.Nodename)
180 if err := sysctl(mib, &uname.Nodename[0], &n, nil, 0); err != nil && !errors.Is(err, ENOMEM) {
181 return err
182 }
183
184 mib = []_C_int{CTL_KERN, KERN_OSRELEASE}
185 n = unsafe.Sizeof(uname.Release)
186 if err := sysctl(mib, &uname.Release[0], &n, nil, 0); err != nil && !errors.Is(err, ENOMEM) {
187 return err
188 }
189
190 mib = []_C_int{CTL_KERN, KERN_VERSION}
191 n = unsafe.Sizeof(uname.Version)
192 if err := sysctl(mib, &uname.Version[0], &n, nil, 0); err != nil && !errors.Is(err, ENOMEM) {
193 return err
194 }
195
196 // The version might have newlines or tabs in it, convert them to
197 // spaces.
198 for i, b := range uname.Version {
199 if b == '\n' || b == '\t' {
200 if i == len(uname.Version)-1 {
201 uname.Version[i] = 0
202 } else {
203 uname.Version[i] = ' '
204 }
205 }
206 }
207
208 mib = []_C_int{CTL_HW, HW_MACHINE}
209 n = unsafe.Sizeof(uname.Machine)
210 if err := sysctl(mib, &uname.Machine[0], &n, nil, 0); err != nil && !errors.Is(err, ENOMEM) {
211 return err
212 }
213
214 return nil
215}
216
217func Stat(path string, st *Stat_t) (err error) {
218 return Fstatat(AT_FDCWD, path, st, 0)
219}
220
221func Lstat(path string, st *Stat_t) (err error) {
222 return Fstatat(AT_FDCWD, path, st, AT_SYMLINK_NOFOLLOW)
223}
224
225func Getdents(fd int, buf []byte) (n int, err error) {
226 return Getdirentries(fd, buf, nil)
227}
228
229func Getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error) {
230 if basep == nil || unsafe.Sizeof(*basep) == 8 {
231 return getdirentries(fd, buf, (*uint64)(unsafe.Pointer(basep)))
232 }
233 // The syscall needs a 64-bit base. On 32-bit machines
234 // we can't just use the basep passed in. See #32498.
235 var base uint64 = uint64(*basep)
236 n, err = getdirentries(fd, buf, &base)
237 *basep = uintptr(base)
238 if base>>32 != 0 {
239 // We can't stuff the base back into a uintptr, so any
240 // future calls would be suspect. Generate an error.
241 // EIO is allowed by getdirentries.
242 err = EIO
243 }
244 return
245}
246
247func Mknod(path string, mode uint32, dev uint64) (err error) {
248 return Mknodat(AT_FDCWD, path, mode, dev)
249}
250
251func Sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) {
252 if raceenabled {
253 raceReleaseMerge(unsafe.Pointer(&ioSync))
254 }
255 return sendfile(outfd, infd, offset, count)
256}
257
258//sys ptrace(request int, pid int, addr uintptr, data int) (err error)
259//sys ptracePtr(request int, pid int, addr unsafe.Pointer, data int) (err error) = SYS_PTRACE
260
261func PtraceAttach(pid int) (err error) {
262 return ptrace(PT_ATTACH, pid, 0, 0)
263}
264
265func PtraceCont(pid int, signal int) (err error) {
266 return ptrace(PT_CONTINUE, pid, 1, signal)
267}
268
269func PtraceDetach(pid int) (err error) {
270 return ptrace(PT_DETACH, pid, 1, 0)
271}
272
273func PtraceGetFpRegs(pid int, fpregsout *FpReg) (err error) {
274 return ptracePtr(PT_GETFPREGS, pid, unsafe.Pointer(fpregsout), 0)
275}
276
277func PtraceGetRegs(pid int, regsout *Reg) (err error) {
278 return ptracePtr(PT_GETREGS, pid, unsafe.Pointer(regsout), 0)
279}
280
281func PtraceIO(req int, pid int, offs uintptr, out []byte, countin int) (count int, err error) {
282 ioDesc := PtraceIoDesc{
283 Op: int32(req),
284 Offs: offs,
285 }
286 if countin > 0 {
287 _ = out[:countin] // check bounds
288 ioDesc.Addr = &out[0]
289 } else if out != nil {
290 ioDesc.Addr = (*byte)(unsafe.Pointer(&_zero))
291 }
292 ioDesc.SetLen(countin)
293
294 err = ptracePtr(PT_IO, pid, unsafe.Pointer(&ioDesc), 0)
295 return int(ioDesc.Len), err
296}
297
298func PtraceLwpEvents(pid int, enable int) (err error) {
299 return ptrace(PT_LWP_EVENTS, pid, 0, enable)
300}
301
302func PtraceLwpInfo(pid int, info *PtraceLwpInfoStruct) (err error) {
303 return ptracePtr(PT_LWPINFO, pid, unsafe.Pointer(info), int(unsafe.Sizeof(*info)))
304}
305
306func PtracePeekData(pid int, addr uintptr, out []byte) (count int, err error) {
307 return PtraceIO(PIOD_READ_D, pid, addr, out, SizeofLong)
308}
309
310func PtracePeekText(pid int, addr uintptr, out []byte) (count int, err error) {
311 return PtraceIO(PIOD_READ_I, pid, addr, out, SizeofLong)
312}
313
314func PtracePokeData(pid int, addr uintptr, data []byte) (count int, err error) {
315 return PtraceIO(PIOD_WRITE_D, pid, addr, data, SizeofLong)
316}
317
318func PtracePokeText(pid int, addr uintptr, data []byte) (count int, err error) {
319 return PtraceIO(PIOD_WRITE_I, pid, addr, data, SizeofLong)
320}
321
322func PtraceSetRegs(pid int, regs *Reg) (err error) {
323 return ptracePtr(PT_SETREGS, pid, unsafe.Pointer(regs), 0)
324}
325
326func PtraceSingleStep(pid int) (err error) {
327 return ptrace(PT_STEP, pid, 1, 0)
328}
329
330func Dup3(oldfd, newfd, flags int) error {
331 if oldfd == newfd || flags&^O_CLOEXEC != 0 {
332 return EINVAL
333 }
334 how := F_DUP2FD
335 if flags&O_CLOEXEC != 0 {
336 how = F_DUP2FD_CLOEXEC
337 }
338 _, err := fcntl(oldfd, how, newfd)
339 return err
340}
341
342/*
343 * Exposed directly
344 */
345//sys Access(path string, mode uint32) (err error)
346//sys Adjtime(delta *Timeval, olddelta *Timeval) (err error)
347//sys CapEnter() (err error)
348//sys capRightsGet(version int, fd int, rightsp *CapRights) (err error) = SYS___CAP_RIGHTS_GET
349//sys capRightsLimit(fd int, rightsp *CapRights) (err error)
350//sys Chdir(path string) (err error)
351//sys Chflags(path string, flags int) (err error)
352//sys Chmod(path string, mode uint32) (err error)
353//sys Chown(path string, uid int, gid int) (err error)
354//sys Chroot(path string) (err error)
355//sys ClockGettime(clockid int32, time *Timespec) (err error)
356//sys Close(fd int) (err error)
357//sys Dup(fd int) (nfd int, err error)
358//sys Dup2(from int, to int) (err error)
359//sys Exit(code int)
360//sys ExtattrGetFd(fd int, attrnamespace int, attrname string, data uintptr, nbytes int) (ret int, err error)
361//sys ExtattrSetFd(fd int, attrnamespace int, attrname string, data uintptr, nbytes int) (ret int, err error)
362//sys ExtattrDeleteFd(fd int, attrnamespace int, attrname string) (err error)
363//sys ExtattrListFd(fd int, attrnamespace int, data uintptr, nbytes int) (ret int, err error)
364//sys ExtattrGetFile(file string, attrnamespace int, attrname string, data uintptr, nbytes int) (ret int, err error)
365//sys ExtattrSetFile(file string, attrnamespace int, attrname string, data uintptr, nbytes int) (ret int, err error)
366//sys ExtattrDeleteFile(file string, attrnamespace int, attrname string) (err error)
367//sys ExtattrListFile(file string, attrnamespace int, data uintptr, nbytes int) (ret int, err error)
368//sys ExtattrGetLink(link string, attrnamespace int, attrname string, data uintptr, nbytes int) (ret int, err error)
369//sys ExtattrSetLink(link string, attrnamespace int, attrname string, data uintptr, nbytes int) (ret int, err error)
370//sys ExtattrDeleteLink(link string, attrnamespace int, attrname string) (err error)
371//sys ExtattrListLink(link string, attrnamespace int, data uintptr, nbytes int) (ret int, err error)
372//sys Fadvise(fd int, offset int64, length int64, advice int) (err error) = SYS_POSIX_FADVISE
373//sys Faccessat(dirfd int, path string, mode uint32, flags int) (err error)
374//sys Fchdir(fd int) (err error)
375//sys Fchflags(fd int, flags int) (err error)
376//sys Fchmod(fd int, mode uint32) (err error)
377//sys Fchmodat(dirfd int, path string, mode uint32, flags int) (err error)
378//sys Fchown(fd int, uid int, gid int) (err error)
379//sys Fchownat(dirfd int, path string, uid int, gid int, flags int) (err error)
380//sys Flock(fd int, how int) (err error)
381//sys Fpathconf(fd int, name int) (val int, err error)
382//sys Fstat(fd int, stat *Stat_t) (err error)
383//sys Fstatat(fd int, path string, stat *Stat_t, flags int) (err error)
384//sys Fstatfs(fd int, stat *Statfs_t) (err error)
385//sys Fsync(fd int) (err error)
386//sys Ftruncate(fd int, length int64) (err error)
387//sys getdirentries(fd int, buf []byte, basep *uint64) (n int, err error)
388//sys Getdtablesize() (size int)
389//sysnb Getegid() (egid int)
390//sysnb Geteuid() (uid int)
391//sysnb Getgid() (gid int)
392//sysnb Getpgid(pid int) (pgid int, err error)
393//sysnb Getpgrp() (pgrp int)
394//sysnb Getpid() (pid int)
395//sysnb Getppid() (ppid int)
396//sys Getpriority(which int, who int) (prio int, err error)
397//sysnb Getrlimit(which int, lim *Rlimit) (err error)
398//sysnb Getrusage(who int, rusage *Rusage) (err error)
399//sysnb Getsid(pid int) (sid int, err error)
400//sysnb Gettimeofday(tv *Timeval) (err error)
401//sysnb Getuid() (uid int)
402//sys Issetugid() (tainted bool)
403//sys Kill(pid int, signum syscall.Signal) (err error)
404//sys Kqueue() (fd int, err error)
405//sys Lchown(path string, uid int, gid int) (err error)
406//sys Link(path string, link string) (err error)
407//sys Linkat(pathfd int, path string, linkfd int, link string, flags int) (err error)
408//sys Listen(s int, backlog int) (err error)
409//sys Mkdir(path string, mode uint32) (err error)
410//sys Mkdirat(dirfd int, path string, mode uint32) (err error)
411//sys Mkfifo(path string, mode uint32) (err error)
412//sys Mknodat(fd int, path string, mode uint32, dev uint64) (err error)
413//sys Nanosleep(time *Timespec, leftover *Timespec) (err error)
414//sys Open(path string, mode int, perm uint32) (fd int, err error)
415//sys Openat(fdat int, path string, mode int, perm uint32) (fd int, err error)
416//sys Pathconf(path string, name int) (val int, err error)
417//sys pread(fd int, p []byte, offset int64) (n int, err error)
418//sys pwrite(fd int, p []byte, offset int64) (n int, err error)
419//sys read(fd int, p []byte) (n int, err error)
420//sys Readlink(path string, buf []byte) (n int, err error)
421//sys Readlinkat(dirfd int, path string, buf []byte) (n int, err error)
422//sys Rename(from string, to string) (err error)
423//sys Renameat(fromfd int, from string, tofd int, to string) (err error)
424//sys Revoke(path string) (err error)
425//sys Rmdir(path string) (err error)
426//sys Seek(fd int, offset int64, whence int) (newoffset int64, err error) = SYS_LSEEK
427//sys Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error)
428//sysnb Setegid(egid int) (err error)
429//sysnb Seteuid(euid int) (err error)
430//sysnb Setgid(gid int) (err error)
431//sys Setlogin(name string) (err error)
432//sysnb Setpgid(pid int, pgid int) (err error)
433//sys Setpriority(which int, who int, prio int) (err error)
434//sysnb Setregid(rgid int, egid int) (err error)
435//sysnb Setreuid(ruid int, euid int) (err error)
436//sysnb Setresgid(rgid int, egid int, sgid int) (err error)
437//sysnb Setresuid(ruid int, euid int, suid int) (err error)
438//sysnb Setsid() (pid int, err error)
439//sysnb Settimeofday(tp *Timeval) (err error)
440//sysnb Setuid(uid int) (err error)
441//sys Statfs(path string, stat *Statfs_t) (err error)
442//sys Symlink(path string, link string) (err error)
443//sys Symlinkat(oldpath string, newdirfd int, newpath string) (err error)
444//sys Sync() (err error)
445//sys Truncate(path string, length int64) (err error)
446//sys Umask(newmask int) (oldmask int)
447//sys Undelete(path string) (err error)
448//sys Unlink(path string) (err error)
449//sys Unlinkat(dirfd int, path string, flags int) (err error)
450//sys Unmount(path string, flags int) (err error)
451//sys write(fd int, p []byte) (n int, err error)
452//sys mmap(addr uintptr, length uintptr, prot int, flag int, fd int, pos int64) (ret uintptr, err error)
453//sys munmap(addr uintptr, length uintptr) (err error)
454//sys accept4(fd int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (nfd int, err error)
455//sys utimensat(dirfd int, path string, times *[2]Timespec, flags int) (err error)