syscall_dragonfly.go raw
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 // DragonFly BSD 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
13 package unix
14
15 import (
16 "sync"
17 "unsafe"
18 )
19
20 // See version list in https://github.com/DragonFlyBSD/DragonFlyBSD/blob/master/sys/sys/param.h
21 var (
22 osreldateOnce sync.Once
23 osreldate uint32
24 )
25
26 // First __DragonFly_version after September 2019 ABI changes
27 // http://lists.dragonflybsd.org/pipermail/users/2019-September/358280.html
28 const _dragonflyABIChangeVersion = 500705
29
30 func supportsABI(ver uint32) bool {
31 osreldateOnce.Do(func() { osreldate, _ = SysctlUint32("kern.osreldate") })
32 return osreldate >= ver
33 }
34
35 // SockaddrDatalink implements the Sockaddr interface for AF_LINK type sockets.
36 type SockaddrDatalink struct {
37 Len uint8
38 Family uint8
39 Index uint16
40 Type uint8
41 Nlen uint8
42 Alen uint8
43 Slen uint8
44 Data [12]int8
45 Rcf uint16
46 Route [16]uint16
47 raw RawSockaddrDatalink
48 }
49
50 func anyToSockaddrGOOS(fd int, rsa *RawSockaddrAny) (Sockaddr, error) {
51 return nil, EAFNOSUPPORT
52 }
53
54 // Translate "kern.hostname" to []_C_int{0,1,2,3}.
55 func nametomib(name string) (mib []_C_int, err error) {
56 const siz = unsafe.Sizeof(mib[0])
57
58 // NOTE(rsc): It seems strange to set the buffer to have
59 // size CTL_MAXNAME+2 but use only CTL_MAXNAME
60 // as the size. I don't know why the +2 is here, but the
61 // kernel uses +2 for its own implementation of this function.
62 // I am scared that if we don't include the +2 here, the kernel
63 // will silently write 2 words farther than we specify
64 // and we'll get memory corruption.
65 var buf [CTL_MAXNAME + 2]_C_int
66 n := uintptr(CTL_MAXNAME) * siz
67
68 p := (*byte)(unsafe.Pointer(&buf[0]))
69 bytes, err := ByteSliceFromString(name)
70 if err != nil {
71 return nil, err
72 }
73
74 // Magic sysctl: "setting" 0.3 to a string name
75 // lets you read back the array of integers form.
76 if err = sysctl([]_C_int{0, 3}, p, &n, &bytes[0], uintptr(len(name))); err != nil {
77 return nil, err
78 }
79 return buf[0 : n/siz], nil
80 }
81
82 func direntIno(buf []byte) (uint64, bool) {
83 return readInt(buf, unsafe.Offsetof(Dirent{}.Fileno), unsafe.Sizeof(Dirent{}.Fileno))
84 }
85
86 func direntReclen(buf []byte) (uint64, bool) {
87 namlen, ok := direntNamlen(buf)
88 if !ok {
89 return 0, false
90 }
91 return (16 + namlen + 1 + 7) &^ 7, true
92 }
93
94 func direntNamlen(buf []byte) (uint64, bool) {
95 return readInt(buf, unsafe.Offsetof(Dirent{}.Namlen), unsafe.Sizeof(Dirent{}.Namlen))
96 }
97
98 //sysnb pipe() (r int, w int, err error)
99
100 func Pipe(p []int) (err error) {
101 if len(p) != 2 {
102 return EINVAL
103 }
104 r, w, err := pipe()
105 if err == nil {
106 p[0], p[1] = r, w
107 }
108 return
109 }
110
111 //sysnb pipe2(p *[2]_C_int, flags int) (r int, w int, err error)
112
113 func Pipe2(p []int, flags int) (err error) {
114 if len(p) != 2 {
115 return EINVAL
116 }
117 var pp [2]_C_int
118 // pipe2 on dragonfly takes an fds array as an argument, but still
119 // returns the file descriptors.
120 r, w, err := pipe2(&pp, flags)
121 if err == nil {
122 p[0], p[1] = r, w
123 }
124 return err
125 }
126
127 //sys extpread(fd int, p []byte, flags int, offset int64) (n int, err error)
128
129 func pread(fd int, p []byte, offset int64) (n int, err error) {
130 return extpread(fd, p, 0, offset)
131 }
132
133 //sys extpwrite(fd int, p []byte, flags int, offset int64) (n int, err error)
134
135 func pwrite(fd int, p []byte, offset int64) (n int, err error) {
136 return extpwrite(fd, p, 0, offset)
137 }
138
139 func Accept4(fd, flags int) (nfd int, sa Sockaddr, err error) {
140 var rsa RawSockaddrAny
141 var len _Socklen = SizeofSockaddrAny
142 nfd, err = accept4(fd, &rsa, &len, flags)
143 if err != nil {
144 return
145 }
146 if len > SizeofSockaddrAny {
147 panic("RawSockaddrAny too small")
148 }
149 sa, err = anyToSockaddr(fd, &rsa)
150 if err != nil {
151 Close(nfd)
152 nfd = 0
153 }
154 return
155 }
156
157 //sys Getcwd(buf []byte) (n int, err error) = SYS___GETCWD
158
159 func 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
174 //sys ioctl(fd int, req uint, arg uintptr) (err error)
175 //sys ioctlPtr(fd int, req uint, arg unsafe.Pointer) (err error) = SYS_IOCTL
176
177 //sys sysctl(mib []_C_int, old *byte, oldlen *uintptr, new *byte, newlen uintptr) (err error) = SYS___SYSCTL
178
179 func sysctlUname(mib []_C_int, old *byte, oldlen *uintptr) error {
180 err := sysctl(mib, old, oldlen, nil, 0)
181 if err != nil {
182 // Utsname members on Dragonfly are only 32 bytes and
183 // the syscall returns ENOMEM in case the actual value
184 // is longer.
185 if err == ENOMEM {
186 err = nil
187 }
188 }
189 return err
190 }
191
192 func Uname(uname *Utsname) error {
193 mib := []_C_int{CTL_KERN, KERN_OSTYPE}
194 n := unsafe.Sizeof(uname.Sysname)
195 if err := sysctlUname(mib, &uname.Sysname[0], &n); err != nil {
196 return err
197 }
198 uname.Sysname[unsafe.Sizeof(uname.Sysname)-1] = 0
199
200 mib = []_C_int{CTL_KERN, KERN_HOSTNAME}
201 n = unsafe.Sizeof(uname.Nodename)
202 if err := sysctlUname(mib, &uname.Nodename[0], &n); err != nil {
203 return err
204 }
205 uname.Nodename[unsafe.Sizeof(uname.Nodename)-1] = 0
206
207 mib = []_C_int{CTL_KERN, KERN_OSRELEASE}
208 n = unsafe.Sizeof(uname.Release)
209 if err := sysctlUname(mib, &uname.Release[0], &n); err != nil {
210 return err
211 }
212 uname.Release[unsafe.Sizeof(uname.Release)-1] = 0
213
214 mib = []_C_int{CTL_KERN, KERN_VERSION}
215 n = unsafe.Sizeof(uname.Version)
216 if err := sysctlUname(mib, &uname.Version[0], &n); err != nil {
217 return err
218 }
219
220 // The version might have newlines or tabs in it, convert them to
221 // spaces.
222 for i, b := range uname.Version {
223 if b == '\n' || b == '\t' {
224 if i == len(uname.Version)-1 {
225 uname.Version[i] = 0
226 } else {
227 uname.Version[i] = ' '
228 }
229 }
230 }
231
232 mib = []_C_int{CTL_HW, HW_MACHINE}
233 n = unsafe.Sizeof(uname.Machine)
234 if err := sysctlUname(mib, &uname.Machine[0], &n); err != nil {
235 return err
236 }
237 uname.Machine[unsafe.Sizeof(uname.Machine)-1] = 0
238
239 return nil
240 }
241
242 func Sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) {
243 if raceenabled {
244 raceReleaseMerge(unsafe.Pointer(&ioSync))
245 }
246 return sendfile(outfd, infd, offset, count)
247 }
248
249 func Dup3(oldfd, newfd, flags int) error {
250 if oldfd == newfd || flags&^O_CLOEXEC != 0 {
251 return EINVAL
252 }
253 how := F_DUP2FD
254 if flags&O_CLOEXEC != 0 {
255 how = F_DUP2FD_CLOEXEC
256 }
257 _, err := fcntl(oldfd, how, newfd)
258 return err
259 }
260
261 /*
262 * Exposed directly
263 */
264 //sys Access(path string, mode uint32) (err error)
265 //sys Adjtime(delta *Timeval, olddelta *Timeval) (err error)
266 //sys Chdir(path string) (err error)
267 //sys Chflags(path string, flags int) (err error)
268 //sys Chmod(path string, mode uint32) (err error)
269 //sys Chown(path string, uid int, gid int) (err error)
270 //sys Chroot(path string) (err error)
271 //sys ClockGettime(clockid int32, time *Timespec) (err error)
272 //sys Close(fd int) (err error)
273 //sys Dup(fd int) (nfd int, err error)
274 //sys Dup2(from int, to int) (err error)
275 //sys Exit(code int)
276 //sys Faccessat(dirfd int, path string, mode uint32, flags int) (err error)
277 //sys Fchdir(fd int) (err error)
278 //sys Fchflags(fd int, flags int) (err error)
279 //sys Fchmod(fd int, mode uint32) (err error)
280 //sys Fchmodat(dirfd int, path string, mode uint32, flags int) (err error)
281 //sys Fchown(fd int, uid int, gid int) (err error)
282 //sys Fchownat(dirfd int, path string, uid int, gid int, flags int) (err error)
283 //sys Flock(fd int, how int) (err error)
284 //sys Fpathconf(fd int, name int) (val int, err error)
285 //sys Fstat(fd int, stat *Stat_t) (err error)
286 //sys Fstatat(fd int, path string, stat *Stat_t, flags int) (err error)
287 //sys Fstatfs(fd int, stat *Statfs_t) (err error)
288 //sys Fsync(fd int) (err error)
289 //sys Ftruncate(fd int, length int64) (err error)
290 //sys Getdents(fd int, buf []byte) (n int, err error)
291 //sys Getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error)
292 //sys Getdtablesize() (size int)
293 //sysnb Getegid() (egid int)
294 //sysnb Geteuid() (uid int)
295 //sysnb Getgid() (gid int)
296 //sysnb Getpgid(pid int) (pgid int, err error)
297 //sysnb Getpgrp() (pgrp int)
298 //sysnb Getpid() (pid int)
299 //sysnb Getppid() (ppid int)
300 //sys Getpriority(which int, who int) (prio int, err error)
301 //sysnb Getrlimit(which int, lim *Rlimit) (err error)
302 //sysnb Getrusage(who int, rusage *Rusage) (err error)
303 //sysnb Getsid(pid int) (sid int, err error)
304 //sysnb Gettimeofday(tv *Timeval) (err error)
305 //sysnb Getuid() (uid int)
306 //sys Issetugid() (tainted bool)
307 //sys Kill(pid int, signum syscall.Signal) (err error)
308 //sys Kqueue() (fd int, err error)
309 //sys Lchown(path string, uid int, gid int) (err error)
310 //sys Link(path string, link string) (err error)
311 //sys Linkat(pathfd int, path string, linkfd int, link string, flags int) (err error)
312 //sys Listen(s int, backlog int) (err error)
313 //sys Lstat(path string, stat *Stat_t) (err error)
314 //sys Mkdir(path string, mode uint32) (err error)
315 //sys Mkdirat(dirfd int, path string, mode uint32) (err error)
316 //sys Mkfifo(path string, mode uint32) (err error)
317 //sys Mknod(path string, mode uint32, dev int) (err error)
318 //sys Mknodat(fd int, path string, mode uint32, dev int) (err error)
319 //sys Nanosleep(time *Timespec, leftover *Timespec) (err error)
320 //sys Open(path string, mode int, perm uint32) (fd int, err error)
321 //sys Openat(dirfd int, path string, mode int, perm uint32) (fd int, err error)
322 //sys Pathconf(path string, name int) (val int, err error)
323 //sys read(fd int, p []byte) (n int, err error)
324 //sys Readlink(path string, buf []byte) (n int, err error)
325 //sys Rename(from string, to string) (err error)
326 //sys Renameat(fromfd int, from string, tofd int, to string) (err error)
327 //sys Revoke(path string) (err error)
328 //sys Rmdir(path string) (err error)
329 //sys Seek(fd int, offset int64, whence int) (newoffset int64, err error) = SYS_LSEEK
330 //sys Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error)
331 //sysnb Setegid(egid int) (err error)
332 //sysnb Seteuid(euid int) (err error)
333 //sysnb Setgid(gid int) (err error)
334 //sys Setlogin(name string) (err error)
335 //sysnb Setpgid(pid int, pgid int) (err error)
336 //sys Setpriority(which int, who int, prio int) (err error)
337 //sysnb Setregid(rgid int, egid int) (err error)
338 //sysnb Setreuid(ruid int, euid int) (err error)
339 //sysnb Setresgid(rgid int, egid int, sgid int) (err error)
340 //sysnb Setresuid(ruid int, euid int, suid int) (err error)
341 //sysnb Setsid() (pid int, err error)
342 //sysnb Settimeofday(tp *Timeval) (err error)
343 //sysnb Setuid(uid int) (err error)
344 //sys Stat(path string, stat *Stat_t) (err error)
345 //sys Statfs(path string, stat *Statfs_t) (err error)
346 //sys Symlink(path string, link string) (err error)
347 //sys Symlinkat(oldpath string, newdirfd int, newpath string) (err error)
348 //sys Sync() (err error)
349 //sys Truncate(path string, length int64) (err error)
350 //sys Umask(newmask int) (oldmask int)
351 //sys Undelete(path string) (err error)
352 //sys Unlink(path string) (err error)
353 //sys Unlinkat(dirfd int, path string, flags int) (err error)
354 //sys Unmount(path string, flags int) (err error)
355 //sys write(fd int, p []byte) (n int, err error)
356 //sys mmap(addr uintptr, length uintptr, prot int, flag int, fd int, pos int64) (ret uintptr, err error)
357 //sys munmap(addr uintptr, length uintptr) (err error)
358 //sys accept4(fd int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (nfd int, err error)
359 //sys utimensat(dirfd int, path string, times *[2]Timespec, flags int) (err error)
360