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
13package unix
14
15import (
16 "sync"
17 "unsafe"
18)
19
20// See version list in https://github.com/DragonFlyBSD/DragonFlyBSD/blob/master/sys/sys/param.h
21var (
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
28const _dragonflyABIChangeVersion = 500705
29
30func 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.
36type 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
50func anyToSockaddrGOOS(fd int, rsa *RawSockaddrAny) (Sockaddr, error) {
51 return nil, EAFNOSUPPORT
52}
53
54// Translate "kern.hostname" to []_C_int{0,1,2,3}.
55func 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
82func direntIno(buf []byte) (uint64, bool) {
83 return readInt(buf, unsafe.Offsetof(Dirent{}.Fileno), unsafe.Sizeof(Dirent{}.Fileno))
84}
85
86func 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
94func 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
100func 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
113func 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
129func 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
135func pwrite(fd int, p []byte, offset int64) (n int, err error) {
136 return extpwrite(fd, p, 0, offset)
137}
138
139func 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
159func 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
179func 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
192func 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
242func 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
249func 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)