syscall_dragonfly.mx 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 syscall
14
15 import (
16 "sync"
17 "unsafe"
18 )
19
20 func Syscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno)
21 func Syscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err Errno)
22 func RawSyscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno)
23 func RawSyscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err Errno)
24
25 const (
26 _SYS_DUP3 = 0
27 _F_DUP2FD_CLOEXEC = F_DUP2FD_CLOEXEC
28 )
29
30 // See version list in https://github.com/DragonFlyBSD/DragonFlyBSD/blob/master/sys/sys/param.h
31 var (
32 osreldateOnce sync.Once
33 osreldate uint32
34 )
35
36 // First __DragonFly_version after September 2019 ABI changes
37 // http://lists.dragonflybsd.org/pipermail/users/2019-September/358280.html
38 const _dragonflyABIChangeVersion = 500705
39
40 func supportsABI(ver uint32) bool {
41 osreldateOnce.Do(func() { osreldate, _ = SysctlUint32("kern.osreldate") })
42 return osreldate >= ver
43 }
44
45 type SockaddrDatalink struct {
46 Len uint8
47 Family uint8
48 Index uint16
49 Type uint8
50 Nlen uint8
51 Alen uint8
52 Slen uint8
53 Data [12]int8
54 Rcf uint16
55 Route [16]uint16
56 raw RawSockaddrDatalink
57 }
58
59 // Translate "kern.hostname" to []_C_int{0,1,2,3}.
60 func nametomib(name string) (mib []_C_int, err error) {
61 const siz = unsafe.Sizeof(mib[0])
62
63 // NOTE(rsc): It seems strange to set the buffer to have
64 // size CTL_MAXNAME+2 but use only CTL_MAXNAME
65 // as the size. I don't know why the +2 is here, but the
66 // kernel uses +2 for its own implementation of this function.
67 // I am scared that if we don't include the +2 here, the kernel
68 // will silently write 2 words farther than we specify
69 // and we'll get memory corruption.
70 var buf [CTL_MAXNAME + 2]_C_int
71 n := uintptr(CTL_MAXNAME) * siz
72
73 p := (*byte)(unsafe.Pointer(&buf[0]))
74 bytes, err := ByteSliceFromString(name)
75 if err != nil {
76 return nil, err
77 }
78
79 // Magic sysctl: "setting" 0.3 to a string name
80 // lets you read back the array of integers form.
81 if err = sysctl([]_C_int{0, 3}, p, &n, &bytes[0], uintptr(len(name))); err != nil {
82 return nil, err
83 }
84 return buf[0 : n/siz], nil
85 }
86
87 func direntIno(buf []byte) (uint64, bool) {
88 return readInt(buf, unsafe.Offsetof(Dirent{}.Fileno), unsafe.Sizeof(Dirent{}.Fileno))
89 }
90
91 func direntReclen(buf []byte) (uint64, bool) {
92 namlen, ok := direntNamlen(buf)
93 if !ok {
94 return 0, false
95 }
96 return (16 + namlen + 1 + 7) &^ 7, true
97 }
98
99 func direntNamlen(buf []byte) (uint64, bool) {
100 return readInt(buf, unsafe.Offsetof(Dirent{}.Namlen), unsafe.Sizeof(Dirent{}.Namlen))
101 }
102
103 //sysnb pipe() (r int, w int, err error)
104
105 func Pipe(p []int) (err error) {
106 if len(p) != 2 {
107 return EINVAL
108 }
109 r, w, err := pipe()
110 if err == nil {
111 p[0], p[1] = r, w
112 }
113 return err
114 }
115
116 //sysnb pipe2(p *[2]_C_int, flags int) (r int, w int, err error)
117
118 func Pipe2(p []int, flags int) (err error) {
119 if len(p) != 2 {
120 return EINVAL
121 }
122 var pp [2]_C_int
123 // pipe2 on dragonfly takes an fds array as an argument, but still
124 // returns the file descriptors.
125 r, w, err := pipe2(&pp, flags)
126 if err == nil {
127 p[0], p[1] = r, w
128 }
129 return err
130 }
131
132 //sys extpread(fd int, p []byte, flags int, offset int64) (n int, err error)
133
134 func pread(fd int, p []byte, offset int64) (n int, err error) {
135 return extpread(fd, p, 0, offset)
136 }
137
138 //sys extpwrite(fd int, p []byte, flags int, offset int64) (n int, err error)
139
140 func pwrite(fd int, p []byte, offset int64) (n int, err error) {
141 return extpwrite(fd, p, 0, offset)
142 }
143
144 func Accept4(fd, flags int) (nfd int, sa Sockaddr, err error) {
145 var rsa RawSockaddrAny
146 var len _Socklen = SizeofSockaddrAny
147 nfd, err = accept4(fd, &rsa, &len, flags)
148 if err != nil {
149 return
150 }
151 if len > SizeofSockaddrAny {
152 panic("RawSockaddrAny too small")
153 }
154 sa, err = anyToSockaddr(&rsa)
155 if err != nil {
156 Close(nfd)
157 nfd = 0
158 }
159 return
160 }
161
162 func Getfsstat(buf []Statfs_t, flags int) (n int, err error) {
163 var _p0 unsafe.Pointer
164 var bufsize uintptr
165 if len(buf) > 0 {
166 _p0 = unsafe.Pointer(&buf[0])
167 bufsize = unsafe.Sizeof(Statfs_t{}) * uintptr(len(buf))
168 }
169 r0, _, e1 := Syscall(SYS_GETFSSTAT, uintptr(_p0), bufsize, uintptr(flags))
170 n = int(r0)
171 if e1 != 0 {
172 err = e1
173 }
174 return
175 }
176
177 /*
178 * Exposed directly
179 */
180 //sys Access(path string, mode uint32) (err error)
181 //sys Adjtime(delta *Timeval, olddelta *Timeval) (err error)
182 //sys Chdir(path string) (err error)
183 //sys Chflags(path string, flags int) (err error)
184 //sys Chmod(path string, mode uint32) (err error)
185 //sys Chown(path string, uid int, gid int) (err error)
186 //sys Chroot(path string) (err error)
187 //sys Close(fd int) (err error)
188 //sys Dup(fd int) (nfd int, err error)
189 //sys Dup2(from int, to int) (err error)
190 //sys Fchdir(fd int) (err error)
191 //sys Fchflags(fd int, flags int) (err error)
192 //sys Fchmod(fd int, mode uint32) (err error)
193 //sys Fchown(fd int, uid int, gid int) (err error)
194 //sys Flock(fd int, how int) (err error)
195 //sys Fpathconf(fd int, name int) (val int, err error)
196 //sys Fstat(fd int, stat *Stat_t) (err error)
197 //sys Fstatfs(fd int, stat *Statfs_t) (err error)
198 //sys Fsync(fd int) (err error)
199 //sys Ftruncate(fd int, length int64) (err error)
200 //sys Getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error)
201 //sys Getdtablesize() (size int)
202 //sysnb Getegid() (egid int)
203 //sysnb Geteuid() (uid int)
204 //sysnb Getgid() (gid int)
205 //sysnb Getpgid(pid int) (pgid int, err error)
206 //sysnb Getpgrp() (pgrp int)
207 //sysnb Getpid() (pid int)
208 //sysnb Getppid() (ppid int)
209 //sys Getpriority(which int, who int) (prio int, err error)
210 //sysnb Getrlimit(which int, lim *Rlimit) (err error)
211 //sysnb Getrusage(who int, rusage *Rusage) (err error)
212 //sysnb Getsid(pid int) (sid int, err error)
213 //sysnb Gettimeofday(tv *Timeval) (err error)
214 //sysnb Getuid() (uid int)
215 //sys Issetugid() (tainted bool)
216 //sys Kill(pid int, signum Signal) (err error)
217 //sys Kqueue() (fd int, err error)
218 //sys Lchown(path string, uid int, gid int) (err error)
219 //sys Link(path string, link string) (err error)
220 //sys Listen(s int, backlog int) (err error)
221 //sys Lstat(path string, stat *Stat_t) (err error)
222 //sys Mkdir(path string, mode uint32) (err error)
223 //sys Mkfifo(path string, mode uint32) (err error)
224 //sys Mknod(path string, mode uint32, dev int) (err error)
225 //sys Nanosleep(time *Timespec, leftover *Timespec) (err error)
226 //sys Open(path string, mode int, perm uint32) (fd int, err error)
227 //sys Pathconf(path string, name int) (val int, err error)
228 //sys read(fd int, p []byte) (n int, err error)
229 //sys Readlink(path string, buf []byte) (n int, err error)
230 //sys Rename(from string, to string) (err error)
231 //sys Revoke(path string) (err error)
232 //sys Rmdir(path string) (err error)
233 //sys Seek(fd int, offset int64, whence int) (newoffset int64, err error) = SYS_LSEEK
234 //sys Select(n int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (err error)
235 //sysnb Setegid(egid int) (err error)
236 //sysnb Seteuid(euid int) (err error)
237 //sysnb Setgid(gid int) (err error)
238 //sys Setlogin(name string) (err error)
239 //sysnb Setpgid(pid int, pgid int) (err error)
240 //sys Setpriority(which int, who int, prio int) (err error)
241 //sysnb Setregid(rgid int, egid int) (err error)
242 //sysnb Setreuid(ruid int, euid int) (err error)
243 //sysnb setrlimit(which int, lim *Rlimit) (err error)
244 //sysnb Setsid() (pid int, err error)
245 //sysnb Settimeofday(tp *Timeval) (err error)
246 //sysnb Setuid(uid int) (err error)
247 //sys Stat(path string, stat *Stat_t) (err error)
248 //sys Statfs(path string, stat *Statfs_t) (err error)
249 //sys Symlink(path string, link string) (err error)
250 //sys Sync() (err error)
251 //sys Truncate(path string, length int64) (err error)
252 //sys Umask(newmask int) (oldmask int)
253 //sys Undelete(path string) (err error)
254 //sys Unlink(path string) (err error)
255 //sys Unmount(path string, flags int) (err error)
256 //sys write(fd int, p []byte) (n int, err error)
257 //sys mmap(addr uintptr, length uintptr, prot int, flag int, fd int, pos int64) (ret uintptr, err error)
258 //sys munmap(addr uintptr, length uintptr) (err error)
259 //sys readlen(fd int, buf *byte, nbuf int) (n int, err error) = SYS_READ
260 //sys accept4(fd int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (nfd int, err error)
261 //sys utimensat(dirfd int, path string, times *[2]Timespec, flag int) (err error)
262 //sys getcwd(buf []byte) (n int, err error) = SYS___GETCWD
263 //sys sysctl(mib []_C_int, old *byte, oldlen *uintptr, new *byte, newlen uintptr) (err error) = SYS___SYSCTL
264