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