Source file src/syscall/syscall_dragonfly.go
Documentation: syscall
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 // 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 type SockaddrDatalink struct { 36 Len uint8 37 Family uint8 38 Index uint16 39 Type uint8 40 Nlen uint8 41 Alen uint8 42 Slen uint8 43 Data [12]int8 44 Rcf uint16 45 Route [16]uint16 46 raw RawSockaddrDatalink 47 } 48 49 // Translate "kern.hostname" to []_C_int{0,1,2,3}. 50 func 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 77 func direntIno(buf []byte) (uint64, bool) { 78 return readInt(buf, unsafe.Offsetof(Dirent{}.Fileno), unsafe.Sizeof(Dirent{}.Fileno)) 79 } 80 81 func direntReclen(buf []byte) (uint64, bool) { 82 namlen, ok := direntNamlen(buf) 83 if !ok { 84 return 0, false 85 } 86 return (16 + namlen + 1 + 7) &^ 7, true 87 } 88 89 func direntNamlen(buf []byte) (uint64, bool) { 90 return readInt(buf, unsafe.Offsetof(Dirent{}.Namlen), unsafe.Sizeof(Dirent{}.Namlen)) 91 } 92 93 //sysnb pipe() (r int, w int, err error) 94 95 func Pipe(p []int) (err error) { 96 if len(p) != 2 { 97 return EINVAL 98 } 99 p[0], p[1], err = pipe() 100 return 101 } 102 103 //sysnb pipe2(p *[2]_C_int, flags int) (r int, w int, err error) 104 105 func Pipe2(p []int, flags int) (err error) { 106 if len(p) != 2 { 107 return EINVAL 108 } 109 var pp [2]_C_int 110 // pipe2 on dragonfly takes an fds array as an argument, but still 111 // returns the file descriptors. 112 p[0], p[1], err = pipe2(&pp, flags) 113 return err 114 } 115 116 //sys extpread(fd int, p []byte, flags int, offset int64) (n int, err error) 117 func Pread(fd int, p []byte, offset int64) (n int, err error) { 118 return extpread(fd, p, 0, offset) 119 } 120 121 //sys extpwrite(fd int, p []byte, flags int, offset int64) (n int, err error) 122 func Pwrite(fd int, p []byte, offset int64) (n int, err error) { 123 return extpwrite(fd, p, 0, offset) 124 } 125 126 func Accept4(fd, flags int) (nfd int, sa Sockaddr, err error) { 127 var rsa RawSockaddrAny 128 var len _Socklen = SizeofSockaddrAny 129 nfd, err = accept4(fd, &rsa, &len, flags) 130 if err != nil { 131 return 132 } 133 if len > SizeofSockaddrAny { 134 panic("RawSockaddrAny too small") 135 } 136 sa, err = anyToSockaddr(&rsa) 137 if err != nil { 138 Close(nfd) 139 nfd = 0 140 } 141 return 142 } 143 144 func Getfsstat(buf []Statfs_t, flags int) (n int, err error) { 145 var _p0 unsafe.Pointer 146 var bufsize uintptr 147 if len(buf) > 0 { 148 _p0 = unsafe.Pointer(&buf[0]) 149 bufsize = unsafe.Sizeof(Statfs_t{}) * uintptr(len(buf)) 150 } 151 r0, _, e1 := Syscall(SYS_GETFSSTAT, uintptr(_p0), bufsize, uintptr(flags)) 152 n = int(r0) 153 if e1 != 0 { 154 err = e1 155 } 156 return 157 } 158 159 func setattrlistTimes(path string, times []Timespec) error { 160 // used on Darwin for UtimesNano 161 return ENOSYS 162 } 163 164 /* 165 * Exposed directly 166 */ 167 //sys Access(path string, mode uint32) (err error) 168 //sys Adjtime(delta *Timeval, olddelta *Timeval) (err error) 169 //sys Chdir(path string) (err error) 170 //sys Chflags(path string, flags int) (err error) 171 //sys Chmod(path string, mode uint32) (err error) 172 //sys Chown(path string, uid int, gid int) (err error) 173 //sys Chroot(path string) (err error) 174 //sys Close(fd int) (err error) 175 //sys Dup(fd int) (nfd int, err error) 176 //sys Dup2(from int, to int) (err error) 177 //sys Fchdir(fd int) (err error) 178 //sys Fchflags(fd int, flags int) (err error) 179 //sys Fchmod(fd int, mode uint32) (err error) 180 //sys Fchown(fd int, uid int, gid int) (err error) 181 //sys Flock(fd int, how int) (err error) 182 //sys Fpathconf(fd int, name int) (val int, err error) 183 //sys Fstat(fd int, stat *Stat_t) (err error) 184 //sys Fstatfs(fd int, stat *Statfs_t) (err error) 185 //sys Fsync(fd int) (err error) 186 //sys Ftruncate(fd int, length int64) (err error) 187 //sys Getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error) 188 //sys Getdtablesize() (size int) 189 //sysnb Getegid() (egid int) 190 //sysnb Geteuid() (uid int) 191 //sysnb Getgid() (gid int) 192 //sysnb Getpgid(pid int) (pgid int, err error) 193 //sysnb Getpgrp() (pgrp int) 194 //sysnb Getpid() (pid int) 195 //sysnb Getppid() (ppid int) 196 //sys Getpriority(which int, who int) (prio int, err error) 197 //sysnb Getrlimit(which int, lim *Rlimit) (err error) 198 //sysnb Getrusage(who int, rusage *Rusage) (err error) 199 //sysnb Getsid(pid int) (sid int, err error) 200 //sysnb Gettimeofday(tv *Timeval) (err error) 201 //sysnb Getuid() (uid int) 202 //sys Issetugid() (tainted bool) 203 //sys Kill(pid int, signum Signal) (err error) 204 //sys Kqueue() (fd int, err error) 205 //sys Lchown(path string, uid int, gid int) (err error) 206 //sys Link(path string, link string) (err error) 207 //sys Listen(s int, backlog int) (err error) 208 //sys Lstat(path string, stat *Stat_t) (err error) 209 //sys Mkdir(path string, mode uint32) (err error) 210 //sys Mkfifo(path string, mode uint32) (err error) 211 //sys Mknod(path string, mode uint32, dev int) (err error) 212 //sys Nanosleep(time *Timespec, leftover *Timespec) (err error) 213 //sys Open(path string, mode int, perm uint32) (fd int, err error) 214 //sys Pathconf(path string, name int) (val int, err error) 215 //sys read(fd int, p []byte) (n int, err error) 216 //sys Readlink(path string, buf []byte) (n int, err error) 217 //sys Rename(from string, to string) (err error) 218 //sys Revoke(path string) (err error) 219 //sys Rmdir(path string) (err error) 220 //sys Seek(fd int, offset int64, whence int) (newoffset int64, err error) = SYS_LSEEK 221 //sys Select(n int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (err error) 222 //sysnb Setegid(egid int) (err error) 223 //sysnb Seteuid(euid int) (err error) 224 //sysnb Setgid(gid int) (err error) 225 //sys Setlogin(name string) (err error) 226 //sysnb Setpgid(pid int, pgid int) (err error) 227 //sys Setpriority(which int, who int, prio int) (err error) 228 //sysnb Setregid(rgid int, egid int) (err error) 229 //sysnb Setreuid(ruid int, euid int) (err error) 230 //sysnb Setrlimit(which int, lim *Rlimit) (err error) 231 //sysnb Setsid() (pid int, err error) 232 //sysnb Settimeofday(tp *Timeval) (err error) 233 //sysnb Setuid(uid int) (err error) 234 //sys Stat(path string, stat *Stat_t) (err error) 235 //sys Statfs(path string, stat *Statfs_t) (err error) 236 //sys Symlink(path string, link string) (err error) 237 //sys Sync() (err error) 238 //sys Truncate(path string, length int64) (err error) 239 //sys Umask(newmask int) (oldmask int) 240 //sys Undelete(path string) (err error) 241 //sys Unlink(path string) (err error) 242 //sys Unmount(path string, flags int) (err error) 243 //sys write(fd int, p []byte) (n int, err error) 244 //sys mmap(addr uintptr, length uintptr, prot int, flag int, fd int, pos int64) (ret uintptr, err error) 245 //sys munmap(addr uintptr, length uintptr) (err error) 246 //sys readlen(fd int, buf *byte, nbuf int) (n int, err error) = SYS_READ 247 //sys writelen(fd int, buf *byte, nbuf int) (n int, err error) = SYS_WRITE 248 //sys accept4(fd int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (nfd int, err error) 249 //sys utimensat(dirfd int, path string, times *[2]Timespec, flag int) (err error) 250 //sys getcwd(buf []byte) (n int, err error) = SYS___GETCWD 251 //sys sysctl(mib []_C_int, old *byte, oldlen *uintptr, new *byte, newlen uintptr) (err error) = SYS___SYSCTL 252