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