| // Copyright 2009,2010 The Go Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| // FreeBSD system calls. |
| // This file is compiled as ordinary Go code, |
| // but it is also input to mksyscall, |
| // which parses the //sys lines and generates system call stubs. |
| // Note that sometimes we use a lowercase //sys name and wrap |
| // it in our own nicer implementation, either here or in |
| // syscall_bsd.go or syscall_unix.go. |
| |
| package syscall |
| |
| import "unsafe" |
| |
| func Syscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno) |
| func Syscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err Errno) |
| func RawSyscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno) |
| func RawSyscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err Errno) |
| |
| type SockaddrDatalink struct { |
| Len uint8 |
| Family uint8 |
| Index uint16 |
| Type uint8 |
| Nlen uint8 |
| Alen uint8 |
| Slen uint8 |
| Data [46]int8 |
| raw RawSockaddrDatalink |
| } |
| |
| // Translate "kern.hostname" to []_C_int{0,1,2,3}. |
| func nametomib(name string) (mib []_C_int, err error) { |
| const siz = unsafe.Sizeof(mib[0]) |
| |
| // NOTE(rsc): It seems strange to set the buffer to have |
| // size CTL_MAXNAME+2 but use only CTL_MAXNAME |
| // as the size. I don't know why the +2 is here, but the |
| // kernel uses +2 for its own implementation of this function. |
| // I am scared that if we don't include the +2 here, the kernel |
| // will silently write 2 words farther than we specify |
| // and we'll get memory corruption. |
| var buf [CTL_MAXNAME + 2]_C_int |
| n := uintptr(CTL_MAXNAME) * siz |
| |
| p := (*byte)(unsafe.Pointer(&buf[0])) |
| bytes, err := ByteSliceFromString(name) |
| if err != nil { |
| return nil, err |
| } |
| |
| // Magic sysctl: "setting" 0.3 to a string name |
| // lets you read back the array of integers form. |
| if err = sysctl([]_C_int{0, 3}, p, &n, &bytes[0], uintptr(len(name))); err != nil { |
| return nil, err |
| } |
| return buf[0 : n/siz], nil |
| } |
| |
| func direntIno(buf []byte) (uint64, bool) { |
| return readInt(buf, unsafe.Offsetof(Dirent{}.Fileno), unsafe.Sizeof(Dirent{}.Fileno)) |
| } |
| |
| func direntReclen(buf []byte) (uint64, bool) { |
| return readInt(buf, unsafe.Offsetof(Dirent{}.Reclen), unsafe.Sizeof(Dirent{}.Reclen)) |
| } |
| |
| func direntNamlen(buf []byte) (uint64, bool) { |
| return readInt(buf, unsafe.Offsetof(Dirent{}.Namlen), unsafe.Sizeof(Dirent{}.Namlen)) |
| } |
| |
| func Pipe(p []int) error { |
| return Pipe2(p, 0) |
| } |
| |
| //sysnb pipe2(p *[2]_C_int, flags int) (err error) |
| |
| func Pipe2(p []int, flags int) error { |
| if len(p) != 2 { |
| return EINVAL |
| } |
| var pp [2]_C_int |
| err := pipe2(&pp, flags) |
| if err == nil { |
| p[0] = int(pp[0]) |
| p[1] = int(pp[1]) |
| } |
| return err |
| } |
| |
| func GetsockoptIPMreqn(fd, level, opt int) (*IPMreqn, error) { |
| var value IPMreqn |
| vallen := _Socklen(SizeofIPMreqn) |
| errno := getsockopt(fd, level, opt, unsafe.Pointer(&value), &vallen) |
| return &value, errno |
| } |
| |
| func SetsockoptIPMreqn(fd, level, opt int, mreq *IPMreqn) (err error) { |
| return setsockopt(fd, level, opt, unsafe.Pointer(mreq), unsafe.Sizeof(*mreq)) |
| } |
| |
| func Accept4(fd, flags int) (nfd int, sa Sockaddr, err error) { |
| var rsa RawSockaddrAny |
| var len _Socklen = SizeofSockaddrAny |
| nfd, err = accept4(fd, &rsa, &len, flags) |
| if err != nil { |
| return |
| } |
| if len > SizeofSockaddrAny { |
| panic("RawSockaddrAny too small") |
| } |
| sa, err = anyToSockaddr(&rsa) |
| if err != nil { |
| Close(nfd) |
| nfd = 0 |
| } |
| return |
| } |
| |
| func Getfsstat(buf []Statfs_t, flags int) (n int, err error) { |
| var ( |
| _p0 unsafe.Pointer |
| bufsize uintptr |
| ) |
| if len(buf) > 0 { |
| _p0 = unsafe.Pointer(&buf[0]) |
| bufsize = unsafe.Sizeof(Statfs_t{}) * uintptr(len(buf)) |
| } |
| r0, _, e1 := Syscall(SYS_GETFSSTAT, uintptr(_p0), bufsize, uintptr(flags)) |
| n = int(r0) |
| if e1 != 0 { |
| err = e1 |
| } |
| return |
| } |
| |
| func Stat(path string, st *Stat_t) (err error) { |
| return Fstatat(_AT_FDCWD, path, st, 0) |
| } |
| |
| func Lstat(path string, st *Stat_t) (err error) { |
| return Fstatat(_AT_FDCWD, path, st, _AT_SYMLINK_NOFOLLOW) |
| } |
| |
| func Getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error) { |
| if basep == nil || unsafe.Sizeof(*basep) == 8 { |
| return getdirentries(fd, buf, (*uint64)(unsafe.Pointer(basep))) |
| } |
| // The syscall needs a 64-bit base. On 32-bit machines |
| // we can't just use the basep passed in. See #32498. |
| var base uint64 = uint64(*basep) |
| n, err = getdirentries(fd, buf, &base) |
| *basep = uintptr(base) |
| if base>>32 != 0 { |
| // We can't stuff the base back into a uintptr, so any |
| // future calls would be suspect. Generate an error. |
| // EIO is allowed by getdirentries. |
| err = EIO |
| } |
| return |
| } |
| |
| func Mknod(path string, mode uint32, dev uint64) (err error) { |
| return mknodat(_AT_FDCWD, path, mode, dev) |
| } |
| |
| /* |
| * Exposed directly |
| */ |
| //sys Access(path string, mode uint32) (err error) |
| //sys Adjtime(delta *Timeval, olddelta *Timeval) (err error) |
| //sys Chdir(path string) (err error) |
| //sys Chflags(path string, flags int) (err error) |
| //sys Chmod(path string, mode uint32) (err error) |
| //sys Chown(path string, uid int, gid int) (err error) |
| //sys Chroot(path string) (err error) |
| //sys Close(fd int) (err error) |
| //sys Dup(fd int) (nfd int, err error) |
| //sys Dup2(from int, to int) (err error) |
| //sys Fchdir(fd int) (err error) |
| //sys Fchflags(fd int, flags int) (err error) |
| //sys Fchmod(fd int, mode uint32) (err error) |
| //sys Fchown(fd int, uid int, gid int) (err error) |
| //sys Flock(fd int, how int) (err error) |
| //sys Fpathconf(fd int, name int) (val int, err error) |
| //sys Fstat(fd int, stat *Stat_t) (err error) |
| //sys Fstatat(fd int, path string, stat *Stat_t, flags int) (err error) |
| //sys Fstatfs(fd int, stat *Statfs_t) (err error) |
| //sys Fsync(fd int) (err error) |
| //sys Ftruncate(fd int, length int64) (err error) |
| //sys getdirentries(fd int, buf []byte, basep *uint64) (n int, err error) |
| //sys Getdtablesize() (size int) |
| //sysnb Getegid() (egid int) |
| //sysnb Geteuid() (uid int) |
| //sysnb Getgid() (gid int) |
| //sysnb Getpgid(pid int) (pgid int, err error) |
| //sysnb Getpgrp() (pgrp int) |
| //sysnb Getpid() (pid int) |
| //sysnb Getppid() (ppid int) |
| //sys Getpriority(which int, who int) (prio int, err error) |
| //sysnb Getrlimit(which int, lim *Rlimit) (err error) |
| //sysnb Getrusage(who int, rusage *Rusage) (err error) |
| //sysnb Getsid(pid int) (sid int, err error) |
| //sysnb Gettimeofday(tv *Timeval) (err error) |
| //sysnb Getuid() (uid int) |
| //sys Issetugid() (tainted bool) |
| //sys Kill(pid int, signum Signal) (err error) |
| //sys Kqueue() (fd int, err error) |
| //sys Lchown(path string, uid int, gid int) (err error) |
| //sys Link(path string, link string) (err error) |
| //sys Listen(s int, backlog int) (err error) |
| //sys Mkdir(path string, mode uint32) (err error) |
| //sys Mkfifo(path string, mode uint32) (err error) |
| //sys mknodat(fd int, path string, mode uint32, dev uint64) (err error) |
| //sys Nanosleep(time *Timespec, leftover *Timespec) (err error) |
| //sys Open(path string, mode int, perm uint32) (fd int, err error) |
| //sys Pathconf(path string, name int) (val int, err error) |
| //sys pread(fd int, p []byte, offset int64) (n int, err error) |
| //sys pwrite(fd int, p []byte, offset int64) (n int, err error) |
| //sys read(fd int, p []byte) (n int, err error) |
| //sys Readlink(path string, buf []byte) (n int, err error) |
| //sys Rename(from string, to string) (err error) |
| //sys Revoke(path string) (err error) |
| //sys Rmdir(path string) (err error) |
| //sys Seek(fd int, offset int64, whence int) (newoffset int64, err error) = SYS_LSEEK |
| //sys Select(n int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (err error) |
| //sysnb Setegid(egid int) (err error) |
| //sysnb Seteuid(euid int) (err error) |
| //sysnb Setgid(gid int) (err error) |
| //sys Setlogin(name string) (err error) |
| //sysnb Setpgid(pid int, pgid int) (err error) |
| //sys Setpriority(which int, who int, prio int) (err error) |
| //sysnb Setregid(rgid int, egid int) (err error) |
| //sysnb Setreuid(ruid int, euid int) (err error) |
| //sysnb setrlimit(which int, lim *Rlimit) (err error) |
| //sysnb Setsid() (pid int, err error) |
| //sysnb Settimeofday(tp *Timeval) (err error) |
| //sysnb Setuid(uid int) (err error) |
| //sys Statfs(path string, stat *Statfs_t) (err error) |
| //sys Symlink(path string, link string) (err error) |
| //sys Sync() (err error) |
| //sys Truncate(path string, length int64) (err error) |
| //sys Umask(newmask int) (oldmask int) |
| //sys Undelete(path string) (err error) |
| //sys Unlink(path string) (err error) |
| //sys Unmount(path string, flags int) (err error) |
| //sys write(fd int, p []byte) (n int, err error) |
| //sys mmap(addr uintptr, length uintptr, prot int, flag int, fd int, pos int64) (ret uintptr, err error) |
| //sys munmap(addr uintptr, length uintptr) (err error) |
| //sys readlen(fd int, buf *byte, nbuf int) (n int, err error) = SYS_READ |
| //sys writelen(fd int, buf *byte, nbuf int) (n int, err error) = SYS_WRITE |
| //sys accept4(fd int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (nfd int, err error) |
| //sys utimensat(dirfd int, path string, times *[2]Timespec, flag int) (err error) |
| //sys getcwd(buf []byte) (n int, err error) = SYS___GETCWD |
| //sys sysctl(mib []_C_int, old *byte, oldlen *uintptr, new *byte, newlen uintptr) (err error) = SYS___SYSCTL |