You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
455 lines
16 KiB
455 lines
16 KiB
// 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 unix |
|
|
|
import ( |
|
"errors" |
|
"sync" |
|
"unsafe" |
|
) |
|
|
|
// See https://www.freebsd.org/doc/en_US.ISO8859-1/books/porters-handbook/versions.html. |
|
var ( |
|
osreldateOnce sync.Once |
|
osreldate uint32 |
|
) |
|
|
|
func supportsABI(ver uint32) bool { |
|
osreldateOnce.Do(func() { osreldate, _ = SysctlUint32("kern.osreldate") }) |
|
return osreldate >= ver |
|
} |
|
|
|
// SockaddrDatalink implements the Sockaddr interface for AF_LINK type sockets. |
|
type SockaddrDatalink struct { |
|
Len uint8 |
|
Family uint8 |
|
Index uint16 |
|
Type uint8 |
|
Nlen uint8 |
|
Alen uint8 |
|
Slen uint8 |
|
Data [46]int8 |
|
raw RawSockaddrDatalink |
|
} |
|
|
|
func anyToSockaddrGOOS(fd int, rsa *RawSockaddrAny) (Sockaddr, error) { |
|
return nil, EAFNOSUPPORT |
|
} |
|
|
|
// 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) (err 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)) |
|
} |
|
|
|
// GetsockoptXucred is a getsockopt wrapper that returns an Xucred struct. |
|
// The usual level and opt are SOL_LOCAL and LOCAL_PEERCRED, respectively. |
|
func GetsockoptXucred(fd, level, opt int) (*Xucred, error) { |
|
x := new(Xucred) |
|
vallen := _Socklen(SizeofXucred) |
|
err := getsockopt(fd, level, opt, unsafe.Pointer(x), &vallen) |
|
return x, err |
|
} |
|
|
|
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(fd, &rsa) |
|
if err != nil { |
|
Close(nfd) |
|
nfd = 0 |
|
} |
|
return |
|
} |
|
|
|
//sys Getcwd(buf []byte) (n int, err error) = SYS___GETCWD |
|
|
|
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 |
|
} |
|
|
|
//sys ioctl(fd int, req uint, arg uintptr) (err error) = SYS_IOCTL |
|
//sys ioctlPtr(fd int, req uint, arg unsafe.Pointer) (err error) = SYS_IOCTL |
|
|
|
//sys sysctl(mib []_C_int, old *byte, oldlen *uintptr, new *byte, newlen uintptr) (err error) = SYS___SYSCTL |
|
|
|
func Uname(uname *Utsname) error { |
|
mib := []_C_int{CTL_KERN, KERN_OSTYPE} |
|
n := unsafe.Sizeof(uname.Sysname) |
|
// Suppress ENOMEM errors to be compatible with the C library __xuname() implementation. |
|
if err := sysctl(mib, &uname.Sysname[0], &n, nil, 0); err != nil && !errors.Is(err, ENOMEM) { |
|
return err |
|
} |
|
|
|
mib = []_C_int{CTL_KERN, KERN_HOSTNAME} |
|
n = unsafe.Sizeof(uname.Nodename) |
|
if err := sysctl(mib, &uname.Nodename[0], &n, nil, 0); err != nil && !errors.Is(err, ENOMEM) { |
|
return err |
|
} |
|
|
|
mib = []_C_int{CTL_KERN, KERN_OSRELEASE} |
|
n = unsafe.Sizeof(uname.Release) |
|
if err := sysctl(mib, &uname.Release[0], &n, nil, 0); err != nil && !errors.Is(err, ENOMEM) { |
|
return err |
|
} |
|
|
|
mib = []_C_int{CTL_KERN, KERN_VERSION} |
|
n = unsafe.Sizeof(uname.Version) |
|
if err := sysctl(mib, &uname.Version[0], &n, nil, 0); err != nil && !errors.Is(err, ENOMEM) { |
|
return err |
|
} |
|
|
|
// The version might have newlines or tabs in it, convert them to |
|
// spaces. |
|
for i, b := range uname.Version { |
|
if b == '\n' || b == '\t' { |
|
if i == len(uname.Version)-1 { |
|
uname.Version[i] = 0 |
|
} else { |
|
uname.Version[i] = ' ' |
|
} |
|
} |
|
} |
|
|
|
mib = []_C_int{CTL_HW, HW_MACHINE} |
|
n = unsafe.Sizeof(uname.Machine) |
|
if err := sysctl(mib, &uname.Machine[0], &n, nil, 0); err != nil && !errors.Is(err, ENOMEM) { |
|
return err |
|
} |
|
|
|
return nil |
|
} |
|
|
|
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 Getdents(fd int, buf []byte) (n int, err error) { |
|
return Getdirentries(fd, buf, nil) |
|
} |
|
|
|
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) |
|
} |
|
|
|
func Sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) { |
|
if raceenabled { |
|
raceReleaseMerge(unsafe.Pointer(&ioSync)) |
|
} |
|
return sendfile(outfd, infd, offset, count) |
|
} |
|
|
|
//sys ptrace(request int, pid int, addr uintptr, data int) (err error) |
|
//sys ptracePtr(request int, pid int, addr unsafe.Pointer, data int) (err error) = SYS_PTRACE |
|
|
|
func PtraceAttach(pid int) (err error) { |
|
return ptrace(PT_ATTACH, pid, 0, 0) |
|
} |
|
|
|
func PtraceCont(pid int, signal int) (err error) { |
|
return ptrace(PT_CONTINUE, pid, 1, signal) |
|
} |
|
|
|
func PtraceDetach(pid int) (err error) { |
|
return ptrace(PT_DETACH, pid, 1, 0) |
|
} |
|
|
|
func PtraceGetFpRegs(pid int, fpregsout *FpReg) (err error) { |
|
return ptracePtr(PT_GETFPREGS, pid, unsafe.Pointer(fpregsout), 0) |
|
} |
|
|
|
func PtraceGetRegs(pid int, regsout *Reg) (err error) { |
|
return ptracePtr(PT_GETREGS, pid, unsafe.Pointer(regsout), 0) |
|
} |
|
|
|
func PtraceIO(req int, pid int, offs uintptr, out []byte, countin int) (count int, err error) { |
|
ioDesc := PtraceIoDesc{ |
|
Op: int32(req), |
|
Offs: offs, |
|
} |
|
if countin > 0 { |
|
_ = out[:countin] // check bounds |
|
ioDesc.Addr = &out[0] |
|
} else if out != nil { |
|
ioDesc.Addr = (*byte)(unsafe.Pointer(&_zero)) |
|
} |
|
ioDesc.SetLen(countin) |
|
|
|
err = ptracePtr(PT_IO, pid, unsafe.Pointer(&ioDesc), 0) |
|
return int(ioDesc.Len), err |
|
} |
|
|
|
func PtraceLwpEvents(pid int, enable int) (err error) { |
|
return ptrace(PT_LWP_EVENTS, pid, 0, enable) |
|
} |
|
|
|
func PtraceLwpInfo(pid int, info *PtraceLwpInfoStruct) (err error) { |
|
return ptracePtr(PT_LWPINFO, pid, unsafe.Pointer(info), int(unsafe.Sizeof(*info))) |
|
} |
|
|
|
func PtracePeekData(pid int, addr uintptr, out []byte) (count int, err error) { |
|
return PtraceIO(PIOD_READ_D, pid, addr, out, SizeofLong) |
|
} |
|
|
|
func PtracePeekText(pid int, addr uintptr, out []byte) (count int, err error) { |
|
return PtraceIO(PIOD_READ_I, pid, addr, out, SizeofLong) |
|
} |
|
|
|
func PtracePokeData(pid int, addr uintptr, data []byte) (count int, err error) { |
|
return PtraceIO(PIOD_WRITE_D, pid, addr, data, SizeofLong) |
|
} |
|
|
|
func PtracePokeText(pid int, addr uintptr, data []byte) (count int, err error) { |
|
return PtraceIO(PIOD_WRITE_I, pid, addr, data, SizeofLong) |
|
} |
|
|
|
func PtraceSetRegs(pid int, regs *Reg) (err error) { |
|
return ptracePtr(PT_SETREGS, pid, unsafe.Pointer(regs), 0) |
|
} |
|
|
|
func PtraceSingleStep(pid int) (err error) { |
|
return ptrace(PT_STEP, pid, 1, 0) |
|
} |
|
|
|
func Dup3(oldfd, newfd, flags int) error { |
|
if oldfd == newfd || flags&^O_CLOEXEC != 0 { |
|
return EINVAL |
|
} |
|
how := F_DUP2FD |
|
if flags&O_CLOEXEC != 0 { |
|
how = F_DUP2FD_CLOEXEC |
|
} |
|
_, err := fcntl(oldfd, how, newfd) |
|
return err |
|
} |
|
|
|
/* |
|
* Exposed directly |
|
*/ |
|
//sys Access(path string, mode uint32) (err error) |
|
//sys Adjtime(delta *Timeval, olddelta *Timeval) (err error) |
|
//sys CapEnter() (err error) |
|
//sys capRightsGet(version int, fd int, rightsp *CapRights) (err error) = SYS___CAP_RIGHTS_GET |
|
//sys capRightsLimit(fd int, rightsp *CapRights) (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 ClockGettime(clockid int32, time *Timespec) (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 Exit(code int) |
|
//sys ExtattrGetFd(fd int, attrnamespace int, attrname string, data uintptr, nbytes int) (ret int, err error) |
|
//sys ExtattrSetFd(fd int, attrnamespace int, attrname string, data uintptr, nbytes int) (ret int, err error) |
|
//sys ExtattrDeleteFd(fd int, attrnamespace int, attrname string) (err error) |
|
//sys ExtattrListFd(fd int, attrnamespace int, data uintptr, nbytes int) (ret int, err error) |
|
//sys ExtattrGetFile(file string, attrnamespace int, attrname string, data uintptr, nbytes int) (ret int, err error) |
|
//sys ExtattrSetFile(file string, attrnamespace int, attrname string, data uintptr, nbytes int) (ret int, err error) |
|
//sys ExtattrDeleteFile(file string, attrnamespace int, attrname string) (err error) |
|
//sys ExtattrListFile(file string, attrnamespace int, data uintptr, nbytes int) (ret int, err error) |
|
//sys ExtattrGetLink(link string, attrnamespace int, attrname string, data uintptr, nbytes int) (ret int, err error) |
|
//sys ExtattrSetLink(link string, attrnamespace int, attrname string, data uintptr, nbytes int) (ret int, err error) |
|
//sys ExtattrDeleteLink(link string, attrnamespace int, attrname string) (err error) |
|
//sys ExtattrListLink(link string, attrnamespace int, data uintptr, nbytes int) (ret int, err error) |
|
//sys Fadvise(fd int, offset int64, length int64, advice int) (err error) = SYS_POSIX_FADVISE |
|
//sys Faccessat(dirfd int, path string, mode uint32, flags 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 Fchmodat(dirfd int, path string, mode uint32, flags int) (err error) |
|
//sys Fchown(fd int, uid int, gid int) (err error) |
|
//sys Fchownat(dirfd int, path string, uid int, gid int, flags 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 syscall.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 Linkat(pathfd int, path string, linkfd int, link string, flags int) (err error) |
|
//sys Listen(s int, backlog int) (err error) |
|
//sys Mkdir(path string, mode uint32) (err error) |
|
//sys Mkdirat(dirfd int, 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 Openat(fdat int, 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 Readlinkat(dirfd int, path string, buf []byte) (n int, err error) |
|
//sys Rename(from string, to string) (err error) |
|
//sys Renameat(fromfd int, from string, tofd int, 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(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, 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 Setresgid(rgid int, egid int, sgid int) (err error) |
|
//sysnb Setresuid(ruid int, euid int, suid int) (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 Symlinkat(oldpath string, newdirfd int, newpath 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 Unlinkat(dirfd int, path string, flags int) (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 accept4(fd int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (nfd int, err error) |
|
//sys utimensat(dirfd int, path string, times *[2]Timespec, flags int) (err error)
|
|
|