package syscall
import (
- errorspkg "errors"
+ "internal/abi"
"unsafe"
)
-const ImplementsGetwd = true
-
-func Getwd() (string, error) {
- buf := make([]byte, 2048)
- attrs, err := getAttrList(".", attrList{CommonAttr: attrCmnFullpath}, buf, 0)
- if err == nil && len(attrs) == 1 && len(attrs[0]) >= 2 {
- wd := string(attrs[0])
- // Sanity check that it's an absolute path and ends
- // in a null byte, which we then strip.
- if wd[0] == '/' && wd[len(wd)-1] == 0 {
- return wd[:len(wd)-1], nil
- }
- }
- // If pkg/os/getwd.go gets ENOTSUP, it will fall back to the
- // slow algorithm.
- return "", ENOTSUP
-}
+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)
+
+var dupTrampoline = abi.FuncPCABI0(libc_dup2_trampoline)
type SockaddrDatalink struct {
Len uint8
return readInt(buf, unsafe.Offsetof(Dirent{}.Namlen), unsafe.Sizeof(Dirent{}.Namlen))
}
-//sys ptrace(request int, pid int, addr uintptr, data uintptr) (err error)
func PtraceAttach(pid int) (err error) { return ptrace(PT_ATTACH, pid, 0, 0) }
func PtraceDetach(pid int) (err error) { return ptrace(PT_DETACH, pid, 0, 0) }
-const (
- attrBitMapCount = 5
- attrCmnModtime = 0x00000400
- attrCmnAcctime = 0x00001000
- attrCmnFullpath = 0x08000000
-)
-
-type attrList struct {
- bitmapCount uint16
- _ uint16
- CommonAttr uint32
- VolAttr uint32
- DirAttr uint32
- FileAttr uint32
- Forkattr uint32
-}
-
-func getAttrList(path string, attrList attrList, attrBuf []byte, options uint) (attrs [][]byte, err error) {
- if len(attrBuf) < 4 {
- return nil, errorspkg.New("attrBuf too small")
- }
- attrList.bitmapCount = attrBitMapCount
-
- var _p0 *byte
- _p0, err = BytePtrFromString(path)
- if err != nil {
- return nil, err
- }
-
- _, _, e1 := Syscall6(
- SYS_GETATTRLIST,
- uintptr(unsafe.Pointer(_p0)),
- uintptr(unsafe.Pointer(&attrList)),
- uintptr(unsafe.Pointer(&attrBuf[0])),
- uintptr(len(attrBuf)),
- uintptr(options),
- 0,
- )
- if e1 != 0 {
- return nil, e1
- }
- size := *(*uint32)(unsafe.Pointer(&attrBuf[0]))
-
- // dat is the section of attrBuf that contains valid data,
- // without the 4 byte length header. All attribute offsets
- // are relative to dat.
- dat := attrBuf
- if int(size) < len(attrBuf) {
- dat = dat[:size]
- }
- dat = dat[4:] // remove length prefix
-
- for i := uint32(0); int(i) < len(dat); {
- header := dat[i:]
- if len(header) < 8 {
- return attrs, errorspkg.New("truncated attribute header")
- }
- datOff := *(*int32)(unsafe.Pointer(&header[0]))
- attrLen := *(*uint32)(unsafe.Pointer(&header[4]))
- if datOff < 0 || uint32(datOff)+attrLen > uint32(len(dat)) {
- return attrs, errorspkg.New("truncated results; attrBuf too small")
- }
- end := uint32(datOff) + attrLen
- attrs = append(attrs, dat[datOff:end])
- i = end
- if r := i % 4; r != 0 {
- i += (4 - r)
- }
- }
- return
-}
-
-//sysnb pipe() (r int, w int, err error)
+//sysnb pipe(p *[2]int32) (err error)
func Pipe(p []int) (err error) {
if len(p) != 2 {
return EINVAL
}
- p[0], p[1], err = pipe()
+ var q [2]int32
+ err = pipe(&q)
+ if err == nil {
+ p[0] = int(q[0])
+ p[1] = int(q[1])
+ }
return
}
_p0 = unsafe.Pointer(&buf[0])
bufsize = unsafe.Sizeof(Statfs_t{}) * uintptr(len(buf))
}
- r0, _, e1 := Syscall(SYS_GETFSSTAT64, uintptr(_p0), bufsize, uintptr(flags))
+ r0, _, e1 := syscall(abi.FuncPCABI0(libc_getfsstat_trampoline), uintptr(_p0), bufsize, uintptr(flags))
n = int(r0)
if e1 != 0 {
err = e1
return
}
-func setattrlistTimes(path string, times []Timespec) error {
- _p0, err := BytePtrFromString(path)
- if err != nil {
- return err
- }
+func libc_getfsstat_trampoline()
- var attrList attrList
- attrList.bitmapCount = attrBitMapCount
- attrList.CommonAttr = attrCmnModtime | attrCmnAcctime
-
- // order is mtime, atime: the opposite of Chtimes
- attributes := [2]Timespec{times[1], times[0]}
- const options = 0
- _, _, e1 := Syscall6(
- SYS_SETATTRLIST,
- uintptr(unsafe.Pointer(_p0)),
- uintptr(unsafe.Pointer(&attrList)),
- uintptr(unsafe.Pointer(&attributes)),
- uintptr(unsafe.Sizeof(attributes)),
- uintptr(options),
- 0,
- )
- if e1 != 0 {
- return e1
- }
- return nil
-}
+//go:cgo_import_dynamic libc_getfsstat getfsstat "/usr/lib/libSystem.B.dylib"
-func utimensat(dirfd int, path string, times *[2]Timespec, flag int) error {
- // Darwin doesn't support SYS_UTIMENSAT
- return ENOSYS
-}
+//sys utimensat(dirfd int, path string, times *[2]Timespec, flags int) (err error)
/*
* Wrapped
//sys Chown(path string, uid int, gid int) (err error)
//sys Chroot(path string) (err error)
//sys Close(fd int) (err error)
+//sys closedir(dir uintptr) (err error)
//sys Dup(fd int) (nfd int, err error)
//sys Dup2(from int, to int) (err error)
//sys Exchangedata(path1 string, path2 string, options int) (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_FSTAT64
-//sys Fstatfs(fd int, stat *Statfs_t) (err error) = SYS_FSTATFS64
//sys Fsync(fd int) (err error)
+// Fsync is not called for os.File.Sync(). Please see internal/poll/fd_fsync_darwin.go
//sys Ftruncate(fd int, length int64) (err error)
-//sys Getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error) = SYS_GETDIRENTRIES64
//sys Getdtablesize() (size int)
//sysnb Getegid() (egid int)
//sysnb Geteuid() (uid int)
//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 Lstat(path string, stat *Stat_t) (err error) = SYS_LSTAT64
//sys Mkdir(path string, mode uint32) (err error)
//sys Mkfifo(path string, mode uint32) (err error)
//sys Mknod(path string, mode uint32, dev int) (err error)
//sys Mlock(b []byte) (err error)
//sys Mlockall(flags int) (err error)
//sys Mprotect(b []byte, prot int) (err error)
+//sys msync(b []byte, flags int) (err error)
//sys Munlock(b []byte) (err error)
//sys Munlockall() (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 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 readdir_r(dir uintptr, entry *Dirent, result **Dirent) (res Errno)
//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 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)
//sys Setegid(egid int) (err error)
//sysnb Seteuid(euid int) (err error)
//sys Setprivexec(flag 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 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 Stat(path string, stat *Stat_t) (err error) = SYS_STAT64
-//sys Statfs(path string, stat *Statfs_t) (err error) = SYS_STATFS64
//sys Symlink(path string, link string) (err error)
//sys Sync() (err error)
//sys Truncate(path string, length int64) (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 writev(fd int, iovecs []Iovec) (cnt uintptr, 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
+//sysnb fork() (pid int, err error)
+//sysnb execve(path *byte, argv **byte, envp **byte) (err error)
+//sysnb exit(res int) (err error)
+//sys sysctl(mib []_C_int, old *byte, oldlen *uintptr, new *byte, newlen uintptr) (err error)
+//sys unlinkat(fd int, path string, flags int) (err error)
+//sys openat(fd int, path string, flags int, perm uint32) (fdret int, err error)
+//sys getcwd(buf []byte) (n int, err error)
+
+func init() {
+ execveDarwin = execve
+}
+
+func fdopendir(fd int) (dir uintptr, err error) {
+ r0, _, e1 := syscallPtr(abi.FuncPCABI0(libc_fdopendir_trampoline), uintptr(fd), 0, 0)
+ dir = r0
+ if e1 != 0 {
+ err = errnoErr(e1)
+ }
+ return
+}
+
+func libc_fdopendir_trampoline()
+
+//go:cgo_import_dynamic libc_fdopendir fdopendir "/usr/lib/libSystem.B.dylib"
+
+func readlen(fd int, buf *byte, nbuf int) (n int, err error) {
+ r0, _, e1 := syscall(abi.FuncPCABI0(libc_read_trampoline), uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf))
+ n = int(r0)
+ if e1 != 0 {
+ err = errnoErr(e1)
+ }
+ return
+}
+
+func Getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error) {
+ // Simulate Getdirentries using fdopendir/readdir_r/closedir.
+ // We store the number of entries to skip in the seek
+ // offset of fd. See issue #31368.
+ // It's not the full required semantics, but should handle the case
+ // of calling Getdirentries or ReadDirent repeatedly.
+ // It won't handle assigning the results of lseek to *basep, or handle
+ // the directory being edited underfoot.
+ skip, err := Seek(fd, 0, 1 /* SEEK_CUR */)
+ if err != nil {
+ return 0, err
+ }
+
+ // We need to duplicate the incoming file descriptor
+ // because the caller expects to retain control of it, but
+ // fdopendir expects to take control of its argument.
+ // Just Dup'ing the file descriptor is not enough, as the
+ // result shares underlying state. Use openat to make a really
+ // new file descriptor referring to the same directory.
+ fd2, err := openat(fd, ".", O_RDONLY, 0)
+ if err != nil {
+ return 0, err
+ }
+ d, err := fdopendir(fd2)
+ if err != nil {
+ Close(fd2)
+ return 0, err
+ }
+ defer closedir(d)
+
+ var cnt int64
+ for {
+ var entry Dirent
+ var entryp *Dirent
+ e := readdir_r(d, &entry, &entryp)
+ if e != 0 {
+ return n, errnoErr(e)
+ }
+ if entryp == nil {
+ break
+ }
+ if skip > 0 {
+ skip--
+ cnt++
+ continue
+ }
+ reclen := int(entry.Reclen)
+ if reclen > len(buf) {
+ // Not enough room. Return for now.
+ // The counter will let us know where we should start up again.
+ // Note: this strategy for suspending in the middle and
+ // restarting is O(n^2) in the length of the directory. Oh well.
+ break
+ }
+ // Copy entry into return buffer.
+ copy(buf, unsafe.Slice((*byte)(unsafe.Pointer(&entry)), reclen))
+ buf = buf[reclen:]
+ n += reclen
+ cnt++
+ }
+ // Set the seek offset of the input fd to record
+ // how many files we've already returned.
+ _, err = Seek(fd, cnt, 0 /* SEEK_SET */)
+ if err != nil {
+ return n, err
+ }
+
+ return n, nil
+}
+
+// Implemented in the runtime package (runtime/sys_darwin.go)
+func syscall(fn, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno)
+func syscall6(fn, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err Errno)
+func syscall6X(fn, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err Errno)
+func rawSyscall(fn, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno)
+func rawSyscall6(fn, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err Errno)
+func syscallPtr(fn, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno)