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(
- funcPC(libc_getattrlist_trampoline),
- 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
-}
-
-func libc_getattrlist_trampoline()
-
-//go:linkname libc_getattrlist libc_getattrlist
-//go:cgo_import_dynamic libc_getattrlist getattrlist "/usr/lib/libSystem.B.dylib"
-
//sysnb pipe(p *[2]int32) (err error)
func Pipe(p []int) (err error) {
}
var q [2]int32
err = pipe(&q)
- p[0] = int(q[0])
- p[1] = int(q[1])
+ 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(funcPC(libc_getfsstat64_trampoline), 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 libc_getfsstat64_trampoline()
-
-//go:linkname libc_getfsstat64 libc_getfsstat64
-//go:cgo_import_dynamic libc_getfsstat64 getfsstat64 "/usr/lib/libSystem.B.dylib"
-
-func setattrlistTimes(path string, times []Timespec) error {
- _p0, err := BytePtrFromString(path)
- if err != nil {
- return err
- }
-
- 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(
- funcPC(libc_setattrlist_trampoline),
- 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
-}
-
-func libc_setattrlist_trampoline()
+func libc_getfsstat_trampoline()
-//go:linkname libc_setattrlist libc_setattrlist
-//go:cgo_import_dynamic libc_setattrlist setattrlist "/usr/lib/libSystem.B.dylib"
+//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 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 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)
//sysnb fork() (pid int, err error)
-//sysnb ioctl(fd int, req int, arg int) (err error)
-//sysnb execve(path *byte, argv *byte, envp *byte) (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 readlen(fd int, buf *byte, nbuf int) (n int, err error) {
- r0, _, e1 := syscall(funcPC(libc_read_trampoline), uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf))
- n = int(r0)
+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 writelen(fd int, buf *byte, nbuf int) (n int, err error) {
- r0, _, e1 := syscall(funcPC(libc_write_trampoline), uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf))
+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)
-
-// Find the entry point for f. See comments in runtime/proc.go for the
-// function of the same name.
-//go:nosplit
-func funcPC(f func()) uintptr {
- return **(**uintptr)(unsafe.Pointer(&f))
-}
+func syscallPtr(fn, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno)