diff options
Diffstat (limited to 'vendor/golang.org/x/sys/unix/syscall_zos_s390x.go')
| -rw-r--r-- | vendor/golang.org/x/sys/unix/syscall_zos_s390x.go | 216 |
1 files changed, 183 insertions, 33 deletions
diff --git a/vendor/golang.org/x/sys/unix/syscall_zos_s390x.go b/vendor/golang.org/x/sys/unix/syscall_zos_s390x.go index 1ffd8bf..4596d04 100644 --- a/vendor/golang.org/x/sys/unix/syscall_zos_s390x.go +++ b/vendor/golang.org/x/sys/unix/syscall_zos_s390x.go @@ -9,8 +9,10 @@ package unix import ( "bytes" + "fmt" "runtime" "sort" + "strings" "sync" "syscall" "unsafe" @@ -55,7 +57,13 @@ func (d *Dirent) NameString() string { if d == nil { return "" } - return string(d.Name[:d.Namlen]) + s := string(d.Name[:]) + idx := strings.IndexByte(s, 0) + if idx == -1 { + return s + } else { + return s[:idx] + } } func (sa *SockaddrInet4) sockaddr() (unsafe.Pointer, _Socklen, error) { @@ -67,9 +75,7 @@ func (sa *SockaddrInet4) sockaddr() (unsafe.Pointer, _Socklen, error) { p := (*[2]byte)(unsafe.Pointer(&sa.raw.Port)) p[0] = byte(sa.Port >> 8) p[1] = byte(sa.Port) - for i := 0; i < len(sa.Addr); i++ { - sa.raw.Addr[i] = sa.Addr[i] - } + sa.raw.Addr = sa.Addr return unsafe.Pointer(&sa.raw), _Socklen(sa.raw.Len), nil } @@ -83,9 +89,7 @@ func (sa *SockaddrInet6) sockaddr() (unsafe.Pointer, _Socklen, error) { p[0] = byte(sa.Port >> 8) p[1] = byte(sa.Port) sa.raw.Scope_id = sa.ZoneId - for i := 0; i < len(sa.Addr); i++ { - sa.raw.Addr[i] = sa.Addr[i] - } + sa.raw.Addr = sa.Addr return unsafe.Pointer(&sa.raw), _Socklen(sa.raw.Len), nil } @@ -135,8 +139,7 @@ func anyToSockaddr(_ int, rsa *RawSockaddrAny) (Sockaddr, error) { for n < int(pp.Len) && pp.Path[n] != 0 { n++ } - bytes := (*[len(pp.Path)]byte)(unsafe.Pointer(&pp.Path[0]))[0:n] - sa.Name = string(bytes) + sa.Name = string(unsafe.Slice((*byte)(unsafe.Pointer(&pp.Path[0])), n)) return sa, nil case AF_INET: @@ -144,9 +147,7 @@ func anyToSockaddr(_ int, rsa *RawSockaddrAny) (Sockaddr, error) { sa := new(SockaddrInet4) p := (*[2]byte)(unsafe.Pointer(&pp.Port)) sa.Port = int(p[0])<<8 + int(p[1]) - for i := 0; i < len(sa.Addr); i++ { - sa.Addr[i] = pp.Addr[i] - } + sa.Addr = pp.Addr return sa, nil case AF_INET6: @@ -155,9 +156,7 @@ func anyToSockaddr(_ int, rsa *RawSockaddrAny) (Sockaddr, error) { p := (*[2]byte)(unsafe.Pointer(&pp.Port)) sa.Port = int(p[0])<<8 + int(p[1]) sa.ZoneId = pp.Scope_id - for i := 0; i < len(sa.Addr); i++ { - sa.Addr[i] = pp.Addr[i] - } + sa.Addr = pp.Addr return sa, nil } return nil, EAFNOSUPPORT @@ -193,7 +192,6 @@ func (cmsg *Cmsghdr) SetLen(length int) { //sys fcntl(fd int, cmd int, arg int) (val int, err error) //sys read(fd int, p []byte) (n int, err error) -//sys readlen(fd int, buf *byte, nbuf int) (n int, err error) = SYS_READ //sys write(fd int, p []byte) (n int, err error) //sys accept(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (fd int, err error) = SYS___ACCEPT_A @@ -213,7 +211,8 @@ func (cmsg *Cmsghdr) SetLen(length int) { //sys sendmsg(s int, msg *Msghdr, flags int) (n int, err error) = SYS___SENDMSG_A //sys mmap(addr uintptr, length uintptr, prot int, flag int, fd int, pos int64) (ret uintptr, err error) = SYS_MMAP //sys munmap(addr uintptr, length uintptr) (err error) = SYS_MUNMAP -//sys ioctl(fd int, req uint, arg uintptr) (err error) = SYS_IOCTL +//sys ioctl(fd int, req int, arg uintptr) (err error) = SYS_IOCTL +//sys ioctlPtr(fd int, req int, arg unsafe.Pointer) (err error) = SYS_IOCTL //sys Access(path string, mode uint32) (err error) = SYS___ACCESS_A //sys Chdir(path string) (err error) = SYS___CHDIR_A @@ -285,25 +284,11 @@ func Close(fd int) (err error) { return } -var mapper = &mmapper{ - active: make(map[*byte][]byte), - mmap: mmap, - munmap: munmap, -} - // Dummy function: there are no semantics for Madvise on z/OS func Madvise(b []byte, advice int) (err error) { return } -func Mmap(fd int, offset int64, length int, prot int, flags int) (data []byte, err error) { - return mapper.Mmap(fd, offset, length, prot, flags) -} - -func Munmap(b []byte) (err error) { - return mapper.Munmap(b) -} - //sys Gethostname(buf []byte) (err error) = SYS___GETHOSTNAME_A //sysnb Getegid() (egid int) //sysnb Geteuid() (uid int) @@ -587,8 +572,10 @@ func Pipe(p []int) (err error) { } var pp [2]_C_int err = pipe(&pp) - p[0] = int(pp[0]) - p[1] = int(pp[1]) + if err == nil { + p[0] = int(pp[0]) + p[1] = int(pp[1]) + } return } @@ -1236,6 +1223,14 @@ func Readdir(dir uintptr) (*Dirent, error) { return &ent, err } +func readdir_r(dirp uintptr, entry *direntLE, result **direntLE) (err error) { + r0, _, e1 := syscall_syscall(SYS___READDIR_R_A, dirp, uintptr(unsafe.Pointer(entry)), uintptr(unsafe.Pointer(result))) + if int64(r0) == -1 { + err = errnoErr(Errno(e1)) + } + return +} + func Closedir(dir uintptr) error { _, _, e := syscall_syscall(SYS_CLOSEDIR, dir, 0, 0) if e != 0 { @@ -1827,3 +1822,158 @@ func Unmount(name string, mtm int) (err error) { } return err } + +func fdToPath(dirfd int) (path string, err error) { + var buffer [1024]byte + // w_ctrl() + ret := runtime.CallLeFuncByPtr(runtime.XplinkLibvec+SYS_W_IOCTL<<4, + []uintptr{uintptr(dirfd), 17, 1024, uintptr(unsafe.Pointer(&buffer[0]))}) + if ret == 0 { + zb := bytes.IndexByte(buffer[:], 0) + if zb == -1 { + zb = len(buffer) + } + // __e2a_l() + runtime.CallLeFuncByPtr(runtime.XplinkLibvec+SYS___E2A_L<<4, + []uintptr{uintptr(unsafe.Pointer(&buffer[0])), uintptr(zb)}) + return string(buffer[:zb]), nil + } + // __errno() + errno := int(*(*int32)(unsafe.Pointer(runtime.CallLeFuncByPtr(runtime.XplinkLibvec+SYS___ERRNO<<4, + []uintptr{})))) + // __errno2() + errno2 := int(runtime.CallLeFuncByPtr(runtime.XplinkLibvec+SYS___ERRNO2<<4, + []uintptr{})) + // strerror_r() + ret = runtime.CallLeFuncByPtr(runtime.XplinkLibvec+SYS_STRERROR_R<<4, + []uintptr{uintptr(errno), uintptr(unsafe.Pointer(&buffer[0])), 1024}) + if ret == 0 { + zb := bytes.IndexByte(buffer[:], 0) + if zb == -1 { + zb = len(buffer) + } + return "", fmt.Errorf("%s (errno2=0x%x)", buffer[:zb], errno2) + } else { + return "", fmt.Errorf("fdToPath errno %d (errno2=0x%x)", errno, errno2) + } +} + +func direntLeToDirentUnix(dirent *direntLE, dir uintptr, path string) (Dirent, error) { + var d Dirent + + d.Ino = uint64(dirent.Ino) + offset, err := Telldir(dir) + if err != nil { + return d, err + } + + d.Off = int64(offset) + s := string(bytes.Split(dirent.Name[:], []byte{0})[0]) + copy(d.Name[:], s) + + d.Reclen = uint16(24 + len(d.NameString())) + var st Stat_t + path = path + "/" + s + err = Lstat(path, &st) + if err != nil { + return d, err + } + + d.Type = uint8(st.Mode >> 24) + return d, err +} + +func Getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error) { + // Simulation of Getdirentries port from the Darwin implementation. + // COMMENTS FROM DARWIN: + // 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 + } + + // Get path from fd to avoid unavailable call (fdopendir) + path, err := fdToPath(fd) + if err != nil { + return 0, err + } + d, err := Opendir(path) + if err != nil { + return 0, err + } + defer Closedir(d) + + var cnt int64 + for { + var entryLE direntLE + var entrypLE *direntLE + e := readdir_r(d, &entryLE, &entrypLE) + if e != nil { + return n, e + } + if entrypLE == nil { + break + } + if skip > 0 { + skip-- + cnt++ + continue + } + + // Dirent on zos has a different structure + entry, e := direntLeToDirentUnix(&entryLE, d, path) + if e != nil { + return n, e + } + + 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. + s := unsafe.Slice((*byte)(unsafe.Pointer(&entry)), reclen) + copy(buf, s) + + 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 +} + +func ReadDirent(fd int, buf []byte) (n int, err error) { + var base = (*uintptr)(unsafe.Pointer(new(uint64))) + return Getdirentries(fd, buf, base) +} + +func direntIno(buf []byte) (uint64, bool) { + return readInt(buf, unsafe.Offsetof(Dirent{}.Ino), unsafe.Sizeof(Dirent{}.Ino)) +} + +func direntReclen(buf []byte) (uint64, bool) { + return readInt(buf, unsafe.Offsetof(Dirent{}.Reclen), unsafe.Sizeof(Dirent{}.Reclen)) +} + +func direntNamlen(buf []byte) (uint64, bool) { + reclen, ok := direntReclen(buf) + if !ok { + return 0, false + } + return reclen - uint64(unsafe.Offsetof(Dirent{}.Name)), true +} |