Golang程序
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313行
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7.03 KB
// Copyright 2013 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.
package syscall
import (
"sync"
"unsafe"
)
//sys naclClose(fd int) (err error) = sys_close
//sys Exit(code int) (err error)
//sys naclFstat(fd int, stat *Stat_t) (err error) = sys_fstat
//sys naclRead(fd int, b []byte) (n int, err error) = sys_read
//sys naclSeek(fd int, off *int64, whence int) (err error) = sys_lseek
//sys naclGetRandomBytes(b []byte) (err error) = sys_get_random_bytes
const direntSize = 8 + 8 + 2 + 256
// native_client/src/trusted/service_runtime/include/sys/dirent.h
type Dirent struct {
Ino int64
Off int64
Reclen uint16
Name [256]byte
}
func ParseDirent(buf []byte, max int, names []string) (consumed int, count int, newnames []string) {
origlen := len(buf)
count = 0
for max != 0 && len(buf) > 0 {
dirent := (*Dirent)(unsafe.Pointer(&buf[0]))
buf = buf[dirent.Reclen:]
if dirent.Ino == 0 { // File absent in directory.
continue
}
bytes := (*[512 + PathMax]byte)(unsafe.Pointer(&dirent.Name[0]))
var name = string(bytes[0:clen(bytes[:])])
if name == "." || name == ".." { // Useless names
continue
}
max--
count++
names = append(names, name)
}
return origlen - len(buf), count, names
}
func clen(n []byte) int {
for i := 0; i < len(n); i++ {
if n[i] == 0 {
return i
}
}
return len(n)
}
const PathMax = 256
// An Errno is an unsigned number describing an error condition.
// It implements the error interface. The zero Errno is by convention
// a non-error, so code to convert from Errno to error should use:
// err = nil
// if errno != 0 {
// err = errno
// }
type Errno uintptr
func (e Errno) Error() string {
if 0 <= int(e) && int(e) < len(errorstr) {
s := errorstr[e]
if s != "" {
return s
}
}
return "errno " + itoa(int(e))
}
func (e Errno) Temporary() bool {
return e == EINTR || e == EMFILE || e.Timeout()
}
func (e Errno) Timeout() bool {
return e == EAGAIN || e == EWOULDBLOCK || e == ETIMEDOUT
}
// A Signal is a number describing a process signal.
// It implements the os.Signal interface.
type Signal int
const (
_ Signal = iota
SIGCHLD
SIGINT
SIGKILL
SIGTRAP
SIGQUIT
)
func (s Signal) Signal() {}
func (s Signal) String() string {
if 0 <= s && int(s) < len(signals) {
str := signals[s]
if str != "" {
return str
}
}
return "signal " + itoa(int(s))
}
var signals = [...]string{}
// File system
const (
Stdin = 0
Stdout = 1
Stderr = 2
)
// native_client/src/trusted/service_runtime/include/sys/fcntl.h
const (
O_RDONLY = 0
O_WRONLY = 1
O_RDWR = 2
O_ACCMODE = 3
O_CREAT = 0100
O_CREATE = O_CREAT // for ken
O_TRUNC = 01000
O_APPEND = 02000
O_EXCL = 0200
O_NONBLOCK = 04000
O_NDELAY = O_NONBLOCK
O_SYNC = 010000
O_FSYNC = O_SYNC
O_ASYNC = 020000
O_CLOEXEC = 0
FD_CLOEXEC = 1
)
// native_client/src/trusted/service_runtime/include/sys/fcntl.h
const (
F_DUPFD = 0
F_GETFD = 1
F_SETFD = 2
F_GETFL = 3
F_SETFL = 4
F_GETOWN = 5
F_SETOWN = 6
F_GETLK = 7
F_SETLK = 8
F_SETLKW = 9
F_RGETLK = 10
F_RSETLK = 11
F_CNVT = 12
F_RSETLKW = 13
F_RDLCK = 1
F_WRLCK = 2
F_UNLCK = 3
F_UNLKSYS = 4
)
// native_client/src/trusted/service_runtime/include/bits/stat.h
const (
S_IFMT = 0000370000
S_IFSHM_SYSV = 0000300000
S_IFSEMA = 0000270000
S_IFCOND = 0000260000
S_IFMUTEX = 0000250000
S_IFSHM = 0000240000
S_IFBOUNDSOCK = 0000230000
S_IFSOCKADDR = 0000220000
S_IFDSOCK = 0000210000
S_IFSOCK = 0000140000
S_IFLNK = 0000120000
S_IFREG = 0000100000
S_IFBLK = 0000060000
S_IFDIR = 0000040000
S_IFCHR = 0000020000
S_IFIFO = 0000010000
S_UNSUP = 0000370000
S_ISUID = 0004000
S_ISGID = 0002000
S_ISVTX = 0001000
S_IREAD = 0400
S_IWRITE = 0200
S_IEXEC = 0100
S_IRWXU = 0700
S_IRUSR = 0400
S_IWUSR = 0200
S_IXUSR = 0100
S_IRWXG = 070
S_IRGRP = 040
S_IWGRP = 020
S_IXGRP = 010
S_IRWXO = 07
S_IROTH = 04
S_IWOTH = 02
S_IXOTH = 01
)
// native_client/src/trusted/service_runtime/include/sys/stat.h
// native_client/src/trusted/service_runtime/include/machine/_types.h
type Stat_t struct {
Dev int64
Ino uint64
Mode uint32
Nlink uint32
Uid uint32
Gid uint32
Rdev int64
Size int64
Blksize int32
Blocks int32
Atime int64
AtimeNsec int64
Mtime int64
MtimeNsec int64
Ctime int64
CtimeNsec int64
}
// Processes
// Not supported on NaCl - just enough for package os.
var ForkLock sync.RWMutex
type WaitStatus uint32
func (w WaitStatus) Exited() bool { return false }
func (w WaitStatus) ExitStatus() int { return 0 }
func (w WaitStatus) Signaled() bool { return false }
func (w WaitStatus) Signal() Signal { return 0 }
func (w WaitStatus) CoreDump() bool { return false }
func (w WaitStatus) Stopped() bool { return false }
func (w WaitStatus) Continued() bool { return false }
func (w WaitStatus) StopSignal() Signal { return 0 }
func (w WaitStatus) TrapCause() int { return 0 }
// XXX made up
type Rusage struct {
Utime Timeval
Stime Timeval
}
// XXX made up
type ProcAttr struct {
Dir string
Env []string
Files []uintptr
Sys *SysProcAttr
}
type SysProcAttr struct {
}
// System
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) { return 0, 0, ENOSYS }
func RawSyscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno) { return 0, 0, ENOSYS }
func RawSyscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err Errno) {
return 0, 0, ENOSYS
}
func Sysctl(key string) (string, error) {
if key == "kern.hostname" {
return "naclbox", nil
}
return "", ENOSYS
}
// Unimplemented Unix midden heap.
const ImplementsGetwd = false
func Getwd() (wd string, err error) { return "", ENOSYS }
func Getegid() int { return 1 }
func Geteuid() int { return 1 }
func Getgid() int { return 1 }
func Getgroups() ([]int, error) { return []int{1}, nil }
func Getpagesize() int { return 65536 }
func Getppid() int { return 2 }
func Getpid() int { return 3 }
func Getuid() int { return 1 }
func Kill(pid int, signum Signal) error { return ENOSYS }
func Sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) {
return 0, ENOSYS
}
func StartProcess(argv0 string, argv []string, attr *ProcAttr) (pid int, handle uintptr, err error) {
return 0, 0, ENOSYS
}
func Wait4(pid int, wstatus *WaitStatus, options int, rusage *Rusage) (wpid int, err error) {
return 0, ENOSYS
}
func RouteRIB(facility, param int) ([]byte, error) { return nil, ENOSYS }
func ParseRoutingMessage(b []byte) ([]RoutingMessage, error) { return nil, ENOSYS }
func ParseRoutingSockaddr(msg RoutingMessage) ([]Sockaddr, error) { return nil, ENOSYS }
func SysctlUint32(name string) (value uint32, err error) { return 0, ENOSYS }