mirror of
https://github.com/cwinfo/matterbridge.git
synced 2024-11-22 21:50:28 +00:00
362 lines
7.0 KiB
Go
362 lines
7.0 KiB
Go
// Copyright 2011 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.
|
|
|
|
// Plan 9 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.
|
|
|
|
package plan9
|
|
|
|
import (
|
|
"bytes"
|
|
"syscall"
|
|
"unsafe"
|
|
)
|
|
|
|
// A Note is a string describing a process note.
|
|
// It implements the os.Signal interface.
|
|
type Note string
|
|
|
|
func (n Note) Signal() {}
|
|
|
|
func (n Note) String() string {
|
|
return string(n)
|
|
}
|
|
|
|
var (
|
|
Stdin = 0
|
|
Stdout = 1
|
|
Stderr = 2
|
|
)
|
|
|
|
// For testing: clients can set this flag to force
|
|
// creation of IPv6 sockets to return EAFNOSUPPORT.
|
|
var SocketDisableIPv6 bool
|
|
|
|
func Syscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err syscall.ErrorString)
|
|
func Syscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err syscall.ErrorString)
|
|
func RawSyscall(trap, a1, a2, a3 uintptr) (r1, r2, err uintptr)
|
|
func RawSyscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr)
|
|
|
|
func atoi(b []byte) (n uint) {
|
|
n = 0
|
|
for i := 0; i < len(b); i++ {
|
|
n = n*10 + uint(b[i]-'0')
|
|
}
|
|
return
|
|
}
|
|
|
|
func cstring(s []byte) string {
|
|
i := bytes.IndexByte(s, 0)
|
|
if i == -1 {
|
|
i = len(s)
|
|
}
|
|
return string(s[:i])
|
|
}
|
|
|
|
func errstr() string {
|
|
var buf [ERRMAX]byte
|
|
|
|
RawSyscall(SYS_ERRSTR, uintptr(unsafe.Pointer(&buf[0])), uintptr(len(buf)), 0)
|
|
|
|
buf[len(buf)-1] = 0
|
|
return cstring(buf[:])
|
|
}
|
|
|
|
// Implemented in assembly to import from runtime.
|
|
func exit(code int)
|
|
|
|
func Exit(code int) { exit(code) }
|
|
|
|
func readnum(path string) (uint, error) {
|
|
var b [12]byte
|
|
|
|
fd, e := Open(path, O_RDONLY)
|
|
if e != nil {
|
|
return 0, e
|
|
}
|
|
defer Close(fd)
|
|
|
|
n, e := Pread(fd, b[:], 0)
|
|
|
|
if e != nil {
|
|
return 0, e
|
|
}
|
|
|
|
m := 0
|
|
for ; m < n && b[m] == ' '; m++ {
|
|
}
|
|
|
|
return atoi(b[m : n-1]), nil
|
|
}
|
|
|
|
func Getpid() (pid int) {
|
|
n, _ := readnum("#c/pid")
|
|
return int(n)
|
|
}
|
|
|
|
func Getppid() (ppid int) {
|
|
n, _ := readnum("#c/ppid")
|
|
return int(n)
|
|
}
|
|
|
|
func Read(fd int, p []byte) (n int, err error) {
|
|
return Pread(fd, p, -1)
|
|
}
|
|
|
|
func Write(fd int, p []byte) (n int, err error) {
|
|
return Pwrite(fd, p, -1)
|
|
}
|
|
|
|
var ioSync int64
|
|
|
|
//sys fd2path(fd int, buf []byte) (err error)
|
|
|
|
func Fd2path(fd int) (path string, err error) {
|
|
var buf [512]byte
|
|
|
|
e := fd2path(fd, buf[:])
|
|
if e != nil {
|
|
return "", e
|
|
}
|
|
return cstring(buf[:]), nil
|
|
}
|
|
|
|
//sys pipe(p *[2]int32) (err error)
|
|
|
|
func Pipe(p []int) (err error) {
|
|
if len(p) != 2 {
|
|
return syscall.ErrorString("bad arg in system call")
|
|
}
|
|
var pp [2]int32
|
|
err = pipe(&pp)
|
|
if err == nil {
|
|
p[0] = int(pp[0])
|
|
p[1] = int(pp[1])
|
|
}
|
|
return
|
|
}
|
|
|
|
// Underlying system call writes to newoffset via pointer.
|
|
// Implemented in assembly to avoid allocation.
|
|
func seek(placeholder uintptr, fd int, offset int64, whence int) (newoffset int64, err string)
|
|
|
|
func Seek(fd int, offset int64, whence int) (newoffset int64, err error) {
|
|
newoffset, e := seek(0, fd, offset, whence)
|
|
|
|
if newoffset == -1 {
|
|
err = syscall.ErrorString(e)
|
|
}
|
|
return
|
|
}
|
|
|
|
func Mkdir(path string, mode uint32) (err error) {
|
|
fd, err := Create(path, O_RDONLY, DMDIR|mode)
|
|
|
|
if fd != -1 {
|
|
Close(fd)
|
|
}
|
|
|
|
return
|
|
}
|
|
|
|
type Waitmsg struct {
|
|
Pid int
|
|
Time [3]uint32
|
|
Msg string
|
|
}
|
|
|
|
func (w Waitmsg) Exited() bool { return true }
|
|
func (w Waitmsg) Signaled() bool { return false }
|
|
|
|
func (w Waitmsg) ExitStatus() int {
|
|
if len(w.Msg) == 0 {
|
|
// a normal exit returns no message
|
|
return 0
|
|
}
|
|
return 1
|
|
}
|
|
|
|
//sys await(s []byte) (n int, err error)
|
|
|
|
func Await(w *Waitmsg) (err error) {
|
|
var buf [512]byte
|
|
var f [5][]byte
|
|
|
|
n, err := await(buf[:])
|
|
|
|
if err != nil || w == nil {
|
|
return
|
|
}
|
|
|
|
nf := 0
|
|
p := 0
|
|
for i := 0; i < n && nf < len(f)-1; i++ {
|
|
if buf[i] == ' ' {
|
|
f[nf] = buf[p:i]
|
|
p = i + 1
|
|
nf++
|
|
}
|
|
}
|
|
f[nf] = buf[p:]
|
|
nf++
|
|
|
|
if nf != len(f) {
|
|
return syscall.ErrorString("invalid wait message")
|
|
}
|
|
w.Pid = int(atoi(f[0]))
|
|
w.Time[0] = uint32(atoi(f[1]))
|
|
w.Time[1] = uint32(atoi(f[2]))
|
|
w.Time[2] = uint32(atoi(f[3]))
|
|
w.Msg = cstring(f[4])
|
|
if w.Msg == "''" {
|
|
// await() returns '' for no error
|
|
w.Msg = ""
|
|
}
|
|
return
|
|
}
|
|
|
|
func Unmount(name, old string) (err error) {
|
|
fixwd()
|
|
oldp, err := BytePtrFromString(old)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
oldptr := uintptr(unsafe.Pointer(oldp))
|
|
|
|
var r0 uintptr
|
|
var e syscall.ErrorString
|
|
|
|
// bind(2) man page: If name is zero, everything bound or mounted upon old is unbound or unmounted.
|
|
if name == "" {
|
|
r0, _, e = Syscall(SYS_UNMOUNT, _zero, oldptr, 0)
|
|
} else {
|
|
namep, err := BytePtrFromString(name)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
r0, _, e = Syscall(SYS_UNMOUNT, uintptr(unsafe.Pointer(namep)), oldptr, 0)
|
|
}
|
|
|
|
if int32(r0) == -1 {
|
|
err = e
|
|
}
|
|
return
|
|
}
|
|
|
|
func Fchdir(fd int) (err error) {
|
|
path, err := Fd2path(fd)
|
|
|
|
if err != nil {
|
|
return
|
|
}
|
|
|
|
return Chdir(path)
|
|
}
|
|
|
|
type Timespec struct {
|
|
Sec int32
|
|
Nsec int32
|
|
}
|
|
|
|
type Timeval struct {
|
|
Sec int32
|
|
Usec int32
|
|
}
|
|
|
|
func NsecToTimeval(nsec int64) (tv Timeval) {
|
|
nsec += 999 // round up to microsecond
|
|
tv.Usec = int32(nsec % 1e9 / 1e3)
|
|
tv.Sec = int32(nsec / 1e9)
|
|
return
|
|
}
|
|
|
|
func nsec() int64 {
|
|
var scratch int64
|
|
|
|
r0, _, _ := Syscall(SYS_NSEC, uintptr(unsafe.Pointer(&scratch)), 0, 0)
|
|
// TODO(aram): remove hack after I fix _nsec in the pc64 kernel.
|
|
if r0 == 0 {
|
|
return scratch
|
|
}
|
|
return int64(r0)
|
|
}
|
|
|
|
func Gettimeofday(tv *Timeval) error {
|
|
nsec := nsec()
|
|
*tv = NsecToTimeval(nsec)
|
|
return nil
|
|
}
|
|
|
|
func Getpagesize() int { return 0x1000 }
|
|
|
|
func Getegid() (egid int) { return -1 }
|
|
func Geteuid() (euid int) { return -1 }
|
|
func Getgid() (gid int) { return -1 }
|
|
func Getuid() (uid int) { return -1 }
|
|
|
|
func Getgroups() (gids []int, err error) {
|
|
return make([]int, 0), nil
|
|
}
|
|
|
|
//sys open(path string, mode int) (fd int, err error)
|
|
|
|
func Open(path string, mode int) (fd int, err error) {
|
|
fixwd()
|
|
return open(path, mode)
|
|
}
|
|
|
|
//sys create(path string, mode int, perm uint32) (fd int, err error)
|
|
|
|
func Create(path string, mode int, perm uint32) (fd int, err error) {
|
|
fixwd()
|
|
return create(path, mode, perm)
|
|
}
|
|
|
|
//sys remove(path string) (err error)
|
|
|
|
func Remove(path string) error {
|
|
fixwd()
|
|
return remove(path)
|
|
}
|
|
|
|
//sys stat(path string, edir []byte) (n int, err error)
|
|
|
|
func Stat(path string, edir []byte) (n int, err error) {
|
|
fixwd()
|
|
return stat(path, edir)
|
|
}
|
|
|
|
//sys bind(name string, old string, flag int) (err error)
|
|
|
|
func Bind(name string, old string, flag int) (err error) {
|
|
fixwd()
|
|
return bind(name, old, flag)
|
|
}
|
|
|
|
//sys mount(fd int, afd int, old string, flag int, aname string) (err error)
|
|
|
|
func Mount(fd int, afd int, old string, flag int, aname string) (err error) {
|
|
fixwd()
|
|
return mount(fd, afd, old, flag, aname)
|
|
}
|
|
|
|
//sys wstat(path string, edir []byte) (err error)
|
|
|
|
func Wstat(path string, edir []byte) (err error) {
|
|
fixwd()
|
|
return wstat(path, edir)
|
|
}
|
|
|
|
//sys chdir(path string) (err error)
|
|
//sys Dup(oldfd int, newfd int) (fd 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 Close(fd int) (err error)
|
|
//sys Fstat(fd int, edir []byte) (n int, err error)
|
|
//sys Fwstat(fd int, edir []byte) (err error)
|