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Diffstat (limited to '')
-rw-r--r-- | dependencies/pkg/mod/golang.org/x/sys@v0.1.0/plan9/syscall_plan9.go | 361 |
1 files changed, 361 insertions, 0 deletions
diff --git a/dependencies/pkg/mod/golang.org/x/sys@v0.1.0/plan9/syscall_plan9.go b/dependencies/pkg/mod/golang.org/x/sys@v0.1.0/plan9/syscall_plan9.go new file mode 100644 index 0000000..d079d81 --- /dev/null +++ b/dependencies/pkg/mod/golang.org/x/sys@v0.1.0/plan9/syscall_plan9.go @@ -0,0 +1,361 @@ +// 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) |