Source file src/pkg/cmd/vendor/golang.org/x/sys/unix/syscall_aix.go

     1	// Copyright 2018 The Go Authors. All rights reserved.
     2	// Use of this source code is governed by a BSD-style
     3	// license that can be found in the LICENSE file.
     4	
     5	// +build aix
     6	
     7	// Aix system calls.
     8	// This file is compiled as ordinary Go code,
     9	// but it is also input to mksyscall,
    10	// which parses the //sys lines and generates system call stubs.
    11	// Note that sometimes we use a lowercase //sys name and
    12	// wrap it in our own nicer implementation.
    13	
    14	package unix
    15	
    16	import "unsafe"
    17	
    18	/*
    19	 * Wrapped
    20	 */
    21	
    22	//sys	utimes(path string, times *[2]Timeval) (err error)
    23	func Utimes(path string, tv []Timeval) error {
    24		if len(tv) != 2 {
    25			return EINVAL
    26		}
    27		return utimes(path, (*[2]Timeval)(unsafe.Pointer(&tv[0])))
    28	}
    29	
    30	//sys	utimensat(dirfd int, path string, times *[2]Timespec, flag int) (err error)
    31	func UtimesNano(path string, ts []Timespec) error {
    32		if len(ts) != 2 {
    33			return EINVAL
    34		}
    35		return utimensat(AT_FDCWD, path, (*[2]Timespec)(unsafe.Pointer(&ts[0])), 0)
    36	}
    37	
    38	func UtimesNanoAt(dirfd int, path string, ts []Timespec, flags int) error {
    39		if ts == nil {
    40			return utimensat(dirfd, path, nil, flags)
    41		}
    42		if len(ts) != 2 {
    43			return EINVAL
    44		}
    45		return utimensat(dirfd, path, (*[2]Timespec)(unsafe.Pointer(&ts[0])), flags)
    46	}
    47	
    48	func (sa *SockaddrInet4) sockaddr() (unsafe.Pointer, _Socklen, error) {
    49		if sa.Port < 0 || sa.Port > 0xFFFF {
    50			return nil, 0, EINVAL
    51		}
    52		sa.raw.Family = AF_INET
    53		p := (*[2]byte)(unsafe.Pointer(&sa.raw.Port))
    54		p[0] = byte(sa.Port >> 8)
    55		p[1] = byte(sa.Port)
    56		for i := 0; i < len(sa.Addr); i++ {
    57			sa.raw.Addr[i] = sa.Addr[i]
    58		}
    59		return unsafe.Pointer(&sa.raw), SizeofSockaddrInet4, nil
    60	}
    61	
    62	func (sa *SockaddrInet6) sockaddr() (unsafe.Pointer, _Socklen, error) {
    63		if sa.Port < 0 || sa.Port > 0xFFFF {
    64			return nil, 0, EINVAL
    65		}
    66		sa.raw.Family = AF_INET6
    67		p := (*[2]byte)(unsafe.Pointer(&sa.raw.Port))
    68		p[0] = byte(sa.Port >> 8)
    69		p[1] = byte(sa.Port)
    70		sa.raw.Scope_id = sa.ZoneId
    71		for i := 0; i < len(sa.Addr); i++ {
    72			sa.raw.Addr[i] = sa.Addr[i]
    73		}
    74		return unsafe.Pointer(&sa.raw), SizeofSockaddrInet6, nil
    75	}
    76	
    77	func (sa *SockaddrUnix) sockaddr() (unsafe.Pointer, _Socklen, error) {
    78		name := sa.Name
    79		n := len(name)
    80		if n > len(sa.raw.Path) {
    81			return nil, 0, EINVAL
    82		}
    83		if n == len(sa.raw.Path) && name[0] != '@' {
    84			return nil, 0, EINVAL
    85		}
    86		sa.raw.Family = AF_UNIX
    87		for i := 0; i < n; i++ {
    88			sa.raw.Path[i] = uint8(name[i])
    89		}
    90		// length is family (uint16), name, NUL.
    91		sl := _Socklen(2)
    92		if n > 0 {
    93			sl += _Socklen(n) + 1
    94		}
    95		if sa.raw.Path[0] == '@' {
    96			sa.raw.Path[0] = 0
    97			// Don't count trailing NUL for abstract address.
    98			sl--
    99		}
   100	
   101		return unsafe.Pointer(&sa.raw), sl, nil
   102	}
   103	
   104	func Getsockname(fd int) (sa Sockaddr, err error) {
   105		var rsa RawSockaddrAny
   106		var len _Socklen = SizeofSockaddrAny
   107		if err = getsockname(fd, &rsa, &len); err != nil {
   108			return
   109		}
   110		return anyToSockaddr(fd, &rsa)
   111	}
   112	
   113	//sys	getcwd(buf []byte) (err error)
   114	
   115	const ImplementsGetwd = true
   116	
   117	func Getwd() (ret string, err error) {
   118		for len := uint64(4096); ; len *= 2 {
   119			b := make([]byte, len)
   120			err := getcwd(b)
   121			if err == nil {
   122				i := 0
   123				for b[i] != 0 {
   124					i++
   125				}
   126				return string(b[0:i]), nil
   127			}
   128			if err != ERANGE {
   129				return "", err
   130			}
   131		}
   132	}
   133	
   134	func Getcwd(buf []byte) (n int, err error) {
   135		err = getcwd(buf)
   136		if err == nil {
   137			i := 0
   138			for buf[i] != 0 {
   139				i++
   140			}
   141			n = i + 1
   142		}
   143		return
   144	}
   145	
   146	func Getgroups() (gids []int, err error) {
   147		n, err := getgroups(0, nil)
   148		if err != nil {
   149			return nil, err
   150		}
   151		if n == 0 {
   152			return nil, nil
   153		}
   154	
   155		// Sanity check group count. Max is 16 on BSD.
   156		if n < 0 || n > 1000 {
   157			return nil, EINVAL
   158		}
   159	
   160		a := make([]_Gid_t, n)
   161		n, err = getgroups(n, &a[0])
   162		if err != nil {
   163			return nil, err
   164		}
   165		gids = make([]int, n)
   166		for i, v := range a[0:n] {
   167			gids[i] = int(v)
   168		}
   169		return
   170	}
   171	
   172	func Setgroups(gids []int) (err error) {
   173		if len(gids) == 0 {
   174			return setgroups(0, nil)
   175		}
   176	
   177		a := make([]_Gid_t, len(gids))
   178		for i, v := range gids {
   179			a[i] = _Gid_t(v)
   180		}
   181		return setgroups(len(a), &a[0])
   182	}
   183	
   184	/*
   185	 * Socket
   186	 */
   187	
   188	//sys	accept(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (fd int, err error)
   189	
   190	func Accept(fd int) (nfd int, sa Sockaddr, err error) {
   191		var rsa RawSockaddrAny
   192		var len _Socklen = SizeofSockaddrAny
   193		nfd, err = accept(fd, &rsa, &len)
   194		if nfd == -1 {
   195			return
   196		}
   197		sa, err = anyToSockaddr(fd, &rsa)
   198		if err != nil {
   199			Close(nfd)
   200			nfd = 0
   201		}
   202		return
   203	}
   204	
   205	func Recvmsg(fd int, p, oob []byte, flags int) (n, oobn int, recvflags int, from Sockaddr, err error) {
   206		// Recvmsg not implemented on AIX
   207		sa := new(SockaddrUnix)
   208		return -1, -1, -1, sa, ENOSYS
   209	}
   210	
   211	func Sendmsg(fd int, p, oob []byte, to Sockaddr, flags int) (err error) {
   212		_, err = SendmsgN(fd, p, oob, to, flags)
   213		return
   214	}
   215	
   216	func SendmsgN(fd int, p, oob []byte, to Sockaddr, flags int) (n int, err error) {
   217		// SendmsgN not implemented on AIX
   218		return -1, ENOSYS
   219	}
   220	
   221	func anyToSockaddr(fd int, rsa *RawSockaddrAny) (Sockaddr, error) {
   222		switch rsa.Addr.Family {
   223	
   224		case AF_UNIX:
   225			pp := (*RawSockaddrUnix)(unsafe.Pointer(rsa))
   226			sa := new(SockaddrUnix)
   227	
   228			// Some versions of AIX have a bug in getsockname (see IV78655).
   229			// We can't rely on sa.Len being set correctly.
   230			n := SizeofSockaddrUnix - 3 // subtract leading Family, Len, terminating NUL.
   231			for i := 0; i < n; i++ {
   232				if pp.Path[i] == 0 {
   233					n = i
   234					break
   235				}
   236			}
   237	
   238			bytes := (*[10000]byte)(unsafe.Pointer(&pp.Path[0]))[0:n]
   239			sa.Name = string(bytes)
   240			return sa, nil
   241	
   242		case AF_INET:
   243			pp := (*RawSockaddrInet4)(unsafe.Pointer(rsa))
   244			sa := new(SockaddrInet4)
   245			p := (*[2]byte)(unsafe.Pointer(&pp.Port))
   246			sa.Port = int(p[0])<<8 + int(p[1])
   247			for i := 0; i < len(sa.Addr); i++ {
   248				sa.Addr[i] = pp.Addr[i]
   249			}
   250			return sa, nil
   251	
   252		case AF_INET6:
   253			pp := (*RawSockaddrInet6)(unsafe.Pointer(rsa))
   254			sa := new(SockaddrInet6)
   255			p := (*[2]byte)(unsafe.Pointer(&pp.Port))
   256			sa.Port = int(p[0])<<8 + int(p[1])
   257			sa.ZoneId = pp.Scope_id
   258			for i := 0; i < len(sa.Addr); i++ {
   259				sa.Addr[i] = pp.Addr[i]
   260			}
   261			return sa, nil
   262		}
   263		return nil, EAFNOSUPPORT
   264	}
   265	
   266	func Gettimeofday(tv *Timeval) (err error) {
   267		err = gettimeofday(tv, nil)
   268		return
   269	}
   270	
   271	func Sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) {
   272		if raceenabled {
   273			raceReleaseMerge(unsafe.Pointer(&ioSync))
   274		}
   275		return sendfile(outfd, infd, offset, count)
   276	}
   277	
   278	// TODO
   279	func sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) {
   280		return -1, ENOSYS
   281	}
   282	
   283	//sys	getdirent(fd int, buf []byte) (n int, err error)
   284	func ReadDirent(fd int, buf []byte) (n int, err error) {
   285		return getdirent(fd, buf)
   286	}
   287	
   288	//sys	wait4(pid Pid_t, status *_C_int, options int, rusage *Rusage) (wpid Pid_t, err error)
   289	func Wait4(pid int, wstatus *WaitStatus, options int, rusage *Rusage) (wpid int, err error) {
   290		var status _C_int
   291		var r Pid_t
   292		err = ERESTART
   293		// AIX wait4 may return with ERESTART errno, while the processus is still
   294		// active.
   295		for err == ERESTART {
   296			r, err = wait4(Pid_t(pid), &status, options, rusage)
   297		}
   298		wpid = int(r)
   299		if wstatus != nil {
   300			*wstatus = WaitStatus(status)
   301		}
   302		return
   303	}
   304	
   305	/*
   306	 * Wait
   307	 */
   308	
   309	type WaitStatus uint32
   310	
   311	func (w WaitStatus) Stopped() bool { return w&0x40 != 0 }
   312	func (w WaitStatus) StopSignal() Signal {
   313		if !w.Stopped() {
   314			return -1
   315		}
   316		return Signal(w>>8) & 0xFF
   317	}
   318	
   319	func (w WaitStatus) Exited() bool { return w&0xFF == 0 }
   320	func (w WaitStatus) ExitStatus() int {
   321		if !w.Exited() {
   322			return -1
   323		}
   324		return int((w >> 8) & 0xFF)
   325	}
   326	
   327	func (w WaitStatus) Signaled() bool { return w&0x40 == 0 && w&0xFF != 0 }
   328	func (w WaitStatus) Signal() Signal {
   329		if !w.Signaled() {
   330			return -1
   331		}
   332		return Signal(w>>16) & 0xFF
   333	}
   334	
   335	func (w WaitStatus) Continued() bool { return w&0x01000000 != 0 }
   336	
   337	func (w WaitStatus) CoreDump() bool { return w&0x200 != 0 }
   338	
   339	func (w WaitStatus) TrapCause() int { return -1 }
   340	
   341	//sys	ioctl(fd int, req uint, arg uintptr) (err error)
   342	
   343	// ioctl itself should not be exposed directly, but additional get/set
   344	// functions for specific types are permissible.
   345	
   346	// IoctlSetInt performs an ioctl operation which sets an integer value
   347	// on fd, using the specified request number.
   348	func IoctlSetInt(fd int, req uint, value int) error {
   349		return ioctl(fd, req, uintptr(value))
   350	}
   351	
   352	func ioctlSetWinsize(fd int, req uint, value *Winsize) error {
   353		return ioctl(fd, req, uintptr(unsafe.Pointer(value)))
   354	}
   355	
   356	func ioctlSetTermios(fd int, req uint, value *Termios) error {
   357		return ioctl(fd, req, uintptr(unsafe.Pointer(value)))
   358	}
   359	
   360	// IoctlGetInt performs an ioctl operation which gets an integer value
   361	// from fd, using the specified request number.
   362	func IoctlGetInt(fd int, req uint) (int, error) {
   363		var value int
   364		err := ioctl(fd, req, uintptr(unsafe.Pointer(&value)))
   365		return value, err
   366	}
   367	
   368	func IoctlGetWinsize(fd int, req uint) (*Winsize, error) {
   369		var value Winsize
   370		err := ioctl(fd, req, uintptr(unsafe.Pointer(&value)))
   371		return &value, err
   372	}
   373	
   374	func IoctlGetTermios(fd int, req uint) (*Termios, error) {
   375		var value Termios
   376		err := ioctl(fd, req, uintptr(unsafe.Pointer(&value)))
   377		return &value, err
   378	}
   379	
   380	// fcntl must never be called with cmd=F_DUP2FD because it doesn't work on AIX
   381	// There is no way to create a custom fcntl and to keep //sys fcntl easily,
   382	// Therefore, the programmer must call dup2 instead of fcntl in this case.
   383	
   384	// FcntlInt performs a fcntl syscall on fd with the provided command and argument.
   385	//sys	FcntlInt(fd uintptr, cmd int, arg int) (r int,err error) = fcntl
   386	
   387	// FcntlFlock performs a fcntl syscall for the F_GETLK, F_SETLK or F_SETLKW command.
   388	//sys	FcntlFlock(fd uintptr, cmd int, lk *Flock_t) (err error) = fcntl
   389	
   390	//sys	fcntl(fd int, cmd int, arg int) (val int, err error)
   391	
   392	/*
   393	 * Direct access
   394	 */
   395	
   396	//sys	Acct(path string) (err error)
   397	//sys	Chdir(path string) (err error)
   398	//sys	Chroot(path string) (err error)
   399	//sys	Close(fd int) (err error)
   400	//sys	Dup(oldfd int) (fd int, err error)
   401	//sys	Exit(code int)
   402	//sys	Faccessat(dirfd int, path string, mode uint32, flags int) (err error)
   403	//sys	Fchdir(fd int) (err error)
   404	//sys	Fchmod(fd int, mode uint32) (err error)
   405	//sys	Fchmodat(dirfd int, path string, mode uint32, flags int) (err error)
   406	//sys	Fchownat(dirfd int, path string, uid int, gid int, flags int) (err error)
   407	//sys	Fdatasync(fd int) (err error)
   408	//sys	Fsync(fd int) (err error)
   409	// readdir_r
   410	//sysnb	Getpgid(pid int) (pgid int, err error)
   411	
   412	//sys	Getpgrp() (pid int)
   413	
   414	//sysnb	Getpid() (pid int)
   415	//sysnb	Getppid() (ppid int)
   416	//sys	Getpriority(which int, who int) (prio int, err error)
   417	//sysnb	Getrusage(who int, rusage *Rusage) (err error)
   418	//sysnb	Getsid(pid int) (sid int, err error)
   419	//sysnb	Kill(pid int, sig Signal) (err error)
   420	//sys	Klogctl(typ int, buf []byte) (n int, err error) = syslog
   421	//sys	Mkdir(dirfd int, path string, mode uint32) (err error)
   422	//sys	Mkdirat(dirfd int, path string, mode uint32) (err error)
   423	//sys	Mkfifo(path string, mode uint32) (err error)
   424	//sys	Mknod(path string, mode uint32, dev int) (err error)
   425	//sys	Mknodat(dirfd int, path string, mode uint32, dev int) (err error)
   426	//sys	Nanosleep(time *Timespec, leftover *Timespec) (err error)
   427	//sys   Open(path string, mode int, perm uint32) (fd int, err error) = open64
   428	//sys   Openat(dirfd int, path string, flags int, mode uint32) (fd int, err error)
   429	//sys	read(fd int, p []byte) (n int, err error)
   430	//sys	Readlink(path string, buf []byte) (n int, err error)
   431	//sys	Renameat(olddirfd int, oldpath string, newdirfd int, newpath string) (err error)
   432	//sys	Setdomainname(p []byte) (err error)
   433	//sys	Sethostname(p []byte) (err error)
   434	//sysnb	Setpgid(pid int, pgid int) (err error)
   435	//sysnb	Setsid() (pid int, err error)
   436	//sysnb	Settimeofday(tv *Timeval) (err error)
   437	
   438	//sys	Setuid(uid int) (err error)
   439	//sys	Setgid(uid int) (err error)
   440	
   441	//sys	Setpriority(which int, who int, prio int) (err error)
   442	//sys	Statx(dirfd int, path string, flags int, mask int, stat *Statx_t) (err error)
   443	//sys	Sync()
   444	//sysnb	Times(tms *Tms) (ticks uintptr, err error)
   445	//sysnb	Umask(mask int) (oldmask int)
   446	//sysnb	Uname(buf *Utsname) (err error)
   447	//sys   Unlink(path string) (err error)
   448	//sys   Unlinkat(dirfd int, path string, flags int) (err error)
   449	//sys	Ustat(dev int, ubuf *Ustat_t) (err error)
   450	//sys	write(fd int, p []byte) (n int, err error)
   451	//sys	readlen(fd int, p *byte, np int) (n int, err error) = read
   452	//sys	writelen(fd int, p *byte, np int) (n int, err error) = write
   453	
   454	//sys	Dup2(oldfd int, newfd int) (err error)
   455	//sys	Fadvise(fd int, offset int64, length int64, advice int) (err error) = posix_fadvise64
   456	//sys	Fchown(fd int, uid int, gid int) (err error)
   457	//sys	Fstat(fd int, stat *Stat_t) (err error)
   458	//sys	Fstatat(dirfd int, path string, stat *Stat_t, flags int) (err error) = fstatat
   459	//sys	Fstatfs(fd int, buf *Statfs_t) (err error)
   460	//sys	Ftruncate(fd int, length int64) (err error)
   461	//sysnb	Getegid() (egid int)
   462	//sysnb	Geteuid() (euid int)
   463	//sysnb	Getgid() (gid int)
   464	//sysnb	Getuid() (uid int)
   465	//sys	Lchown(path string, uid int, gid int) (err error)
   466	//sys	Listen(s int, n int) (err error)
   467	//sys	Lstat(path string, stat *Stat_t) (err error)
   468	//sys	Pause() (err error)
   469	//sys	Pread(fd int, p []byte, offset int64) (n int, err error) = pread64
   470	//sys	Pwrite(fd int, p []byte, offset int64) (n int, err error) = pwrite64
   471	//sys	Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error)
   472	//sys	Pselect(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timespec, sigmask *Sigset_t) (n int, err error)
   473	//sysnb	Setregid(rgid int, egid int) (err error)
   474	//sysnb	Setreuid(ruid int, euid int) (err error)
   475	//sys	Shutdown(fd int, how int) (err error)
   476	//sys	Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int64, err error)
   477	//sys	Stat(path string, stat *Stat_t) (err error)
   478	//sys	Statfs(path string, buf *Statfs_t) (err error)
   479	//sys	Truncate(path string, length int64) (err error)
   480	
   481	//sys	bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
   482	//sys	connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
   483	//sysnb	getgroups(n int, list *_Gid_t) (nn int, err error)
   484	//sysnb	setgroups(n int, list *_Gid_t) (err error)
   485	//sys	getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error)
   486	//sys	setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error)
   487	//sysnb	socket(domain int, typ int, proto int) (fd int, err error)
   488	//sysnb	socketpair(domain int, typ int, proto int, fd *[2]int32) (err error)
   489	//sysnb	getpeername(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error)
   490	//sysnb	getsockname(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error)
   491	//sys	recvfrom(fd int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (n int, err error)
   492	//sys	sendto(s int, buf []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (err error)
   493	
   494	// In order to use msghdr structure with Control, Controllen, nrecvmsg and nsendmsg must be used.
   495	//sys	recvmsg(s int, msg *Msghdr, flags int) (n int, err error) = nrecvmsg
   496	//sys	sendmsg(s int, msg *Msghdr, flags int) (n int, err error) = nsendmsg
   497	
   498	//sys	munmap(addr uintptr, length uintptr) (err error)
   499	
   500	var mapper = &mmapper{
   501		active: make(map[*byte][]byte),
   502		mmap:   mmap,
   503		munmap: munmap,
   504	}
   505	
   506	func Mmap(fd int, offset int64, length int, prot int, flags int) (data []byte, err error) {
   507		return mapper.Mmap(fd, offset, length, prot, flags)
   508	}
   509	
   510	func Munmap(b []byte) (err error) {
   511		return mapper.Munmap(b)
   512	}
   513	
   514	//sys	Madvise(b []byte, advice int) (err error)
   515	//sys	Mprotect(b []byte, prot int) (err error)
   516	//sys	Mlock(b []byte) (err error)
   517	//sys	Mlockall(flags int) (err error)
   518	//sys	Msync(b []byte, flags int) (err error)
   519	//sys	Munlock(b []byte) (err error)
   520	//sys	Munlockall() (err error)
   521	
   522	//sysnb pipe(p *[2]_C_int) (err error)
   523	
   524	func Pipe(p []int) (err error) {
   525		if len(p) != 2 {
   526			return EINVAL
   527		}
   528		var pp [2]_C_int
   529		err = pipe(&pp)
   530		p[0] = int(pp[0])
   531		p[1] = int(pp[1])
   532		return
   533	}
   534	
   535	//sys	poll(fds *PollFd, nfds int, timeout int) (n int, err error)
   536	
   537	func Poll(fds []PollFd, timeout int) (n int, err error) {
   538		if len(fds) == 0 {
   539			return poll(nil, 0, timeout)
   540		}
   541		return poll(&fds[0], len(fds), timeout)
   542	}
   543	
   544	//sys	gettimeofday(tv *Timeval, tzp *Timezone) (err error)
   545	//sysnb	Time(t *Time_t) (tt Time_t, err error)
   546	//sys	Utime(path string, buf *Utimbuf) (err error)
   547	
   548	//sys	Getsystemcfg(label int) (n uint64)
   549	
   550	//sys	umount(target string) (err error)
   551	func Unmount(target string, flags int) (err error) {
   552		if flags != 0 {
   553			// AIX doesn't have any flags for umount.
   554			return ENOSYS
   555		}
   556		return umount(target)
   557	}
   558	

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