1// Copyright 2009,2010 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// Darwin system calls. 6// This file is compiled as ordinary Go code, 7// but it is also input to mksyscall, 8// which parses the //sys lines and generates system call stubs. 9// Note that sometimes we use a lowercase //sys name and wrap 10// it in our own nicer implementation, either here or in 11// syscall_bsd.go or syscall_unix.go. 12 13package unix 14 15import ( 16 errorspkg "errors" 17 "syscall" 18 "unsafe" 19) 20 21const ImplementsGetwd = true 22 23func Getwd() (string, error) { 24 buf := make([]byte, 2048) 25 attrs, err := getAttrList(".", attrList{CommonAttr: attrCmnFullpath}, buf, 0) 26 if err == nil && len(attrs) == 1 && len(attrs[0]) >= 2 { 27 wd := string(attrs[0]) 28 // Sanity check that it's an absolute path and ends 29 // in a null byte, which we then strip. 30 if wd[0] == '/' && wd[len(wd)-1] == 0 { 31 return wd[:len(wd)-1], nil 32 } 33 } 34 // If pkg/os/getwd.go gets ENOTSUP, it will fall back to the 35 // slow algorithm. 36 return "", ENOTSUP 37} 38 39type SockaddrDatalink struct { 40 Len uint8 41 Family uint8 42 Index uint16 43 Type uint8 44 Nlen uint8 45 Alen uint8 46 Slen uint8 47 Data [12]int8 48 raw RawSockaddrDatalink 49} 50 51// Translate "kern.hostname" to []_C_int{0,1,2,3}. 52func nametomib(name string) (mib []_C_int, err error) { 53 const siz = unsafe.Sizeof(mib[0]) 54 55 // NOTE(rsc): It seems strange to set the buffer to have 56 // size CTL_MAXNAME+2 but use only CTL_MAXNAME 57 // as the size. I don't know why the +2 is here, but the 58 // kernel uses +2 for its own implementation of this function. 59 // I am scared that if we don't include the +2 here, the kernel 60 // will silently write 2 words farther than we specify 61 // and we'll get memory corruption. 62 var buf [CTL_MAXNAME + 2]_C_int 63 n := uintptr(CTL_MAXNAME) * siz 64 65 p := (*byte)(unsafe.Pointer(&buf[0])) 66 bytes, err := ByteSliceFromString(name) 67 if err != nil { 68 return nil, err 69 } 70 71 // Magic sysctl: "setting" 0.3 to a string name 72 // lets you read back the array of integers form. 73 if err = sysctl([]_C_int{0, 3}, p, &n, &bytes[0], uintptr(len(name))); err != nil { 74 return nil, err 75 } 76 return buf[0 : n/siz], nil 77} 78 79func direntIno(buf []byte) (uint64, bool) { 80 return readInt(buf, unsafe.Offsetof(Dirent{}.Ino), unsafe.Sizeof(Dirent{}.Ino)) 81} 82 83func direntReclen(buf []byte) (uint64, bool) { 84 return readInt(buf, unsafe.Offsetof(Dirent{}.Reclen), unsafe.Sizeof(Dirent{}.Reclen)) 85} 86 87func direntNamlen(buf []byte) (uint64, bool) { 88 return readInt(buf, unsafe.Offsetof(Dirent{}.Namlen), unsafe.Sizeof(Dirent{}.Namlen)) 89} 90 91//sys ptrace(request int, pid int, addr uintptr, data uintptr) (err error) 92func PtraceAttach(pid int) (err error) { return ptrace(PT_ATTACH, pid, 0, 0) } 93func PtraceDetach(pid int) (err error) { return ptrace(PT_DETACH, pid, 0, 0) } 94 95const ( 96 attrBitMapCount = 5 97 attrCmnFullpath = 0x08000000 98) 99 100type attrList struct { 101 bitmapCount uint16 102 _ uint16 103 CommonAttr uint32 104 VolAttr uint32 105 DirAttr uint32 106 FileAttr uint32 107 Forkattr uint32 108} 109 110func getAttrList(path string, attrList attrList, attrBuf []byte, options uint) (attrs [][]byte, err error) { 111 if len(attrBuf) < 4 { 112 return nil, errorspkg.New("attrBuf too small") 113 } 114 attrList.bitmapCount = attrBitMapCount 115 116 var _p0 *byte 117 _p0, err = BytePtrFromString(path) 118 if err != nil { 119 return nil, err 120 } 121 122 _, _, e1 := Syscall6( 123 SYS_GETATTRLIST, 124 uintptr(unsafe.Pointer(_p0)), 125 uintptr(unsafe.Pointer(&attrList)), 126 uintptr(unsafe.Pointer(&attrBuf[0])), 127 uintptr(len(attrBuf)), 128 uintptr(options), 129 0, 130 ) 131 if e1 != 0 { 132 return nil, e1 133 } 134 size := *(*uint32)(unsafe.Pointer(&attrBuf[0])) 135 136 // dat is the section of attrBuf that contains valid data, 137 // without the 4 byte length header. All attribute offsets 138 // are relative to dat. 139 dat := attrBuf 140 if int(size) < len(attrBuf) { 141 dat = dat[:size] 142 } 143 dat = dat[4:] // remove length prefix 144 145 for i := uint32(0); int(i) < len(dat); { 146 header := dat[i:] 147 if len(header) < 8 { 148 return attrs, errorspkg.New("truncated attribute header") 149 } 150 datOff := *(*int32)(unsafe.Pointer(&header[0])) 151 attrLen := *(*uint32)(unsafe.Pointer(&header[4])) 152 if datOff < 0 || uint32(datOff)+attrLen > uint32(len(dat)) { 153 return attrs, errorspkg.New("truncated results; attrBuf too small") 154 } 155 end := uint32(datOff) + attrLen 156 attrs = append(attrs, dat[datOff:end]) 157 i = end 158 if r := i % 4; r != 0 { 159 i += (4 - r) 160 } 161 } 162 return 163} 164 165//sysnb pipe() (r int, w int, err error) 166 167func Pipe(p []int) (err error) { 168 if len(p) != 2 { 169 return EINVAL 170 } 171 p[0], p[1], err = pipe() 172 return 173} 174 175func Getfsstat(buf []Statfs_t, flags int) (n int, err error) { 176 var _p0 unsafe.Pointer 177 var bufsize uintptr 178 if len(buf) > 0 { 179 _p0 = unsafe.Pointer(&buf[0]) 180 bufsize = unsafe.Sizeof(Statfs_t{}) * uintptr(len(buf)) 181 } 182 r0, _, e1 := Syscall(SYS_GETFSSTAT64, uintptr(_p0), bufsize, uintptr(flags)) 183 n = int(r0) 184 if e1 != 0 { 185 err = e1 186 } 187 return 188} 189 190/* 191 * Wrapped 192 */ 193 194//sys kill(pid int, signum int, posix int) (err error) 195 196func Kill(pid int, signum syscall.Signal) (err error) { return kill(pid, int(signum), 1) } 197 198/* 199 * Exposed directly 200 */ 201//sys Access(path string, mode uint32) (err error) 202//sys Adjtime(delta *Timeval, olddelta *Timeval) (err error) 203//sys Chdir(path string) (err error) 204//sys Chflags(path string, flags int) (err error) 205//sys Chmod(path string, mode uint32) (err error) 206//sys Chown(path string, uid int, gid int) (err error) 207//sys Chroot(path string) (err error) 208//sys Close(fd int) (err error) 209//sys Dup(fd int) (nfd int, err error) 210//sys Dup2(from int, to int) (err error) 211//sys Exchangedata(path1 string, path2 string, options int) (err error) 212//sys Exit(code int) 213//sys Fchdir(fd int) (err error) 214//sys Fchflags(fd int, flags int) (err error) 215//sys Fchmod(fd int, mode uint32) (err error) 216//sys Fchown(fd int, uid int, gid int) (err error) 217//sys Flock(fd int, how int) (err error) 218//sys Fpathconf(fd int, name int) (val int, err error) 219//sys Fstat(fd int, stat *Stat_t) (err error) = SYS_FSTAT64 220//sys Fstatfs(fd int, stat *Statfs_t) (err error) = SYS_FSTATFS64 221//sys Fsync(fd int) (err error) 222//sys Ftruncate(fd int, length int64) (err error) 223//sys Getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error) = SYS_GETDIRENTRIES64 224//sys Getdtablesize() (size int) 225//sysnb Getegid() (egid int) 226//sysnb Geteuid() (uid int) 227//sysnb Getgid() (gid int) 228//sysnb Getpgid(pid int) (pgid int, err error) 229//sysnb Getpgrp() (pgrp int) 230//sysnb Getpid() (pid int) 231//sysnb Getppid() (ppid int) 232//sys Getpriority(which int, who int) (prio int, err error) 233//sysnb Getrlimit(which int, lim *Rlimit) (err error) 234//sysnb Getrusage(who int, rusage *Rusage) (err error) 235//sysnb Getsid(pid int) (sid int, err error) 236//sysnb Getuid() (uid int) 237//sysnb Issetugid() (tainted bool) 238//sys Kqueue() (fd int, err error) 239//sys Lchown(path string, uid int, gid int) (err error) 240//sys Link(path string, link string) (err error) 241//sys Listen(s int, backlog int) (err error) 242//sys Lstat(path string, stat *Stat_t) (err error) = SYS_LSTAT64 243//sys Mkdir(path string, mode uint32) (err error) 244//sys Mkfifo(path string, mode uint32) (err error) 245//sys Mknod(path string, mode uint32, dev int) (err error) 246//sys Mlock(b []byte) (err error) 247//sys Mlockall(flags int) (err error) 248//sys Mprotect(b []byte, prot int) (err error) 249//sys Munlock(b []byte) (err error) 250//sys Munlockall() (err error) 251//sys Open(path string, mode int, perm uint32) (fd int, err error) 252//sys Pathconf(path string, name int) (val int, err error) 253//sys Pread(fd int, p []byte, offset int64) (n int, err error) 254//sys Pwrite(fd int, p []byte, offset int64) (n int, err error) 255//sys read(fd int, p []byte) (n int, err error) 256//sys Readlink(path string, buf []byte) (n int, err error) 257//sys Rename(from string, to string) (err error) 258//sys Revoke(path string) (err error) 259//sys Rmdir(path string) (err error) 260//sys Seek(fd int, offset int64, whence int) (newoffset int64, err error) = SYS_LSEEK 261//sys Select(n int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (err error) 262//sys Setegid(egid int) (err error) 263//sysnb Seteuid(euid int) (err error) 264//sysnb Setgid(gid int) (err error) 265//sys Setlogin(name string) (err error) 266//sysnb Setpgid(pid int, pgid int) (err error) 267//sys Setpriority(which int, who int, prio int) (err error) 268//sys Setprivexec(flag int) (err error) 269//sysnb Setregid(rgid int, egid int) (err error) 270//sysnb Setreuid(ruid int, euid int) (err error) 271//sysnb Setrlimit(which int, lim *Rlimit) (err error) 272//sysnb Setsid() (pid int, err error) 273//sysnb Settimeofday(tp *Timeval) (err error) 274//sysnb Setuid(uid int) (err error) 275//sys Stat(path string, stat *Stat_t) (err error) = SYS_STAT64 276//sys Statfs(path string, stat *Statfs_t) (err error) = SYS_STATFS64 277//sys Symlink(path string, link string) (err error) 278//sys Sync() (err error) 279//sys Truncate(path string, length int64) (err error) 280//sys Umask(newmask int) (oldmask int) 281//sys Undelete(path string) (err error) 282//sys Unlink(path string) (err error) 283//sys Unmount(path string, flags int) (err error) 284//sys write(fd int, p []byte) (n int, err error) 285//sys mmap(addr uintptr, length uintptr, prot int, flag int, fd int, pos int64) (ret uintptr, err error) 286//sys munmap(addr uintptr, length uintptr) (err error) 287//sys readlen(fd int, buf *byte, nbuf int) (n int, err error) = SYS_READ 288//sys writelen(fd int, buf *byte, nbuf int) (n int, err error) = SYS_WRITE 289 290/* 291 * Unimplemented 292 */ 293// Profil 294// Sigaction 295// Sigprocmask 296// Getlogin 297// Sigpending 298// Sigaltstack 299// Ioctl 300// Reboot 301// Execve 302// Vfork 303// Sbrk 304// Sstk 305// Ovadvise 306// Mincore 307// Setitimer 308// Swapon 309// Select 310// Sigsuspend 311// Readv 312// Writev 313// Nfssvc 314// Getfh 315// Quotactl 316// Mount 317// Csops 318// Waitid 319// Add_profil 320// Kdebug_trace 321// Sigreturn 322// Mmap 323// Mlock 324// Munlock 325// Atsocket 326// Kqueue_from_portset_np 327// Kqueue_portset 328// Getattrlist 329// Setattrlist 330// Getdirentriesattr 331// Searchfs 332// Delete 333// Copyfile 334// Poll 335// Watchevent 336// Waitevent 337// Modwatch 338// Getxattr 339// Fgetxattr 340// Setxattr 341// Fsetxattr 342// Removexattr 343// Fremovexattr 344// Listxattr 345// Flistxattr 346// Fsctl 347// Initgroups 348// Posix_spawn 349// Nfsclnt 350// Fhopen 351// Minherit 352// Semsys 353// Msgsys 354// Shmsys 355// Semctl 356// Semget 357// Semop 358// Msgctl 359// Msgget 360// Msgsnd 361// Msgrcv 362// Shmat 363// Shmctl 364// Shmdt 365// Shmget 366// Shm_open 367// Shm_unlink 368// Sem_open 369// Sem_close 370// Sem_unlink 371// Sem_wait 372// Sem_trywait 373// Sem_post 374// Sem_getvalue 375// Sem_init 376// Sem_destroy 377// Open_extended 378// Umask_extended 379// Stat_extended 380// Lstat_extended 381// Fstat_extended 382// Chmod_extended 383// Fchmod_extended 384// Access_extended 385// Settid 386// Gettid 387// Setsgroups 388// Getsgroups 389// Setwgroups 390// Getwgroups 391// Mkfifo_extended 392// Mkdir_extended 393// Identitysvc 394// Shared_region_check_np 395// Shared_region_map_np 396// __pthread_mutex_destroy 397// __pthread_mutex_init 398// __pthread_mutex_lock 399// __pthread_mutex_trylock 400// __pthread_mutex_unlock 401// __pthread_cond_init 402// __pthread_cond_destroy 403// __pthread_cond_broadcast 404// __pthread_cond_signal 405// Setsid_with_pid 406// __pthread_cond_timedwait 407// Aio_fsync 408// Aio_return 409// Aio_suspend 410// Aio_cancel 411// Aio_error 412// Aio_read 413// Aio_write 414// Lio_listio 415// __pthread_cond_wait 416// Iopolicysys 417// Mlockall 418// Munlockall 419// __pthread_kill 420// __pthread_sigmask 421// __sigwait 422// __disable_threadsignal 423// __pthread_markcancel 424// __pthread_canceled 425// __semwait_signal 426// Proc_info 427// sendfile 428// Stat64_extended 429// Lstat64_extended 430// Fstat64_extended 431// __pthread_chdir 432// __pthread_fchdir 433// Audit 434// Auditon 435// Getauid 436// Setauid 437// Getaudit 438// Setaudit 439// Getaudit_addr 440// Setaudit_addr 441// Auditctl 442// Bsdthread_create 443// Bsdthread_terminate 444// Stack_snapshot 445// Bsdthread_register 446// Workq_open 447// Workq_ops 448// __mac_execve 449// __mac_syscall 450// __mac_get_file 451// __mac_set_file 452// __mac_get_link 453// __mac_set_link 454// __mac_get_proc 455// __mac_set_proc 456// __mac_get_fd 457// __mac_set_fd 458// __mac_get_pid 459// __mac_get_lcid 460// __mac_get_lctx 461// __mac_set_lctx 462// Setlcid 463// Read_nocancel 464// Write_nocancel 465// Open_nocancel 466// Close_nocancel 467// Wait4_nocancel 468// Recvmsg_nocancel 469// Sendmsg_nocancel 470// Recvfrom_nocancel 471// Accept_nocancel 472// Msync_nocancel 473// Fcntl_nocancel 474// Select_nocancel 475// Fsync_nocancel 476// Connect_nocancel 477// Sigsuspend_nocancel 478// Readv_nocancel 479// Writev_nocancel 480// Sendto_nocancel 481// Pread_nocancel 482// Pwrite_nocancel 483// Waitid_nocancel 484// Poll_nocancel 485// Msgsnd_nocancel 486// Msgrcv_nocancel 487// Sem_wait_nocancel 488// Aio_suspend_nocancel 489// __sigwait_nocancel 490// __semwait_signal_nocancel 491// __mac_mount 492// __mac_get_mount 493// __mac_getfsstat 494