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1 // Copyright 2018 The Go Authors. All rights reserved.
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2 // Use of this source code is governed by a BSD-style
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3 // license that can be found in the LICENSE file.
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4
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5 //go:build aix
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6 // +build aix
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7
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8 // Aix system calls.
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9 // This file is compiled as ordinary Go code,
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10 // but it is also input to mksyscall,
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11 // which parses the //sys lines and generates system call stubs.
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12 // Note that sometimes we use a lowercase //sys name and
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13 // wrap it in our own nicer implementation.
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14
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15 package unix
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16
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17 import "unsafe"
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18
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19 /*
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20 * Wrapped
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21 */
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22
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23 func Access(path string, mode uint32) (err error) {
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24 return Faccessat(AT_FDCWD, path, mode, 0)
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25 }
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26
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27 func Chmod(path string, mode uint32) (err error) {
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28 return Fchmodat(AT_FDCWD, path, mode, 0)
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29 }
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30
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31 func Chown(path string, uid int, gid int) (err error) {
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32 return Fchownat(AT_FDCWD, path, uid, gid, 0)
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33 }
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34
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35 func Creat(path string, mode uint32) (fd int, err error) {
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36 return Open(path, O_CREAT|O_WRONLY|O_TRUNC, mode)
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37 }
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38
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39 //sys utimes(path string, times *[2]Timeval) (err error)
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40
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41 func Utimes(path string, tv []Timeval) error {
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42 if len(tv) != 2 {
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43 return EINVAL
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44 }
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45 return utimes(path, (*[2]Timeval)(unsafe.Pointer(&tv[0])))
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46 }
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47
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48 //sys utimensat(dirfd int, path string, times *[2]Timespec, flag int) (err error)
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49
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50 func UtimesNano(path string, ts []Timespec) error {
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51 if len(ts) != 2 {
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52 return EINVAL
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53 }
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54 return utimensat(AT_FDCWD, path, (*[2]Timespec)(unsafe.Pointer(&ts[0])), 0)
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55 }
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56
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57 func UtimesNanoAt(dirfd int, path string, ts []Timespec, flags int) error {
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58 if ts == nil {
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59 return utimensat(dirfd, path, nil, flags)
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60 }
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61 if len(ts) != 2 {
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62 return EINVAL
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63 }
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64 return utimensat(dirfd, path, (*[2]Timespec)(unsafe.Pointer(&ts[0])), flags)
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65 }
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66
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67 func (sa *SockaddrInet4) sockaddr() (unsafe.Pointer, _Socklen, error) {
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68 if sa.Port < 0 || sa.Port > 0xFFFF {
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69 return nil, 0, EINVAL
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70 }
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71 sa.raw.Family = AF_INET
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72 p := (*[2]byte)(unsafe.Pointer(&sa.raw.Port))
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73 p[0] = byte(sa.Port >> 8)
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74 p[1] = byte(sa.Port)
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75 sa.raw.Addr = sa.Addr
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76 return unsafe.Pointer(&sa.raw), SizeofSockaddrInet4, nil
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77 }
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78
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79 func (sa *SockaddrInet6) sockaddr() (unsafe.Pointer, _Socklen, error) {
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80 if sa.Port < 0 || sa.Port > 0xFFFF {
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81 return nil, 0, EINVAL
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82 }
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83 sa.raw.Family = AF_INET6
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84 p := (*[2]byte)(unsafe.Pointer(&sa.raw.Port))
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85 p[0] = byte(sa.Port >> 8)
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86 p[1] = byte(sa.Port)
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87 sa.raw.Scope_id = sa.ZoneId
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88 sa.raw.Addr = sa.Addr
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89 return unsafe.Pointer(&sa.raw), SizeofSockaddrInet6, nil
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90 }
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91
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92 func (sa *SockaddrUnix) sockaddr() (unsafe.Pointer, _Socklen, error) {
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93 name := sa.Name
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94 n := len(name)
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95 if n > len(sa.raw.Path) {
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96 return nil, 0, EINVAL
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97 }
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98 if n == len(sa.raw.Path) && name[0] != '@' {
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99 return nil, 0, EINVAL
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100 }
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101 sa.raw.Family = AF_UNIX
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102 for i := 0; i < n; i++ {
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103 sa.raw.Path[i] = uint8(name[i])
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104 }
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105 // length is family (uint16), name, NUL.
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106 sl := _Socklen(2)
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107 if n > 0 {
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108 sl += _Socklen(n) + 1
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109 }
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110 if sa.raw.Path[0] == '@' {
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111 sa.raw.Path[0] = 0
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112 // Don't count trailing NUL for abstract address.
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113 sl--
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114 }
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115
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116 return unsafe.Pointer(&sa.raw), sl, nil
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117 }
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118
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119 func Getsockname(fd int) (sa Sockaddr, err error) {
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120 var rsa RawSockaddrAny
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121 var len _Socklen = SizeofSockaddrAny
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122 if err = getsockname(fd, &rsa, &len); err != nil {
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123 return
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124 }
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125 return anyToSockaddr(fd, &rsa)
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126 }
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127
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128 //sys getcwd(buf []byte) (err error)
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129
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130 const ImplementsGetwd = true
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131
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132 func Getwd() (ret string, err error) {
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133 for len := uint64(4096); ; len *= 2 {
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134 b := make([]byte, len)
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135 err := getcwd(b)
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136 if err == nil {
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137 i := 0
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138 for b[i] != 0 {
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139 i++
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140 }
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141 return string(b[0:i]), nil
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142 }
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143 if err != ERANGE {
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144 return "", err
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145 }
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146 }
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147 }
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148
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149 func Getcwd(buf []byte) (n int, err error) {
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150 err = getcwd(buf)
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151 if err == nil {
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152 i := 0
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153 for buf[i] != 0 {
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154 i++
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155 }
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156 n = i + 1
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157 }
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158 return
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159 }
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160
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161 func Getgroups() (gids []int, err error) {
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162 n, err := getgroups(0, nil)
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163 if err != nil {
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164 return nil, err
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165 }
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166 if n == 0 {
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167 return nil, nil
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168 }
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169
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170 // Sanity check group count. Max is 16 on BSD.
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171 if n < 0 || n > 1000 {
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172 return nil, EINVAL
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173 }
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174
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175 a := make([]_Gid_t, n)
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176 n, err = getgroups(n, &a[0])
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177 if err != nil {
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178 return nil, err
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179 }
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180 gids = make([]int, n)
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181 for i, v := range a[0:n] {
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182 gids[i] = int(v)
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183 }
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184 return
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185 }
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186
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187 func Setgroups(gids []int) (err error) {
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188 if len(gids) == 0 {
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189 return setgroups(0, nil)
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190 }
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191
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192 a := make([]_Gid_t, len(gids))
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193 for i, v := range gids {
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194 a[i] = _Gid_t(v)
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195 }
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196 return setgroups(len(a), &a[0])
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197 }
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198
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199 /*
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200 * Socket
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201 */
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202
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203 //sys accept(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (fd int, err error)
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204
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205 func Accept(fd int) (nfd int, sa Sockaddr, err error) {
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206 var rsa RawSockaddrAny
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207 var len _Socklen = SizeofSockaddrAny
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208 nfd, err = accept(fd, &rsa, &len)
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209 if nfd == -1 {
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210 return
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211 }
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212 sa, err = anyToSockaddr(fd, &rsa)
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213 if err != nil {
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214 Close(nfd)
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215 nfd = 0
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216 }
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217 return
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218 }
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219
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220 func recvmsgRaw(fd int, iov []Iovec, oob []byte, flags int, rsa *RawSockaddrAny) (n, oobn int, recvflags int, err error) {
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221 // Recvmsg not implemented on AIX
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222 return -1, -1, -1, ENOSYS
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223 }
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224
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225 func sendmsgN(fd int, iov []Iovec, oob []byte, ptr unsafe.Pointer, salen _Socklen, flags int) (n int, err error) {
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226 // SendmsgN not implemented on AIX
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227 return -1, ENOSYS
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228 }
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229
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230 func anyToSockaddr(fd int, rsa *RawSockaddrAny) (Sockaddr, error) {
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231 switch rsa.Addr.Family {
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232
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233 case AF_UNIX:
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234 pp := (*RawSockaddrUnix)(unsafe.Pointer(rsa))
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235 sa := new(SockaddrUnix)
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236
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237 // Some versions of AIX have a bug in getsockname (see IV78655).
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238 // We can't rely on sa.Len being set correctly.
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239 n := SizeofSockaddrUnix - 3 // subtract leading Family, Len, terminating NUL.
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240 for i := 0; i < n; i++ {
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241 if pp.Path[i] == 0 {
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242 n = i
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243 break
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244 }
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245 }
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246
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247 bytes := (*[len(pp.Path)]byte)(unsafe.Pointer(&pp.Path[0]))[0:n]
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248 sa.Name = string(bytes)
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249 return sa, nil
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250
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251 case AF_INET:
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252 pp := (*RawSockaddrInet4)(unsafe.Pointer(rsa))
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253 sa := new(SockaddrInet4)
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254 p := (*[2]byte)(unsafe.Pointer(&pp.Port))
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255 sa.Port = int(p[0])<<8 + int(p[1])
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256 sa.Addr = pp.Addr
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257 return sa, nil
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258
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259 case AF_INET6:
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260 pp := (*RawSockaddrInet6)(unsafe.Pointer(rsa))
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261 sa := new(SockaddrInet6)
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262 p := (*[2]byte)(unsafe.Pointer(&pp.Port))
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263 sa.Port = int(p[0])<<8 + int(p[1])
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264 sa.ZoneId = pp.Scope_id
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265 sa.Addr = pp.Addr
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266 return sa, nil
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267 }
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268 return nil, EAFNOSUPPORT
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269 }
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270
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271 func Gettimeofday(tv *Timeval) (err error) {
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272 err = gettimeofday(tv, nil)
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273 return
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274 }
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275
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276 func Sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) {
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277 if raceenabled {
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278 raceReleaseMerge(unsafe.Pointer(&ioSync))
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279 }
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280 return sendfile(outfd, infd, offset, count)
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281 }
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282
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283 // TODO
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284 func sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) {
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285 return -1, ENOSYS
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286 }
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287
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288 func direntIno(buf []byte) (uint64, bool) {
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289 return readInt(buf, unsafe.Offsetof(Dirent{}.Ino), unsafe.Sizeof(Dirent{}.Ino))
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290 }
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291
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292 func direntReclen(buf []byte) (uint64, bool) {
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293 return readInt(buf, unsafe.Offsetof(Dirent{}.Reclen), unsafe.Sizeof(Dirent{}.Reclen))
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294 }
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295
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296 func direntNamlen(buf []byte) (uint64, bool) {
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297 reclen, ok := direntReclen(buf)
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298 if !ok {
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299 return 0, false
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300 }
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301 return reclen - uint64(unsafe.Offsetof(Dirent{}.Name)), true
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302 }
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303
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304 //sys getdirent(fd int, buf []byte) (n int, err error)
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305
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306 func Getdents(fd int, buf []byte) (n int, err error) {
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307 return getdirent(fd, buf)
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308 }
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309
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310 //sys wait4(pid Pid_t, status *_C_int, options int, rusage *Rusage) (wpid Pid_t, err error)
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311
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312 func Wait4(pid int, wstatus *WaitStatus, options int, rusage *Rusage) (wpid int, err error) {
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313 var status _C_int
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314 var r Pid_t
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315 err = ERESTART
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316 // AIX wait4 may return with ERESTART errno, while the processus is still
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317 // active.
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318 for err == ERESTART {
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319 r, err = wait4(Pid_t(pid), &status, options, rusage)
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320 }
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321 wpid = int(r)
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322 if wstatus != nil {
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323 *wstatus = WaitStatus(status)
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324 }
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325 return
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326 }
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327
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328 /*
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329 * Wait
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330 */
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331
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332 type WaitStatus uint32
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333
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334 func (w WaitStatus) Stopped() bool { return w&0x40 != 0 }
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335 func (w WaitStatus) StopSignal() Signal {
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336 if !w.Stopped() {
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337 return -1
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338 }
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339 return Signal(w>>8) & 0xFF
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340 }
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341
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342 func (w WaitStatus) Exited() bool { return w&0xFF == 0 }
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343 func (w WaitStatus) ExitStatus() int {
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344 if !w.Exited() {
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345 return -1
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346 }
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347 return int((w >> 8) & 0xFF)
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348 }
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349
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350 func (w WaitStatus) Signaled() bool { return w&0x40 == 0 && w&0xFF != 0 }
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351 func (w WaitStatus) Signal() Signal {
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352 if !w.Signaled() {
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353 return -1
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354 }
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355 return Signal(w>>16) & 0xFF
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356 }
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357
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358 func (w WaitStatus) Continued() bool { return w&0x01000000 != 0 }
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359
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360 func (w WaitStatus) CoreDump() bool { return w&0x80 == 0x80 }
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361
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362 func (w WaitStatus) TrapCause() int { return -1 }
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363
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364 //sys ioctl(fd int, req uint, arg uintptr) (err error)
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365
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366 // fcntl must never be called with cmd=F_DUP2FD because it doesn't work on AIX
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367 // There is no way to create a custom fcntl and to keep //sys fcntl easily,
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368 // Therefore, the programmer must call dup2 instead of fcntl in this case.
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369
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370 // FcntlInt performs a fcntl syscall on fd with the provided command and argument.
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371 //sys FcntlInt(fd uintptr, cmd int, arg int) (r int,err error) = fcntl
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372
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373 // FcntlFlock performs a fcntl syscall for the F_GETLK, F_SETLK or F_SETLKW command.
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374 //sys FcntlFlock(fd uintptr, cmd int, lk *Flock_t) (err error) = fcntl
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375
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376 //sys fcntl(fd int, cmd int, arg int) (val int, err error)
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377
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378 //sys fsyncRange(fd int, how int, start int64, length int64) (err error) = fsync_range
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379
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380 func Fsync(fd int) error {
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381 return fsyncRange(fd, O_SYNC, 0, 0)
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382 }
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383
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384 /*
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385 * Direct access
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386 */
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387
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388 //sys Acct(path string) (err error)
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389 //sys Chdir(path string) (err error)
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390 //sys Chroot(path string) (err error)
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391 //sys Close(fd int) (err error)
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392 //sys Dup(oldfd int) (fd int, err error)
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393 //sys Exit(code int)
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394 //sys Faccessat(dirfd int, path string, mode uint32, flags int) (err error)
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395 //sys Fchdir(fd int) (err error)
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396 //sys Fchmod(fd int, mode uint32) (err error)
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397 //sys Fchmodat(dirfd int, path string, mode uint32, flags int) (err error)
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398 //sys Fchownat(dirfd int, path string, uid int, gid int, flags int) (err error)
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399 //sys Fdatasync(fd int) (err error)
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400 // readdir_r
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401 //sysnb Getpgid(pid int) (pgid int, err error)
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402
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403 //sys Getpgrp() (pid int)
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404
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405 //sysnb Getpid() (pid int)
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406 //sysnb Getppid() (ppid int)
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407 //sys Getpriority(which int, who int) (prio int, err error)
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408 //sysnb Getrusage(who int, rusage *Rusage) (err error)
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409 //sysnb Getsid(pid int) (sid int, err error)
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410 //sysnb Kill(pid int, sig Signal) (err error)
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411 //sys Klogctl(typ int, buf []byte) (n int, err error) = syslog
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412 //sys Mkdir(dirfd int, path string, mode uint32) (err error)
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413 //sys Mkdirat(dirfd int, path string, mode uint32) (err error)
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414 //sys Mkfifo(path string, mode uint32) (err error)
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415 //sys Mknod(path string, mode uint32, dev int) (err error)
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416 //sys Mknodat(dirfd int, path string, mode uint32, dev int) (err error)
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417 //sys Nanosleep(time *Timespec, leftover *Timespec) (err error)
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418 //sys Open(path string, mode int, perm uint32) (fd int, err error) = open64
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419 //sys Openat(dirfd int, path string, flags int, mode uint32) (fd int, err error)
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420 //sys read(fd int, p []byte) (n int, err error)
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421 //sys Readlink(path string, buf []byte) (n int, err error)
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422 //sys Renameat(olddirfd int, oldpath string, newdirfd int, newpath string) (err error)
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423 //sys Setdomainname(p []byte) (err error)
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424 //sys Sethostname(p []byte) (err error)
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425 //sysnb Setpgid(pid int, pgid int) (err error)
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426 //sysnb Setsid() (pid int, err error)
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427 //sysnb Settimeofday(tv *Timeval) (err error)
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428
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429 //sys Setuid(uid int) (err error)
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430 //sys Setgid(uid int) (err error)
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431
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432 //sys Setpriority(which int, who int, prio int) (err error)
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433 //sys Statx(dirfd int, path string, flags int, mask int, stat *Statx_t) (err error)
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434 //sys Sync()
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435 //sysnb Times(tms *Tms) (ticks uintptr, err error)
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436 //sysnb Umask(mask int) (oldmask int)
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437 //sysnb Uname(buf *Utsname) (err error)
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438 //sys Unlink(path string) (err error)
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439 //sys Unlinkat(dirfd int, path string, flags int) (err error)
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440 //sys Ustat(dev int, ubuf *Ustat_t) (err error)
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441 //sys write(fd int, p []byte) (n int, err error)
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442 //sys readlen(fd int, p *byte, np int) (n int, err error) = read
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443 //sys writelen(fd int, p *byte, np int) (n int, err error) = write
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444
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445 //sys Dup2(oldfd int, newfd int) (err error)
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446 //sys Fadvise(fd int, offset int64, length int64, advice int) (err error) = posix_fadvise64
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447 //sys Fchown(fd int, uid int, gid int) (err error)
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448 //sys fstat(fd int, stat *Stat_t) (err error)
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449 //sys fstatat(dirfd int, path string, stat *Stat_t, flags int) (err error) = fstatat
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450 //sys Fstatfs(fd int, buf *Statfs_t) (err error)
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451 //sys Ftruncate(fd int, length int64) (err error)
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452 //sysnb Getegid() (egid int)
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453 //sysnb Geteuid() (euid int)
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454 //sysnb Getgid() (gid int)
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455 //sysnb Getuid() (uid int)
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456 //sys Lchown(path string, uid int, gid int) (err error)
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457 //sys Listen(s int, n int) (err error)
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458 //sys lstat(path string, stat *Stat_t) (err error)
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459 //sys Pause() (err error)
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460 //sys pread(fd int, p []byte, offset int64) (n int, err error) = pread64
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461 //sys pwrite(fd int, p []byte, offset int64) (n int, err error) = pwrite64
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462 //sys Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error)
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463 //sys Pselect(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timespec, sigmask *Sigset_t) (n int, err error)
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464 //sysnb Setregid(rgid int, egid int) (err error)
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465 //sysnb Setreuid(ruid int, euid int) (err error)
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466 //sys Shutdown(fd int, how int) (err error)
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467 //sys Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int64, err error)
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468 //sys stat(path string, statptr *Stat_t) (err error)
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469 //sys Statfs(path string, buf *Statfs_t) (err error)
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470 //sys Truncate(path string, length int64) (err error)
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471
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472 //sys bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
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473 //sys connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
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474 //sysnb getgroups(n int, list *_Gid_t) (nn int, err error)
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475 //sysnb setgroups(n int, list *_Gid_t) (err error)
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476 //sys getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error)
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477 //sys setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error)
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478 //sysnb socket(domain int, typ int, proto int) (fd int, err error)
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479 //sysnb socketpair(domain int, typ int, proto int, fd *[2]int32) (err error)
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480 //sysnb getpeername(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error)
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481 //sysnb getsockname(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error)
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482 //sys recvfrom(fd int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (n int, err error)
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483 //sys sendto(s int, buf []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (err error)
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484
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485 // In order to use msghdr structure with Control, Controllen, nrecvmsg and nsendmsg must be used.
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486 //sys recvmsg(s int, msg *Msghdr, flags int) (n int, err error) = nrecvmsg
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487 //sys sendmsg(s int, msg *Msghdr, flags int) (n int, err error) = nsendmsg
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488
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489 //sys munmap(addr uintptr, length uintptr) (err error)
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490
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491 var mapper = &mmapper{
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492 active: make(map[*byte][]byte),
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493 mmap: mmap,
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494 munmap: munmap,
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495 }
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496
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497 func Mmap(fd int, offset int64, length int, prot int, flags int) (data []byte, err error) {
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498 return mapper.Mmap(fd, offset, length, prot, flags)
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499 }
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500
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501 func Munmap(b []byte) (err error) {
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502 return mapper.Munmap(b)
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503 }
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504
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505 //sys Madvise(b []byte, advice int) (err error)
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506 //sys Mprotect(b []byte, prot int) (err error)
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507 //sys Mlock(b []byte) (err error)
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508 //sys Mlockall(flags int) (err error)
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509 //sys Msync(b []byte, flags int) (err error)
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510 //sys Munlock(b []byte) (err error)
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511 //sys Munlockall() (err error)
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512
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513 //sysnb pipe(p *[2]_C_int) (err error)
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514
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515 func Pipe(p []int) (err error) {
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516 if len(p) != 2 {
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517 return EINVAL
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518 }
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519 var pp [2]_C_int
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520 err = pipe(&pp)
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521 if err == nil {
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522 p[0] = int(pp[0])
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523 p[1] = int(pp[1])
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524 }
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525 return
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526 }
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527
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528 //sys poll(fds *PollFd, nfds int, timeout int) (n int, err error)
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529
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530 func Poll(fds []PollFd, timeout int) (n int, err error) {
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531 if len(fds) == 0 {
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532 return poll(nil, 0, timeout)
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533 }
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534 return poll(&fds[0], len(fds), timeout)
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535 }
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536
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537 //sys gettimeofday(tv *Timeval, tzp *Timezone) (err error)
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538 //sysnb Time(t *Time_t) (tt Time_t, err error)
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539 //sys Utime(path string, buf *Utimbuf) (err error)
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540
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541 //sys Getsystemcfg(label int) (n uint64)
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542
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543 //sys umount(target string) (err error)
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544
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545 func Unmount(target string, flags int) (err error) {
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546 if flags != 0 {
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547 // AIX doesn't have any flags for umount.
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548 return ENOSYS
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549 }
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550 return umount(target)
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551 }
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