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1 // Copyright 2009 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 // DragonFly BSD system calls.
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6 // This file is compiled as ordinary Go code,
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7 // but it is also input to mksyscall,
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8 // which parses the //sys lines and generates system call stubs.
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9 // Note that sometimes we use a lowercase //sys name and wrap
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10 // it in our own nicer implementation, either here or in
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11 // syscall_bsd.go or syscall_unix.go.
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12
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13 package unix
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14
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15 import (
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16 "sync"
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17 "unsafe"
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18 )
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19
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20 // See version list in https://github.com/DragonFlyBSD/DragonFlyBSD/blob/master/sys/sys/param.h
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21 var (
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22 osreldateOnce sync.Once
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23 osreldate uint32
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24 )
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25
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26 // First __DragonFly_version after September 2019 ABI changes
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27 // http://lists.dragonflybsd.org/pipermail/users/2019-September/358280.html
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28 const _dragonflyABIChangeVersion = 500705
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29
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30 func supportsABI(ver uint32) bool {
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31 osreldateOnce.Do(func() { osreldate, _ = SysctlUint32("kern.osreldate") })
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32 return osreldate >= ver
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33 }
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34
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35 // SockaddrDatalink implements the Sockaddr interface for AF_LINK type sockets.
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36 type SockaddrDatalink struct {
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37 Len uint8
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38 Family uint8
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39 Index uint16
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40 Type uint8
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41 Nlen uint8
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42 Alen uint8
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43 Slen uint8
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44 Data [12]int8
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45 Rcf uint16
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46 Route [16]uint16
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47 raw RawSockaddrDatalink
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48 }
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49
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50 func anyToSockaddrGOOS(fd int, rsa *RawSockaddrAny) (Sockaddr, error) {
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51 return nil, EAFNOSUPPORT
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52 }
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53
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54 // Translate "kern.hostname" to []_C_int{0,1,2,3}.
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55 func nametomib(name string) (mib []_C_int, err error) {
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56 const siz = unsafe.Sizeof(mib[0])
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57
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58 // NOTE(rsc): It seems strange to set the buffer to have
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59 // size CTL_MAXNAME+2 but use only CTL_MAXNAME
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60 // as the size. I don't know why the +2 is here, but the
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61 // kernel uses +2 for its own implementation of this function.
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62 // I am scared that if we don't include the +2 here, the kernel
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63 // will silently write 2 words farther than we specify
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64 // and we'll get memory corruption.
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65 var buf [CTL_MAXNAME + 2]_C_int
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66 n := uintptr(CTL_MAXNAME) * siz
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67
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68 p := (*byte)(unsafe.Pointer(&buf[0]))
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69 bytes, err := ByteSliceFromString(name)
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70 if err != nil {
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71 return nil, err
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72 }
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73
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74 // Magic sysctl: "setting" 0.3 to a string name
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75 // lets you read back the array of integers form.
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76 if err = sysctl([]_C_int{0, 3}, p, &n, &bytes[0], uintptr(len(name))); err != nil {
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77 return nil, err
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78 }
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79 return buf[0 : n/siz], nil
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80 }
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81
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82 func direntIno(buf []byte) (uint64, bool) {
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83 return readInt(buf, unsafe.Offsetof(Dirent{}.Fileno), unsafe.Sizeof(Dirent{}.Fileno))
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84 }
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85
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86 func direntReclen(buf []byte) (uint64, bool) {
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87 namlen, ok := direntNamlen(buf)
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88 if !ok {
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89 return 0, false
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90 }
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91 return (16 + namlen + 1 + 7) &^ 7, true
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92 }
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93
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94 func direntNamlen(buf []byte) (uint64, bool) {
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95 return readInt(buf, unsafe.Offsetof(Dirent{}.Namlen), unsafe.Sizeof(Dirent{}.Namlen))
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96 }
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97
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98 //sysnb pipe() (r int, w int, err error)
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99
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100 func Pipe(p []int) (err error) {
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101 if len(p) != 2 {
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102 return EINVAL
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103 }
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104 r, w, err := pipe()
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105 if err == nil {
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106 p[0], p[1] = r, w
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107 }
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108 return
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109 }
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110
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111 //sysnb pipe2(p *[2]_C_int, flags int) (r int, w int, err error)
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112
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113 func Pipe2(p []int, flags int) (err error) {
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114 if len(p) != 2 {
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115 return EINVAL
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116 }
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117 var pp [2]_C_int
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118 // pipe2 on dragonfly takes an fds array as an argument, but still
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119 // returns the file descriptors.
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120 r, w, err := pipe2(&pp, flags)
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121 if err == nil {
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122 p[0], p[1] = r, w
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123 }
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124 return err
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125 }
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126
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127 //sys extpread(fd int, p []byte, flags int, offset int64) (n int, err error)
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128
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129 func pread(fd int, p []byte, offset int64) (n int, err error) {
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130 return extpread(fd, p, 0, offset)
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131 }
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132
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133 //sys extpwrite(fd int, p []byte, flags int, offset int64) (n int, err error)
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134
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135 func pwrite(fd int, p []byte, offset int64) (n int, err error) {
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136 return extpwrite(fd, p, 0, offset)
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137 }
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138
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139 func Accept4(fd, flags int) (nfd int, sa Sockaddr, err error) {
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140 var rsa RawSockaddrAny
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141 var len _Socklen = SizeofSockaddrAny
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142 nfd, err = accept4(fd, &rsa, &len, flags)
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143 if err != nil {
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144 return
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145 }
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146 if len > SizeofSockaddrAny {
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147 panic("RawSockaddrAny too small")
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148 }
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149 sa, err = anyToSockaddr(fd, &rsa)
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150 if err != nil {
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151 Close(nfd)
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152 nfd = 0
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153 }
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154 return
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155 }
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156
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157 //sys Getcwd(buf []byte) (n int, err error) = SYS___GETCWD
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158
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159 func Getfsstat(buf []Statfs_t, flags int) (n int, err error) {
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160 var _p0 unsafe.Pointer
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161 var bufsize uintptr
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162 if len(buf) > 0 {
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163 _p0 = unsafe.Pointer(&buf[0])
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164 bufsize = unsafe.Sizeof(Statfs_t{}) * uintptr(len(buf))
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165 }
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166 r0, _, e1 := Syscall(SYS_GETFSSTAT, uintptr(_p0), bufsize, uintptr(flags))
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167 n = int(r0)
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168 if e1 != 0 {
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169 err = e1
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170 }
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171 return
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172 }
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173
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174 //sys ioctl(fd int, req uint, arg uintptr) (err error)
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175
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176 //sys sysctl(mib []_C_int, old *byte, oldlen *uintptr, new *byte, newlen uintptr) (err error) = SYS___SYSCTL
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177
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178 func sysctlUname(mib []_C_int, old *byte, oldlen *uintptr) error {
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179 err := sysctl(mib, old, oldlen, nil, 0)
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180 if err != nil {
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181 // Utsname members on Dragonfly are only 32 bytes and
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182 // the syscall returns ENOMEM in case the actual value
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183 // is longer.
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184 if err == ENOMEM {
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185 err = nil
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186 }
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187 }
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188 return err
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189 }
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190
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191 func Uname(uname *Utsname) error {
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192 mib := []_C_int{CTL_KERN, KERN_OSTYPE}
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193 n := unsafe.Sizeof(uname.Sysname)
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194 if err := sysctlUname(mib, &uname.Sysname[0], &n); err != nil {
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195 return err
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196 }
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197 uname.Sysname[unsafe.Sizeof(uname.Sysname)-1] = 0
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198
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199 mib = []_C_int{CTL_KERN, KERN_HOSTNAME}
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200 n = unsafe.Sizeof(uname.Nodename)
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201 if err := sysctlUname(mib, &uname.Nodename[0], &n); err != nil {
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202 return err
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203 }
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204 uname.Nodename[unsafe.Sizeof(uname.Nodename)-1] = 0
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205
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206 mib = []_C_int{CTL_KERN, KERN_OSRELEASE}
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207 n = unsafe.Sizeof(uname.Release)
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208 if err := sysctlUname(mib, &uname.Release[0], &n); err != nil {
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209 return err
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210 }
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211 uname.Release[unsafe.Sizeof(uname.Release)-1] = 0
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212
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213 mib = []_C_int{CTL_KERN, KERN_VERSION}
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214 n = unsafe.Sizeof(uname.Version)
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215 if err := sysctlUname(mib, &uname.Version[0], &n); err != nil {
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216 return err
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217 }
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218
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219 // The version might have newlines or tabs in it, convert them to
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220 // spaces.
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221 for i, b := range uname.Version {
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222 if b == '\n' || b == '\t' {
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223 if i == len(uname.Version)-1 {
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224 uname.Version[i] = 0
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225 } else {
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226 uname.Version[i] = ' '
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227 }
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228 }
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229 }
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230
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231 mib = []_C_int{CTL_HW, HW_MACHINE}
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232 n = unsafe.Sizeof(uname.Machine)
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233 if err := sysctlUname(mib, &uname.Machine[0], &n); err != nil {
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234 return err
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235 }
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236 uname.Machine[unsafe.Sizeof(uname.Machine)-1] = 0
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237
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238 return nil
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239 }
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240
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241 func Sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) {
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242 if raceenabled {
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243 raceReleaseMerge(unsafe.Pointer(&ioSync))
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244 }
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245 return sendfile(outfd, infd, offset, count)
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246 }
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247
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248 /*
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249 * Exposed directly
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250 */
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251 //sys Access(path string, mode uint32) (err error)
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252 //sys Adjtime(delta *Timeval, olddelta *Timeval) (err error)
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253 //sys Chdir(path string) (err error)
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254 //sys Chflags(path string, flags int) (err error)
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255 //sys Chmod(path string, mode uint32) (err error)
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256 //sys Chown(path string, uid int, gid int) (err error)
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257 //sys Chroot(path string) (err error)
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258 //sys Close(fd int) (err error)
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259 //sys Dup(fd int) (nfd int, err error)
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260 //sys Dup2(from int, to int) (err error)
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261 //sys Exit(code int)
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262 //sys Faccessat(dirfd int, path string, mode uint32, flags int) (err error)
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263 //sys Fchdir(fd int) (err error)
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264 //sys Fchflags(fd int, flags int) (err error)
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265 //sys Fchmod(fd int, mode uint32) (err error)
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266 //sys Fchmodat(dirfd int, path string, mode uint32, flags int) (err error)
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267 //sys Fchown(fd int, uid int, gid int) (err error)
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268 //sys Fchownat(dirfd int, path string, uid int, gid int, flags int) (err error)
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269 //sys Flock(fd int, how int) (err error)
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270 //sys Fpathconf(fd int, name int) (val int, err error)
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271 //sys Fstat(fd int, stat *Stat_t) (err error)
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272 //sys Fstatat(fd int, path string, stat *Stat_t, flags int) (err error)
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273 //sys Fstatfs(fd int, stat *Statfs_t) (err error)
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274 //sys Fsync(fd int) (err error)
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275 //sys Ftruncate(fd int, length int64) (err error)
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276 //sys Getdents(fd int, buf []byte) (n int, err error)
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277 //sys Getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error)
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278 //sys Getdtablesize() (size int)
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279 //sysnb Getegid() (egid int)
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280 //sysnb Geteuid() (uid int)
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281 //sysnb Getgid() (gid int)
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282 //sysnb Getpgid(pid int) (pgid int, err error)
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283 //sysnb Getpgrp() (pgrp int)
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284 //sysnb Getpid() (pid int)
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285 //sysnb Getppid() (ppid int)
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286 //sys Getpriority(which int, who int) (prio int, err error)
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287 //sysnb Getrlimit(which int, lim *Rlimit) (err error)
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288 //sysnb Getrusage(who int, rusage *Rusage) (err error)
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289 //sysnb Getsid(pid int) (sid int, err error)
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290 //sysnb Gettimeofday(tv *Timeval) (err error)
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291 //sysnb Getuid() (uid int)
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292 //sys Issetugid() (tainted bool)
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293 //sys Kill(pid int, signum syscall.Signal) (err error)
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294 //sys Kqueue() (fd int, err error)
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295 //sys Lchown(path string, uid int, gid int) (err error)
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296 //sys Link(path string, link string) (err error)
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297 //sys Linkat(pathfd int, path string, linkfd int, link string, flags int) (err error)
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298 //sys Listen(s int, backlog int) (err error)
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299 //sys Lstat(path string, stat *Stat_t) (err error)
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300 //sys Mkdir(path string, mode uint32) (err error)
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301 //sys Mkdirat(dirfd int, path string, mode uint32) (err error)
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302 //sys Mkfifo(path string, mode uint32) (err error)
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303 //sys Mknod(path string, mode uint32, dev int) (err error)
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304 //sys Mknodat(fd int, path string, mode uint32, dev int) (err error)
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305 //sys Nanosleep(time *Timespec, leftover *Timespec) (err error)
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306 //sys Open(path string, mode int, perm uint32) (fd int, err error)
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307 //sys Openat(dirfd int, path string, mode int, perm uint32) (fd int, err error)
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308 //sys Pathconf(path string, name int) (val int, err error)
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309 //sys read(fd int, p []byte) (n int, err error)
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310 //sys Readlink(path string, buf []byte) (n int, err error)
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311 //sys Rename(from string, to string) (err error)
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312 //sys Renameat(fromfd int, from string, tofd int, to string) (err error)
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313 //sys Revoke(path string) (err error)
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314 //sys Rmdir(path string) (err error)
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315 //sys Seek(fd int, offset int64, whence int) (newoffset int64, err error) = SYS_LSEEK
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316 //sys Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error)
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317 //sysnb Setegid(egid int) (err error)
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318 //sysnb Seteuid(euid int) (err error)
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319 //sysnb Setgid(gid int) (err error)
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320 //sys Setlogin(name string) (err error)
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321 //sysnb Setpgid(pid int, pgid int) (err error)
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322 //sys Setpriority(which int, who int, prio int) (err error)
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323 //sysnb Setregid(rgid int, egid int) (err error)
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324 //sysnb Setreuid(ruid int, euid int) (err error)
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325 //sysnb Setresgid(rgid int, egid int, sgid int) (err error)
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326 //sysnb Setresuid(ruid int, euid int, suid int) (err error)
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327 //sysnb Setrlimit(which int, lim *Rlimit) (err error)
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328 //sysnb Setsid() (pid int, err error)
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329 //sysnb Settimeofday(tp *Timeval) (err error)
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330 //sysnb Setuid(uid int) (err error)
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331 //sys Stat(path string, stat *Stat_t) (err error)
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332 //sys Statfs(path string, stat *Statfs_t) (err error)
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333 //sys Symlink(path string, link string) (err error)
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334 //sys Symlinkat(oldpath string, newdirfd int, newpath string) (err error)
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335 //sys Sync() (err error)
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336 //sys Truncate(path string, length int64) (err error)
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337 //sys Umask(newmask int) (oldmask int)
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338 //sys Undelete(path string) (err error)
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339 //sys Unlink(path string) (err error)
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340 //sys Unlinkat(dirfd int, path string, flags int) (err error)
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341 //sys Unmount(path string, flags int) (err error)
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342 //sys write(fd int, p []byte) (n int, err error)
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343 //sys mmap(addr uintptr, length uintptr, prot int, flag int, fd int, pos int64) (ret uintptr, err error)
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344 //sys munmap(addr uintptr, length uintptr) (err error)
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345 //sys readlen(fd int, buf *byte, nbuf int) (n int, err error) = SYS_READ
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346 //sys writelen(fd int, buf *byte, nbuf int) (n int, err error) = SYS_WRITE
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347 //sys accept4(fd int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (nfd int, err error)
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348 //sys utimensat(dirfd int, path string, times *[2]Timespec, flags int) (err error)
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349
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350 /*
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351 * Unimplemented
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352 * TODO(jsing): Update this list for DragonFly.
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353 */
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354 // Profil
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355 // Sigaction
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356 // Sigprocmask
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357 // Getlogin
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358 // Sigpending
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359 // Sigaltstack
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360 // Reboot
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361 // Execve
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362 // Vfork
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363 // Sbrk
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364 // Sstk
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365 // Ovadvise
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366 // Mincore
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367 // Setitimer
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368 // Swapon
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369 // Select
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370 // Sigsuspend
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371 // Readv
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372 // Writev
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373 // Nfssvc
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374 // Getfh
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375 // Quotactl
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376 // Mount
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377 // Csops
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378 // Waitid
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379 // Add_profil
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380 // Kdebug_trace
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381 // Sigreturn
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382 // Atsocket
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383 // Kqueue_from_portset_np
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384 // Kqueue_portset
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385 // Getattrlist
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386 // Setattrlist
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387 // Getdirentriesattr
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388 // Searchfs
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389 // Delete
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390 // Copyfile
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391 // Watchevent
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392 // Waitevent
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393 // Modwatch
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394 // Getxattr
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395 // Fgetxattr
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396 // Setxattr
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397 // Fsetxattr
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398 // Removexattr
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399 // Fremovexattr
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400 // Listxattr
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401 // Flistxattr
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402 // Fsctl
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403 // Initgroups
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404 // Posix_spawn
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405 // Nfsclnt
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406 // Fhopen
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407 // Minherit
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408 // Semsys
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409 // Msgsys
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410 // Shmsys
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411 // Semctl
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412 // Semget
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413 // Semop
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414 // Msgctl
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415 // Msgget
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416 // Msgsnd
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417 // Msgrcv
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418 // Shmat
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419 // Shmctl
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420 // Shmdt
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421 // Shmget
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422 // Shm_open
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423 // Shm_unlink
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424 // Sem_open
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425 // Sem_close
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426 // Sem_unlink
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427 // Sem_wait
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428 // Sem_trywait
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429 // Sem_post
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430 // Sem_getvalue
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431 // Sem_init
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432 // Sem_destroy
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433 // Open_extended
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434 // Umask_extended
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435 // Stat_extended
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436 // Lstat_extended
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437 // Fstat_extended
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438 // Chmod_extended
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439 // Fchmod_extended
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440 // Access_extended
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441 // Settid
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442 // Gettid
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443 // Setsgroups
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444 // Getsgroups
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445 // Setwgroups
|
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446 // Getwgroups
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447 // Mkfifo_extended
|
|
448 // Mkdir_extended
|
|
449 // Identitysvc
|
|
450 // Shared_region_check_np
|
|
451 // Shared_region_map_np
|
|
452 // __pthread_mutex_destroy
|
|
453 // __pthread_mutex_init
|
|
454 // __pthread_mutex_lock
|
|
455 // __pthread_mutex_trylock
|
|
456 // __pthread_mutex_unlock
|
|
457 // __pthread_cond_init
|
|
458 // __pthread_cond_destroy
|
|
459 // __pthread_cond_broadcast
|
|
460 // __pthread_cond_signal
|
|
461 // Setsid_with_pid
|
|
462 // __pthread_cond_timedwait
|
|
463 // Aio_fsync
|
|
464 // Aio_return
|
|
465 // Aio_suspend
|
|
466 // Aio_cancel
|
|
467 // Aio_error
|
|
468 // Aio_read
|
|
469 // Aio_write
|
|
470 // Lio_listio
|
|
471 // __pthread_cond_wait
|
|
472 // Iopolicysys
|
|
473 // __pthread_kill
|
|
474 // __pthread_sigmask
|
|
475 // __sigwait
|
|
476 // __disable_threadsignal
|
|
477 // __pthread_markcancel
|
|
478 // __pthread_canceled
|
|
479 // __semwait_signal
|
|
480 // Proc_info
|
|
481 // Stat64_extended
|
|
482 // Lstat64_extended
|
|
483 // Fstat64_extended
|
|
484 // __pthread_chdir
|
|
485 // __pthread_fchdir
|
|
486 // Audit
|
|
487 // Auditon
|
|
488 // Getauid
|
|
489 // Setauid
|
|
490 // Getaudit
|
|
491 // Setaudit
|
|
492 // Getaudit_addr
|
|
493 // Setaudit_addr
|
|
494 // Auditctl
|
|
495 // Bsdthread_create
|
|
496 // Bsdthread_terminate
|
|
497 // Stack_snapshot
|
|
498 // Bsdthread_register
|
|
499 // Workq_open
|
|
500 // Workq_ops
|
|
501 // __mac_execve
|
|
502 // __mac_syscall
|
|
503 // __mac_get_file
|
|
504 // __mac_set_file
|
|
505 // __mac_get_link
|
|
506 // __mac_set_link
|
|
507 // __mac_get_proc
|
|
508 // __mac_set_proc
|
|
509 // __mac_get_fd
|
|
510 // __mac_set_fd
|
|
511 // __mac_get_pid
|
|
512 // __mac_get_lcid
|
|
513 // __mac_get_lctx
|
|
514 // __mac_set_lctx
|
|
515 // Setlcid
|
|
516 // Read_nocancel
|
|
517 // Write_nocancel
|
|
518 // Open_nocancel
|
|
519 // Close_nocancel
|
|
520 // Wait4_nocancel
|
|
521 // Recvmsg_nocancel
|
|
522 // Sendmsg_nocancel
|
|
523 // Recvfrom_nocancel
|
|
524 // Accept_nocancel
|
|
525 // Fcntl_nocancel
|
|
526 // Select_nocancel
|
|
527 // Fsync_nocancel
|
|
528 // Connect_nocancel
|
|
529 // Sigsuspend_nocancel
|
|
530 // Readv_nocancel
|
|
531 // Writev_nocancel
|
|
532 // Sendto_nocancel
|
|
533 // Pread_nocancel
|
|
534 // Pwrite_nocancel
|
|
535 // Waitid_nocancel
|
|
536 // Msgsnd_nocancel
|
|
537 // Msgrcv_nocancel
|
|
538 // Sem_wait_nocancel
|
|
539 // Aio_suspend_nocancel
|
|
540 // __sigwait_nocancel
|
|
541 // __semwait_signal_nocancel
|
|
542 // __mac_mount
|
|
543 // __mac_get_mount
|
|
544 // __mac_getfsstat
|