libgo/mksysinfo.sh

   1 #!/bin/sh
   2
   3 # Copyright 2009 The Go Authors. All rights reserved.
   4 # Use of this source code is governed by a BSD-style
   5 # license that can be found in the LICENSE file.
   6
   7 # Create sysinfo.go.
   8
   9 # This shell script creates the sysinfo.go file which holds types and
  10 # constants extracted from the system header files.  This relies on a
  11 # hook in gcc: the -fdump-go-spec option will generate debugging
  12 # information in Go syntax.
  13
  14 # We currently #include all the files at once, which works, but leads
  15 # to exposing some names which ideally should not be exposed, as they
  16 # match grep patterns.  E.g., WCHAR_MIN gets exposed because it starts
  17 # with W, like the wait flags.
  18
  19 CC=${CC:-gcc}
  20 OUT=tmp-sysinfo.go
  21
  22 set -e
  23
  24 rm -f sysinfo.c
  25 cat > sysinfo.c <<EOF
  26 #include "config.h"
  27
  28 #define _GNU_SOURCE
  29 #define _LARGEFILE_SOURCE
  30 #define _FILE_OFFSET_BITS 64
  31
  32 #include <sys/types.h>
  33 #include <dirent.h>
  34 #include <errno.h>
  35 #include <fcntl.h>
  36 #include <netinet/in.h>
  37 /* <netinet/tcp.h> needs u_char/u_short, but <sys/bsd_types> is only
  38    included by <netinet/in.h> if _SGIAPI (i.e. _SGI_SOURCE
  39    && !_XOPEN_SOURCE.  */
  40 #ifdef __sgi__
  41 #include <sys/bsd_types.h>
  42 #endif
  43 #include <netinet/tcp.h>
  44 #include <signal.h>
  45 #if defined(HAVE_SYSCALL_H)
  46 #include <syscall.h>
  47 #endif
  48 #if defined(HAVE_SYS_SYSCALL_H)
  49 #include <sys/syscall.h>
  50 #endif
  51 #if defined(HAVE_SYS_EPOLL_H)
  52 #include <sys/epoll.h>
  53 #endif
  54 #if defined(HAVE_SYS_MMAN_H)
  55 #include <sys/mman.h>
  56 #endif
  57 #if defined(HAVE_SYS_PTRACE_H)
  58 #include <sys/ptrace.h>
  59 #endif
  60 #include <sys/resource.h>
  61 #include <sys/uio.h>
  62 #include <sys/socket.h>
  63 #include <sys/stat.h>
  64 #include <sys/time.h>
  65 #include <sys/wait.h>
  66 #include <sys/un.h>
  67 #if defined(HAVE_SYS_USER_H)
  68 #include <sys/user.h>
  69 #endif
  70 #if defined(HAVE_SYS_UTSNAME_H)
  71 #include <sys/utsname.h>
  72 #endif
  73 #if defined(HAVE_SYS_SELECT_H)
  74 #include <sys/select.h>
  75 #endif
  76 #include <unistd.h>
  77 EOF
  78
  79 ${CC} -fdump-go-spec=gen-sysinfo.go -std=gnu99 -S -o sysinfo.s sysinfo.c
  80
  81 echo 'package syscall' > ${OUT}
  82
  83 # Get all the consts and types, skipping ones which could not be
  84 # represented in Go and ones which we need to rewrite.  We also skip
  85 # function declarations, as we don't need them here.  All the symbols
  86 # will all have a leading underscore.
  87 grep -v '^// ' gen-sysinfo.go | \
  88   grep -v '^func' | \
  89   grep -v '^type _timeval ' | \
  90   grep -v '^type _timespec_t ' | \
  91   grep -v '^type _timespec ' | \
  92   grep -v '^type _timestruc_t ' | \
  93   grep -v '^type _epoll_' | \
  94   grep -v 'in6_addr' | \
  95   grep -v 'sockaddr_in6' | \
  96   sed -e 's/\([^a-zA-Z0-9_]\)_timeval\([^a-zA-Z0-9_]\)/\1Timeval\2/g' \
  97       -e 's/\([^a-zA-Z0-9_]\)_timespec_t\([^a-zA-Z0-9_]\)/\1Timespec\2/g' \
  98       -e 's/\([^a-zA-Z0-9_]\)_timespec\([^a-zA-Z0-9_]\)/\1Timespec\2/g' \
  99       -e 's/\([^a-zA-Z0-9_]\)_timestruc_t\([^a-zA-Z0-9_]\)/\1Timestruc\2/g' \
 100     >> ${OUT}
 101
 102 # The errno constants.
 103 grep '^const _E' gen-sysinfo.go | \
 104   sed -e 's/^\(const \)_\(E[^= ]*\)\(.*\)$/\1\2 = _\2/' >> ${OUT}
 105
 106 # The O_xxx flags.
 107 egrep '^const _(O|F|FD)_' gen-sysinfo.go | \
 108   sed -e 's/^\(const \)_\([^= ]*\)\(.*\)$/\1\2 = _\2/' >> ${OUT}
 109 if ! grep '^const O_ASYNC' ${OUT} >/dev/null 2>&1; then
 110   echo "const O_ASYNC = 0" >> ${OUT}
 111 fi
 112 if ! grep '^const O_CLOEXEC' ${OUT} >/dev/null 2>&1; then
 113   echo "const O_CLOEXEC = 0" >> ${OUT}
 114 fi
 115
 116 # The signal numbers.
 117 grep '^const _SIG[^_]' gen-sysinfo.go | \
 118   grep -v '^const _SIGEV_' | \
 119   sed -e 's/^\(const \)_\(SIG[^= ]*\)\(.*\)$/\1\2 = _\2/' >> ${OUT}
 120
 121 # The syscall numbers.  We force the names to upper case.
 122 grep '^const _SYS_' gen-sysinfo.go | \
 123   sed -e 's/const _\(SYS_[^= ]*\).*$/\1/' | \
 124   while read sys; do
 125     sup=`echo $sys | tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ`
 126     echo "const $sup = _$sys" >> ${OUT}
 127   done
 128
 129 # Stat constants.
 130 grep '^const _S_' gen-sysinfo.go | \
 131   sed -e 's/^\(const \)_\(S_[^= ]*\)\(.*\)$/\1\2 = _\2/' >> ${OUT}
 132
 133 # Mmap constants.
 134 grep '^const _PROT_' gen-sysinfo.go | \
 135   sed -e 's/^\(const \)_\(PROT_[^= ]*\)\(.*\)$/\1\2 = _\2/' >> ${OUT}
 136 grep '^const _MAP_' gen-sysinfo.go | \
 137   sed -e 's/^\(const \)_\(MAP_[^= ]*\)\(.*\)$/\1\2 = _\2/' >> ${OUT}
 138
 139 # Process status constants.
 140 grep '^const _W' gen-sysinfo.go |
 141   sed -e 's/^\(const \)_\(W[^= ]*\)\(.*\)$/\1\2 = _\2/' >> ${OUT}
 142 # WSTOPPED was introduced in glibc 2.3.4.
 143 if ! grep '^const _WSTOPPED = ' gen-sysinfo.go >/dev/null 2>&1; then
 144   if grep '^const _WUNTRACED = ' gen-sysinfo.go > /dev/null 2>&1; then
 145     echo 'const WSTOPPED = _WUNTRACED' >> ${OUT}
 146   else
 147     echo 'const WSTOPPED = 2' >> ${OUT}
 148   fi
 149 fi
 150 if grep '^const ___WALL = ' gen-sysinfo.go >/dev/null 2>&1 \
 151    && ! grep '^const _WALL = ' gen-sysinfo.go >/dev/null 2>&1; then
 152   echo 'const WALL = ___WALL' >> ${OUT}
 153 fi
 154
 155 # Networking constants.
 156 egrep '^const _(AF|SOCK|SOL|SO|IPPROTO|TCP|IP|IPV6)_' gen-sysinfo.go |
 157   sed -e 's/^\(const \)_\([^= ]*\)\(.*\)$/\1\2 = _\2/' >> ${OUT}
 158 grep '^const _SOMAXCONN' gen-sysinfo.go |
 159   sed -e 's/^\(const \)_\(SOMAXCONN[^= ]*\)\(.*\)$/\1\2 = _\2/' \
 160     >> ${OUT}
 161 grep '^const _SHUT_' gen-sysinfo.go |
 162   sed -e 's/^\(const \)_\(SHUT[^= ]*\)\(.*\)$/\1\2 = _\2/' >> ${OUT}
 163
 164 # The net package requires a definition for IPV6ONLY.
 165 if ! grep '^const IPV6_V6ONLY ' ${OUT} >/dev/null 2>&1; then
 166   echo "const IPV6_V6ONLY = 0" >> ${OUT}
 167 fi
 168
 169 # pathconf constants.
 170 grep '^const __PC' gen-sysinfo.go |
 171   sed -e 's/^\(const \)__\(PC[^= ]*\)\(.*\)$/\1\2 = __\2/' >> ${OUT}
 172
 173 # The epoll constants were picked up by the errno constants, but we
 174 # need to be sure the EPOLLRDHUP is defined.
 175 if ! grep '^const EPOLLRDHUP' ${OUT} >/dev/null 2>&1; then
 176   echo "const EPOLLRDHUP = 0x2000" >> ${OUT}
 177 fi
 178
 179 # Ptrace constants.  We don't expose all the PTRACE flags, just the
 180 # PTRACE_O_xxx and PTRACE_EVENT_xxx ones.
 181 grep '^const _PTRACE_O' gen-sysinfo.go |
 182   sed -e 's/^\(const \)_\(PTRACE_O[^= ]*\)\(.*\)$/\1\2 = _\2/' >> ${OUT}
 183 grep '^const _PTRACE_EVENT' gen-sysinfo.go |
 184   sed -e 's/^\(const \)_\(PTRACE_EVENT[^= ]*\)\(.*\)$/\1\2 = _\2/' >> ${OUT}
 185 # We need PTRACE_SETOPTIONS and PTRACE_GETEVENTMSG, but they are not
 186 # defined in older versions of glibc.
 187 if ! grep '^const _PTRACE_SETOPTIONS' ${OUT} > /dev/null 2>&1; then
 188   echo "const _PTRACE_SETOPTIONS = 0x4200" >> ${OUT}
 189 fi
 190 if ! grep '^const PTRACE_O_TRACESYSGOOD' ${OUT} > /dev/null 2>&1; then
 191   echo "const PTRACE_O_TRACESYSGOOD = 0x1" >> ${OUT}
 192 fi
 193 if ! grep '^const PTRACE_O_TRACEFORK' ${OUT} > /dev/null 2>&1; then
 194   echo "const PTRACE_O_TRACEFORK = 0x2" >> ${OUT}
 195 fi
 196 if ! grep '^const PTRACE_O_TRACEVFORK' ${OUT} > /dev/null 2>&1; then
 197   echo "const PTRACE_O_TRACEVFORK = 0x4" >> ${OUT}
 198 fi
 199 if ! grep '^const PTRACE_O_TRACECLONE' ${OUT} > /dev/null 2>&1; then
 200   echo "const PTRACE_O_TRACECLONE = 0x8" >> ${OUT}
 201 fi
 202 if ! grep '^const PTRACE_O_TRACEEXEC' ${OUT} > /dev/null 2>&1; then
 203   echo "const PTRACE_O_TRACEEXEC = 0x10" >> ${OUT}
 204 fi
 205 if ! grep '^const PTRACE_O_TRACEVFORKDONE' ${OUT} > /dev/null 2>&1; then
 206   echo "const PTRACE_O_TRACEVFORKDONE = 0x20" >> ${OUT}
 207 fi
 208 if ! grep '^const PTRACE_O_TRACEEXIT' ${OUT} > /dev/null 2>&1; then
 209   echo "const PTRACE_O_TRACEEXIT = 0x40" >> ${OUT}
 210 fi
 211 if ! grep '^const PTRACE_O_MASK' ${OUT} > /dev/null 2>&1; then
 212   echo "const PTRACE_O_MASK = 0x7f" >> ${OUT}
 213 fi
 214 if ! grep '^const _PTRACE_GETEVENTMSG' ${OUT} > /dev/null 2>&1; then
 215   echo "const _PTRACE_GETEVENTMSG = 0x4201" >> ${OUT}
 216 fi
 217 if ! grep '^const PTRACE_EVENT_FORK' ${OUT} > /dev/null 2>&1; then
 218   echo "const PTRACE_EVENT_FORK = 1" >> ${OUT}
 219 fi
 220 if ! grep '^const PTRACE_EVENT_VFORK' ${OUT} > /dev/null 2>&1; then
 221   echo "const PTRACE_EVENT_VFORK = 2" >> ${OUT}
 222 fi
 223 if ! grep '^const PTRACE_EVENT_CLONE' ${OUT} > /dev/null 2>&1; then
 224   echo "const PTRACE_EVENT_CLONE = 3" >> ${OUT}
 225 fi
 226 if ! grep '^const PTRACE_EVENT_EXEC' ${OUT} > /dev/null 2>&1; then
 227   echo "const PTRACE_EVENT_EXEC = 4" >> ${OUT}
 228 fi
 229 if ! grep '^const PTRACE_EVENT_VFORK_DONE' ${OUT} > /dev/null 2>&1; then
 230   echo "const PTRACE_EVENT_VFORK_DONE = 5" >> ${OUT}
 231 fi
 232 if ! grep '^const PTRACE_EVENT_EXIT' ${OUT} > /dev/null 2>&1; then
 233   echo "const PTRACE_EVENT_EXIT = 6" >> ${OUT}
 234 fi
 235 if ! grep '^const _PTRACE_TRACEME' ${OUT} > /dev/null 2>&1; then
 236   echo "const _PTRACE_TRACEME = 0" >> ${OUT}
 237 fi
 238
 239 # The registers returned by PTRACE_GETREGS.  This is probably
 240 # GNU/Linux specific; it should do no harm if there is no
 241 # _user_regs_struct.
 242 regs=`grep '^type _user_regs_struct struct' gen-sysinfo.go || true`
 243 if test "$regs" != ""; then
 244   regs=`echo $regs | sed -e 's/type _user_regs_struct struct //' -e 's/[{}]//g'`
 245   regs=`echo $regs | sed -e s'/^ *//'`
 246   nregs=
 247   while test -n "$regs"; do
 248     field=`echo $regs | sed -e 's/^\([^;]*\);.*$/\1/'`
 249     regs=`echo $regs | sed -e 's/^[^;]*; *\(.*\)$/\1/'`
 250     # Capitalize the first character of the field.
 251     f=`echo $field | sed -e 's/^\(.\).*$/\1/'`
 252     r=`echo $field | sed -e 's/^.\(.*\)$/\1/'`
 253     f=`echo $f | tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ`
 254     field="$f$r"
 255     nregs="$nregs $field;"
 256   done
 257   echo "type PtraceRegs struct {$nregs }" >> ${OUT}
 258 fi
 259
 260 # Some basic types.
 261 echo 'type Size_t _size_t' >> ${OUT}
 262 echo "type Ssize_t _ssize_t" >> ${OUT}
 263 if grep '^const _HAVE_OFF64_T = ' gen-sysinfo.go > /dev/null 2>&1; then
 264   echo "type Offset_t _off64_t" >> ${OUT}
 265 else
 266   echo "type Offset_t _off_t" >> ${OUT}
 267 fi
 268 echo "type Mode_t _mode_t" >> ${OUT}
 269 echo "type Pid_t _pid_t" >> ${OUT}
 270 echo "type Uid_t _uid_t" >> ${OUT}
 271 echo "type Gid_t _gid_t" >> ${OUT}
 272 echo "type Socklen_t _socklen_t" >> ${OUT}
 273
 274 # The long type, needed because that is the type that ptrace returns.
 275 sizeof_long=`grep '^const ___SIZEOF_LONG__ = ' gen-sysinfo.go | sed -e 's/.*= //'`
 276 if test "$sizeof_long" = "4"; then
 277   echo "type _C_long int32" >> ${OUT}
 278 elif test "$sizeof_long" = "8"; then
 279   echo "type _C_long int64" >> ${OUT}
 280 else
 281   echo 1>&2 "mksysinfo.sh: could not determine size of long (got $sizeof_long)"
 282   exit 1
 283 fi
 284
 285 # Solaris 2 needs _u?pad128_t, but its default definition in terms of long
 286 # double is commented by -fdump-go-spec.
 287 if grep "^// type _pad128_t" gen-sysinfo.go > /dev/null 2>&1; then
 288   echo "type _pad128_t struct { _l [4]int32; }" >> ${OUT}
 289 fi
 290 if grep "^// type _upad128_t" gen-sysinfo.go > /dev/null 2>&1; then
 291   echo "type _upad128_t struct { _l [4]uint32; }" >> ${OUT}
 292 fi
 293
 294 # The time structures need special handling: we need to name the
 295 # types, so that we can cast integers to the right types when
 296 # assigning to the structures.
 297 timeval=`grep '^type _timeval ' gen-sysinfo.go`
 298 timeval_sec=`echo $timeval | sed -n -e 's/^.*tv_sec \([^ ]*\);.*$/\1/p'`
 299 timeval_usec=`echo $timeval | sed -n -e 's/^.*tv_usec \([^ ]*\);.*$/\1/p'`
 300 echo "type Timeval_sec_t $timeval_sec" >> ${OUT}
 301 echo "type Timeval_usec_t $timeval_usec" >> ${OUT}
 302 echo $timeval | \
 303   sed -e 's/type _timeval /type Timeval /' \
 304       -e 's/tv_sec *[a-zA-Z0-9_]*/Sec Timeval_sec_t/' \
 305       -e 's/tv_usec *[a-zA-Z0-9_]*/Usec Timeval_usec_t/' >> ${OUT}
 306 timespec=`grep '^type _timespec ' gen-sysinfo.go || true`
 307 if test "$timespec" = ""; then
 308   # IRIX 6.5 has __timespec instead.
 309   timespec=`grep '^type ___timespec ' gen-sysinfo.go || true`
 310 fi
 311 timespec_sec=`echo $timespec | sed -n -e 's/^.*tv_sec \([^ ]*\);.*$/\1/p'`
 312 timespec_nsec=`echo $timespec | sed -n -e 's/^.*tv_nsec \([^ ]*\);.*$/\1/p'`
 313 echo "type Timespec_sec_t $timespec_sec" >> ${OUT}
 314 echo "type Timespec_nsec_t $timespec_nsec" >> ${OUT}
 315 echo $timespec | \
 316   sed -e 's/^type ___timespec /type Timespec /' \
 317       -e 's/^type _timespec /type Timespec /' \
 318       -e 's/tv_sec *[a-zA-Z0-9_]*/Sec Timespec_sec_t/' \
 319       -e 's/tv_nsec *[a-zA-Z0-9_]*/Nsec Timespec_nsec_t/' >> ${OUT}
 320
 321 timestruc=`grep '^type _timestruc_t ' gen-sysinfo.go || true`
 322 if test "$timestruc" != ""; then
 323   timestruc_sec=`echo $timestruc | sed -n -e 's/^.*tv_sec \([^ ]*\);.*$/\1/p'`
 324   timestruc_nsec=`echo $timestruc | sed -n -e 's/^.*tv_nsec \([^ ]*\);.*$/\1/p'`
 325   echo "type Timestruc_sec_t $timestruc_sec" >> ${OUT}
 326   echo "type Timestruc_nsec_t $timestruc_nsec" >> ${OUT}
 327   echo $timestruc | \
 328     sed -e 's/^type _timestruc_t /type Timestruc /' \
 329         -e 's/tv_sec *[a-zA-Z0-9_]*/Sec Timestruc_sec_t/' \
 330         -e 's/tv_nsec *[a-zA-Z0-9_]*/Nsec Timestruc_nsec_t/' >> ${OUT}
 331 fi
 332
 333 # The stat type.
 334 # Prefer largefile variant if available.
 335 stat=`grep '^type _stat64 ' gen-sysinfo.go || true`
 336 if test "$stat" != ""; then
 337   grep '^type _stat64 ' gen-sysinfo.go
 338 else
 339   grep '^type _stat ' gen-sysinfo.go
 340 fi | sed -e 's/type _stat64/type Stat_t/' \
 341          -e 's/type _stat/type Stat_t/' \
 342          -e 's/st_dev/Dev/' \
 343          -e 's/st_ino/Ino/g' \
 344          -e 's/st_nlink/Nlink/' \
 345          -e 's/st_mode/Mode/' \
 346          -e 's/st_uid/Uid/' \
 347          -e 's/st_gid/Gid/' \
 348          -e 's/st_rdev/Rdev/' \
 349          -e 's/st_size/Size/' \
 350          -e 's/st_blksize/Blksize/' \
 351          -e 's/st_blocks/Blocks/' \
 352          -e 's/st_atim/Atime/' \
 353          -e 's/st_mtim/Mtime/' \
 354          -e 's/st_ctim/Ctime/' \
 355          -e 's/\([^a-zA-Z0-9_]\)_timeval\([^a-zA-Z0-9_]\)/\1Timeval\2/g' \
 356          -e 's/\([^a-zA-Z0-9_]\)_timespec_t\([^a-zA-Z0-9_]\)/\1Timespec\2/g' \
 357          -e 's/\([^a-zA-Z0-9_]\)_timespec\([^a-zA-Z0-9_]\)/\1Timespec\2/g' \
 358          -e 's/\([^a-zA-Z0-9_]\)_timestruc_t\([^a-zA-Z0-9_]\)/\1Timestruc\2/g' \
 359        >> ${OUT}
 360
 361 # The directory searching types.
 362 # Prefer largefile variant if available.
 363 dirent=`grep '^type _dirent64 ' gen-sysinfo.go || true`
 364 if test "$dirent" != ""; then
 365   grep '^type _dirent64 ' gen-sysinfo.go
 366 else
 367   grep '^type _dirent ' gen-sysinfo.go
 368 fi | sed -e 's/type _dirent64/type Dirent/' \
 369          -e 's/type _dirent/type Dirent/' \
 370          -e 's/d_name \[0+1\]/d_name [0+256]/' \
 371          -e 's/d_name/Name/' \
 372          -e 's/]int8/]byte/' \
 373          -e 's/d_ino/Ino/' \
 374          -e 's/d_off/Off/' \
 375          -e 's/d_reclen/Reclen/' \
 376          -e 's/d_type/Type/' \
 377       >> ${OUT}
 378 echo "type DIR _DIR" >> ${OUT}
 379
 380 # The rusage struct.
 381 rusage=`grep '^type _rusage struct' gen-sysinfo.go`
 382 if test "$rusage" != ""; then
 383   rusage=`echo $rusage | sed -e 's/type _rusage struct //' -e 's/[{}]//g'`
 384   rusage=`echo $rusage | sed -e 's/^ *//'`
 385   nrusage=
 386   while test -n "$rusage"; do
 387     field=`echo $rusage | sed -e 's/^\([^;]*\);.*$/\1/'`
 388     rusage=`echo $rusage | sed -e 's/^[^;]*; *\(.*\)$/\1/'`
 389     # Drop the leading ru_, capitalize the next character.
 390     field=`echo $field | sed -e 's/^ru_//'`
 391     f=`echo $field | sed -e 's/^\(.\).*$/\1/'`
 392     r=`echo $field | sed -e 's/^.\(.*\)$/\1/'`
 393     f=`echo $f | tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ`
 394     # Fix _timeval _timespec, and _timestruc_t.
 395     r=`echo $r | sed -e s'/ _timeval$/ Timeval/'`
 396     r=`echo $r | sed -e s'/ _timespec$/ Timespec/'`
 397     r=`echo $r | sed -e s'/ _timestruc_t$/ Timestruc/'`
 398     field="$f$r"
 399     nrusage="$nrusage $field;"
 400   done
 401   echo "type Rusage struct {$nrusage }" >> ${OUT}
 402 else
 403   echo "type Rusage struct {}" >> ${OUT}
 404 fi
 405
 406 # The utsname struct.
 407 grep '^type _utsname ' gen-sysinfo.go | \
 408     sed -e 's/_utsname/Utsname/' \
 409       -e 's/sysname/Sysname/' \
 410       -e 's/nodename/Nodename/' \
 411       -e 's/release/Release/' \
 412       -e 's/version/Version/' \
 413       -e 's/machine/Machine/' \
 414       -e 's/domainname/Domainname/' \
 415     >> ${OUT}
 416
 417 # The iovec struct.
 418 iovec=`grep '^type _iovec ' gen-sysinfo.go`
 419 iovec_len=`echo $iovec | sed -n -e 's/^.*iov_len \([^ ]*\);.*$/\1/p'`
 420 echo "type Iovec_len_t $iovec_len" >> ${OUT}
 421 echo $iovec | \
 422     sed -e 's/_iovec/Iovec/' \
 423       -e 's/iov_base/Base/' \
 424       -e 's/iov_len *[a-zA-Z0-9_]*/Len Iovec_len_t/' \
 425     >> ${OUT}
 426
 427 # The msghdr struct.
 428 msghdr=`grep '^type _msghdr ' gen-sysinfo.go`
 429 msghdr_controllen=`echo $msghdr | sed -n -e 's/^.*msg_controllen \([^ ]*\);.*$/\1/p'`
 430 echo "type Msghdr_controllen_t $msghdr_controllen" >> ${OUT}
 431 echo $msghdr | \
 432     sed -e 's/_msghdr/Msghdr/' \
 433       -e 's/msg_name/Name/' \
 434       -e 's/msg_namelen/Namelen/' \
 435       -e 's/msg_iov/Iov/' \
 436       -e 's/msg_iovlen/Iovlen/' \
 437       -e 's/_iovec/Iovec/' \
 438       -e 's/msg_control/Control/' \
 439       -e 's/msg_controllen *[a-zA-Z0-9_]*/Controllen Msghdr_controllen_t/' \
 440       -e 's/msg_flags/Flags/' \
 441     >> ${OUT}
 442
 443 # The ip_mreq struct
 444 grep '^type _ip_mreq ' gen-sysinfo.go | \
 445     sed -e 's/_ip_mreq/IpMreq/' \
 446       -e 's/imr_multiaddr/Multiaddr/' \
 447       -e 's/imr_interface/Interface/' \
 448       -e 's/_in_addr/[4]byte/g' \
 449     >> ${OUT}
 450
 451 # Try to guess the type to use for fd_set.
 452 fd_set=`grep '^type _fd_set ' gen-sysinfo.go || true`
 453 fds_bits_type="_C_long"
 454 if test "$fd_set" != ""; then
 455     fds_bits_type=`echo $fd_set | sed -e 's/.*[]]\([^;]*\); }$/\1/'`
 456 fi
 457 echo "type fds_bits_type $fds_bits_type" >> ${OUT}
 458
 459 exit $?