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.go
  25
  26 rm -f sysinfo.c
  27 cat > sysinfo.c <<EOF
  28 #include "config.h"
  29 #include <sys/types.h>
  30 #include <dirent.h>
  31 #include <errno.h>
  32 #include <fcntl.h>
  33 #include <netinet/in.h>
  34 #include <netinet/tcp.h>
  35 #include <signal.h>
  36 #if defined(HAVE_SYSCALL_H)
  37 #include <syscall.h>
  38 #endif
  39 #if defined(HAVE_SYS_EPOLL_H)
  40 #include <sys/epoll.h>
  41 #endif
  42 #if defined(HAVE_SYS_PTRACE_H)
  43 #include <sys/ptrace.h>
  44 #endif
  45 #include <sys/resource.h>
  46 #include <sys/socket.h>
  47 #include <sys/stat.h>
  48 #include <sys/time.h>
  49 #include <sys/wait.h>
  50 #include <sys/un.h>
  51 #if defined(HAVE_SYS_USER_H)
  52 #include <sys/user.h>
  53 #endif
  54 #if defined(HAVE_SYS_UTSNAME_H)
  55 #include <sys/utsname.h>
  56 #endif
  57 #include <unistd.h>
  58 EOF
  59
  60 ${CC} -D_GNU_SOURCE -fdump-go-spec=gen-sysinfo.go -S -o sysinfo.s sysinfo.c
  61
  62 echo 'package syscall' > ${OUT}
  63
  64 # Get all the consts and types, skipping ones which could not be
  65 # represented in Go and ones which we need to rewrite.  We also skip
  66 # function declarations, as we don't need them here.  All the symbols
  67 # will all have a leading underscore.
  68 grep -v '^// ' gen-sysinfo.go | \
  69   grep -v '^func' | \
  70   grep -v '^type _timeval ' | \
  71   grep -v '^type _timespec ' | \
  72   grep -v '^type _timestruc_t ' | \
  73   grep -v '^type _epoll_' | \
  74   grep -v 'in6_addr' | \
  75   grep -v 'sockaddr_in6' | \
  76   sed -e 's/\([^a-zA-Z0-9_]\)_timeval\([^a-zA-Z0-9_]\)/\1Timeval\2/g' \
  77       -e 's/\([^a-zA-Z0-9_]\)_timespec\([^a-zA-Z0-9_]\)/\1Timespec\2/g' \
  78       -e 's/\([^a-zA-Z0-9_]\)_timestruc_t\([^a-zA-Z0-9_]\)/\1Timestruc\2/g' \
  79     >> ${OUT}
  80
  81 # The errno constants.
  82 grep '^const _E' gen-sysinfo.go | \
  83   sed -e 's/^\(const \)_\(E[^= ]*\)\(.*\)$/\1\2 = _\2/' >> ${OUT}
  84
  85 # The O_xxx flags.
  86 grep '^const _\(O\|F\|FD\)_' gen-sysinfo.go | \
  87   sed -e 's/^\(const \)_\([^= ]*\)\(.*\)$/\1\2 = _\2/' >> ${OUT}
  88 if ! grep '^const O_ASYNC' ${OUT} >/dev/null 2>&1; then
  89   echo "const O_ASYNC = 0" >> ${OUT}
  90 fi
  91 if ! grep '^const O_CLOEXEC' ${OUT} >/dev/null 2>&1; then
  92   echo "const O_CLOEXEC = 0" >> ${OUT}
  93 fi
  94
  95 # The signal numbers.
  96 grep '^const _SIG[^_]' gen-sysinfo.go | \
  97   grep -v '^const _SIGEV_' | \
  98   sed -e 's/^\(const \)_\(SIG[^= ]*\)\(.*\)$/\1\2 = _\2/' >> ${OUT}
  99
 100 # The syscall numbers.  We force the names to upper case.
 101 grep '^const _SYS_' gen-sysinfo.go | \
 102   sed -e 's/const _\(SYS_[^= ]*\).*$/\1/' | \
 103   while read sys; do
 104     sup=`echo $sys | tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ`
 105     echo "const $sup = _$sys" >> ${OUT}
 106   done
 107
 108 # Stat constants.
 109 grep '^const _S_' gen-sysinfo.go | \
 110   sed -e 's/^\(const \)_\(S_[^= ]*\)\(.*\)$/\1\2 = _\2/' >> ${OUT}
 111
 112 # Process status constants.
 113 grep '^const _W' gen-sysinfo.go |
 114   sed -e 's/^\(const \)_\(W[^= ]*\)\(.*\)$/\1\2 = _\2/' >> ${OUT}
 115 # WSTOPPED was introduced in glibc 2.3.4.
 116 if ! grep '^const _WSTOPPED = ' gen-sysinfo.go >/dev/null 2>&1; then
 117   if grep '^const _WUNTRACED = ' gen-sysinfo.go > /dev/null 2>&1; then
 118     echo 'const WSTOPPED = _WUNTRACED' >> ${OUT}
 119   else
 120     echo 'const WSTOPPED = 2' >> ${OUT}
 121   fi
 122 fi
 123 if grep '^const ___WALL = ' gen-sysinfo.go >/dev/null 2>&1 \
 124    && ! grep '^const _WALL = ' gen-sysinfo.go >/dev/null 2>&1; then
 125   echo 'const WALL = ___WALL' >> ${OUT}
 126 fi
 127
 128 # Networking constants.
 129 grep '^const _\(AF\|SOCK\|SOL\|SO\|IPPROTO\|TCP\|IP\|IPV6\)_' gen-sysinfo.go |
 130   sed -e 's/^\(const \)_\([^= ]*\)\(.*\)$/\1\2 = _\2/' >> ${OUT}
 131 grep '^const _SOMAXCONN' gen-sysinfo.go |
 132   sed -e 's/^\(const \)_\(SOMAXCONN[^= ]*\)\(.*\)$/\1\2 = _\2/' \
 133     >> ${OUT}
 134 grep '^const _SHUT_' gen-sysinfo.go |
 135   sed -e 's/^\(const \)_\(SHUT[^= ]*\)\(.*\)$/\1\2 = _\2/' >> ${OUT}
 136
 137 # pathconf constants.
 138 grep '^const __PC' gen-sysinfo.go |
 139   sed -e 's/^\(const \)__\(PC[^= ]*\)\(.*\)$/\1\2 = __\2/' >> ${OUT}
 140
 141 # The epoll constants were picked up by the errno constants, but we
 142 # need to be sure the EPOLLRDHUP is defined.
 143 if ! grep '^const EPOLLRDHUP' ${OUT} >/dev/null 2>&1; then
 144   echo "const EPOLLRDHUP = 0x2000" >> ${OUT}
 145 fi
 146
 147 # Ptrace constants.  We don't expose all the PTRACE flags, just the
 148 # PTRACE_O_xxx and PTRACE_EVENT_xxx ones.
 149 grep '^const _PTRACE_O' gen-sysinfo.go |
 150   sed -e 's/^\(const \)_\(PTRACE_O[^= ]*\)\(.*\)$/\1\2 = _\2/' >> ${OUT}
 151 grep '^const _PTRACE_EVENT' gen-sysinfo.go |
 152   sed -e 's/^\(const \)_\(PTRACE_EVENT[^= ]*\)\(.*\)$/\1\2 = _\2/' >> ${OUT}
 153 # We need PTRACE_SETOPTIONS and PTRACE_GETEVENTMSG, but they are not
 154 # defined in older versions of glibc.
 155 if ! grep '^const _PTRACE_SETOPTIONS' ${OUT} > /dev/null 2>&1; then
 156   echo "const _PTRACE_SETOPTIONS = 0x4200" >> ${OUT}
 157 fi
 158 if ! grep '^const PTRACE_O_TRACESYSGOOD' ${OUT} > /dev/null 2>&1; then
 159   echo "const PTRACE_O_TRACESYSGOOD = 0x1" >> ${OUT}
 160 fi
 161 if ! grep '^const PTRACE_O_TRACEFORK' ${OUT} > /dev/null 2>&1; then
 162   echo "const PTRACE_O_TRACEFORK = 0x2" >> ${OUT}
 163 fi
 164 if ! grep '^const PTRACE_O_TRACEVFORK' ${OUT} > /dev/null 2>&1; then
 165   echo "const PTRACE_O_TRACEVFORK = 0x4" >> ${OUT}
 166 fi
 167 if ! grep '^const PTRACE_O_TRACECLONE' ${OUT} > /dev/null 2>&1; then
 168   echo "const PTRACE_O_TRACECLONE = 0x8" >> ${OUT}
 169 fi
 170 if ! grep '^const PTRACE_O_TRACEEXEC' ${OUT} > /dev/null 2>&1; then
 171   echo "const PTRACE_O_TRACEEXEC = 0x10" >> ${OUT}
 172 fi
 173 if ! grep '^const PTRACE_O_TRACEVFORKDONE' ${OUT} > /dev/null 2>&1; then
 174   echo "const PTRACE_O_TRACEVFORKDONE = 0x20" >> ${OUT}
 175 fi
 176 if ! grep '^const PTRACE_O_TRACEEXIT' ${OUT} > /dev/null 2>&1; then
 177   echo "const PTRACE_O_TRACEEXIT = 0x40" >> ${OUT}
 178 fi
 179 if ! grep '^const PTRACE_O_MASK' ${OUT} > /dev/null 2>&1; then
 180   echo "const PTRACE_O_MASK = 0x7f" >> ${OUT}
 181 fi
 182 if ! grep '^const _PTRACE_GETEVENTMSG' ${OUT} > /dev/null 2>&1; then
 183   echo "const _PTRACE_GETEVENTMSG = 0x4201" >> ${OUT}
 184 fi
 185 if ! grep '^const PTRACE_EVENT_FORK' ${OUT} > /dev/null 2>&1; then
 186   echo "const PTRACE_EVENT_FORK = 1" >> ${OUT}
 187 fi
 188 if ! grep '^const PTRACE_EVENT_VFORK' ${OUT} > /dev/null 2>&1; then
 189   echo "const PTRACE_EVENT_VFORK = 2" >> ${OUT}
 190 fi
 191 if ! grep '^const PTRACE_EVENT_CLONE' ${OUT} > /dev/null 2>&1; then
 192   echo "const PTRACE_EVENT_CLONE = 3" >> ${OUT}
 193 fi
 194 if ! grep '^const PTRACE_EVENT_EXEC' ${OUT} > /dev/null 2>&1; then
 195   echo "const PTRACE_EVENT_EXEC = 4" >> ${OUT}
 196 fi
 197 if ! grep '^const PTRACE_EVENT_VFORK_DONE' ${OUT} > /dev/null 2>&1; then
 198   echo "const PTRACE_EVENT_VFORK_DONE = 5" >> ${OUT}
 199 fi
 200 if ! grep '^const PTRACE_EVENT_EXIT' ${OUT} > /dev/null 2>&1; then
 201   echo "const PTRACE_EVENT_EXIT = 6" >> ${OUT}
 202 fi
 203 if ! grep '^const _PTRACE_TRACEME' ${OUT} > /dev/null 2>&1; then
 204   echo "const _PTRACE_TRACEME = 0" >> ${OUT}
 205 fi
 206
 207 # The registers returned by PTRACE_GETREGS.  This is probably
 208 # GNU/Linux specific; it should do no harm if there is no
 209 # _user_regs_struct.
 210 regs=`grep '^type _user_regs_struct struct' gen-sysinfo.go || true`
 211 if test "$regs" != ""; then
 212   regs=`echo $regs | sed -e 's/type _user_regs_struct struct //' -e 's/[{}]//g'`
 213   regs=`echo $regs | sed -e s'/^ *//'`
 214   nregs=
 215   while test -n "$regs"; do
 216     field=`echo $regs | sed -e 's/^\([^;]*\);.*$/\1/'`
 217     regs=`echo $regs | sed -e 's/^[^;]*; *\(.*\)$/\1/'`
 218     # Capitalize the first character of the field.
 219     f=`echo $field | sed -e 's/^\(.\).*$/\1/'`
 220     r=`echo $field | sed -e 's/^.\(.*\)$/\1/'`
 221     f=`echo $f | tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ`
 222     field="$f$r"
 223     nregs="$nregs $field;"
 224   done
 225   echo "type PtraceRegs struct {$nregs }" >> ${OUT}
 226 fi
 227
 228 # Some basic types.
 229 echo 'type Size_t _size_t' >> ${OUT}
 230 echo "type Ssize_t _ssize_t" >> ${OUT}
 231 if grep '^const _HAVE_OFF64_T = ' gen-sysinfo.go > /dev/null 2>&1; then
 232   echo "type Offset_t _off64_t" >> ${OUT}
 233 else
 234   echo "type Offset_t _off_t" >> ${OUT}
 235 fi
 236 echo "type Mode_t _mode_t" >> ${OUT}
 237 echo "type Pid_t _pid_t" >> ${OUT}
 238 echo "type Uid_t _uid_t" >> ${OUT}
 239 echo "type Gid_t _gid_t" >> ${OUT}
 240 echo "type Socklen_t _socklen_t" >> ${OUT}
 241
 242 # The long type, needed because that is the type that ptrace returns.
 243 sizeof_long=`grep '^const ___SIZEOF_LONG__ = ' gen-sysinfo.go | sed -e 's/.*= //'`
 244 if test "$sizeof_long" = "4"; then
 245   echo "type _C_long int32" >> ${OUT}
 246 elif test "$sizeof_long" = "8"; then
 247   echo "type _C_long int64" >> ${OUT}
 248 else
 249   echo 1>&2 "mksysinfo.sh: could not determine size of long (got $sizeof_long)"
 250   exit 1
 251 fi
 252
 253 # Solaris 2 needs _u?pad128_t, but its default definition in terms of long
 254 # double is commented by -fdump-go-spec.
 255 if grep "^// type _pad128_t" gen-sysinfo.go > /dev/null 2>&1; then
 256   echo "type _pad128_t struct { _l [4]int32; }" >> ${OUT}
 257 fi
 258 if grep "^// type _upad128_t" gen-sysinfo.go > /dev/null 2>&1; then
 259   echo "type _upad128_t struct { _l [4]uint32; }" >> ${OUT}
 260 fi
 261
 262 # The time structures need special handling: we need to name the
 263 # types, so that we can cast integers to the right types when
 264 # assigning to the structures.
 265 timeval=`grep '^type _timeval ' gen-sysinfo.go`
 266 timeval_sec=`echo $timeval | sed -n -e 's/^.*tv_sec \([^ ]*\);.*$/\1/p'`
 267 timeval_usec=`echo $timeval | sed -n -e 's/^.*tv_usec \([^ ]*\);.*$/\1/p'`
 268 echo "type Timeval_sec_t $timeval_sec" >> ${OUT}
 269 echo "type Timeval_usec_t $timeval_usec" >> ${OUT}
 270 echo $timeval | \
 271   sed -e 's/type _timeval /type Timeval /' \
 272       -e 's/tv_sec *[a-zA-Z0-9_]*/Sec Timeval_sec_t/' \
 273       -e 's/tv_usec *[a-zA-Z0-9_]*/Usec Timeval_usec_t/' >> ${OUT}
 274 timespec=`grep '^type _timespec ' gen-sysinfo.go`
 275 timespec_sec=`echo $timespec | sed -n -e 's/^.*tv_sec \([^ ]*\);.*$/\1/p'`
 276 timespec_nsec=`echo $timespec | sed -n -e 's/^.*tv_nsec \([^ ]*\);.*$/\1/p'`
 277 echo "type Timespec_sec_t $timespec_sec" >> ${OUT}
 278 echo "type Timespec_nsec_t $timespec_nsec" >> ${OUT}
 279 echo $timespec | \
 280   sed -e 's/^type _timespec /type Timespec /' \
 281       -e 's/tv_sec *[a-zA-Z0-9_]*/Sec Timespec_sec_t/' \
 282       -e 's/tv_nsec *[a-zA-Z0-9_]*/Nsec Timespec_nsec_t/' >> ${OUT}
 283
 284 timestruc=`grep '^type _timestruc_t ' gen-sysinfo.go || true`
 285 if test "$timestruc" != ""; then
 286   timestruc_sec=`echo $timestruc | sed -n -e 's/^.*tv_sec \([^ ]*\);.*$/\1/p'`
 287   timestruc_nsec=`echo $timestruc | sed -n -e 's/^.*tv_nsec \([^ ]*\);.*$/\1/p'`
 288   echo "type Timestruc_sec_t $timestruc_sec" >> ${OUT}
 289   echo "type Timestruc_nsec_t $timestruc_nsec" >> ${OUT}
 290   echo $timestruc | \
 291     sed -e 's/^type _timestruc_t /type Timestruc /' \
 292         -e 's/tv_sec *[a-zA-Z0-9_]*/Sec Timestruc_sec_t/' \
 293         -e 's/tv_nsec *[a-zA-Z0-9_]*/Nsec Timestruc_nsec_t/' >> ${OUT}
 294 fi
 295
 296 # The stat type.
 297 grep 'type _stat ' gen-sysinfo.go | \
 298   sed -e 's/type _stat/type Stat_t/' \
 299       -e 's/st_dev/Dev/' \
 300       -e 's/st_ino/Ino/' \
 301       -e 's/st_nlink/Nlink/' \
 302       -e 's/st_mode/Mode/' \
 303       -e 's/st_uid/Uid/' \
 304       -e 's/st_gid/Gid/' \
 305       -e 's/st_rdev/Rdev/' \
 306       -e 's/st_size/Size/' \
 307       -e 's/st_blksize/Blksize/' \
 308       -e 's/st_blocks/Blocks/' \
 309       -e 's/st_atim/Atime/' \
 310       -e 's/st_mtim/Mtime/' \
 311       -e 's/st_ctim/Ctime/' \
 312       -e 's/\([^a-zA-Z0-9_]\)_timeval\([^a-zA-Z0-9_]\)/\1Timeval\2/g' \
 313       -e 's/\([^a-zA-Z0-9_]\)_timespec\([^a-zA-Z0-9_]\)/\1Timespec\2/g' \
 314       -e 's/\([^a-zA-Z0-9_]\)_timestruc_t\([^a-zA-Z0-9_]\)/\1Timestruc\2/g' \
 315     >> ${OUT}
 316
 317 # The directory searching types.
 318 grep '^type _dirent ' gen-sysinfo.go | \
 319   sed -e 's/type _dirent/type Dirent/' \
 320       -e 's/d_name/Name/' \
 321       -e 's/]int8/]byte/' \
 322       -e 's/d_ino/Ino/' \
 323       -e 's/d_off/Off/' \
 324       -e 's/d_reclen/Reclen/' \
 325       -e 's/d_type/Type/' \
 326     >> ${OUT}
 327 echo "type DIR _DIR" >> ${OUT}
 328
 329 # The rusage struct.
 330 rusage=`grep '^type _rusage struct' gen-sysinfo.go`
 331 if test "$rusage" != ""; then
 332   rusage=`echo $rusage | sed -e 's/type _rusage struct //' -e 's/[{}]//g'`
 333   rusage=`echo $rusage | sed -e 's/^ *//'`
 334   nrusage=
 335   while test -n "$rusage"; do
 336     field=`echo $rusage | sed -e 's/^\([^;]*\);.*$/\1/'`
 337     rusage=`echo $rusage | sed -e 's/^[^;]*; *\(.*\)$/\1/'`
 338     # Drop the leading ru_, capitalize the next character.
 339     field=`echo $field | sed -e 's/^ru_//'`
 340     f=`echo $field | sed -e 's/^\(.\).*$/\1/'`
 341     r=`echo $field | sed -e 's/^.\(.*\)$/\1/'`
 342     f=`echo $f | tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ`
 343     # Fix _timeval _timespec, and _timestruc_t.
 344     r=`echo $r | sed -e s'/ _timeval$/ Timeval/'`
 345     r=`echo $r | sed -e s'/ _timespec$/ Timespec/'`
 346     r=`echo $r | sed -e s'/ _timestruc_t$/ Timestruc/'`
 347     field="$f$r"
 348     nrusage="$nrusage $field;"
 349   done
 350   echo "type Rusage struct {$nrusage }" >> ${OUT}
 351 fi
 352
 353 # The utsname struct.
 354 grep '^type _utsname ' gen-sysinfo.go | \
 355     sed -e 's/_utsname/Utsname/' \
 356       -e 's/sysname/Sysname/' \
 357       -e 's/nodename/Nodename/' \
 358       -e 's/release/Release/' \
 359       -e 's/version/Version/' \
 360       -e 's/machine/Machine/' \
 361       -e 's/domainname/Domainname/' \
 362     >> ${OUT}
 363
 364 mv -f ${OUT} sysinfo.go
 365 exit $?