bin/sh/mkbuiltins

   1 #!/bin/sh -
   2
   3 #-
   4 # Copyright (c) 1991, 1993
   5 #       The Regents of the University of California.  All rights reserved.
   6 #
   7 # This code is derived from software contributed to Berkeley by
   8 # Kenneth Almquist.
   9 #
  10 # Redistribution and use in source and binary forms, with or without
  11 # modification, are permitted provided that the following conditions
  12 # are met:
  13 # 1. Redistributions of source code must retain the above copyright
  14 #    notice, this list of conditions and the following disclaimer.
  15 # 2. Redistributions in binary form must reproduce the above copyright
  16 #    notice, this list of conditions and the following disclaimer in the
  17 #    documentation and/or other materials provided with the distribution.
  18 # 3. Neither the name of the University nor the names of its contributors
  19 #    may be used to endorse or promote products derived from this software
  20 #    without specific prior written permission.
  21 #
  22 # THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  23 # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24 # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25 # ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  26 # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28 # OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29 # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30 # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31 # OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32 # SUCH DAMAGE.
  33 #
  34 #       @(#)mkbuiltins  8.2 (Berkeley) 5/4/95
  35 # $FreeBSD: head/bin/sh/mkbuiltins 360210 2020-04-22 21:45:43Z jilles $
  36
  37 temp=`mktemp -t ka`
  38 srcdir=$1
  39 havejobs=0
  40 if grep '^#define[       ]*JOBS[         ]*1' $srcdir/shell.h > /dev/null
  41 then    havejobs=1
  42 fi
  43 exec > builtins.c
  44 cat <<\!
  45 /*
  46  * This file was generated by the mkbuiltins program.
  47  */
  48
  49 #include <stdlib.h>
  50 #include "shell.h"
  51 #include "builtins.h"
  52
  53 !
  54 awk '/^[^#]/ {if('$havejobs' || $2 != "-j") \
  55     print $0}' $srcdir/builtins.def | sed 's/-j//' > $temp
  56 echo 'int (*const builtinfunc[])(int, char **) = {'
  57 awk '/^[^#]/ {  printf "\t%s,\n", $1}' $temp
  58 echo '};
  59
  60 const unsigned char builtincmd[] = {'
  61 awk '{  for (i = 2 ; i <= NF ; i++) {
  62                 if ($i == "-s") {
  63                         spc = 1;
  64                 } else if ($i == "-n") {
  65                         # Handled later for builtins.h
  66                         continue
  67                 } else {
  68                         printf "\t\"\\%03o\\%03o%s\"\n", length($i), (spc ? 128 : 0) + NR-1, $i
  69                         spc = 0;
  70                 }
  71         }}' $temp
  72 echo '};'
  73
  74 exec > builtins.h
  75 cat <<\!
  76 /*
  77  * This file was generated by the mkbuiltins program.
  78  */
  79
  80 #include <sys/cdefs.h>
  81 !
  82 tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ < $temp |
  83         awk '{  printf "#define %s %d\n", $1, NR-1}'
  84 echo '
  85 #define BUILTIN_SPECIAL 0x80
  86
  87 extern int (*const builtinfunc[])(int, char **);
  88 extern const unsigned char builtincmd[];
  89 '
  90 awk '{  printf "int %s(int, char **);\n", $1}' $temp
  91
  92 # Build safe_builtin_always()
  93 cat <<EOF
  94
  95 static inline int
  96 safe_builtin_always(int idx)
  97 {
  98 EOF
  99 awk '
 100 BEGIN { printed = 0 }
 101 {
 102         for (i = 2 ; i <= NF ; i++) {
 103                 if ($i == "-s") {
 104                         continue
 105                 } else if ($i == "-n") {
 106                         nofork = 1;
 107                 } else {
 108                         if (nofork == 0) {
 109                                 continue
 110                         }
 111                         if (printed == 1) {
 112                                 printf " || \n\t    "
 113                         } else {
 114                                 printf "\tif ("
 115                         }
 116                         printf "idx == " toupper($1)
 117                         printed = 1
 118                         nofork = 0;
 119                         # Only need to check each once
 120                         break
 121                 }
 122         }
 123 }' $temp
 124
 125 cat << EOF
 126 )
 127                 return (1);
 128         return(0);
 129 }
 130 EOF
 131
 132 rm -f $temp