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makesyscalls.sh revision 1.3 
      1 #! /bin/sh -
      2 #	from: @(#)makesyscalls.sh	7.6 (Berkeley) 4/20/91
      3 #	$Id: makesyscalls.sh,v 1.3 1993/05/20 02:57:57 cgd Exp $
      4 
      5 set -e
      6 
      7 # name of compat option:
      8 compat=COMPAT_43
      9 
     10 # output files:
     11 sysnames="syscalls.c"
     12 syshdr="../sys/syscall.h"
     13 syssw="init_sysent.c"
     14 
     15 # tmp files:
     16 sysdcl="sysent.dcl"
     17 syscompat="sysent.compat"
     18 sysent="sysent.switch"
     19 
     20 trap "rm $sysdcl $syscompat $sysent" 0
     21 
     22 case $# in
     23     0)	echo "Usage: $0 input-file" 1>&2
     24 	exit 1
     25 	;;
     26 esac
     27 
     28 awk < $1 "
     29 	BEGIN {
     30 		sysdcl = \"$sysdcl\"
     31 		syscompat = \"$syscompat\"
     32 		sysent = \"$sysent\"
     33 		sysnames = \"$sysnames\"
     34 		syshdr = \"$syshdr\"
     35 		compat = \"$compat\"
     36 		infile = \"$1\"
     37 		"'
     38 
     39 		printf "/*\n * System call switch table.\n *\n" > sysdcl
     40 		printf " * DO NOT EDIT-- this file is automatically generated.\n" > sysdcl
     41 
     42 		printf "\n#ifdef %s\n", compat > syscompat
     43 		printf "#define compat(n, name) n, __CONCAT(o,name)\n\n" > syscompat
     44 
     45 		printf "/*\n * System call names.\n *\n" > sysnames
     46 		printf " * DO NOT EDIT-- this file is automatically generated.\n" > sysnames
     47 
     48 		printf "/*\n * System call numbers.\n *\n" > syshdr
     49 		printf " * DO NOT EDIT-- this file is automatically generated.\n" > syshdr
     50 	}
     51 	NR == 1 {
     52 		printf " * created from%s\n */\n\n", $0 > sysdcl
     53 		printf "#include \"param.h\"\n" > sysdcl
     54 		printf "#include \"systm.h\"\n\n" > sysdcl
     55 		printf "int\tnosys();\n\n" > sysdcl
     56 
     57 		printf "struct sysent sysent[] = {\n" > sysent
     58 
     59 		printf " * created from%s\n */\n\n", $0 > sysnames
     60 		printf "char *syscallnames[] = {\n" > sysnames
     61 
     62 		printf " * created from%s\n */\n\n", $0 > syshdr
     63 		next
     64 	}
     65 	NF == 0 || $1 ~ /^;/ {
     66 		next
     67 	}
     68 	$1 ~ /^#[ 	]*if/ {
     69 		print > sysent
     70 		print > sysdcl
     71 		print > syscompat
     72 		print > sysnames
     73 		savesyscall = syscall
     74 		next
     75 	}
     76 	$1 ~ /^#[ 	]*else/ {
     77 		print > sysent
     78 		print > sysdcl
     79 		print > syscompat
     80 		print > sysnames
     81 		syscall = savesyscall
     82 		next
     83 	}
     84 	$1 ~ /^#/ {
     85 		print > sysent
     86 		print > sysdcl
     87 		print > syscompat
     88 		print > sysnames
     89 		next
     90 	}
     91 	syscall != $1 {
     92 		printf "%s: line %d: syscall number out of sync at %d\n", \
     93 		   infile, NR, syscall
     94 		printf "line is:\n"
     95 		print
     96 		exit 1
     97 	}
     98 	{	comment = $4
     99 		for (i = 5; i <= NF; i++)
    100 			comment = comment " " $i
    101 		if (NF < 5)
    102 			$5 = $4
    103 	}
    104 	$2 == "STD" {
    105 		printf("int\t%s();\n", $4) > sysdcl
    106 		printf("\t%d, %s,\t\t\t/* %d = %s */\n", \
    107 		    $3, $4, syscall, $5) > sysent
    108 		printf("\t\"%s\",\t\t\t/* %d = %s */\n", \
    109 		    $5, syscall, $5) > sysnames
    110 		printf("#define\tSYS_%s\t%d\n", \
    111 		    $5, syscall) > syshdr
    112 		syscall++
    113 		next
    114 	}
    115 	$2 == "COMPAT" {
    116 		printf("int\to%s();\n", $4) > syscompat
    117 		printf("\tcompat(%d,%s),\t\t/* %d = old %s */\n", \
    118 		    $3, $4, syscall, $5) > sysent
    119 		printf("\t\"old.%s\",\t\t/* %d = old %s */\n", \
    120 		    $5, syscall, $5) > sysnames
    121 		printf("\t\t\t\t/* %d is old %s */\n", \
    122 		    syscall, comment) > syshdr
    123 		syscall++
    124 		next
    125 	}
    126 	$2 == "LIBCOMPAT" {
    127 		printf("int\to%s();\n", $4) > syscompat
    128 		printf("\tcompat(%d,%s),\t\t/* %d = old %s */\n", \
    129 		    $3, $4, syscall, $5) > sysent
    130 		printf("\t\"old.%s\",\t\t/* %d = old %s */\n", \
    131 		    $5, syscall, $5) > sysnames
    132 		printf("#define\tSYS_%s\t%d\t/* compatibility; still used by libc */\n", \
    133 		    $5, syscall) > syshdr
    134 		syscall++
    135 		next
    136 	}
    137 	$2 == "OBSOL" {
    138 		printf("\t0, nosys,\t\t\t/* %d = obsolete %s */\n", \
    139 		    syscall, comment) > sysent
    140 		printf("\t\"obs_%s\",\t\t\t/* %d = obsolete %s */\n", \
    141 		    $4, syscall, comment) > sysnames
    142 		printf("\t\t\t\t/* %d is obsolete %s */\n", \
    143 		    syscall, comment) > syshdr
    144 		syscall++
    145 		next
    146 	}
    147 	$2 == "UNIMPL" {
    148 		printf("\t0, nosys,\t\t\t/* %d = %s */\n", \
    149 		    syscall, comment) > sysent
    150 		printf("\t\"#%d\",\t\t\t/* %d = %s */\n", \
    151 		    syscall, syscall, comment) > sysnames
    152 		syscall++
    153 		next
    154 	}
    155 	{
    156 		printf "%s: line %d: unrecognized keyword %s\n", infile, NR, $2
    157 		exit 1
    158 	}
    159 	END {
    160 		printf("\n#else /* %s */\n", compat) > syscompat
    161 		printf("#define compat(n, name) 0, nosys\n") > syscompat
    162 		printf("#endif /* %s */\n\n", compat) > syscompat
    163 
    164 		printf("};\n\n") > sysent
    165 		printf("int\tnsysent = sizeof(sysent) / sizeof(sysent[0]);\n") > sysent
    166 
    167 		printf("};\n") > sysnames
    168 	} '
    169 
    170 cat $sysdcl $syscompat $sysent >$syssw
    171 
    172 #chmod 444 $sysnames $syshdr $syssw
    173