#! /bin/sh -
#	@(#)makesyscalls.sh	7.1 (Berkeley) 04/08/89

# name of compat option:
compat=COMPAT_43

# output files:
sysnames="syscalls.c"
syshdr="syscall.h"
syssw="init_sysent.c"

# tmp files:
sysdcl="sysent.dcl"
syscompat="sysent.compat"
sysent="sysent.switch"

case $# in
    0)	echo "Usage: $0 input-file" 1>&2
	exit 1
	;;
esac

awk < $1 "
	BEGIN { 
		sysdcl = \"$sysdcl\"
		syscompat = \"$syscompat\"
		sysent = \"$sysent\"
		sysnames = \"$sysnames\"
		syshdr = \"$syshdr\"
		compat = \"$compat\"
		"'

		printf "/*\n * System call switch table.\n *\n" > sysdcl
		printf " * DO NOT EDIT-- this file is automatically generated.\n" > sysdcl

		printf "\n#ifdef %s\n", compat > syscompat
		printf "#define compat(n, name) n, o/**/name\n\n" > syscompat

		printf "/*\n * System call names.\n *\n" > sysnames
		printf " * DO NOT EDIT-- this file is automatically generated.\n" > sysnames

		printf "/*\n * System call numbers.\n *\n" > syshdr
		printf " * DO NOT EDIT-- this file is automatically generated.\n" > syshdr
	} 
	NR == 1 {
		printf " * created from%s\n */\n\n", $0 > sysdcl
		printf "#include \"param.h\"\n" > sysdcl
		printf "#include \"systm.h\"\n\n" > sysdcl
		printf "int\tnosys();\n\n" > sysdcl

		printf "struct sysent sysent[] = {\n" > sysent

		printf " * created from%s\n */\n\n", $0 > sysnames
		printf "char *syscallnames[] = {\n" > sysnames

		printf " * created from%s\n */\n\n", $0 > syshdr
		next
	}
	NF == 0 || $1 ~ /^;/ { 
		next
	}
	$1 ~ /^#[ 	]*if/ { 
		print > sysent
		print > sysdcl
		print > syscompat
		print > sysnames
		savesyscall = syscall
		next
	} 
	$1 ~ /^#[ 	]*else/ { 
		print > sysent
		print > sysdcl
		print > syscompat
		print > sysnames
		syscall = savesyscall
		next
	} 
	$1 ~ /^#/ { 
		print > sysent
		print > sysdcl
		print > syscompat
		print > sysnames
		next
	} 
	syscall != $1 { 
		printf "syscall number out of sync at %d; line is:\n", syscall
		print
		exit 1
	} 
	{	comment = $4
		for (i = 5; i <= NF; i++) 
			comment = comment " " $i
		if (NF < 5) 
			$5 = $4
	} 
	$2 == "STD" { 
		printf("int\t%s();\n", $4) > sysdcl
		printf("\t%d, %s,\t\t\t/* %d = %s */\n", \
		    $3, $4, syscall, $5) > sysent
		printf("\t\"%s\",\t\t\t/* %d = %s */\n", \
		    $5, syscall, $5) > sysnames
		printf("#define\tSYS_%s\t%d\n", \
		    $5, syscall) > syshdr
	} 
	$2 == "COMPAT" { 
		printf("int\to%s();\n", $4) > syscompat
		printf("\tcompat(%d,%s),\t\t/* %d = old %s */\n", \
		    $3, $4, syscall, $5) > sysent
		printf("\t\"old %s\",\t\t/* %d = old %s */\n", \
		    $5, syscall, $5) > sysnames
		printf("\t\t\t\t/* %d is old %s */\n", \
		    syscall, comment) > syshdr
	} 
	$2 == "OBSOL" { 
		printf("\t0, nosys,\t\t\t/* %d = obsolete %s */\n", \
		    syscall, comment) > sysent
		printf("\t\"obs %s\",\t\t\t/* %d = obsolete %s */\n", \
		    $4, syscall, comment) > sysnames
		printf("\t\t\t\t/* %d is obsolete %s */\n", \
		    syscall, comment) > syshdr
	} 
	$2 == "UNIMPL" { 
		printf("\t0, nosys,\t\t\t/* %d = %s */\n", \
		    syscall, comment) > sysent
		printf("\t\"#%d\",\t\t\t/* %d = %s */\n", \
		    syscall, syscall, comment) > sysnames
	} 
	{ syscall++ }
	END { 
		printf("\n#else /* %s */\n", compat) > syscompat
		printf("#define compat(n, name) 0, nosys\n") > syscompat
		printf("#endif /* %s */\n\n", compat) > syscompat

		printf("};\n\n") > sysent
		printf("int\tnsysent = sizeof(sysent) / sizeof(sysent[0]);\n") > sysent

		printf("};\n") > sysnames
	} '

cat $sysdcl $syscompat $sysent >$syssw
rm $sysdcl $syscompat $sysent