BSD 4_3_Reno release

[unix-history] / usr / src / sys / kern / makesyscalls.sh

#! /bin/sh -
#       @(#)makesyscalls.sh     7.5 (Berkeley) 6/21/90

set -e

# name of compat option:
compat=COMPAT_43

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

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

trap "rm $sysdcl $syscompat $sysent" 0

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\"
               infile = \"$1\"
               "'

               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 "%s: line %d: syscall number out of sync at %d\n", \
                  infile, NR, syscall
               printf "line is:\n"
               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
               syscall++
               next
       }
       $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
               syscall++
               next
       }
       $2 == "LIBCOMPAT" {
               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("#define\tSYS_%s\t%d\t/* compatibility; still used by libc */\n", \
                   $5, syscall) > syshdr
               syscall++
               next
       }
       $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
               syscall++
               next
       }
       $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++
               next
       }
       {
               printf "%s: line %d: unrecognized keyword %s\n", infile, NR, $2
               exit 1
       }
       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

chmod 444 $sysnames $syshdr $syssw