1#!/bin/sh
2#	$NetBSD: siglist.sh,v 1.13 2021/02/23 01:31:30 christos Exp $
3#
4# Script to generate a sorted, complete list of signals, suitable
5# for inclusion in trap.c as array initializer.
6#
7
8set -e
9
10: ${AWK:=awk}
11: ${SED:=sed}
12
13in=tmpi$$.c
14out=tmpo$$.c
15ecode=1
16trapsigs='0 1 2 13 15'
17trap 'rm -f $in $out; trap 0; exit $ecode' $trapsigs
18
19CPP="${1-cc -E}"
20
21# The trap here to make up for a bug in bash (1.14.3(1)) that calls the trap
22(trap $trapsigs;
23 echo '#include "sh.h"';
24 echo ' { QwErTy /* dummy for sed sillies */ },';
25 ${SED} -e '/^[	 ]*#/d' -e 's/^[	 ]*\([^ 	][^ 	]*\)[	 ][	 ]*\(.*[^ 	]\)[ 	]*$/#ifdef SIG\1\
26	{ QwErTy .signal = SIG\1 , .name = "\1", .mess = "\2" },\
27#endif/') > $in
28echo '	{ QwErTy .signal = SIGNALS , .name = "DUMMY", .mess = "hook to expand array to total signals" },' >> $in
29# work around for gcc > 5
30$CPP $in | grep -v '^#' | tr -d '\n' | ${SED} 's/},/},\
31/g' > $out
32${SED} -n 's/{ QwErTy/{/p' < $out | ${AWK} '{print NR, $0}' | sort -k 5n -k 1n |
33    ${SED} -E -e 's/^[0-9]* //' -e 's/ +/ /' |
34    ${AWK} 'BEGIN { last=0; }
35	{
36	    if ($4 ~ /^[0-9][0-9]*$/ && $5 == ",") {
37		n = $4;
38		if (n > 0 && n != last) {
39		    while (++last < n) {
40			printf "\t{ .signal = %d , .name = NULL, .mess = `Signal %d` } ,\n", last, last;
41		    }
42		    print;
43		}
44	    }
45	}' |
46    tr '`' '"' | grep -v '"DUMMY"'
47ecode=0
48