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siglist.sh revision 1.13 
      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 
      8 set -e
      9 
     10 : ${AWK:=awk}
     11 : ${SED:=sed}
     12 
     13 in=tmpi$$.c
     14 out=tmpo$$.c
     15 ecode=1
     16 trapsigs='0 1 2 13 15'
     17 trap 'rm -f $in $out; trap 0; exit $ecode' $trapsigs
     18 
     19 CPP="${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
     28 echo '	{ 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"'
     47 ecode=0
     48