trying to build dash: awk and sort bugs uncovered

[Denis Vlasenko]

In case some awk guru is around:

I tried to build dash (Debian ash) and found the following.
(The same text is also attached to prevent tab mangling:
testcases have tabs in a few places)!


awk: trouble with positional variables?
echo -n "\
     3	ALIAS	ALIASCMD
     4	BG	BGCMD
" | awk '{	printf "#define %s (builtincmd + %d)\n", $3, $1}'
-bbox +coreutils:
-#define ALIASCMD3 (builtincmd + 0)
-#define BGCMD4 (builtincmd + 0)
+#define ALIASCMD (builtincmd + 3)
+#define BGCMD (builtincmd + 4)


awk: "awk: cmd. line:4: Too few arguments for builtin"
awk '{
		opt = ""
		if (NF > 2) {
			opt = substr($2, 2)
			$2 = $3
		}
		printf "\t{ \"%s\", %s, %d },\n", $1, $2,
			(opt ~ /s/) + (opt ~ /[su]/) * 2 + (opt ~ /a/) * 4
	}'
input is:
:	-s	truecmd
.	-s	dotcmd
[	testcmd
alias	-au	aliascmd
bg	-u	bgcmd
break	-s	breakcmd
...
chokes on "a a a", works on "a a" but output is not correct:
-bbox +coreutils:
-       { "aa", , 0 },
+       { "a", a, 0 },


sort -u -k 3.3: incorrect workings of -u[nigue] option:
-bbox +coreutils:
      3 alias   aliascmd
      4 bg      bgcmd
      5 break   breakcmd
-     9 continue        breakcmd
      6 cd      cdcmd
-     7 chdir   cdcmd
      8 command commandcmd
      1 .       dotcmd
     10 echo    echocmd


sort -k 1,1: doesn't seem to be important:
-bbox +coreutils:
-.      -s      dotcmd
 :      -s      truecmd
+.      -s      dotcmd
 [      testcmd
 alias  -au     aliascmd
 bg     -u      bgcmd

--
vda
-------------- next part --------------
awk: trouble with positional variables?
echo -n "\
     3	ALIAS	ALIASCMD
     4	BG	BGCMD
" | awk '{	printf "#define %s (builtincmd + %d)\n", $3, $1}'
-bbox +coreutils:
-#define ALIASCMD3 (builtincmd + 0)
-#define BGCMD4 (builtincmd + 0)
+#define ALIASCMD (builtincmd + 3)
+#define BGCMD (builtincmd + 4)


awk: "awk: cmd. line:4: Too few arguments for builtin"
awk '{
		opt = ""
		if (NF > 2) {
			opt = substr($2, 2)
			$2 = $3
		}
		printf "\t{ \"%s\", %s, %d },\n", $1, $2,
			(opt ~ /s/) + (opt ~ /[su]/) * 2 + (opt ~ /a/) * 4
	}'
input is:
:	-s	truecmd
.	-s	dotcmd
[	testcmd
alias	-au	aliascmd
bg	-u	bgcmd
break	-s	breakcmd
...
chokes on "a a a", works on "a a" but output is not correct:
-bbox +coreutils:
-       { "aa", , 0 },
+       { "a", a, 0 },


sort -u -k 3.3: incorrect workings of -u[nigue] option:
-bbox +coreutils:
      3 alias   aliascmd
      4 bg      bgcmd
      5 break   breakcmd
-     9 continue        breakcmd
      6 cd      cdcmd
-     7 chdir   cdcmd
      8 command commandcmd
      1 .       dotcmd
     10 echo    echocmd


sort -k 1,1: doesn't seem to be important:
-bbox +coreutils:
-.      -s      dotcmd
 :      -s      truecmd
+.      -s      dotcmd
 [      testcmd
 alias  -au     aliascmd
 bg     -u      bgcmd