14277 Improve shell lint checks

Reviewed by: Robert Mustacchi <rm+illumos@fingolfin.org>
Approved by: Dan McDonald <danmcd@joyent.com>

3 files changed, 35 insertions, 30 deletions

diff --git a/usr/src/contrib/ast/src/cmd/ksh93/data/lexstates.c b/usr/src/contrib/ast/src/cmd/ksh93/data/lexstates.c
index 01e56f5471..d3ac0d5b50 100644
--- a/usr/src/contrib/ast/src/cmd/ksh93/data/lexstates.c
+++ b/usr/src/contrib/ast/src/cmd/ksh93/data/lexstates.c
@@ -393,14 +393,13 @@ const char e_lexsyntax2[]	= "syntax error: `%s' %s";
 const char e_lexsyntax3[]	= "syntax error at line %d: duplicate label %s";
 const char e_lexsyntax4[]	= "syntax error at line %d: invalid reference list";
 const char e_lexsyntax5[]	= "syntax error at line %d: `<<%s' here-document not contained within command substitution";
-const char e_lexwarnvar[]	= "line %d: in '((%s))', using '$' is unnecessary, incurs a penalty and can introduce rounding errors.";
+const char e_lexwarnvar[]	= "line %d: in '((%s))', using '$' as in '$%.*s' is slower and can introduce rounding errors";
 const char e_lexlabignore[]	= "line %d: label %s ignored";
 const char e_lexlabunknown[]	= "line %d: %s unknown label";
 const char e_lexobsolete1[]	= "line %d: `...` obsolete, use $(...)";
 const char e_lexobsolete2[]	= "line %d: -a obsolete, use -e";
 const char e_lexobsolete3[]	= "line %d: '=' obsolete, use '=='";
-const char e_lexobsolete4[]	= "line %d: %s within [[...]] obsolete, use ((...))";
-const char e_lexobsolete4b[]	= "line %d: [[... %s ...]] obsolete, use ((... %s ...))";
+const char e_lexobsolete4[]	= "line %d: [[... %s ...]] obsolete, use ((... %s ...))";
 const char e_lexobsolete5[]	= "line %d: set %s obsolete";
 const char e_lexobsolete6[]	= "line %d: `{' instead of `in' is obsolete";
 const char e_lexnonstandard[]	= "line %d: `&>file' is nonstandard -- interpreted as `>file 2>&1' for profile input only";
diff --git a/usr/src/contrib/ast/src/cmd/ksh93/sh/lex.c b/usr/src/contrib/ast/src/cmd/ksh93/sh/lex.c
index b517246167..5c79af45a3 100644
--- a/usr/src/contrib/ast/src/cmd/ksh93/sh/lex.c
+++ b/usr/src/contrib/ast/src/cmd/ksh93/sh/lex.c
@@ -1462,36 +1462,35 @@ breakloop:
 		default:
 			if(lp->lex.testop2)
 			{
-#ifdef __ASTUpstream__
-				if(lp->lexd.warn && (c&TEST_ARITH))
-					errormsg(SH_DICT,ERROR_warn(0),e_lexobsolete4,shp->inlineno,state);
-#else
 				if(lp->lexd.warn && (c&TEST_ARITH)) {
-					char *alt = NULL;
+					char *alt;
 
-					if (strcmp(state, "-eq") == 0)
+					switch (c) {
+					case TEST_EQ:
 						alt = "==";
-					else if (strcmp(state, "-ne") == 0)
+						break;
+					case TEST_NE:
 						alt = "!=";
-					else if (strcmp(state, "-lt") == 0)
+						break;
+					case TEST_LT:
 						alt = "<";
-					else if (strcmp(state, "-gt") == 0)
+						break;
+					case TEST_GT:
 						alt = ">";
-					else if (strcmp(state, "-le") == 0)
+						break;
+					case TEST_LE:
 						alt = "<=";
-					else if (strcmp(state, "-ge") == 0)
+						break;
+					case TEST_GE:
 						alt = ">=";
-					if (alt != NULL) {
-						errormsg(SH_DICT, ERROR_warn(0),
-						    e_lexobsolete4b,
-						    shp->inlineno, state, alt);
-					} else {
-						errormsg(SH_DICT, ERROR_warn(0),
-						    e_lexobsolete4,
-						    shp->inlineno, state);
+						break;
+					default:
+						alt = "??";
 					}
+					errormsg(SH_DICT, ERROR_warn(0),
+					    e_lexobsolete4,
+					    shp->inlineno, state, alt);
 				}
-#endif
 				if(c&TEST_PATTERN)
 					lp->lex.incase = 1;
 				else if(c==TEST_REP)
diff --git a/usr/src/contrib/ast/src/cmd/ksh93/sh/parse.c b/usr/src/contrib/ast/src/cmd/ksh93/sh/parse.c
index d9100840f0..b6e09ccc2f 100644
--- a/usr/src/contrib/ast/src/cmd/ksh93/sh/parse.c
+++ b/usr/src/contrib/ast/src/cmd/ksh93/sh/parse.c
@@ -251,7 +251,7 @@ static Shnode_t	*makeparent(Lex_t *lp, int flag, Shnode_t *child)
 	return(par);
 }
 
-static int paramsub(const char *str)
+static const char *paramsub(const char *str)
 {
 	register int c,sub=0,lit=0;
 	while(c= *str++)
@@ -259,16 +259,16 @@ static int paramsub(const char *str)
 		if(c=='$' && !lit)
 		{
 			if(*str=='(')
-				return(0);
+				return(NULL);
 			if(sub)
 				continue;
 			if(*str=='{')
 				str++;
 			if(!isdigit(*str) && strchr("?#@*!$ ",*str)==0)
-				return(1);
+				return(str);
 		}
 		else if(c=='`')
-			return(0);
+			return(NULL);
 		else if(c=='[' && !lit)
 			sub++;
 		else if(c==']' && !lit)
@@ -276,7 +276,7 @@ static int paramsub(const char *str)
 		else if(c=='\'')
 			lit = !lit;
 	}
-	return(0);
+	return(NULL);
 }
 
 static Shnode_t *getanode(Lex_t *lp, struct argnod *ap)
@@ -289,8 +289,15 @@ static Shnode_t *getanode(Lex_t *lp, struct argnod *ap)
 		t->ar.arcomp = sh_arithcomp(lp->sh,ap->argval);
 	else
 	{
-		if(sh_isoption(SH_NOEXEC) && (ap->argflag&ARG_MAC) && paramsub(ap->argval))
-			errormsg(SH_DICT,ERROR_warn(0),e_lexwarnvar,lp->sh->inlineno, ap->argval);
+		const char *p, *q;
+
+		if (sh_isoption(SH_NOEXEC) && (ap->argflag&ARG_MAC) &&
+		    (p = paramsub(ap->argval)) != NULL) {
+			for (q = p; !isspace(*q) && *q != '\0'; q++)
+				;
+			errormsg(SH_DICT, ERROR_warn(0), e_lexwarnvar,
+			    lp->sh->inlineno, ap->argval, q - p, p);
+		}
 		t->ar.arcomp = 0;
 	}
 	return(t);