• syn.c: replace expanded use of str_save() with the actual macro

• others: fix 6 (!) cases of non-constant or side-effect arguments
  to the str_save() or str_nsave() macros, and other abuse of them
• also fix some cosmetics and other un-nice code while here

eval.c

@@ -2,7 +2,7 @@
 
 #include "sh.h"
 
-__RCSID("$MirOS: src/bin/mksh/eval.c,v 1.46 2008/05/17 18:46:58 tg Exp $");
+__RCSID("$MirOS: src/bin/mksh/eval.c,v 1.47 2008/07/12 16:56:38 tg Exp $");
 
 #ifdef MKSH_SMALL
 #define MKSH_NOPWNAM
@@ -425,7 +425,8 @@ expand(const char *cp,	/* input word */
 							goto no_repl;
 
 						/* prepare string on which to work */
-						sbeg = s = str_save(str_val(st->var), ATEMP);
+						tpat0 = str_val(st->var);
+						sbeg = s = str_save(tpat0, ATEMP);
 
 						/* first see if we have any match at all */
 						tpat0 = pat;
@@ -769,10 +770,7 @@ expand(const char *cp,	/* input word */
 				    Xlength(ds, dp) == 0) {
 					char *p;
 
-					if ((p = str_nsave(null, 0, ATEMP))
+					*(p = alloc(1, ATEMP)) = '\0';
-					    == NULL)
-						internal_errorf("unable "
-						    "to allocate memory");
 					XPput(*wp, p);
 				}
 				type = XSUBMID;

expr.c

@@ -2,7 +2,7 @@
 
 #include "sh.h"
 
-__RCSID("$MirOS: src/bin/mksh/expr.c,v 1.17 2008/04/20 00:24:25 tg Exp $");
+__RCSID("$MirOS: src/bin/mksh/expr.c,v 1.18 2008/07/12 16:56:38 tg Exp $");
 
 /* The order of these enums is constrained by the order of opinfo[] */
 enum token {
@@ -480,9 +480,12 @@ exprtoken(Expr_state *es)
 		tvar = str_nsave(es->tokp, cp - es->tokp, ATEMP);
 		goto process_tvar;
 	} else if (ksh_isdigit(c)) {
+		int i;
+
 		while (c != '_' && (ksh_isalnux(c) || c == '#'))
 			c = *cp++;
-		tvar = str_nsave(es->tokp, --cp - es->tokp, ATEMP);
+		i = --cp - es->tokp;
+		tvar = str_nsave(es->tokp, i, ATEMP);
  process_tvar:
 		es->val = tempvar();
 		es->val->flag &= ~INTEGER;

funcs.c

@@ -5,7 +5,7 @@
 
 #include "sh.h"
 
-__RCSID("$MirOS: src/bin/mksh/funcs.c,v 1.83 2008/06/08 17:16:25 tg Exp $");
+__RCSID("$MirOS: src/bin/mksh/funcs.c,v 1.84 2008/07/12 16:56:39 tg Exp $");
 
 /* A leading = means assignments before command are kept;
  * a leading * means a POSIX special builtin;
@@ -1074,8 +1074,10 @@ c_alias(const char **wp)
 		struct tbl *ap;
 		int h;
 
-		if ((val = cstrchr(alias, '=')))
+		if ((val = cstrchr(alias, '='))) {
-			alias = xalias = str_nsave(alias, val++ - alias, ATEMP);
+			h = val++ - alias;
+			alias = xalias = str_nsave(alias, h, ATEMP);
+		}
 		h = hash(alias);
 		if (val == NULL && !tflag && !xflag) {
 			ap = ktsearch(t, alias, h);
@@ -1103,8 +1105,7 @@ c_alias(const char **wp)
 				afree((void*)ap->val.s, APERM);
 			}
 			/* ignore values for -t (at&t ksh does this) */
-			newval = tflag ? search(alias, path, X_OK, NULL) :
+			newval = tflag ? search(alias, path, X_OK, NULL) : val;
-			    val;
 			if (newval) {
 				ap->val.s = str_save(newval, APERM);
 				ap->flag |= ALLOC|ISSET;

histrap.c

@@ -3,7 +3,7 @@
 
 #include "sh.h"
 
-__RCSID("$MirOS: src/bin/mksh/histrap.c,v 1.65 2008/07/06 22:41:08 tg Exp $");
+__RCSID("$MirOS: src/bin/mksh/histrap.c,v 1.66 2008/07/12 16:56:39 tg Exp $");
 
 /*-
  * MirOS: This is the default mapping type, and need not be specified.
@@ -21,7 +21,7 @@ static int hist_count_lines(unsigned char *, int);
 static int hist_shrink(unsigned char *, int);
 static unsigned char *hist_skip_back(unsigned char *,int *,int);
 static void histload(Source *, unsigned char *, int);
-static void histinsert(Source *, int, unsigned char *);
+static void histinsert(Source *, int, const char *);
 static void writehistfile(int, char *);
 static int sprinkle(int);
 #endif
@@ -68,7 +68,8 @@ c_fc(const char **wp)
 				sflag++;
 			else {
 				size_t len = strlen(p);
-				editor = str_nsave(p, len + 4, ATEMP);
+				editor = alloc(len + 4, ATEMP);
+				memcpy(editor, p, len);
 				memcpy(editor + len, " $_", 4);
 			}
 			break;
@@ -639,8 +640,7 @@ hist_init(Source *s)
 	hist_source = s;
 
 #if HAVE_PERSISTENT_HISTORY
-	hname = str_val(global("HISTFILE"));
+	if ((hname = str_val(global("HISTFILE"))) == NULL)
-	if (hname == NULL)
 		return;
 	hname = str_save(hname, APERM);
 
@@ -855,7 +855,7 @@ histload(Source *s, unsigned char *base, int bytes)
 				/* worry about line numbers */
 				if (histptr >= history && lno-1 != s->line) {
 					/* a replacement ? */
-					histinsert(s, lno, line);
+					histinsert(s, lno, (char *)line);
 				} else {
 					s->line = lno;
 					histsave(lno, (char *)line, 0);
@@ -870,7 +870,7 @@ histload(Source *s, unsigned char *base, int bytes)
  *	Insert a line into the history at a specified number
  */
 static void
-histinsert(Source *s, int lno, unsigned char *line)
+histinsert(Source *s, int lno, const char *line)
 {
 	char **hp;
 
@@ -878,7 +878,7 @@ histinsert(Source *s, int lno, unsigned char *line)
 		hp = &histptr[lno - s->line];
 		if (*hp)
 			afree((void*)*hp, APERM);
-		*hp = str_save((char *)line, APERM);
+		*hp = str_save(line, APERM);
 	}
 }
 
@@ -1005,9 +1005,8 @@ inittraps(void)
 			else {
 				char *s;
 
-				sigtraps[i].name = s = str_save(
+				s = !strncasecmp(cs, "SIG", 3) ? cs + 3 : cs;
-				    !strncasecmp(cs, "SIG", 3) ? cs + 3 : cs,
+				sigtraps[i].name = s = str_save(s, APERM);
-				    APERM);
 				while ((*s = ksh_toupper(*s)))
 					++s;
 			}

lex.c

@@ -2,7 +2,7 @@
 
 #include "sh.h"
 
-__RCSID("$MirOS: src/bin/mksh/lex.c,v 1.65 2008/07/09 21:32:43 tg Exp $");
+__RCSID("$MirOS: src/bin/mksh/lex.c,v 1.66 2008/07/12 16:56:39 tg Exp $");
 
 /*
  * states while lexing word
@@ -1290,9 +1290,10 @@ set_prompt(int to, Source *s)
 				 * unwinding its stack through this code as it
 				 * exits.
 				 */
-			} else
+			} else {
-				prompt = str_save(substitute(ps1, 0),
+				char *cp = substitute(ps1, 0);
-				    saved_atemp);
+				prompt = str_save(cp, saved_atemp);
+			}
 			quitenv(NULL);
 		}
 		break;

syn.c

@@ -2,7 +2,7 @@
 
 #include "sh.h"
 
-__RCSID("$MirOS: src/bin/mksh/syn.c,v 1.22 2008/06/28 22:51:56 tg Exp $");
+__RCSID("$MirOS: src/bin/mksh/syn.c,v 1.23 2008/07/12 16:56:40 tg Exp $");
 
 struct nesting_state {
 	int start_token;	/* token than began nesting (eg, FOR) */
@@ -366,7 +366,7 @@ get_command(int cf)
 		if (!is_wdvarname(yylval.cp, true))
 			yyerror("%s: bad identifier\n",
 			    c == FOR ? "for" : "select");
-		t->str = str_nsave(ident, strlen(ident), ATEMP);
+		t->str = str_save(ident, ATEMP);
 		nesting_push(&old_nesting, c);
 		t->vars = wordlist();
 		t->left = dogroup();

var.c

@@ -2,7 +2,7 @@
 
 #include "sh.h"
 
-__RCSID("$MirOS: src/bin/mksh/var.c,v 1.56 2008/05/17 18:47:03 tg Exp $");
+__RCSID("$MirOS: src/bin/mksh/var.c,v 1.57 2008/07/12 16:56:40 tg Exp $");
 
 /*
  * Variables
@@ -642,9 +642,10 @@ typeset(const char *var, Tflag set, Tflag clr, int field, int base)
 		}
 		val += len;
 	}
-	if (*val == '=')
+	if (*val == '=') {
-		tvar = str_nsave(var, val++ - var, ATEMP);
+		int i = val++ - var;
-	else {
+		tvar = str_nsave(var, i, ATEMP);
+	} else {
 		/* Importing from original environment: must have an = */
 		if (set & IMPORT)
 			return NULL;