ash: disable check for "good" function name, bash does not check this

function                                             old     new   delta
.rodata                                           105304  105261     -43
parse_command                                       1696    1633     -63
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-106)           Total: -106 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

shell/ash.c

@@ -12123,18 +12123,19 @@ simplecmd(void)
 			if (args && app == &args->narg.next
 			 && !vars && !redir
 			) {
-				struct builtincmd *bcmd;
-				const char *name;
+//				struct builtincmd *bcmd;
+//				const char *name;
 
 				/* We have a function */
 				if (IF_BASH_FUNCTION(!function_flag &&) readtoken() != TRP)
 					raise_error_unexpected_syntax(TRP);
-				name = n->narg.text;
-				if (!goodname(name)
-				 || ((bcmd = find_builtin(name)) && IS_BUILTIN_SPECIAL(bcmd))
-				) {
-					raise_error_syntax("bad function name");
-				}
+//bash allows functions named "123", "..", "return"!
+//				name = n->narg.text;
+//				if (!goodname(name)
+//				 || ((bcmd = find_builtin(name)) && IS_BUILTIN_SPECIAL(bcmd))
+//				) {
+//					raise_error_syntax("bad function name");
+//				}
 				n->type = NDEFUN;
 				checkkwd = CHKNL | CHKKWD | CHKALIAS;
 				n->ndefun.text = n->narg.text;

shell/hush.c

@@ -4306,7 +4306,7 @@ static int done_word(struct parse_context *ctx)
 		 || endofname(command->argv[0])[0] != '\0'
 		) {
 			/* bash says just "not a valid identifier" */
-			syntax_error("bad variable name in for");
+			syntax_error("bad for loop variable");
 			return 1;
 		}
 		/* Force FOR to have just one word (variable name) */
@@ -4683,6 +4683,11 @@ static int parse_group(struct parse_context *ctx,
 			syntax_error_unexpected_ch(ch);
 			return -1;
 		}
+//bash allows functions named "123", "..", "return"!
+//		if (endofname(command->argv[0])[0] != '\0') {
+//			syntax_error("bad function name");
+//			return -1;
+//		}
 		nommu_addchr(&ctx->as_string, ch);
 		command->cmd_type = CMD_FUNCDEF;
 		goto skip;

shell/hush_test/hush-vars/readonly0.right

@@ -1,5 +1,5 @@
-readonly a=A
-readonly b=B
+readonly a='A'
+readonly b='B'
 Ok:0
 
 hush: a=A: readonly variable