Add a cli_quote() function for quoting a string properly when reporting

it in the CLI.

Use it for cc_command and listen_address parameters



git-svn-id: http://www.varnish-cache.org/svn/trunk/varnish-cache@2982 d4fa192b-c00b-0410-8231-f00ffab90ce4

bin/varnishd/mgt_param.c

@@ -315,11 +315,7 @@ tweak_listen_address(struct cli *cli, const struct parspec *par, const char *arg
 
 	(void)par;
 	if (arg == NULL) {
-		/* Quote the string if we have more than one socket */
-		if (heritage.nsocks > 1)
-			cli_out(cli, "\"%s\"", master.listen_address);
-		else
-			cli_out(cli, "%s", master.listen_address);
+		cli_quote(cli, master.listen_address);
 		return;
 	}
 
@@ -348,7 +344,8 @@ tweak_listen_address(struct cli *cli, const struct parspec *par, const char *arg
 		int j, n;
 
 		if (VSS_parse(av[i], &host, &port) != 0) {
-			cli_out(cli, "Invalid listen address \"%s\"", av[i]);
+			cli_out(cli, "Invalid listen address ");
+			cli_quote(cli, av[i]);
 			cli_result(cli, CLIS_PARAM);
 			break;
 		}
@@ -356,7 +353,8 @@ tweak_listen_address(struct cli *cli, const struct parspec *par, const char *arg
 		free(host);
 		free(port);
 		if (n == 0) {
-			cli_out(cli, "Invalid listen address \"%s\"", av[i]);
+			cli_out(cli, "Invalid listen address ");
+			cli_quote(cli, av[i]);
 			cli_result(cli, CLIS_PARAM);
 			break;
 		}
@@ -399,7 +397,7 @@ tweak_cc_command(struct cli *cli, const struct parspec *par, const char *arg)
 	/* XXX should have tweak_generic_string */
 	(void)par;
 	if (arg == NULL) {
-		cli_out(cli, "%s", mgt_cc_cmd);
+		cli_quote(cli, mgt_cc_cmd);
 	} else {
 		free(mgt_cc_cmd);
 		mgt_cc_cmd = strdup(arg);

include/cli_priv.h

@@ -54,6 +54,7 @@ struct cli_proto {
 
 /* The implementation must provide these functions */
 void cli_out(struct cli *cli, const char *fmt, ...);
+void cli_quote(struct cli *cli, const char *str);
 void cli_param(struct cli *cli);
 void cli_result(struct cli *cli, unsigned r);
 

lib/libvarnish/cli_common.c

@@ -68,6 +68,53 @@ cli_out(struct cli *cli, const char *fmt, ...)
 	va_end(ap);
 }
 
+void
+cli_quote(struct cli *cli, const char *s)
+{
+	const char *q;
+	int quote = 0;
+
+	for (q = s; *q != '\0'; q++) {
+		if (!isgraph(*q) || *q == '"') {
+			quote++;
+			break;
+		}
+	}
+	if (!quote) {
+		(void)vsb_cat(cli->sb, s);
+		return;
+	}
+	(void)vsb_putc(cli->sb, '"');
+	for (q = s; *q != '\0'; q++) {
+		switch (*q) {
+		case ' ':
+			(void)vsb_putc(cli->sb, *q);
+			break;
+		case '\\':
+		case '"':
+			(void)vsb_putc(cli->sb, '\\');
+			(void)vsb_putc(cli->sb, *q);
+			break;
+		case '\n':
+			(void)vsb_cat(cli->sb, "\\n");
+			break;
+		case '\r':
+			(void)vsb_cat(cli->sb, "\\r");
+			break;
+		case '\t':
+			(void)vsb_cat(cli->sb, "\\t");
+			break;
+		default:
+			if (isgraph(*q))
+				(void)vsb_putc(cli->sb, *q);
+			else
+				(void)vsb_printf(cli->sb, "\\%o", *q);
+			break;
+		}
+	}
+	(void)vsb_putc(cli->sb, '"');
+}
+
 void
 cli_result(struct cli *cli, unsigned res)
 {
@@ -78,7 +125,6 @@ cli_result(struct cli *cli, unsigned res)
 		printf("CLI result = %d\n", res);
 }
 
-
 void
 cli_param(struct cli *cli)
 {