- Add support for a "!" character in regex matching in devd(8). It inverts

  the logic (true/false) of the matching.

- Add "!usbus[0-9]+" to IFNET ATTACH notification handler in the default
  devd.conf to prevent rc.d/netif from running when usbus[0-9]+ is attached.

Reviewed by:	imp

1 files changed, 13 insertions, 3 deletions

diff --git a/sbin/devd/devd.cc b/sbin/devd/devd.cc
index 87d0580e26d4..fd3b6e396785 100644
--- a/sbin/devd/devd.cc
+++ b/sbin/devd/devd.cc
@@ -251,7 +251,14 @@ match::match(config &c, const char *var, const char *re)
 	: _var(var)
 {
 	_re = "^";
-	_re.append(c.expand_string(string(re)));
+	if (!c.expand_string(string(re)).empty() &&
+	    c.expand_string(string(re)).at(0) == '!') {
+		_re.append(c.expand_string(string(re)).substr(1));
+		_inv = 1;
+	} else {
+		_re.append(c.expand_string(string(re)));
+		_inv = 0;
+	}
 	_re.append("$");
 	regcomp(&_regex, _re.c_str(), REG_EXTENDED | REG_NOSUB | REG_ICASE);
 }
@@ -268,10 +275,13 @@ match::do_match(config &c)
 	bool retval;
 
 	if (Dflag)
-		fprintf(stderr, "Testing %s=%s against %s\n", _var.c_str(),
-		    value.c_str(), _re.c_str());
+		fprintf(stderr, "Testing %s=%s against %s, invert=%d\n",
+		    _var.c_str(), value.c_str(), _re.c_str(), _inv);
 
 	retval = (regexec(&_regex, value.c_str(), 0, NULL, 0) == 0);
+	if (_inv == 1)
+		retval = (retval == 0) ? 1 : 0;
+
 	return retval;
 }