[Midnightbsd-cvs] src [8892] trunk: add support for a exclamation char in regex in devd.

[laffer1 at midnightbsd.org]

Revision: 8892
          http://svnweb.midnightbsd.org/src/?rev=8892
Author:   laffer1
Date:     2016-09-26 18:31:47 -0400 (Mon, 26 Sep 2016)
Log Message:
-----------
add support for a exclamation char in regex in devd.

Modified Paths:
--------------
    trunk/etc/devd.conf
    trunk/sbin/devd/devd.cc
    trunk/sbin/devd/devd.conf.5
    trunk/sbin/devd/devd.hh

Modified: trunk/etc/devd.conf
===================================================================
--- trunk/etc/devd.conf	2016-09-26 22:30:05 UTC (rev 8891)
+++ trunk/etc/devd.conf	2016-09-26 22:31:47 UTC (rev 8892)
@@ -38,6 +38,7 @@
 #
 notify 0 {
 	match "system"		"IFNET";
+	match "subsystem"	"!usbus[0-9]+";
 	match "type"		"ATTACH";
 	action "/etc/pccard_ether $subsystem start";
 };

Modified: trunk/sbin/devd/devd.cc
===================================================================
--- trunk/sbin/devd/devd.cc	2016-09-26 22:30:05 UTC (rev 8891)
+++ trunk/sbin/devd/devd.cc	2016-09-26 22:31:47 UTC (rev 8892)
@@ -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 @@
 	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;
 }
 

Modified: trunk/sbin/devd/devd.conf.5
===================================================================
--- trunk/sbin/devd/devd.conf.5	2016-09-26 22:30:05 UTC (rev 8891)
+++ trunk/sbin/devd/devd.conf.5	2016-09-26 22:31:47 UTC (rev 8892)
@@ -41,7 +41,7 @@
 .\" ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
 .\" SOFTWARE.
 .\"
-.Dd March 8, 2009
+.Dd March 4, 2013
 .Dt DEVD.CONF 5
 .Os
 .Sh NAME
@@ -121,6 +121,10 @@
 .Ar regexp-name .
 The variable is available throughout the rest of
 the configuration file.
+If the string begins with
+.Ql \&! ,
+it matches if the regular expression formed by the rest of the string
+does not match.
 All regular expressions have an implicit
 .Ql ^$
 around them.

Modified: trunk/sbin/devd/devd.hh
===================================================================
--- trunk/sbin/devd/devd.hh	2016-09-26 22:30:05 UTC (rev 8891)
+++ trunk/sbin/devd/devd.hh	2016-09-26 22:31:47 UTC (rev 8892)
@@ -92,6 +92,7 @@
 private:
 	std::string _var;
 	std::string _re;
+	bool _inv;
 	regex_t _regex;
 };