diff --git a/sbin/devd/devd.cc b/sbin/devd/devd.cc
--- a/sbin/devd/devd.cc
+++ b/sbin/devd/devd.cc
@@ -70,6 +70,7 @@
 #include <sys/types.h>
 #include <sys/wait.h>
 #include <sys/un.h>
+#include <sys/time.h>
 
 #include <cctype>
 #include <cerrno>
@@ -88,6 +89,7 @@
 #include <regex.h>
 #include <syslog.h>
 #include <unistd.h>
+#include <stdint.h>
 
 #include <algorithm>
 #include <map>
@@ -95,6 +97,7 @@
 #include <list>
 #include <stdexcept>
 #include <vector>
+#include <exception>
 
 #include "devd.h"		/* C compatible definitions */
 #include "devd.hh"		/* C++ class definitions */
@@ -846,71 +849,87 @@
 static void
 process_event(char *buffer)
 {
+	// TODO
+	// 1. Create "newerthan" syntax element for devd.conf
+	// 2. Make custom exception for redundant events
+
 	char type;
 	char *sp;
 	struct timeval tv;
 	char *timestr;
+	struct stat file_info;
+	
+	gettimeofday(&tv, NULL);
 
 	sp = buffer + 1;
-	devdlog(LOG_INFO, "Processing event '%s'\n", buffer);
 	type = *buffer++;
-	cfg.push_var_table();
-	// $* is the entire line
-	cfg.set_variable("*", buffer - 1);
-	// $_ is the entire line without the initial character
-	cfg.set_variable("_", buffer);
-
-	// Save the time this happened (as approximated by when we got
-	// around to processing it).
-	gettimeofday(&tv, NULL);
-	asprintf(&timestr, "%jd.%06ld", (uintmax_t)tv.tv_sec, tv.tv_usec);
-	cfg.set_variable("timestamp", timestr);
-	free(timestr);
 
-	// Match doesn't have a device, and the format is a little
-	// different, so handle it separately.
-	switch (type) {
-	case notify:
-		//! (k=v)*
-		sp = cfg.set_vars(sp);
-		break;
-	case nomatch:
-		//? at location pnp-info on bus
-		sp = strchr(sp, ' ');
-		if (sp == NULL)
-			return;	/* Can't happen? */
-		*sp++ = '\0';
-		while (isspace(*sp))
-			sp++;
-		if (strncmp(sp, "at ", 3) == 0)
-			sp += 3;
-		sp = cfg.set_vars(sp);
-		while (isspace(*sp))
-			sp++;
-		if (strncmp(sp, "on ", 3) == 0)
-			cfg.set_variable("bus", sp + 3);
-		break;
-	case attach:	/*FALLTHROUGH*/
-	case detach:
-		sp = strchr(sp, ' ');
-		if (sp == NULL)
-			return;	/* Can't happen? */
-		*sp++ = '\0';
-		cfg.set_variable("device-name", buffer);
-		while (isspace(*sp))
-			sp++;
-		if (strncmp(sp, "at ", 3) == 0)
-			sp += 3;
-		sp = cfg.set_vars(sp);
-		while (isspace(*sp))
-			sp++;
-		if (strncmp(sp, "on ", 3) == 0)
-			cfg.set_variable("bus", sp + 3);
-		break;
+	const char* devmatch_ran = "/var/run/devmatch_ran";
+	stat(devmatch_ran, &file_info); // Retrieves last modification timestamp of file
+
+	if ((tv.tv_sec < file_info.st_mtim.tv_sec || tv.tv_usec < file_info.st_mtim.tv_nsec / 1000) && type==nomatch) { // Checks if event is older than devmatch_ran
+		throw std::exception();
 	}
+	else {
+		devdlog(LOG_INFO, "Processing event '%s'\n", buffer);
+		
+		cfg.push_var_table();
+		// $* is the entire line
+		cfg.set_variable("*", buffer - 1);
+		// $_ is the entire line without the initial character
+		cfg.set_variable("_", buffer);
+
+		// Save the time this happened (as approximated by when we got
+		// around to processing it).
+		asprintf(&timestr, "%jd.%06ld", (uintmax_t)tv.tv_sec, tv.tv_usec);
+		cfg.set_variable("timestamp", timestr);
+		free(timestr);
+
+		// Match doesn't have a device, and the format is a little
+		// different, so handle it separately.
+		switch (type) {
+		case notify:
+			//! (k=v)*
+			sp = cfg.set_vars(sp);
+			break;
+		case nomatch:
+			//? at location pnp-info on bus
+			sp = strchr(sp, ' ');
+			if (sp == NULL)
+				return;	/* Can't happen? */
+			*sp++ = '\0';
+			while (isspace(*sp))
+				sp++;
+			if (strncmp(sp, "at ", 3) == 0)
+				sp += 3;
+			sp = cfg.set_vars(sp);
+			while (isspace(*sp))
+				sp++;
+			if (strncmp(sp, "on ", 3) == 0)
+				cfg.set_variable("bus", sp + 3);
+			break;
+		case attach:	/*FALLTHROUGH*/
+		case detach:
+			sp = strchr(sp, ' ');
+			if (sp == NULL)
+				return;	/* Can't happen? */
+			*sp++ = '\0';
+			cfg.set_variable("device-name", buffer);
+			while (isspace(*sp))
+				sp++;
+			if (strncmp(sp, "at ", 3) == 0)
+				sp += 3;
+			sp = cfg.set_vars(sp);
+			while (isspace(*sp))
+				sp++;
+			if (strncmp(sp, "on ", 3) == 0)
+				cfg.set_variable("bus", sp + 3);
+			break;
+		}
 
-	cfg.find_and_execute(type);
-	cfg.pop_var_table();
+		cfg.find_and_execute(type);
+		cfg.pop_var_table();
+	}
 }
 
 static int
@@ -1032,6 +1051,7 @@
 static void
 event_loop(void)
 {
+
 	int rv;
 	int fd;
 	char buffer[DEVCTL_MAXBUF];
@@ -1121,12 +1141,18 @@
 				while (buffer[--rv] == '\n')
 					buffer[rv] = '\0';
 				try {
+
 					process_event(buffer);
 				}
+				// Include a second catch statement for late timestamps, so make process_event throw an exception
 				catch (const std::length_error& e) {
 					devdlog(LOG_ERR, "Dropping event %s "
 					    "due to low memory", buffer);
 				}
+				catch (const std::exception& e) {
+					devdlog(LOG_ERR, "Event %s is redundant", buffer);
+
+				}
 			} else if (rv < 0) {
 				if (errno != EINTR)
 					break;