X-Git-Url: https://iankelling.org/git/?a=blobdiff_plain;f=evhz.c;h=e3cc90cda2f6194e2c84c5813b4796481a76751b;hb=e9de032f6a02eb6443c57e6260ef50411542c52d;hp=a7a42be54b81329e07cbdf353b172cb10871c02c;hpb=20ff822c86fea9641def4305b49b171d4fe2dd0b;p=evhz

diff --git a/evhz.c b/evhz.c
index a7a42be..e3cc90c 100644
--- a/evhz.c
+++ b/evhz.c
@@ -1,112 +1,150 @@
+/* Copyright (C) 2016 Ian Kelling */
+
+/* Licensed under the Apache License, Version 2.0 (the "License"); */
+/* you may not use this file except in compliance with the License. */
+/* You may obtain a copy of the License at */
+
+/*     http://www.apache.org/licenses/LICENSE-2.0 */
+
+/* Unless required by applicable law or agreed to in writing, software */
+/* distributed under the License is distributed on an "AS IS" BASIS, */
+/* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. */
+/* See the License for the specific language governing permissions and */
+/* limitations under the License. */
+#include <string.h>
 #include <stdio.h>
 #include <linux/input.h>
 #include <fcntl.h>
 #include <signal.h>
+#include <getopt.h>
+#include <unistd.h>
 
-#define EVENTS 10
+#define EVENTS 50
 #define HZ_LIST 64
 
 typedef struct event_s {
-	int fd;
-	int hz[HZ_LIST];
-	int count;
-	double prvtime;
+    int fd;
+    int hz[HZ_LIST];
+    int count;
+    int avghz;
+    double prvtime;
+    char name[128];
 } event_t;
 
 int quit = 0;
 
 void sigint() {
-	signal(SIGINT, sigint);
-	quit = 1;
+    quit = 1;
 }
 
-int main(int argc, char **argv) {
-	int i;
-	event_t events[EVENTS];
-
-	signal(SIGINT, sigint);
-
-	printf("Press CTRL-C to exit.\n\n");
-
-	memset(events, 0, sizeof(events));
-
-	for(i = 0; i < EVENTS; i++) {
-		char device[18];
-
-		sprintf(device, "/dev/input/event%i", i);
-		events[i].fd = open(device, O_RDONLY);
+int main(int argc, char *argv[]) {
+    int optch;
+    int i;
+    event_t events[EVENTS];
+    int verbose = 1;
+
+    while((optch = getopt(argc, argv, "hn")) != -1) {
+        switch(optch) {
+        case('h'):
+            printf("Usage: %s [-n|-h]\n", argv[0]);
+            printf("-n     nonverbose\n");
+            printf("-h     help\n");
+            return 0;
+            break;
+        case('n'):
+            verbose = 0;
+            break;
+        }
+    }
+
+    if(geteuid() != 0) {
+        printf("%s must be used as superuser\n", argv[0]);
+        return 1;
+    }
+
+    signal(SIGINT, sigint);
+
+    printf("Press CTRL-C to exit.\n\n");
+
+    memset(events, 0, sizeof(events));
+
+    // List input devices
+    for(i = 0; i < EVENTS; i++) {
+        char device[19];
+
+        sprintf(device, "/dev/input/event%i", i);
+        events[i].fd = open(device, O_RDONLY);
 		
-		if(events[i].fd != -1) {
-			char name[128];
-			ioctl(events[i].fd, EVIOCGNAME(sizeof(name)), name);
-			printf("event%i: %s\n", i, name);
-		}
-	}
+        if(events[i].fd != -1) {
+            ioctl(events[i].fd, EVIOCGNAME(sizeof(events[i].name)), events[i].name);
+            if(verbose) printf("event%i: %s\n", i, events[i].name);
+        }
+    }
 
-	while(!quit) {
-		fd_set set;
+    while(!quit) {
+        fd_set set;
 
-		FD_ZERO(&set);
+        FD_ZERO(&set);
 
-		for(i = 0; i < EVENTS; i++) {
-			if(events[i].fd != -1) {
-				FD_SET(events[i].fd, &set);
-			}
-		}
+        for(i = 0; i < EVENTS; i++) {
+            if(events[i].fd != -1) {
+                FD_SET(events[i].fd, &set);
+            }
+        }
 
-		if(select(FD_SETSIZE, &set, NULL, NULL, NULL) > 0) {
-			int bytes;
-			struct input_event event;
+        if(select(FD_SETSIZE, &set, NULL, NULL, NULL) > 0) {
+            int bytes;
+            struct input_event event;
 
-			for(i = 0; i < EVENTS; i++) {
-				if(events[i].fd == -1) {
-					continue;
-				}
+            for(i = 0; i < EVENTS; i++) {
+                if(events[i].fd == -1 || !FD_ISSET(events[i].fd, &set)) {
+                    continue;
+                }
 
-				if(!FD_ISSET(events[i].fd, &set)) {
-					continue;
-				}
+                bytes = read(events[i].fd, &event, sizeof(event));
 
-				bytes = read(events[i].fd, &event, sizeof(event));
+                if(bytes != sizeof(event)) {
+                    continue;
+                }
 
-				if(bytes != sizeof(event)) {
-					continue;
-				}
+                if(event.type == EV_REL || event.type == EV_ABS) {
+                    double time;
+                    int hz;
 
-				if(event.type == EV_REL) {
-					double time;
-					int hz;
+                    time = event.time.tv_sec * 1000 + event.time.tv_usec / 1000;
+                    hz = 1000 / (time - events[i].prvtime);
 
-					time = event.time.tv_sec * 1000 + event.time.tv_usec / 1000;
-					hz = 1000 / (time - events[i].prvtime);
+                    if(hz > 0) {
+                        int j;
 
-					if(hz > 0) {
-						int avghz;
-						int j;
+                        events[i].count++;
+                        events[i].hz[events[i].count & (HZ_LIST - 1)] = hz;
 
-						events[i].count++;
-						events[i].hz[events[i].count & (HZ_LIST - 1)] = hz;
+                        events[i].avghz = 0;
 
-						avghz = 0;
+                        for(j = 0; j < HZ_LIST; j++) {
+                            events[i].avghz += events[i].hz[j];
+                        }
 
-						for(j = 0; j < HZ_LIST; j++) {
-							avghz += events[i].hz[j];
-						}
+                        events[i].avghz /= (events[i].count > HZ_LIST) ? HZ_LIST : events[i].count;
 
-						avghz /= (events[i].count > HZ_LIST) ? HZ_LIST : events[i].count;
+                        if(verbose) printf("%s: Latest % 5iHz, Average % 5iHz\n", events[i].name, hz, events[i].avghz);
+                    }
 
-						printf("event%i: latest hz = %i (average hz = %i)\n", i, hz, avghz);
-					}
+                    events[i].prvtime = time;
+                }
+            }
+        }
+    }
 
-					events[i].prvtime = time;
-				}
-			}
-		}
-	}
+    for(i = 0; i < EVENTS; i++) {
+        if(events[i].fd != -1) {
+            if (events[i].avghz != 0) {
+                printf("\nAverage for %s: % 5iHz\n", events[i].name, events[i].avghz);
+            }
+            close(events[i].fd);
+        }
+    }
 
-	for(i = 0; i < EVENTS; i++) {
-		if(events[i].fd != -1) {
-			close(events[i].fd);
-		}
-	}
+    return 0;
 }