ignore gaps in the input device numbering

This bug can be reproduced on any architecture, plug in 2 usb mice, then
unplug the first one...  there's your gap in event device numbers.

http://bugs.debian.org/326149

1 files changed, 12 insertions, 6 deletions

diff --git a/lsinput.c b/lsinput.c
index 45f50e5..b500d03 100644
--- a/lsinput.c
+++ b/lsinput.c
@@ -1,5 +1,6 @@
 #include <stdio.h>
 #include <stdlib.h>
+#include <sys/stat.h>
 #include <unistd.h>
 #include <fcntl.h>
 
@@ -10,14 +11,19 @@
 static void list_devices(void)
 {
 	int i,fd;
+        char filename[32];
+        struct stat statbuf;
 
 	for (i = 0; i < 32; i++) {
-		/* try to open */
-		fd = device_open(i,1);
-		if (-1 == fd)
-			return;
-		device_info(fd);
-		close(fd);
+                snprintf(filename,sizeof(filename), "/dev/input/event%d",i);
+                if (stat(filename, &statbuf) == 0) {
+                        /* try to open */
+                        fd = device_open(i,1);
+                        if (-1 == fd)
+                                return;
+                        device_info(fd);
+                        close(fd);
+                }
 	}
 	return;
 }