- use EVIOCGBIT ioctl instead of trying to parse key field from

  /proc/bus/input/devices to avoid issues on 64bit kernel with 32bit userspace

1 files changed, 34 insertions, 0 deletions

diff --git a/perl-install/c/stuff.xs.pl b/perl-install/c/stuff.xs.pl
index cd2c6bf03..b2c4c2512 100755
--- a/perl-install/c/stuff.xs.pl
+++ b/perl-install/c/stuff.xs.pl
@@ -36,6 +36,7 @@ print '
 #include <net/route.h>
 #include <netinet/in.h>
 #include <linux/sockios.h>
+#include <linux/input.h>
 
 // for ethtool structs:
 typedef unsigned long long u64;
@@ -485,7 +486,40 @@ strftime(fmt, sec, min, hour, mday, mon, year, wday = -1, yday = -1, isdst = -1)
         }
     }
 
+#define BITS_PER_LONG (sizeof(long) * 8)
+#define NBITS(x) ((((x)-1)/BITS_PER_LONG)+1)
+#define OFF(x)  ((x)%BITS_PER_LONG)
+#define BIT(x)  (1UL<<OFF(x))
+#define LONG(x) ((x)/BITS_PER_LONG)
+#define test_bit(bit, array)    ((array[LONG(bit)] >> OFF(bit)) & 1)
 
+void
+EVIocGBitKey (char *file)
+	PPCODE:
+		int fd;
+		int i;
+		long bitmask[NBITS(KEY_MAX)];
+
+		fd = open (file, O_RDONLY);
+		if (fd < 0) {
+			perror("Cannot open /dev/input/eventX");
+			return;
+		}
+
+		if (ioctl (fd, EVIOCGBIT(EV_KEY, sizeof (bitmask)), bitmask) < 0) {
+			perror ("ioctl EVIOCGBIT failed");
+			close (fd);
+			return;
+		}
+
+        	for (i = NBITS(KEY_MAX) - 1; i > 0; i--)
+			if (bitmask[i])
+				break;
+
+		for (; i >= 0; i--) {
+			EXTEND(sp, 1);
+			PUSHs(sv_2mortal(newSViv(bitmask[i])));
+		}
 
 char *
 kernel_version()