log uppercase letters when capslock is on
This is tested and working. Only caveat is that it is a simple toggle that assumes CapsLock is off when logkeys starts. If CapsLock happens to be on when logkeys starts, log file will show reverse capitalization.

This is tested and working. Only caveat is that it is a simple toggle that assumes CapsLock is off when logkeys starts. If CapsLock happens to be on when logkeys starts, log file will show reverse capitalization.
Update logkeys.cc
kernc
Unified Split

Showing with 16 additions and 0 deletions.

+16 −0 src/logkeys.cc
diff --git a/src/logkeys.cc b/src/logkeys.cc
@@ -19,6 +19,7 @@
 #include <netdb.h>
 #include <unistd.h>
 #include <getopt.h>
+  
+#include <wctype.h>
 #include <sys/file.h>
 #include <sys/stat.h>
 #include <sys/socket.h>
@@ -47,6 +48,7 @@
 #define COMMAND_STR_DUMPKEYS ( EXE_DUMPKEYS " -n | " EXE_GREP " '^\\([[:space:]]shift[[:space:]]\\)*\\([[:space:]]altgr[[:space:]]\\)*keycode'" )
 #define COMMAND_STR_GET_PID  ( (std::string(EXE_PS " ax | " EXE_GREP " '") + program_invocation_name + "' | " EXE_GREP " -v grep").c_str() )
+  
+#define COMMAND_STR_CAPSLOCK_STATE ("{ { xset q 2>/dev/null | grep -q -E 'Caps Lock: +on'; } || { setleds 2>/dev/null | grep -q 'CapsLock on'; }; } && echo on")
 #define INPUT_EVENT_PATH  "/dev/input/"  // standard path
 #define DEFAULT_LOG_FILE  "/var/log/logkeys.log"
@@ -472,6 +474,7 @@ int main(int argc, char **argv)
  unsigned int scan_code, prev_code = 0;  // the key code of the pressed key (some codes are from "scan code set 1", some are different (see <linux/input.h>)
  struct input_event event;
  char timestamp[32];  // timestamp string, long enough to hold format "\n%F %T%z > "
+  
+  bool capslock_in_effect = execute(COMMAND_STR_CAPSLOCK_STATE).size() >= 2;
  bool shift_in_effect = false;
  bool altgr_in_effect = false;
  bool ctrl_in_effect = false;  // used for identifying Ctrl+C / Ctrl+D
@@ -583,6 +586,9 @@ int main(int argc, char **argv)
        continue;  // but don't log "<Enter>"
      }
+  
+      if (scan_code == KEY_CAPSLOCK)
+  
+        capslock_in_effect = !capslock_in_effect;
+  
+
      if (scan_code == KEY_LEFTSHIFT || scan_code == KEY_RIGHTSHIFT)
        shift_in_effect = true;
      if (scan_code == KEY_RIGHTALT)
@@ -602,6 +608,16 @@ int main(int argc, char **argv)
              wch = char_keys[to_char_keys_index(scan_code)];
          }
        } 
+  
+
+  
+        else if (capslock_in_effect && iswalpha(char_keys[to_char_keys_index(scan_code)])) { // only bother with capslock if alpha
+  
+          if (shift_in_effect) // capslock and shift cancel each other
+  
+            wch = char_keys[to_char_keys_index(scan_code)];
+  
+          else
+  
+            wch = shift_keys[to_char_keys_index(scan_code)];
+  
+          if (wch == L'\0')
+  
+            wch = char_keys[to_char_keys_index(scan_code)];
+  
+        }
+  
+
        else if (shift_in_effect) {
          wch = shift_keys[to_char_keys_index(scan_code)];
          if (wch == L'\0')