Add .gitignore and inject.sh

.gitignore

@@ -0,0 +1,35 @@
+# Folders
+build/
+
+# Prerequisites
+*.d
+
+# Compiled Object files
+*.slo
+*.lo
+*.o
+*.obj
+
+# Precompiled Headers
+*.gch
+*.pch
+
+# Compiled Dynamic libraries
+*.so
+*.dylib
+*.dll
+
+# Fortran module files
+*.mod
+*.smod
+
+# Compiled Static libraries
+*.lai
+*.la
+*.a
+*.lib
+
+# Executables
+*.exe
+*.out
+*.app

inject.sh

@@ -0,0 +1,65 @@
+#!/bin/bash
+
+pid=$(pidof "hl2_linux")
+libpath=$(realpath "libcstrike-basehook.so")
+
+if [ "$pid" == "" ]; then
+   echo "inject.sh: process not running."
+   exit 1
+fi
+
+# Used to echo the command. For debugging.
+#set -x
+
+if [ "$1" == "unload" ]; then
+    sudo gdb -n -q -batch                                   \
+         -ex "attach $pid"                                  \
+         -ex "set \$dlopen = (void* (*)(char*, int))dlopen" \
+         -ex "set \$dlclose = (int (*)(void*))dlclose"      \
+         -ex "set \$dlerror =  (char* (*)(void))dlerror"    \
+                                                            \
+         -ex "set \$self = \$dlopen(\"$libpath\", 6)"       \
+         -ex "call \$dlclose(\$self)"                       \
+         -ex "call \$dlclose(\$self)"                       \
+                                                            \
+         -ex "call \$dlerror()"                             \
+         -ex "detach"                                       \
+         -ex "quit"
+
+    exit 0
+fi
+
+if grep -q "$libpath" "/proc/$pid/maps"; then
+    echo -e "goldsource-cheat already loaded. Reloading...\n";
+
+    # 0x2 -> RTLD_NOW
+    # 0x6 -> RTLD_LAZY | RTLD_NOLOAD
+    # For more info on the 3 mid lines, see self_unload() in main.c
+    sudo gdb -n -q -batch                                   \
+         -ex "attach $pid"                                  \
+         -ex "set \$dlopen = (void* (*)(char*, int))dlopen" \
+         -ex "set \$dlclose = (int (*)(void*))dlclose"      \
+         -ex "set \$dlerror =  (char* (*)(void))dlerror"    \
+                                                            \
+         -ex "set \$self = \$dlopen(\"$libpath\", 6)"       \
+         -ex "call \$dlclose(\$self)"                       \
+         -ex "call \$dlclose(\$self)"                       \
+                                                            \
+         -ex "call \$dlopen(\"$libpath\", 2)"               \
+         -ex "call \$dlerror()"                             \
+         -ex "detach"                                       \
+         -ex "quit"
+else
+    sudo gdb -n -q -batch                                   \
+         -ex "attach $pid"                                  \
+         -ex "set \$dlopen = (void* (*)(char*, int))dlopen" \
+         -ex "set \$dlclose = (int (*)(void*))dlclose"      \
+         -ex "set \$dlerror =  (char* (*)(void))dlerror"    \
+         -ex "call \$dlopen(\"$libpath\", 2)"               \
+         -ex "call \$dlerror()"                             \
+         -ex "detach"                                       \
+         -ex "quit"
+fi
+
+set +x
+echo -e "\nDone."