From d82685c027edef9f7ca73a98413d7ec562391dbd Mon Sep 17 00:00:00 2001
From: Andrea Possemato
Date: Tue, 5 Apr 2016 11:18:59 +0200
Subject: Gdb env

Add gdb detection via environment variables---
 detect/env.c  | 37 +++++++++++++++++++++++++++++++++++++
 detect/env.h  |  7 +++++++
 detect/gdb.c  |  1 +
 detect/main.c | 25 ++++++++++++++++++++++++-
 4 files changed, 69 insertions(+), 1 deletion(-)
 create mode 100644 detect/env.c
 create mode 100644 detect/env.h

diff --git a/detect/env.c b/detect/env.c
new file mode 100644
index 0000000..6782f8d
--- /dev/null
+++ b/detect/env.c
@@ -0,0 +1,37 @@
+/*
+ * Detect GDB using env
+ *
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+int gdb_columns() {
+    return (getenv("COLUMNS") != NULL);
+}
+
+int gdb_lines() {
+    return (getenv("LINES") != NULL);
+}
+
+int gdb_path() {
+    char *gdb_path = getenv("_");
+    if (gdb_path == NULL) {
+      return 0;
+    }
+    char *block_path = strtok(gdb_path, "/");
+    char *str = NULL;
+    while (block_path != NULL) {
+       str = block_path;
+       block_path = strtok(NULL, "/");
+    }
+    if (str == NULL) {
+      return 0;
+    }
+    else {
+      return !strcmp(str,"gdb");
+    }
+    
+}
+
diff --git a/detect/env.h b/detect/env.h
new file mode 100644
index 0000000..7cde9af
--- /dev/null
+++ b/detect/env.h
@@ -0,0 +1,7 @@
+#ifndef _ENV_
+#define _ENV_
+int gdb_columns();
+int gdb_lines();
+int gdb_path();
+#endif
+
diff --git a/detect/gdb.c b/detect/gdb.c
index fd0dacd..00336d6 100644
--- a/detect/gdb.c
+++ b/detect/gdb.c
@@ -6,6 +6,7 @@
 
 #include <signal.h>
 #include <stdio.h>
+#include <unistd.h>
 #include <stdlib.h>
 #include <string.h>
 #include <sys/ptrace.h>
diff --git a/detect/main.c b/detect/main.c
index 09e7515..47b9c19 100644
--- a/detect/main.c
+++ b/detect/main.c
@@ -6,7 +6,7 @@
 
 #include "gdb.h"
 #include "various.h"
-
+#include "env.h"
 
 int main(int argc, char** argv){
     unsigned int res = 0;
@@ -68,5 +68,28 @@ int main(int argc, char** argv){
     else
         printf("\n[ ] Everything seems fine\n");
 
+    res = 0;
+    printf("\n\n");
+    printf(".: GDB env detector :.\n\n");
+
+    if(res += gdb_columns())
+        printf("[x] COLUMNS_ENV\n");
+    else
+        printf("[ ] COLUMNS_ENV\n");
+
+    if(res += gdb_lines())
+        printf("[x] LINES_ENV\n");
+    else
+        printf("[ ] LINES_ENV\n");
+
+    if(res += gdb_path())
+        printf("[x] GDB_ENV\n");
+    else
+        printf("[ ] GDB_ENV\n");
+
+    if(res)
+        printf("\n[*] GDB detected\n");
+    else
+        printf("\n[ ] No GDB detected\n");
     return 0;
 }
-- 
cgit v1.3