diff --git a/src/config.c b/src/config.c
index 82d1bb7..df88870 100644
--- a/src/config.c
+++ b/src/config.c
@@ -14,12 +14,13 @@ ConfigData *load_config() {
     DEBUG_LOG("Attaching to shared memory for config data");
 
     // 不指定大小，让shmget自动获取已存在的共享内存段大小
-    int shm_id = shmget(SHM_KEY, SHM_SIZE, 0);  // 把size参数设为0
+    int shm_id = shmget(SHM_KEY, SHM_SIZE, IPC_CREAT | 0640);  // 把size参数设为0
 
     DEBUG_LOG("shm_id is: %d", shm_id);
 
     if (shm_id == -1) {
         DEBUG_LOG("shmget failed");
+        DEBUG_LOG("err: %d", errno);
         return NULL;
     }
 
@@ -31,6 +32,6 @@ ConfigData *load_config() {
         return NULL;
     }
     DEBUG_LOG("Successfully attached to shared memory");
-    DEBUG_LOG("Current configuration has %d rules", shared_config->rule_count);
+    DEBUG_LOG("Current configuration has %d rules", shared_config == NULL? -1 : shared_config->rule_count);
     return shared_config;
 }
\ No newline at end of file
diff --git a/src/config.h b/src/config.h
index c62285c..487ac74 100644
--- a/src/config.h
+++ b/src/config.h
@@ -3,6 +3,8 @@
 
 #include "exec_hook.h"
 
+#define HOOK 1
+
 ConfigData *load_config();
 
 #endif // CONFIG_H
\ No newline at end of file
diff --git a/src/exec_hook.h b/src/exec_hook.h
index 389d395..9b95b16 100644
--- a/src/exec_hook.h
+++ b/src/exec_hook.h
@@ -51,6 +51,6 @@
 #define ANSI_COLOR_BLUE "\x1b[34m"
 
 #define SHM_KEY 0x78945
-#define SHM_SIZE 512 * 1024
+#define SHM_SIZE 1024 * 1024
 
 #endif  // EXEC_HOOK_H
\ No newline at end of file
diff --git a/src/struct.h b/src/struct.h
index ebbba4a..7706382 100644
--- a/src/struct.h
+++ b/src/struct.h
@@ -3,13 +3,17 @@
 
 #define _GNU_SOURCE
 #define MAX_RULES 128
-#define MAX_ARGS 10
+#define MAX_ARGS 32
+#define MAX_RULE_CMD_LEN 256
+#define MAX_TYPE_LEN 32
+#define MAX_MSG_LEN 256
+#define MAX_ARGS_LEN 128
 
 typedef struct {
-	char cmd[256];
-	char type[32];
-	char msg[1024];
-	char args[MAX_ARGS][256];
+	char cmd[MAX_RULE_CMD_LEN];
+	char type[MAX_TYPE_LEN];
+	char msg[MAX_MSG_LEN];
+	char args[MAX_ARGS][MAX_ARGS_LEN];
 	int arg_count;
 } Rule;