From f17e096eaa6b13c080148a384dc8a5058b5ab5d2 Mon Sep 17 00:00:00 2001
From: Unbewohnte <me@unbewohnte.su>
Date: Sat, 25 Mar 2023 17:33:35 +0300
Subject: [PATCH] Fix path_free() not actually NULL-ing the pointer

---
 README.md |  8 ++++----
 libpath.c | 11 ++++++-----
 libpath.h |  4 ++--
 test.c    |  6 +++---
 4 files changed, 15 insertions(+), 14 deletions(-)

diff --git a/README.md b/README.md
index 806eba2..1ed66bc 100644
--- a/README.md
+++ b/README.md
@@ -24,14 +24,14 @@ int main() {
     char* parent = path_parent(path);
     printf("Parent: %s\n", parent);
 
-    path_free(path);
+    path_free(&path);
 
     char* parent_of_parent = path_parent(parent);
     printf("Parent of parent: %s\n", parent_of_parent);
     
-    path_free(parent);
-    path_free(parent_of_parent);
-
+    path_free(&parent);
+    path_free(&parent_of_parent);
+    
     return EXIT_SUCCESS;
 }
 ```
diff --git a/libpath.c b/libpath.c
index 855a642..a4cb2a9 100644
--- a/libpath.c
+++ b/libpath.c
@@ -124,9 +124,9 @@ char* path_join(unsigned int count, ...) {
 }
 
 // Frees path and sets pointer to NULL
-void path_free(char* path) {
-    free(path);
-    path = NULL;
+void path_free(char** path) {
+    free(*path);
+    *path = NULL;
 }
 
 /*
@@ -171,7 +171,8 @@ char* path_parent(const char* path) {
     base_path[last_separator_index] = '\0';
 
     // free temporary cleaned path
-    path_free(clean_path);
+    path_free(&clean_path);
 
     return base_path;
-}
\ No newline at end of file
+}
+
diff --git a/libpath.h b/libpath.h
index 02dc943..2bc5adc 100644
--- a/libpath.h
+++ b/libpath.h
@@ -32,10 +32,10 @@ Be sure to path_free() after use.
 char* path_join(unsigned int count, ...);
 
 // Frees path and sets pointer to NULL
-void path_free(char* path);
+void path_free(char** path);
 
 /*
 Creates a new path pointing to the parent.
 Be sure to path_free() on the base as well after use.
 */
-char* path_parent(const char* path);
\ No newline at end of file
+char* path_parent(const char* path);
diff --git a/test.c b/test.c
index 76b55e8..887df01 100644
--- a/test.c
+++ b/test.c
@@ -22,13 +22,13 @@ int main() {
     char* parent = path_parent(path);
     printf("Parent: %s\n", parent);
 
-    path_free(path);
+    path_free(&path);
 
     char* parent_of_parent = path_parent(parent);
     printf("Parent of parent: %s\n", parent_of_parent);
     
-    path_free(parent);
-    path_free(parent_of_parent);
+    path_free(&parent);
+    path_free(&parent_of_parent);
     
     return EXIT_SUCCESS;
 }
\ No newline at end of file