[MPlayer-dev-eng] [PATCH][Trac 2311] codec_path mem leak

[Alexander Strasser]

Hello all,

while investigating the leaks pointed out in ticket #2311, I found
that the attached patch fixes the remaining leak.

The current code seems pretty wrong. At least, as I understand it,
the function set_codec_path ever only got called once. The implementation
combined with exporting the codec_path global var seems not solid at all.

Still I feel like I am missing something...
It seems to easy to be true, maybe some of you can have a look or test.
I only tested by debug printing the value of codec_path after common_init
in mplayer.c, and not actually loading a binary codec.


  Alexander
-------------- next part --------------
>From 574fb28e7f6411300776d06bc62d23c5bb82da24 Mon Sep 17 00:00:00 2001
From: Alexander Strasser <eclipse7 at gmx.net>
Date: Wed, 4 Jan 2017 23:45:30 +0100
Subject: [PATCH] mpcommon/common_init: Avoid creating a mem leak of codec_path

The codec path is set by the config system anyway. Setting it again
and assuming the original value wasn't already duplicated by the
config system just creates a mem leak.

This change also simplifies the code because function set_codec_path
isn't needed anymore.

Fixes part of ticket 2311
---
 mpcommon.c |  3 ---
 path.c     | 16 ----------------
 path.h     |  1 -
 3 files changed, 20 deletions(-)

diff --git a/mpcommon.c b/mpcommon.c
index ebc9711e6..211828c49 100644
--- a/mpcommon.c
+++ b/mpcommon.c
@@ -588,9 +588,6 @@ int common_init(void)
     set_priority();
 #endif
 
-    if (codec_path)
-        set_codec_path(codec_path);
-
     /* Check codecs.conf. */
     if (!codecs_file || !parse_codec_cfg(codecs_file)) {
         char *conf_path = get_path("codecs.conf");
diff --git a/path.c b/path.c
index b8d9335fe..e6287d220 100644
--- a/path.c
+++ b/path.c
@@ -174,22 +174,6 @@ void set_path_env(void)
 
 char *codec_path = BINARY_CODECS_PATH;
 
-static int needs_free = 0;
-
-void set_codec_path(const char *path)
-{
-    if (needs_free)
-        free(codec_path);
-    if (path == 0) {
-        codec_path = BINARY_CODECS_PATH;
-        needs_free = 0;
-        return;
-    }
-    codec_path = malloc(strlen(path) + 1);
-    strcpy(codec_path, path);
-    needs_free = 1;
-}
-
 /**
  * @brief Returns the basename substring of a path.
  */
diff --git a/path.h b/path.h
index 1389fc491..0f4594340 100644
--- a/path.h
+++ b/path.h
@@ -25,7 +25,6 @@ extern char *codec_path;
 
 char *get_path(const char *filename);
 void set_path_env(void);
-void set_codec_path(const char *path);
 const char *mp_basename(const char *path);
 char *mp_dirname(const char *path);
 char *mp_path_join(const char *base, const char *new_path);
-- 
2.11.0