Make file access in cdr_custom similar to cdr_csv.

Fixes issue #12268.

Patch borrowed from r82344

git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@110779 65c4cc65-6c06-0410-ace0-fbb531ad65f3

diff --git a/cdr/cdr_custom.c b/cdr/cdr_custom.c
index 80cd47ecf09c41698a51d226d04ddaad9944a2f9..c390b049941b6f92edd4dbe2a60a1b321c037c1a 100644 (file)
--- a/cdr/cdr_custom.c
+++ b/cdr/cdr_custom.c
@@ -50,17 +50,17 @@ ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
 #include "asterisk/pbx.h"
 #include "asterisk/logger.h"
 #include "asterisk/utils.h"
+#include "asterisk/lock.h"
 
 #define CUSTOM_LOG_DIR "/cdr_custom"
 
 #define DATE_FORMAT "%Y-%m-%d %T"
 
 AST_MUTEX_DEFINE_STATIC(lock);
+AST_MUTEX_DEFINE_STATIC(mf_lock);
 
 static char *name = "cdr-custom";
 
-static FILE *mf = NULL;
-
 static char master[PATH_MAX];
 static char format[1024]="";
 
@@ -107,6 +107,8 @@ static int load_config(int reload)
 
 static int custom_log(struct ast_cdr *cdr)
 {
+       FILE *mf = NULL;
+
        /* Make sure we have a big enough buf */
        char buf[2048];
        struct ast_channel dummy;
@@ -124,23 +126,24 @@ static int custom_log(struct ast_cdr *cdr)
        /* because of the absolutely unconditional need for the
           highest reliability possible in writing billing records,
           we open write and close the log file each time */
+       ast_mutex_lock(&mf_lock);
        mf = fopen(master, "a");
-       if (!mf) {
-               ast_log(LOG_ERROR, "Unable to re-open master file %s : %s\n", master, strerror(errno));
-       }
        if (mf) {
                fputs(buf, mf);
                fflush(mf); /* be particularly anal here */
                fclose(mf);
                mf = NULL;
+               ast_mutex_unlock(&mf_lock);
+       } else {
+               ast_log(LOG_ERROR, "Unable to re-open master file %s : %s\n", master, strerror(errno));
+               ast_mutex_unlock(&mf_lock);
        }
+
        return 0;
 }
 
 static int unload_module(void)
 {
-       if (mf)
-               fclose(mf);
        ast_cdr_unregister(name);
        return 0;
 }
@@ -153,8 +156,6 @@ static int load_module(void)
                res = ast_cdr_register(name, ast_module_info->description, custom_log);
                if (res)
                        ast_log(LOG_ERROR, "Unable to register custom CDR handling\n");
-               if (mf)
-                       fclose(mf);
                return res;
        } else 
                return AST_MODULE_LOAD_DECLINE;