log/eve: Threaded filename change: eve.N.json

This commit changes the name of the file used with threaded eve logging
to better support log rotation

Instead of using "eve.json.N" and creating potential issues with log
rotation (which also uses a ".N" suffix), the eve logs will be named
"eve.N.json" when threaded.

src/util-logopenfile.c

@@ -44,8 +44,8 @@
 static bool LogFileNewThreadedCtx(LogFileCtx *parent_ctx, const char *log_path, const char *append, int i);
 static bool SCLogOpenThreadedFileFp(const char *log_path, const char *append, LogFileCtx *parent_ctx, int slot_count);
 
-// Threaded eve.json suffixes
-static SC_ATOMIC_DECL_AND_INIT_WITH_VAL(uint32_t, eve_file_suffix, 1);
+// Threaded eve.json identifier
+static SC_ATOMIC_DECL_AND_INIT_WITH_VAL(uint32_t, eve_file_id, 1);
 
 #ifdef BUILD_WITH_UNIXSOCKET
 /** \brief connect to the indicated local stream socket, logging any errors
@@ -708,6 +708,50 @@ LogFileCtx *LogFileEnsureExists(LogFileCtx *parent_ctx, int thread_id)
     return parent_ctx->threads->lf_slots[thread_id];
 }
 
+/** \brief LogFileThreadedName() Create file name for threaded EVE storage
+ *
+ */
+static bool LogFileThreadedName(
+        const char *original_name, char *threaded_name, size_t len, uint32_t unique_id)
+{
+    const char *base = SCBasename(original_name);
+    if (!base) {
+        FatalError(SC_ERR_FATAL,
+                "Invalid filename for threaded mode \"%s\"; "
+                "no basename found.",
+                original_name);
+    }
+
+    /* Check if basename has an extension */
+    char *dot = strrchr(base, '.');
+    if (dot) {
+        char *tname = SCStrdup(original_name);
+        if (!tname) {
+            return false;
+        }
+
+        /* Fetch extension location from original, not base
+         * for update
+         */
+        dot = strrchr(original_name, '.');
+        int dotpos = dot - original_name;
+        tname[dotpos] = '\0';
+        char *ext = tname + dotpos + 1;
+        if (strlen(tname) && strlen(ext)) {
+            snprintf(threaded_name, len, "%s.%d.%s", tname, unique_id, ext);
+        } else {
+            FatalError(SC_ERR_FATAL,
+                    "Invalid filename for threaded mode \"%s\"; "
+                    "filenames must include an extension, e.g: \"name.ext\"",
+                    original_name);
+        }
+        SCFree(tname);
+    } else {
+        snprintf(threaded_name, len, "%s.%d", original_name, unique_id);
+    }
+    return true;
+}
+
 /** \brief LogFileNewThreadedCtx() Create file context for threaded output
  * \param parent_ctx
  * \param log_path
@@ -724,7 +768,10 @@ static bool LogFileNewThreadedCtx(LogFileCtx *parent_ctx, const char *log_path,
 
     *thread = *parent_ctx;
     char fname[NAME_MAX];
-    snprintf(fname, sizeof(fname), "%s.%d", log_path, SC_ATOMIC_ADD(eve_file_suffix, 1));
+    if (!LogFileThreadedName(log_path, fname, sizeof(fname), SC_ATOMIC_ADD(eve_file_id, 1))) {
+        SCLogError(SC_ERR_MEM_ALLOC, "Unable to create threaded filename for log");
+        goto error;
+    }
     SCLogDebug("Thread open -- using name %s [replaces %s]", fname, log_path);
     thread->fp = SCLogOpenFileFp(fname, append, thread->filemode);
     if (thread->fp == NULL) {
@@ -748,7 +795,7 @@ static bool LogFileNewThreadedCtx(LogFileCtx *parent_ctx, const char *log_path,
     return true;
 
 error:
-    SC_ATOMIC_SUB(eve_file_suffix, 1);
+    SC_ATOMIC_SUB(eve_file_id, 1);
     if (thread->fp) {
         thread->Close(thread);
     }