fix rocksdb EnableFileDeletions(); fix test code

Summary: Ref T10566

Test Plan: N/A

Reviewers: sunweijie, cailiuyang

Reviewed By: sunweijie

Subscribers: #pegasus

Maniphest Tasks: T10566

Differential Revision: https://phabricator.d.xiaomi.net/D84866

rocksdb/db/db_filesnapshot.cc

@@ -58,12 +58,14 @@ Status DBImpl::EnableFileDeletions(bool force) {
       --disable_delete_obsolete_files_;
     }
     if (disable_delete_obsolete_files_ == 0)  {
-      should_purge_files = true;
       const uint64_t start_micros = env_->NowMicros();
       FindObsoleteFiles(&job_context, false);
       Log(InfoLogLevel::INFO_LEVEL, db_options_.info_log,
           "File Deletions Enabled, find obsoleted files elapsed: %" PRIu64 "ns",
           env_->NowMicros() - start_micros);
+      if (job_context.HaveSomethingToDelete()) {
+        should_purge_files = true;
+      }
     } else {
       Log(InfoLogLevel::WARN_LEVEL, db_options_.info_log,
           "File Deletions Enable, but not really enabled. Counter: %d",

run.sh

@@ -214,7 +214,7 @@ function run_test()
         pushd $ROOT/src/builder/bin/$module
         REPORT_DIR=$REPORT_DIR ./run.sh
         if [ $? != 0 ]; then
-            echo "run test \"$module\" in $pwd failed"
+            echo "run test \"$module\" in `pwd` failed"
             exit
         fi
         popd

src/test/function_test/global_env.cpp

@@ -22,7 +22,8 @@ global_env::global_env()
 
 void global_env::get_dirs()
 {
-    const char *cmd1 = "ps aux | grep pegasus_server | grep meta1 | awk '{print $2}'";
+    const char *cmd1 =
+        "ps aux | grep pegasus_server | grep '/meta1/pegasus_server' | awk '{print $2}'";
     std::stringstream ss1;
     assert(dsn::utils::pipe_execute(cmd1, ss1) == 0);
     int meta1_pid;