Merge bitcoin/bitcoin#30255: log: use error level for critical log messages

fae3a1f0065064d80ab4c0375a9eaeb666c5dd55 log: use error level for critical log messages (MarcoFalke)

Pull request description:

  This picks up the first commit from https://github.com/bitcoin/bitcoin/pull/29231, but extends it to also cover cases that were missed in it.

  As per https://github.com/bitcoin/bitcoin/blob/master/doc/developer-notes.md#logging, LogError should be used for severe problems that require the node to shut down.

ACKs for top commit:
  stickies-v:
    re-ACK fae3a1f0065064d80ab4c0375a9eaeb666c5dd55, I'm ~0 on the latest force push as `user_error` was already logged at the right level through `GetNotifications().fatalError(user_error);` so I'd be in favour of deduplicating/cleaning up this logging logic but can be done in follow-up.
  kevkevinpal:
    ACK [fae3a1f](https://github.com/bitcoin/bitcoin/pull/30255/commits/fae3a1f0065064d80ab4c0375a9eaeb666c5dd55)
  achow101:
    ACK fae3a1f0065064d80ab4c0375a9eaeb666c5dd55

Tree-SHA512: 3f99fd25d5a204d570a42d8fb2b450439aad7685692f9594cc813d97253c4df172a6ff3cf818959bfcf25dfcf8ee9a9c9ccc6028fcfcecdb47591e18c77ef246

1 files changed, 8 insertions, 8 deletions

diff --git a/src/init.cpp b/src/init.cpp
index dec391bb49..b7d4c72b0a 100644
--- a/src/init.cpp
+++ b/src/init.cpp
@@ -409,7 +409,7 @@ static void HandleSIGHUP(int)
 static BOOL WINAPI consoleCtrlHandler(DWORD dwCtrlType)
 {
     if (!(*Assert(g_shutdown))()) {
-        LogPrintf("Error: failed to send shutdown signal on Ctrl-C\n");
+        LogError("Failed to send shutdown signal on Ctrl-C\n");
         return false;
     }
     Sleep(INFINITE);
@@ -840,7 +840,7 @@ std::set<BlockFilterType> g_enabled_filter_types;
     // Since LogPrintf may itself allocate memory, set the handler directly
     // to terminate first.
     std::set_new_handler(std::terminate);
-    LogPrintf("Error: Out of memory. Terminating.\n");
+    LogError("Out of memory. Terminating.\n");
 
     // The log was successful, terminate now.
     std::terminate();
@@ -1175,9 +1175,9 @@ bool AppInitMain(NodeContext& node, interfaces::BlockAndHeaderTipInfo* tip_info)
     scheduler.scheduleEvery([&args, &node]{
         constexpr uint64_t min_disk_space = 50 << 20; // 50 MB
         if (!CheckDiskSpace(args.GetBlocksDirPath(), min_disk_space)) {
-            LogPrintf("Shutting down due to lack of disk space!\n");
+            LogError("Shutting down due to lack of disk space!\n");
             if (!(*Assert(node.shutdown))()) {
-                LogPrintf("Error: failed to send shutdown signal after disk space check\n");
+                LogError("Failed to send shutdown signal after disk space check\n");
             }
         }
     }, std::chrono::minutes{5});
@@ -1582,7 +1582,7 @@ bool AppInitMain(NodeContext& node, interfaces::BlockAndHeaderTipInfo* tip_info)
             try {
                 return f();
             } catch (const std::exception& e) {
-                LogPrintf("%s\n", e.what());
+                LogError("%s\n", e.what());
                 return std::make_tuple(node::ChainstateLoadStatus::FAILURE, _("Error opening block database"));
             }
         };
@@ -1614,10 +1614,10 @@ bool AppInitMain(NodeContext& node, interfaces::BlockAndHeaderTipInfo* tip_info)
                 if (fRet) {
                     do_reindex = true;
                     if (!Assert(node.shutdown)->reset()) {
-                        LogPrintf("Internal error: failed to reset shutdown signal.\n");
+                        LogError("Internal error: failed to reset shutdown signal.\n");
                     }
                 } else {
-                    LogPrintf("Aborted block database rebuild. Exiting.\n");
+                    LogError("Aborted block database rebuild. Exiting.\n");
                     return false;
                 }
             } else {
@@ -1752,7 +1752,7 @@ bool AppInitMain(NodeContext& node, interfaces::BlockAndHeaderTipInfo* tip_info)
         if (args.GetBoolArg("-stopafterblockimport", DEFAULT_STOPAFTERBLOCKIMPORT)) {
             LogPrintf("Stopping after block import\n");
             if (!(*Assert(node.shutdown))()) {
-                LogPrintf("Error: failed to send shutdown signal after finishing block import\n");
+                LogError("Failed to send shutdown signal after finishing block import\n");
             }
             return;
         }