From f616f5dec6770eb6e0aa834b682f4e725d302992 Mon Sep 17 00:00:00 2001
From: "mergify[bot]" <37929162+mergify[bot]@users.noreply.github.com>
Date: Sun, 21 Jun 2020 19:31:38 +0000
Subject: [PATCH] ledger-tool: Ignore SIGUSR1 (#10730) (#10732)

Prevents warehouse archive calls getting KO'd by logrotate

(cherry picked from commit d42247c6524f249247ab39eb28cfe0da3069362e)

Co-authored-by: Trent Nelson <trent@solana.com>
---
 Cargo.lock              |  1 +
 ledger-tool/Cargo.toml  |  3 +++
 ledger-tool/src/main.rs | 10 ++++++++++
 3 files changed, 14 insertions(+)

diff --git a/Cargo.lock b/Cargo.lock
index 8d52523300..173a0e5b2e 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -4250,6 +4250,7 @@ dependencies = [
  "log 0.4.8",
  "serde_json",
  "serde_yaml",
+ "signal-hook",
  "solana-clap-utils",
  "solana-cli",
  "solana-ledger",
diff --git a/ledger-tool/Cargo.toml b/ledger-tool/Cargo.toml
index 394345cadb..198d3f3f1f 100644
--- a/ledger-tool/Cargo.toml
+++ b/ledger-tool/Cargo.toml
@@ -31,5 +31,8 @@ tempfile = "3.1.0"
 [dev-dependencies]
 assert_cmd = "1.0"
 
+[target."cfg(unix)".dependencies]
+signal-hook = "0.1.15"
+
 [package.metadata.docs.rs]
 targets = ["x86_64-unknown-linux-gnu"]
diff --git a/ledger-tool/src/main.rs b/ledger-tool/src/main.rs
index 59646b75ec..2081faef89 100644
--- a/ledger-tool/src/main.rs
+++ b/ledger-tool/src/main.rs
@@ -613,6 +613,16 @@ fn open_genesis_config_by(ledger_path: &Path, matches: &ArgMatches<'_>) -> Genes
 
 #[allow(clippy::cognitive_complexity)]
 fn main() {
+    // Ignore SIGUSR1 to prevent long-running calls being killed by logrotate
+    // in warehouse deployments
+    #[cfg(unix)]
+    {
+        // `register()` is unsafe because the action is called in a signal handler
+        // with the usual caveats. So long as this action body stays empty, we'll
+        // be fine
+        unsafe { signal_hook::register(signal_hook::SIGUSR1, || {}) }.unwrap();
+    }
+
     const DEFAULT_ROOT_COUNT: &str = "1";
     solana_logger::setup_with_default("solana=info");