From 4a0b974b85f36011fb1a8c17bf59bc272d96a522 Mon Sep 17 00:00:00 2001
From: Egor Tensin <Egor.Tensin@gmail.com>
Date: Tue, 4 Jul 2023 16:43:52 +0200
Subject: tcp_server: always clean up connection descriptors

---
 src/file.c       | 14 ++++++++++++++
 src/file.h       |  1 +
 src/server.c     |  6 ++++++
 src/tcp_server.c |  6 +++---
 4 files changed, 24 insertions(+), 3 deletions(-)

diff --git a/src/file.c b/src/file.c
index eb7135a..27709be 100644
--- a/src/file.c
+++ b/src/file.c
@@ -9,6 +9,7 @@
 #include "compiler.h"
 #include "log.h"
 
+#include <fcntl.h>
 #include <ftw.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -98,6 +99,19 @@ free:
 	return NULL;
 }
 
+int file_dup(int fd)
+{
+	int ret = 0;
+
+	ret = fcntl(fd, F_DUPFD_CLOEXEC, 0);
+	if (ret < 0) {
+		log_errno("fcntl");
+		return ret;
+	}
+
+	return ret;
+}
+
 void file_close(int fd)
 {
 	log_errno_if(close(fd), "close");
diff --git a/src/file.h b/src/file.h
index c25ef40..b4bba62 100644
--- a/src/file.h
+++ b/src/file.h
@@ -15,6 +15,7 @@ int rm_rf(const char *dir);
 int my_chdir(const char *dir, char **old);
 char *my_readlink(const char *path);
 
+int file_dup(int fd);
 void file_close(int fd);
 
 int file_exists(const char *path);
diff --git a/src/server.c b/src/server.c
index 678f1c9..ee605c0 100644
--- a/src/server.c
+++ b/src/server.c
@@ -10,6 +10,7 @@
 #include "compiler.h"
 #include "const.h"
 #include "event_loop.h"
+#include "file.h"
 #include "log.h"
 #include "msg.h"
 #include "run_queue.h"
@@ -221,6 +222,11 @@ static int server_handle_cmd_new_worker(UNUSED const struct msg *request,
 	struct worker *worker = NULL;
 	int ret = 0;
 
+	ret = file_dup(client_fd);
+	if (ret < 0)
+		return ret;
+	client_fd = ret;
+
 	ret = worker_create(&worker, client_fd);
 	if (ret < 0)
 		return ret;
diff --git a/src/tcp_server.c b/src/tcp_server.c
index fe55e4f..221b27e 100644
--- a/src/tcp_server.c
+++ b/src/tcp_server.c
@@ -72,13 +72,13 @@ static void *connection_thread(void *_ctx)
 	 * handled in the main thread. */
 	ret = signal_block_sigterms();
 	if (ret < 0)
-		goto free_ctx;
+		goto close;
 
 	ctx->conn_handler(ctx->fd, ctx->arg);
 
-free_ctx:
+close:
+	net_close(ctx->fd);
 	free(ctx);
-
 	return NULL;
 }
 
-- 
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