Avoid exceptions

src/server.cpp

@@ -9,7 +9,6 @@
 #include <netdb.h>
 #include <netinet/tcp.h>
 #include <pthread.h>
-#include <stdexcept>
 #include <sys/epoll.h>
 #include <sys/socket.h>
 #include <sys/un.h>
@@ -39,12 +38,12 @@ Server::Server(const weaseldb::Config &config, ConnectionHandler &handler,
   for (int fd : listen_fds_) {
     int flags = fcntl(fd, F_GETFL, 0);
     if (flags == -1) {
-      perror("fcntl F_GETFL on provided listen fd");
-      throw std::runtime_error("Failed to get flags for provided listen fd");
+      perror("fcntl F_GETFL");
+      std::abort();
     }
     if (fcntl(fd, F_SETFL, flags | O_NONBLOCK) == -1) {
-      perror("fcntl F_SETFL O_NONBLOCK on provided listen fd");
-      throw std::runtime_error("Failed to set provided listen fd non-blocking");
+      perror("fcntl F_SETFL O_NONBLOCK");
+      std::abort();
     }
   }
 
@@ -179,14 +178,14 @@ int Server::createLocalConnection() {
 
   int flags = fcntl(server_fd, F_GETFL, 0);
   if (flags == -1) {
-    perror("fcntl F_GETFL on provided listen fd");
-    throw std::runtime_error(
-        "Failed to get flags for server side of local connection");
+    std::fprintf(stderr,
+                 "Server::createLocalConnection: fcntl F_GETFL failed\n");
+    std::abort();
   }
   if (fcntl(server_fd, F_SETFL, flags | O_NONBLOCK) == -1) {
-    perror("fcntl F_SETFL O_NONBLOCK on provided listen fd");
-    throw std::runtime_error(
-        "Failed to set server side of local connection to non-blocking");
+    std::fprintf(stderr,
+                 "Server::createLocalConnection: fcntl F_SETFL failed\n");
+    std::abort();
   }
 
   // Create sockaddr_storage for the connection
@@ -226,14 +225,14 @@ int Server::createLocalConnection() {
 void Server::setup_shutdown_pipe() {
   if (pipe(shutdown_pipe_) == -1) {
     perror("pipe");
-    throw std::runtime_error("Failed to create shutdown pipe");
+    std::abort();
   }
 
   // Set both ends to close-on-exec
   if (fcntl(shutdown_pipe_[0], F_SETFD, FD_CLOEXEC) == -1 ||
       fcntl(shutdown_pipe_[1], F_SETFD, FD_CLOEXEC) == -1) {
     perror("fcntl FD_CLOEXEC");
-    throw std::runtime_error("Failed to set close-on-exec for shutdown pipe");
+    std::abort();
   }
 }
 
@@ -244,8 +243,8 @@ void Server::create_epoll_instances() {
   for (int i = 0; i < config_.server.epoll_instances; ++i) {
     epoll_fds_[i] = epoll_create1(EPOLL_CLOEXEC);
     if (epoll_fds_[i] == -1) {
-      perror("epoll_create");
-      throw std::runtime_error("Failed to create epoll instance");
+      perror("epoll_create1");
+      std::abort();
     }
 
     // Add shutdown pipe to each epoll instance
@@ -256,7 +255,7 @@ void Server::create_epoll_instances() {
     if (epoll_ctl(epoll_fds_[i], EPOLL_CTL_ADD, shutdown_pipe_[0],
                   &shutdown_event) == -1) {
       perror("epoll_ctl shutdown pipe");
-      throw std::runtime_error("Failed to add shutdown pipe to epoll");
+      std::abort();
     }
 
     // Add all listen sockets to each epoll instance with EPOLLEXCLUSIVE to
@@ -268,7 +267,7 @@ void Server::create_epoll_instances() {
       if (epoll_ctl(epoll_fds_[i], EPOLL_CTL_ADD, listen_fd, &listen_event) ==
           -1) {
         perror("epoll_ctl listen socket");
-        throw std::runtime_error("Failed to add listen socket to epoll");
+        std::abort();
       }
     }
   }