diff --git a/include/spdlog/sinks/ansicolor_sink-inl.h b/include/spdlog/sinks/ansicolor_sink-inl.h
index 61c0a719..9142ebcf 100644
--- a/include/spdlog/sinks/ansicolor_sink-inl.h
+++ b/include/spdlog/sinks/ansicolor_sink-inl.h
@@ -52,9 +52,9 @@ SPDLOG_INLINE void ansicolor_sink<ConsoleMutex>::log(const details::log_msg &msg
         // before color range
         print_range_(formatted, 0, msg.color_range_start);
         // in color range
-        print_ccode_(colors_[msg.level]);
+        print_view_(colors_[msg.level]);
         print_range_(formatted, msg.color_range_start, msg.color_range_end);
-        print_ccode_(reset);
+        print_view_(reset);
         // after color range
         print_range_(formatted, msg.color_range_end, formatted.size());
     }
@@ -62,14 +62,20 @@ SPDLOG_INLINE void ansicolor_sink<ConsoleMutex>::log(const details::log_msg &msg
     {
         print_range_(formatted, 0, formatted.size());
     }
-    fflush(target_file_);
+    if (fflush(target_file_))
+    {
+        throw_spdlog_ex("ansicolor_sink: fflush() failed", errno);
+    }
 }
 
 template<typename ConsoleMutex>
 SPDLOG_INLINE void ansicolor_sink<ConsoleMutex>::flush()
 {
     std::lock_guard<mutex_t> lock(mutex_);
-    fflush(target_file_);
+    if (0 != fflush(target_file_))
+    {
+        throw_spdlog_ex("ansicolor_sink: fflush() failed", errno);
+    }
 }
 
 template<typename ConsoleMutex>
@@ -112,15 +118,18 @@ SPDLOG_INLINE void ansicolor_sink<ConsoleMutex>::set_color_mode(color_mode mode)
 }
 
 template<typename ConsoleMutex>
-SPDLOG_INLINE void ansicolor_sink<ConsoleMutex>::print_ccode_(const string_view_t &color_code)
+SPDLOG_INLINE void ansicolor_sink<ConsoleMutex>::print_view_(const string_view_t &sv)
 {
-    fwrite(color_code.data(), sizeof(char), color_code.size(), target_file_);
+    if (sv.size() != fwrite(sv.data(), sizeof(char), sv.size(), target_file_))
+    {
+        throw_spdlog_ex("ansicolor_sink: fwrite() failed", errno);
+    }
 }
 
 template<typename ConsoleMutex>
 SPDLOG_INLINE void ansicolor_sink<ConsoleMutex>::print_range_(const memory_buf_t &formatted, size_t start, size_t end)
 {
-    fwrite(formatted.data() + start, sizeof(char), end - start, target_file_);
+    print_view_(string_view_t{formatted.data() + start, end - start});
 }
 
 template<typename ConsoleMutex>
diff --git a/include/spdlog/sinks/ansicolor_sink.h b/include/spdlog/sinks/ansicolor_sink.h
index 4438f706..8733ab63 100644
--- a/include/spdlog/sinks/ansicolor_sink.h
+++ b/include/spdlog/sinks/ansicolor_sink.h
@@ -85,7 +85,7 @@ private:
     bool should_do_colors_;
     std::unique_ptr<spdlog::formatter> formatter_;
     std::array<std::string, level::n_levels> colors_;
-    void print_ccode_(const string_view_t &color_code);
+    void print_view_(const string_view_t &sv);
     void print_range_(const memory_buf_t &formatted, size_t start, size_t end);
     static std::string to_string_(const string_view_t &sv);
 };
diff --git a/include/spdlog/sinks/stdout_sinks-inl.h b/include/spdlog/sinks/stdout_sinks-inl.h
index 9122152a..efa147bd 100644
--- a/include/spdlog/sinks/stdout_sinks-inl.h
+++ b/include/spdlog/sinks/stdout_sinks-inl.h
@@ -60,7 +60,10 @@ SPDLOG_INLINE void stdout_sink_base<ConsoleMutex>::log(const details::log_msg &m
     std::lock_guard<mutex_t> lock(mutex_);
     memory_buf_t formatted;
     formatter_->format(msg, formatted);
-    ::fflush(file_); // flush in case there is somthing in this file_ already
+    if (0 != ::fflush(file_)) // flush in case there is something in this file_ already
+    {
+        throw_spdlog_ex("stdout_sink_base: fflush() failed", errno);
+    }
     auto size = static_cast<DWORD>(formatted.size());
     DWORD bytes_written = 0;
     bool ok = ::WriteFile(handle_, formatted.data(), size, &bytes_written, nullptr) != 0;
@@ -72,8 +75,14 @@ SPDLOG_INLINE void stdout_sink_base<ConsoleMutex>::log(const details::log_msg &m
     std::lock_guard<mutex_t> lock(mutex_);
     memory_buf_t formatted;
     formatter_->format(msg, formatted);
-    ::fwrite(formatted.data(), sizeof(char), formatted.size(), file_);
-    ::fflush(file_); // flush every line to terminal
+    if (formatted.size() != ::fwrite(formatted.data(), sizeof(char), formatted.size(), file_))
+    {
+        throw_spdlog_ex("stdout_sink_base: fwrite() failed", errno);
+    }
+    if (0 != ::fflush(file_)) // flush every line to terminal
+    {
+        throw_spdlog_ex("stdout_sink_base: fflush() failed", errno);
+    }
 #endif // WIN32    
 }
 
@@ -81,7 +90,10 @@ template<typename ConsoleMutex>
 SPDLOG_INLINE void stdout_sink_base<ConsoleMutex>::flush()
 {
     std::lock_guard<mutex_t> lock(mutex_);
-    fflush(file_);
+    if (0 != ::fflush(file_))
+    {
+        throw_spdlog_ex("stdout_sink_base: Failed flushing stdout", errno);
+    }
 }
 
 template<typename ConsoleMutex>