Add [[nodiscard]] to Write2 and CheckedWrite too

4 files changed, 6 insertions, 6 deletions

diff --git a/fastos/src/vespa/fastos/file.cpp b/fastos/src/vespa/fastos/file.cpp
index fc7074d7815..4f585e7daeb 100644
--- a/fastos/src/vespa/fastos/file.cpp
+++ b/fastos/src/vespa/fastos/file.cpp
@@ -245,8 +245,8 @@ FastOS_FileInterface::CopyFile( const char *src, const char *dst )
                 do {
                     unsigned int readBytes = s.Read( tmpBuf, bufSize );
                     if (readBytes > 0) {
-
-                        if ( !d.CheckedWrite( tmpBuf, readBytes)) {
+                        ssize_t written = d.Write2(tmpBuf, readBytes);
+                        if ( written != readBytes) {
                             success = false;
                         }
                         copied += readBytes;
diff --git a/fastos/src/vespa/fastos/file.h b/fastos/src/vespa/fastos/file.h
index aa8f495d064..611e179adf0 100644
--- a/fastos/src/vespa/fastos/file.h
+++ b/fastos/src/vespa/fastos/file.h
@@ -334,7 +334,7 @@ public:
      * @param len     number of bytes to write
      * @return Boolean success/failure
      */
-    bool CheckedWrite(const void *buffer, size_t len);
+    [[nodiscard]] bool CheckedWrite(const void *buffer, size_t len);
 
     /**
      * Write [len] bytes from [buffer].
@@ -342,7 +342,7 @@ public:
      * @param len     number of bytes to write
      * @return The number of bytes actually written, or -1 on error
      */
-    virtual ssize_t Write2(const void *buffer, size_t len) = 0;
+    [[nodiscard]] virtual ssize_t Write2(const void *buffer, size_t len) = 0;
 
     /**
      * Read [length] bytes into [buffer]. Caution! If the actual number
diff --git a/fastos/src/vespa/fastos/linux_file.h b/fastos/src/vespa/fastos/linux_file.h
index ababf51d26d..6ba5cdc8fea 100644
--- a/fastos/src/vespa/fastos/linux_file.h
+++ b/fastos/src/vespa/fastos/linux_file.h
@@ -37,7 +37,7 @@ public:
 
 
     ssize_t Read(void *buffer, size_t len) override;
-    ssize_t Write2(const void *buffer, size_t len) override;
+    [[nodiscard]] ssize_t Write2(const void *buffer, size_t len) override;
     bool Open(unsigned int openFlags, const char *filename) override;
 
     static bool InitializeClass();
diff --git a/fastos/src/vespa/fastos/unix_file.h b/fastos/src/vespa/fastos/unix_file.h
index 891b5e0dba7..86e89ffde95 100644
--- a/fastos/src/vespa/fastos/unix_file.h
+++ b/fastos/src/vespa/fastos/unix_file.h
@@ -59,7 +59,7 @@ public:
 
     void ReadBuf(void *buffer, size_t length, int64_t readOffset) override;
     ssize_t Read(void *buffer, size_t len) override;
-    ssize_t Write2(const void *buffer, size_t len) override;
+    [[nodiscard]] ssize_t Write2(const void *buffer, size_t len) override;
     bool Open(unsigned int openFlags, const char *filename) override;
     [[nodiscard]] bool Close() override;
     bool IsOpened() const override { return _filedes >= 0; }