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[bug #19416] _FORTIFY_SOURCE warn_unused_result warnings

From: Robert Connolly
Subject: [bug #19416] _FORTIFY_SOURCE warn_unused_result warnings
Date: Mon, 26 Mar 2007 01:36:43 +0000
User-agent: Mozilla/5.0 (compatible; Konqueror/3.5; Linux) KHTML/3.5.4 (like Gecko)


                 Summary: _FORTIFY_SOURCE warn_unused_result warnings
                 Project: findutils
            Submitted by: ashes
            Submitted on: Monday 03/26/2007 at 01:36
                Category: None
                Severity: 3 - Normal
              Item Group: None
                  Status: None
                 Privacy: Public
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 4.2.30
           Fixed Release: None



Hello. When _FORTIFY_SOURCE=2 is defined we get a few warnings about unused
return values:

pred.c:625: warning: ignoring return value of 'fwrite', declared with
attribute warn_unused_result
pred.c:629: ... ditto ...
frcode.c:221: ... ditto ...
code.c:188: ... 'fgets' ...
code.c:189: ... 'fwrite' ...

Is there something we can do about this to make -Werror happy? Something in
the neighbourhood of:

- fwrite (segment->text, 1, segment->text_len, fp);
+ size_t written = 0;
+ written += fwrite (segment->text, 1, segment->text_len, fp);
+  if ( written < 0 )
+  {
+   exit(EXIT_FAILURE);
+  }


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