[Xen-devel] [PATCH v2] symbols.c: Avoid warn_unused_result build failure on fgets().

[Riku Voipio <riku.voipio@xxxxxxxxxx>]

In commit:

d37d63d symbols: prefix static symbols with their source file names

An unchecked fgets was added. This causes a compile error at least
on ubuntu utopic:

symbols.c: In function 'read_symbol':
symbols.c:181:3: error: ignoring return value of 'fgets', declared with
attribute warn_unused_result [-Werror=unused-result]
   fgets(str, 500, in); /* discard rest of line */
   ^

Paper over the warning by checking the return value in the if statement.

Cc: Jan Beulich <jbeulich@xxxxxxxx>
Signed-off-by: Riku Voipio <riku.voipio@xxxxxxxxxx>
---
 xen/tools/symbols.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/xen/tools/symbols.c b/xen/tools/symbols.c
index dbf6a1a..3b8fa39 100644
--- a/xen/tools/symbols.c
+++ b/xen/tools/symbols.c
@@ -177,8 +177,8 @@ static int read_symbol(FILE *in, struct sym_entry *s)
        rc = 0;
 
  skip_tail:
-       if (input_format == fmt_sysv)
-               fgets(str, 500, in); /* discard rest of line */
+       if ((input_format == fmt_sysv) && fgets(str, 500, in) == NULL)
+               return rc; /* discard rest of line and ignore errors */
 
        return rc;
 }
-- 
2.6.2


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