tools/makedep.c: check return values of "fgets","ftruncate" to prevent gcc warning messages with -Werror

[titon barua]

---
 tools/makedep.c |   12 +++++++++---
 1 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/tools/makedep.c b/tools/makedep.c
index 2571359..2e33c6e 100644
--- a/tools/makedep.c
+++ b/tools/makedep.c
@@ -196,7 +196,8 @@ static char *get_line( FILE *file )
         while (p == buffer + size - 1 && p[-1] != '\n')
         {
             buffer = xrealloc( buffer, size * 2 );
-            fgets( buffer + size - 1, size + 1, file );
+            /* in case of a read error, NULL is returned */
+            if (!fgets( buffer + size - 1, size + 1, file )) return NULL;
             p = buffer + strlen(buffer);
             size *= 2;
         }
@@ -208,7 +209,7 @@ static char *get_line( FILE *file )
             {
                 *(--p) = 0;
                 /* line ends in backslash, read continuation line */
-                fgets( p, size - (p - buffer), file );
+                if (!fgets( p, size - (p - buffer), file )) return NULL;
                 input_line++;
                 continue;
             }
@@ -880,7 +881,12 @@ static void output_dependencies(void)
         while ((buffer = get_line( file )))
         {
             if (strncmp( buffer, Separator, strlen(Separator) )) continue;
-            ftruncate( fileno(file), ftell(file) );
+            /* report error in case of failure to truncate*/
+            if (ftruncate( fileno(file), ftell(file) ) == -1)
+            {
+               perror( OutputFileName );
+               exit(1);
+            }
             fseek( file, 0L, SEEK_END );
             break;
         }
-- 
1.5.6.3