tests: replace fread by xfread

With fortification enabled, fread calls return result needs to be checked,
has it gets the __wur macro enabled.
Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>

stdio-common/bug12.c

@@ -1,6 +1,8 @@
 #include <stdio.h>
 #include <string.h>
 
+#include <support/xstdio.h>
+
 char x[4096], z[4096], b[21], m[4096 * 4];
 
 int
@@ -20,24 +22,24 @@ main (void)
     }
   rewind (f);
 
-  fread (m, 4096 * 4 - 10, 1, f);
-  fread (b, 20, 1, f);
+  xfread (m, 4096 * 4 - 10, 1, f);
+  xfread (b, 20, 1, f);
   printf ("got %s (should be %s)\n", b, "zzzzzzzzzzxxxxxxxxxx");
   if (strcmp (b, "zzzzzzzzzzxxxxxxxxxx"))
     failed = 1;
 
   fseek (f, -40, SEEK_CUR);
-  fread (b, 20, 1, f);
+  xfread (b, 20, 1, f);
   printf ("got %s (should be %s)\n", b, "zzzzzzzzzzzzzzzzzzzz");
   if (strcmp (b, "zzzzzzzzzzzzzzzzzzzz"))
     failed = 1;
 
-  fread (b, 20, 1, f);
+  xfread (b, 20, 1, f);
   printf ("got %s (should be %s)\n", b, "zzzzzzzzzzxxxxxxxxxx");
   if (strcmp (b, "zzzzzzzzzzxxxxxxxxxx"))
     failed = 1;
 
-  fread (b, 20, 1, f);
+  xfread (b, 20, 1, f);
   printf ("got %s (should be %s)\n", b, "xxxxxxxxxxxxxxxxxxxx");
   if (strcmp (b, "xxxxxxxxxxxxxxxxxxxx"))
     failed = 1;

stdio-common/bug3.c

@@ -1,6 +1,8 @@
 #include <stdio.h>
 #include <string.h>
 
+#include <support/xstdio.h>
+
 int
 main (void)
 {
@@ -32,7 +34,7 @@ main (void)
 	      char buf[25];
 
 	      buf[0] = j;
-	      fread (buf + 1, 1, 23, f);
+	      xfread (buf + 1, 1, 23, f);
 	      buf[24] = '\0';
 	      if (strcmp (buf, "Where does this text go?") != 0)
 		{

stdio-common/bug4.c

@@ -2,6 +2,8 @@
 #include <unistd.h>
 #include <string.h>
 
+#include <support/xstdio.h>
+
 int stdio_block_read = 1, stdio_block_write = 1;
 
 int
@@ -30,7 +32,7 @@ main (int argc, char *argv[])
   fseek (f, 8180L, 0);
   fwrite ("Where does this text come from?", 1, 31, f);
   fseek (f, 8180L, 0);
-  fread (buffer, 1, 31, f);
+  xfread (buffer, 1, 31, f);
   fwrite (buffer, 1, 31, stdout);
   fclose (f);
   remove (filename);

stdio-common/tst-cookie.c

@@ -5,6 +5,8 @@
 
 #include <stdio.h>
 
+#include <support/xstdio.h>
+
 
 #define THE_COOKIE ((void *) 0xdeadbeeful)
 
@@ -77,7 +79,8 @@ do_test (void)
 
   f = fopencookie (THE_COOKIE, "r+", fcts);
 
-  fread (buf, 1, 1, f);
+  xfread (buf, 1, 1, f);
+
   fwrite (buf, 1, 1, f);
   fseek (f, 0, SEEK_CUR);
   fclose (f);

stdio-common/tst-fmemopen3.c

@@ -21,6 +21,8 @@
 #include <string.h>
 #include <sys/types.h>
 
+#include <support/xstdio.h>
+
 static void
 print_buffer (const char *s, size_t n)
 {
@@ -153,7 +155,7 @@ do_test_read_seek_neg (const char *mode, const char *expected)
 
   FILE *fp = fmemopen (buf, sizeof (buf), mode);
   fseek (fp, offset, SEEK_END);
-  fread (tmp, tmps, 1, fp);
+  xfread (tmp, tmps, 1, fp);
 
   if (memcmp (tmp, expected, tmps) != 0)
     {