Added actual syslog system call test.

git-svn-id: svn://svn.valgrind.org/valgrind/trunk@7923

memcheck/tests/linux-syslog-syscall.c

@@ -0,0 +1,23 @@
+/** Test program for the syslog() system call.
+ *  From the syslog(2) man page:
+ *    If you need the libc function syslog()  (which  talks  to  syslogd(8)),
+ *    then look at syslog(3).  The system call of this name is about control‐
+ *    ling the kernel printk()  buffer,  and  the  glibc  version  is  called
+ *    klogctl().
+ */
+
+#include "../../config.h"
+#include <stdio.h>
+#if defined(HAVE_SYS_KLOG_H)
+#include <sys/klog.h>
+#endif
+
+int main(int argc, char** argv)
+{
+  int number_of_unread_characters;
+#if defined HAVE_KLOGCTL
+  number_of_unread_characters = klogctl(9, 0, 0);
+#endif
+  fprintf(stderr, "Done.\n");
+  return 0 * number_of_unread_characters;
+}