libstatgrab: fix sg_get_disk_io_stats() invocation for libstatgrab >= 0.9

In those versions, `sg_get_disk_io_stats()` need to be invoked a pointer
to size_t instead of pointer to int. Such a requirement is detected at
configure-time.

Fixes: #445

diff --git a/configure.ac b/configure.ac
index f1873de..7341050 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -4117,6 +4117,24 @@ then
           )
   )
 
+  AC_CACHE_CHECK([if sg_disk_io_stats() uses size_t],
+          [c_cv_have_libstatgrab_get_disk_io_stats_sizet],
+          AC_LINK_IFELSE([AC_LANG_PROGRAM(
+[[[
+#include <stdio.h>
+#include <statgrab.h>
+]]],
+[[[
+      sg_disk_io_stats *(*ptr) (size_t *);
+      ptr = sg_get_disk_io_stats;
+      if (ptr != NULL) return 0;
+]]]
+    )],
+    [c_cv_have_libstatgrab_get_disk_io_stats_sizet="yes"],
+    [c_cv_have_libstatgrab_get_disk_io_stats_sizet="no"]
+          )
+  )
+
   CFLAGS="$SAVE_CFLAGS"
   LDFLAGS="$SAVE_LDFLAGS"
 fi
@@ -4137,6 +4155,10 @@ then
   then
         AC_DEFINE(HAVE_LIBSTATGRAB_GET_USER_STATS_ARG, 1, [Define to 1 if sg_get_user_stats does require an argument])
   fi
+  if test "x$c_cv_have_libstatgrab_get_disk_io_stats_sizet" = "xyes"
+  then
+        AC_DEFINE(HAVE_LIBSTATGRAB_GET_DISK_IO_STATS_SIZET, 1, [Define to 1 if sg_get_disk_io_stats does require pointer to size_t as an argument])
+  fi
 fi
 # }}}
 

diff --git a/src/disk.c b/src/disk.c
index e84e835..51fbc02 100644 (file)
--- a/src/disk.c
+++ b/src/disk.c
@@ -831,7 +831,12 @@ static int disk_read (void)
 
 #elif defined(HAVE_LIBSTATGRAB)
        sg_disk_io_stats *ds;
-       int disks, counter;
+# if HAVE_LIBSTATGRAB_GET_DISK_IO_STATS_SIZET
+       size_t disks;
+# else
+       int disks;
+#endif
+       int counter;
        char name[DATA_MAX_NAME_LEN];
        
        if ((ds = sg_get_disk_io_stats(&disks)) == NULL)