add --disable-cuserid configure argument, fixes #72

git-svn-id: https://svn.mcs.anl.gov/repos/darshan/trunk@546 3b7491f3-a168-0410-bf4b-c445ed680a29

darshan-runtime/configure

@@ -663,6 +663,7 @@ ac_user_opts='
 enable_option_checking
 with_zlib_for_mpi
 with_zlib
+enable_cuserid
 enable_ld_preload
 with_mem_align
 with_log_path_by_env
@@ -1290,6 +1291,7 @@ Optional Features:
   --disable-option-checking  ignore unrecognized --enable/--with options
   --disable-FEATURE       do not include FEATURE (same as --enable-FEATURE=no)
   --enable-FEATURE[=ARG]  include FEATURE [ARG=yes]
+  --disable-cuserid       Disables attempted use of cuserid() at run time
   --disable-ld-preload    Disables support for LD_PRELOAD library
 
 Optional Packages:
@@ -3598,6 +3600,17 @@ fi
 
 
 
+# Check whether --enable-cuserid was given.
+if test "${enable_cuserid+set}" = set; then :
+  enableval=$enable_cuserid; if test "x$enableval" = "xno" ; then
+
+$as_echo "#define DARSHAN_DISABLE_CUSERID 1" >>confdefs.h
+,
+fi
+
+fi
+
+
 # Check whether --enable-ld-preload was given.
 if test "${enable_ld_preload+set}" = set; then :
   enableval=$enable_ld_preload; if test "x$enableval" = "xno" ; then

darshan-runtime/configure.in

@@ -29,6 +29,13 @@ AC_ARG_WITH(zlib-for-mpi,,
 dnl runtime libraries require zlib
 CHECK_ZLIB
 
+AC_ARG_ENABLE(cuserid, 
+[  --disable-cuserid       Disables attempted use of cuserid() at run time], 
+[if test "x$enableval" = "xno" ; then
+    AC_DEFINE(DARSHAN_DISABLE_CUSERID, 1, Define if cuserid() should be disabled),
+fi]
+,)
+
 AC_ARG_ENABLE(ld-preload, 
 [  --disable-ld-preload    Disables support for LD_PRELOAD library], 
 [if test "x$enableval" = "xno" ; then

darshan-runtime/darshan-runtime-config.h.in

@@ -6,6 +6,9 @@
 /* Name of the environment variable that stores the jobid */
 #undef CP_JOBID
 
+/* Define if cuserid() should be disabled */
+#undef DARSHAN_DISABLE_CUSERID
+
 /* Define to 1 if you have the <inttypes.h> header file. */
 #undef HAVE_INTTYPES_H
 

darshan-runtime/lib/darshan-mpi-io.c

@@ -448,7 +448,9 @@ void darshan_shutdown(int timing_flag)
          * work in statically compiled binaries.
          */
 
+#ifndef DARSHAN_DISABLE_CUSERID
         cuserid(cuser);
+#endif
 
         /* if cuserid() didn't work, then check the environment */
         if (strcmp(cuser, "") == 0)