Grant Nathan his wish - add an --disable-getpwuid to the configure options and protect all users of that code so it disappears if disabled.

cmr=v1.7.5:reviewer=hjelmn:subject=disable getpwuid if requested

This commit was SVN r30413.

config/opal_configure_options.m4

@@ -464,4 +464,19 @@ AC_ARG_WITH([libltdl],
 AC_DEFINE_UNQUOTED([OPAL_ENABLE_CRDEBUG], [0],
     [Whether we want checkpoint/restart enabled debugging functionality or not])
 
+# some systems don't want/like getpwuid
+AC_MSG_CHECKING([if want getpwuid support])
+AC_ARG_ENABLE([getpwuid],
+    [AC_HELP_STRING([--disable-getpwuid],
+        [Disable getpwuid support (default: enabled)])])
+if test "$enable_getpwuid" = "no"; then
+    AC_MSG_RESULT([no])
+    opal_want_getpwuid=0
+else
+    AC_MSG_RESULT([yes])
+    opal_want_getpwuid=1
+fi
+AC_DEFINE_UNQUOTED([OPAL_ENABLE_GETPWUID], [$opal_want_getpwuid],
+                   [Disable getpwuid support (default: enabled)])
+    
 ])dnl

orte/mca/plm/rsh/plm_rsh_module.c

@@ -1492,12 +1492,16 @@ static int setup_shell(orte_plm_rsh_shell_t *rshell,
                        char *nodename, int *argc, char ***argv)
 {
     orte_plm_rsh_shell_t remote_shell, local_shell;
-    struct passwd *p;
     char *param;
     int rc;
 
     /* What is our local shell? */
     local_shell = ORTE_PLM_RSH_SHELL_UNKNOWN;
+
+#if OPAL_ENABLE_GETPWUID
+    {
+        struct passwd *p;
+
         p = getpwuid(getuid());
         if( NULL == p ) {
             /* This user is unknown to the system. Therefore, there is no reason we
@@ -1508,6 +1512,8 @@ static int setup_shell(orte_plm_rsh_shell_t *rshell,
         }
         param = p->pw_shell;
         local_shell = find_shell(p->pw_shell);
+    }
+#endif
 
     /* If we didn't find it in getpwuid(), try looking at the $SHELL
        environment variable (see https://svn.open-mpi.org/trac/ompi/ticket/1060)

orte/tools/orte-clean/orte-clean.c

@@ -62,6 +62,7 @@
 #include "opal/util/show_help.h"
 
 #include "orte/util/proc_info.h"
+#include "orte/util/show_help.h"
 
 #include "opal/runtime/opal.h"
 #if OPAL_ENABLE_FT_CR == 1
@@ -268,7 +269,6 @@ void kill_procs(void) {
     char *inputline;
     char *this_user;
     int uid;
-    struct passwd *pwdent;
     char *separator = " \t";  /* output can be delimited by space or tab */
     
     /*
@@ -303,18 +303,31 @@ void kill_procs(void) {
 
     /* get the name of the user */
     uid = getuid();
+#if OPAL_ENABLE_GETPWUID
+    {
+        struct passwd *pwdent;
+
 #ifdef HAVE_GETPWUID
         pwdent = getpwuid(uid);
+        if (NULL == pwdent) {
+            /* this indicates a problem with the passwd system,
+             * so pretty-print a message just for info
+             */
+            orte_show_help("help-orte-runtime.txt",
+                           "orte:session:dir:nopwname", true);
+        }
 #else
         pwdent = NULL;
 #endif
         if (NULL != pwdent) {
             this_user = strdup(pwdent->pw_name);
         } else {
-        if (0 > asprintf(&this_user, "%d", uid)) {
-            return;
+            asprintf(&this_user, "%d", uid);
         }
     }
+#else
+    asprintf(&this_user, "%d", uid);
+#endif
     
     /*
      * There is a race condition here.  The problem is that we are looking

orte/util/session_dir.c

@@ -132,15 +132,25 @@ orte_session_dir_get_name(char **fulldirpath,
     int exit_status = ORTE_SUCCESS;
     size_t len;
     int uid;
-    struct passwd *pwdent;
     
     /* Ensure that system info is set */
     orte_proc_info();
 
     /* get the name of the user */
     uid = getuid();
+#if OPAL_ENABLE_GETPWUID
+    {
+        struct passwd *pwdent;
+
 #ifdef HAVE_GETPWUID
         pwdent = getpwuid(uid);
+        if (NULL == pwdent) {
+            /* this indicates a problem with the passwd system,
+             * so pretty-print a message just for info
+             */
+            orte_show_help("help-orte-runtime.txt",
+                           "orte:session:dir:nopwname", true);
+        }
 #else
         pwdent = NULL;
 #endif
@@ -149,6 +159,11 @@ orte_session_dir_get_name(char **fulldirpath,
         } else {
             asprintf(&user, "%d", uid);
         }
+    }
+#else
+    asprintf(&user, "%d", uid);
+#endif
+
     
     /*
      * set the 'hostname'