Fix error logging for dynamically-loaded modules. Bug 2507

[users/jgh/exim.git] / src / src / exim.c

diff --git a/src/src/exim.c b/src/src/exim.c
index 3fda22232b6d2ba6e93c36cca4b4d53bd7ef92f3..92f5623d23af304dbd3ee9c4de7c59fc7f7a1c70 100644 (file)
--- a/src/src/exim.c
+++ b/src/src/exim.c
@@ -1265,9 +1265,9 @@ void *dlhandle;
 void *dlhandle_curses = dlopen("libcurses." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_LAZY);
 
 dlhandle = dlopen("libreadline." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_NOW);
-if (dlhandle_curses != NULL) dlclose(dlhandle_curses);
+if (dlhandle_curses) dlclose(dlhandle_curses);
 
-if (dlhandle != NULL)
+if (dlhandle)
   {
   /* Checked manual pages; at least in GNU Readline 6.1, the prototypes are:
    *   char * readline (const char *prompt);
@@ -1277,9 +1277,7 @@ if (dlhandle != NULL)
   *fn_addhist_ptr = (void(*)(const char*))dlsym(dlhandle, "add_history");
   }
 else
-  {
   DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
-  }
 
 return dlhandle;
 }
@@ -3641,15 +3639,15 @@ an error return. The following code should cope with both types of system.
  in the call to exim_setugid().
 
 However, if this process isn't running as root, setgroups() can't be used
-since you have to be root to run it, even if throwing away groups. Not being
-root here happens only in some unusual configurations. We just ignore the
-error. */
+since you have to be root to run it, even if throwing away groups.
+Except, sigh, for Hurd - where you can.
+Not being root here happens only in some unusual configurations. */
 
-if (
+if (  !unprivileged
 #ifndef OS_SETGROUPS_ZERO_DROPS_ALL
-   setgroups(0, NULL) != 0 &&
+   && setgroups(0, NULL) != 0
 #endif
-   setgroups(1, group_list) != 0 && !unprivileged)
+   && setgroups(1, group_list) != 0)
   exim_fail("exim: setgroups() failed: %s\n", strerror(errno));
 
 /* If the configuration file name has been altered by an argument on the