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-rw-r--r--src/system.h18
1 files changed, 18 insertions, 0 deletions
diff --git a/src/system.h b/src/system.h
index ec64cd0d8..18ac0cc9f 100644
--- a/src/system.h
+++ b/src/system.h
@@ -213,6 +213,24 @@ struct passwd *getpwuid ();
struct group *getgrgid ();
#endif
+/* Interix has replacements for getgr{gid,nam,ent}, that don't
+ query the domain controller for group members when not required.
+ This speeds up the calls tremendously (<1 ms vs. >3 s). */
+/* To protect any system that could provide _nomembers functions
+ other than interix, check for HAVE_SETGROUPS, as interix is
+ one of the very few (the only?) platform that lacks it */
+#if ! HAVE_SETGROUPS
+# if HAVE_GETGRGID_NOMEMBERS
+# define getgrgid(gid) getgrgid_nomembers(gid)
+# endif
+# if HAVE_GETGRNAM_NOMEMBERS
+# define getgrnam(nam) getgrnam_nomembers(nam)
+# endif
+# if HAVE_GETGRENT_NOMEMBERS
+# define getgrent() getgrent_nomembers()
+# endif
+#endif
+
#if !HAVE_DECL_GETUID
uid_t getuid ();
#endif