1 files changed, 9 insertions, 3 deletions

diff --git a/lib/libc/gen/sysconf.c b/lib/libc/gen/sysconf.c
index b7952b107c38..2b3acfb5db74 100644
--- a/lib/libc/gen/sysconf.c
+++ b/lib/libc/gen/sysconf.c
@@ -367,11 +367,17 @@ yesno:
 		 * _POSIX_FILE_LOCKING, so we can't answer this one.
 		 */
 #endif
-#if _POSIX_THREAD_SAFE_FUNCTIONS > -1
+
+	/*
+	 * SUSv4tc1 says the following about _SC_GETGR_R_SIZE_MAX and
+	 * _SC_GETPW_R_SIZE_MAX:
+	 * Note that sysconf(_SC_GETGR_R_SIZE_MAX) may return -1 if
+	 * there is no hard limit on the size of the buffer needed to
+	 * store all the groups returned.
+	 */
 	case _SC_GETGR_R_SIZE_MAX:
 	case _SC_GETPW_R_SIZE_MAX:
-#error "somebody needs to implement this"
-#endif
+		return (-1);
 	case _SC_HOST_NAME_MAX:
 		return (MAXHOSTNAMELEN - 1); /* does not include \0 */
 	case _SC_LOGIN_NAME_MAX: