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etc_org/default/nss

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+# /etc/default/nss
+# This file can theoretically contain a bunch of customization variables
+# for Name Service Switch in the GNU C library.  For now there are only
+# four variables:
+#
+# NETID_AUTHORITATIVE
+#   If set to TRUE, the initgroups() function will accept the information
+#   from the netid.byname NIS map as authoritative.  This can speed up the
+#   function significantly if the group.byname map is large.  The content
+#   of the netid.byname map is used AS IS.  The system administrator has
+#   to make sure it is correctly generated.
+#NETID_AUTHORITATIVE=TRUE
+#
+# SERVICES_AUTHORITATIVE
+#   If set to TRUE, the getservbyname{,_r}() function will assume
+#   services.byservicename NIS map exists and is authoritative, particularly
+#   that it contains both keys with /proto and without /proto for both
+#   primary service names and service aliases.  The system administrator
+#   has to make sure it is correctly generated.
+#SERVICES_AUTHORITATIVE=TRUE
+#
+# SETENT_BATCH_READ
+#  If set to TRUE, various setXXent() functions will read the entire
+#  database at once and then hand out the requests one by one from
+#  memory with every getXXent() call.  Otherwise each getXXent() call
+#  might result into a network communication with the server to get
+#  the next entry.
+#SETENT_BATCH_READ=TRUE
+#
+# ADJUNCT_AS_SHADOW
+#  If set to TRUE, the passwd routines in the NIS NSS module will not
+#  use the passwd.adjunct.byname tables to fill in the password data
+#  in the passwd structure.  This is a security problem if the NIS
+#  server cannot be trusted to send the passwd.adjuct table only to
+#  privileged clients.  Instead the passwd.adjunct.byname table is
+#  used to synthesize the shadow.byname table if it does not exist.
+ADJUNCT_AS_SHADOW=TRUE