path: root/user/polkit/0001-make-netgroup-support-optional.patch

From aafb9fd0e79775146186ee1d7ffef1f76cdbc1bb Mon Sep 17 00:00:00 2001
From: "A. Wilcox" <AWilcox@Wilcox-Tech.com>
Date: Wed, 11 Jul 2018 04:54:26 -0500
Subject: [PATCH] make netgroup support optional

On at least Linux/musl and Linux/uclibc, netgroup support is not
available.  PolKit fails to compile on these systems for that reason.

This change makes netgroup support conditional on the presence of the
setnetgrent(3) function which is required for the support to work.  If
that function is not available on the system, an error will be returned
to the administrator if unix-netgroup: is specified in configuration.

Fixes bug 50145.
---
 0001-make-netgroup-support-optional.patch     | 226 ++++++++++++++++++
 configure.ac                                  |   2 +-
 src/polkit/polkitidentity.c                   |  16 ++
 src/polkit/polkitunixnetgroup.c               |   3 +
 .../polkitbackendinteractiveauthority.c       |  14 +-
 .../polkitbackendjsauthority.cpp              |   2 +
 test/polkit/polkitidentitytest.c              |   9 +-
 test/polkit/polkitunixnetgrouptest.c          |   3 +
 .../test-polkitbackendjsauthority.c           |   2 +
 9 files changed, 269 insertions(+), 8 deletions(-)
 create mode 100644 0001-make-netgroup-support-optional.patch

diff --git a/0001-make-netgroup-support-optional.patch b/0001-make-netgroup-support-optional.patch
new file mode 100644
index 0000000..dedc5f7
--- /dev/null
+++ b/0001-make-netgroup-support-optional.patch
@@ -0,0 +1,226 @@
+From 73eada88dd344333cc1d1f9c5c35413fcee1dd67 Mon Sep 17 00:00:00 2001
+From: "A. Wilcox" <AWilcox@Wilcox-Tech.com>
+Date: Wed, 11 Jul 2018 04:54:26 -0500
+Subject: [PATCH] make netgroup support optional
+
+On at least Linux/musl and Linux/uclibc, netgroup support is not
+available.  PolKit fails to compile on these systems for that reason.
+
+This change makes netgroup support conditional on the presence of the
+setnetgrent(3) function which is required for the support to work.  If
+that function is not available on the system, an error will be returned
+to the administrator if unix-netgroup: is specified in configuration.
+
+Fixes bug 50145.
+---
+ configure.ac                                     |  2 +-
+ src/polkit/polkitidentity.c                      | 16 ++++++++++++++++
+ src/polkit/polkitunixnetgroup.c                  |  3 +++
+ .../polkitbackendinteractiveauthority.c          | 14 ++++++++------
+ src/polkitbackend/polkitbackendjsauthority.cpp   |  2 ++
+ test/polkit/polkitidentitytest.c                 |  9 ++++++++-
+ test/polkit/polkitunixnetgrouptest.c             |  3 +++
+ 7 files changed, 41 insertions(+), 8 deletions(-)
+
+diff --git a/configure.ac b/configure.ac
+index bfa87dd..cb86ac7 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -99,7 +99,7 @@ AC_CHECK_LIB(expat,XML_ParserCreate,[EXPAT_LIBS="-lexpat"],
+ 	     [AC_MSG_ERROR([Can't find expat library. Please install expat.])])
+ AC_SUBST(EXPAT_LIBS)
+ 
+-AC_CHECK_FUNCS(clearenv fdatasync)
++AC_CHECK_FUNCS(clearenv fdatasync setnetgrent)
+ 
+ if test "x$GCC" = "xyes"; then
+   LDFLAGS="-Wl,--as-needed $LDFLAGS"
+diff --git a/src/polkit/polkitidentity.c b/src/polkit/polkitidentity.c
+index 3aa1f7f..10e9c17 100644
+--- a/src/polkit/polkitidentity.c
++++ b/src/polkit/polkitidentity.c
+@@ -182,7 +182,15 @@ polkit_identity_from_string  (const gchar   *str,
+     }
+   else if (g_str_has_prefix (str, "unix-netgroup:"))
+     {
++#ifndef HAVE_SETNETGRENT
++      g_set_error (error,
++                   POLKIT_ERROR,
++                   POLKIT_ERROR_FAILED,
++                   "Netgroups are not available on this machine ('%s')",
++                   str);
++#else
+       identity = polkit_unix_netgroup_new (str + sizeof "unix-netgroup:" - 1);
++#endif
+     }
+ 
+   if (identity == NULL && (error != NULL && *error == NULL))
+@@ -344,6 +352,13 @@ polkit_identity_new_for_gvariant (GVariant  *variant,
+       GVariant *v;
+       const char *name;
+ 
++#ifndef HAVE_SETNETGRENT
++      g_set_error (error,
++                   POLKIT_ERROR,
++                   POLKIT_ERROR_FAILED,
++                   "Netgroups are not available on this machine");
++      goto out;
++#else
+       v = lookup_asv (details_gvariant, "name", G_VARIANT_TYPE_STRING, error);
+       if (v == NULL)
+         {
+@@ -353,6 +368,7 @@ polkit_identity_new_for_gvariant (GVariant  *variant,
+       name = g_variant_get_string (v, NULL);
+       ret = polkit_unix_netgroup_new (name);
+       g_variant_unref (v);
++#endif
+     }
+   else
+     {
+diff --git a/src/polkit/polkitunixnetgroup.c b/src/polkit/polkitunixnetgroup.c
+index 8a2b369..83f8d4a 100644
+--- a/src/polkit/polkitunixnetgroup.c
++++ b/src/polkit/polkitunixnetgroup.c
+@@ -194,6 +194,9 @@ polkit_unix_netgroup_set_name (PolkitUnixNetgroup *group,
+ PolkitIdentity *
+ polkit_unix_netgroup_new (const gchar *name)
+ {
++#ifndef HAVE_SETNETGRENT
++  g_assert_not_reached();
++#endif
+   g_return_val_if_fail (name != NULL, NULL);
+   return POLKIT_IDENTITY (g_object_new (POLKIT_TYPE_UNIX_NETGROUP,
+                                        "name", name,
+diff --git a/src/polkitbackend/polkitbackendinteractiveauthority.c b/src/polkitbackend/polkitbackendinteractiveauthority.c
+index cb6fdab..ab47a98 100644
+--- a/src/polkitbackend/polkitbackendinteractiveauthority.c
++++ b/src/polkitbackend/polkitbackendinteractiveauthority.c
+@@ -2233,25 +2233,26 @@ get_users_in_net_group (PolkitIdentity                    *group,
+   GList *ret;
+ 
+   ret = NULL;
++#ifdef HAVE_SETNETGRENT
+   name = polkit_unix_netgroup_get_name (POLKIT_UNIX_NETGROUP (group));
+ 
+-#ifdef HAVE_SETNETGRENT_RETURN
++# ifdef HAVE_SETNETGRENT_RETURN
+   if (setnetgrent (name) == 0)
+     {
+       g_warning ("Error looking up net group with name %s: %s", name, g_strerror (errno));
+       goto out;
+     }
+-#else
++# else
+   setnetgrent (name);
+-#endif
++# endif /* HAVE_SETNETGRENT_RETURN */
+ 
+   for (;;)
+     {
+-#if defined(HAVE_NETBSD) || defined(HAVE_OPENBSD)
++# if defined(HAVE_NETBSD) || defined(HAVE_OPENBSD)
+       const char *hostname, *username, *domainname;
+-#else
++# else
+       char *hostname, *username, *domainname;
+-#endif
++# endif /* defined(HAVE_NETBSD) || defined(HAVE_OPENBSD) */
+       PolkitIdentity *user;
+       GError *error = NULL;
+ 
+@@ -2282,6 +2283,7 @@ get_users_in_net_group (PolkitIdentity                    *group,
+ 
+  out:
+   endnetgrent ();
++#endif /* HAVE_SETNETGRENT */
+   return ret;
+ }
+ 
+diff --git a/src/polkitbackend/polkitbackendjsauthority.cpp b/src/polkitbackend/polkitbackendjsauthority.cpp
+index 517f3c6..45b0378 100644
+--- a/src/polkitbackend/polkitbackendjsauthority.cpp
++++ b/src/polkitbackend/polkitbackendjsauthority.cpp
+@@ -1499,6 +1499,7 @@ js_polkit_user_is_in_netgroup (JSContext  *cx,
+ 
+   JS::CallArgs args = JS::CallArgsFromVp (argc, vp);
+ 
++#ifdef HAVE_SETNETGRENT
+   user = JS_EncodeString (cx, args[0].toString());
+   netgroup = JS_EncodeString (cx, args[1].toString());
+ 
+@@ -1512,6 +1513,7 @@ js_polkit_user_is_in_netgroup (JSContext  *cx,
+ 
+   JS_free (cx, netgroup);
+   JS_free (cx, user);
++#endif
+ 
+   ret = true;
+ 
+diff --git a/test/polkit/polkitidentitytest.c b/test/polkit/polkitidentitytest.c
+index e91967b..e829aaa 100644
+--- a/test/polkit/polkitidentitytest.c
++++ b/test/polkit/polkitidentitytest.c
+@@ -19,6 +19,7 @@
+  * Author: Nikki VonHollen <vonhollen@google.com>
+  */
+ 
++#include "config.h"
+ #include "glib.h"
+ #include <polkit/polkit.h>
+ #include <polkit/polkitprivate.h>
+@@ -145,11 +146,15 @@ struct ComparisonTestData comparison_test_data [] = {
+   {"unix-group:root", "unix-group:jane", FALSE},
+   {"unix-group:jane", "unix-group:jane", TRUE},
+ 
++#ifdef HAVE_SETNETGRENT
+   {"unix-netgroup:foo", "unix-netgroup:foo", TRUE},
+   {"unix-netgroup:foo", "unix-netgroup:bar", FALSE},
++#endif
+ 
+   {"unix-user:root", "unix-group:root", FALSE},
++#ifdef HAVE_SETNETGRENT
+   {"unix-user:jane", "unix-netgroup:foo", FALSE},
++#endif
+ 
+   {NULL},
+ };
+@@ -181,11 +186,13 @@ main (int argc, char *argv[])
+   g_test_add_data_func ("/PolkitIdentity/group_string_2", "unix-group:jane", test_string);
+   g_test_add_data_func ("/PolkitIdentity/group_string_3", "unix-group:users", test_string);
+ 
++#ifdef HAVE_SETNETGRENT
+   g_test_add_data_func ("/PolkitIdentity/netgroup_string", "unix-netgroup:foo", test_string);
++  g_test_add_data_func ("/PolkitIdentity/netgroup_gvariant", "unix-netgroup:foo", test_gvariant);
++#endif
+ 
+   g_test_add_data_func ("/PolkitIdentity/user_gvariant", "unix-user:root", test_gvariant);
+   g_test_add_data_func ("/PolkitIdentity/group_gvariant", "unix-group:root", test_gvariant);
+-  g_test_add_data_func ("/PolkitIdentity/netgroup_gvariant", "unix-netgroup:foo", test_gvariant);
+ 
+   add_comparison_tests ();
+ 
+diff --git a/test/polkit/polkitunixnetgrouptest.c b/test/polkit/polkitunixnetgrouptest.c
+index 3701ba1..e3352eb 100644
+--- a/test/polkit/polkitunixnetgrouptest.c
++++ b/test/polkit/polkitunixnetgrouptest.c
+@@ -19,6 +19,7 @@
+  * Author: Nikki VonHollen <vonhollen@google.com>
+  */
+ 
++#include "config.h"
+ #include "glib.h"
+ #include <polkit/polkit.h>
+ #include <string.h>
+@@ -69,7 +70,9 @@ int
+ main (int argc, char *argv[])
+ {
+   g_test_init (&argc, &argv, NULL);
++#ifdef HAVE_SETNETGRENT
+   g_test_add_func ("/PolkitUnixNetgroup/new", test_new);
+   g_test_add_func ("/PolkitUnixNetgroup/set_name", test_set_name);
++#endif
+   return g_test_run ();
+ }
+-- 
+2.17.1
+
diff --git a/configure.ac b/configure.ac
index bfa87dd..cb86ac7 100644
--- a/configure.ac
+++ b/configure.ac
@@ -99,7 +99,7 @@ AC_CHECK_LIB(expat,XML_ParserCreate,[EXPAT_LIBS="-lexpat"],
 	     [AC_MSG_ERROR([Can't find expat library. Please install expat.])])
 AC_SUBST(EXPAT_LIBS)
 
-AC_CHECK_FUNCS(clearenv fdatasync)
+AC_CHECK_FUNCS(clearenv fdatasync setnetgrent)
 
 if test "x$GCC" = "xyes"; then
   LDFLAGS="-Wl,--as-needed $LDFLAGS"
diff --git a/src/polkit/polkitidentity.c b/src/polkit/polkitidentity.c
index 3aa1f7f..10e9c17 100644
--- a/src/polkit/polkitidentity.c
+++ b/src/polkit/polkitidentity.c
@@ -182,7 +182,15 @@ polkit_identity_from_string  (const gchar   *str,
     }
   else if (g_str_has_prefix (str, "unix-netgroup:"))
     {
+#ifndef HAVE_SETNETGRENT
+      g_set_error (error,
+                   POLKIT_ERROR,
+                   POLKIT_ERROR_FAILED,
+                   "Netgroups are not available on this machine ('%s')",
+                   str);
+#else
       identity = polkit_unix_netgroup_new (str + sizeof "unix-netgroup:" - 1);
+#endif
     }
 
   if (identity == NULL && (error != NULL && *error == NULL))
@@ -344,6 +352,13 @@ polkit_identity_new_for_gvariant (GVariant  *variant,
       GVariant *v;
       const char *name;
 
+#ifndef HAVE_SETNETGRENT
+      g_set_error (error,
+                   POLKIT_ERROR,
+                   POLKIT_ERROR_FAILED,
+                   "Netgroups are not available on this machine");
+      goto out;
+#else
       v = lookup_asv (details_gvariant, "name", G_VARIANT_TYPE_STRING, error);
       if (v == NULL)
         {
@@ -353,6 +368,7 @@ polkit_identity_new_for_gvariant (GVariant  *variant,
       name = g_variant_get_string (v, NULL);
       ret = polkit_unix_netgroup_new (name);
       g_variant_unref (v);
+#endif
     }
   else
     {
diff --git a/src/polkit/polkitunixnetgroup.c b/src/polkit/polkitunixnetgroup.c
index 8a2b369..83f8d4a 100644
--- a/src/polkit/polkitunixnetgroup.c
+++ b/src/polkit/polkitunixnetgroup.c
@@ -194,6 +194,9 @@ polkit_unix_netgroup_set_name (PolkitUnixNetgroup *group,
 PolkitIdentity *
 polkit_unix_netgroup_new (const gchar *name)
 {
+#ifndef HAVE_SETNETGRENT
+  g_assert_not_reached();
+#endif
   g_return_val_if_fail (name != NULL, NULL);
   return POLKIT_IDENTITY (g_object_new (POLKIT_TYPE_UNIX_NETGROUP,
                                        "name", name,
diff --git a/src/polkitbackend/polkitbackendinteractiveauthority.c b/src/polkitbackend/polkitbackendinteractiveauthority.c
index cb6fdab..ab47a98 100644
--- a/src/polkitbackend/polkitbackendinteractiveauthority.c
+++ b/src/polkitbackend/polkitbackendinteractiveauthority.c
@@ -2233,25 +2233,26 @@ get_users_in_net_group (PolkitIdentity                    *group,
   GList *ret;
 
   ret = NULL;
+#ifdef HAVE_SETNETGRENT
   name = polkit_unix_netgroup_get_name (POLKIT_UNIX_NETGROUP (group));
 
-#ifdef HAVE_SETNETGRENT_RETURN
+# ifdef HAVE_SETNETGRENT_RETURN
   if (setnetgrent (name) == 0)
     {
       g_warning ("Error looking up net group with name %s: %s", name, g_strerror (errno));
       goto out;
     }
-#else
+# else
   setnetgrent (name);
-#endif
+# endif /* HAVE_SETNETGRENT_RETURN */
 
   for (;;)
     {
-#if defined(HAVE_NETBSD) || defined(HAVE_OPENBSD)
+# if defined(HAVE_NETBSD) || defined(HAVE_OPENBSD)
       const char *hostname, *username, *domainname;
-#else
+# else
       char *hostname, *username, *domainname;
-#endif
+# endif /* defined(HAVE_NETBSD) || defined(HAVE_OPENBSD) */
       PolkitIdentity *user;
       GError *error = NULL;
 
@@ -2282,6 +2283,7 @@ get_users_in_net_group (PolkitIdentity                    *group,
 
  out:
   endnetgrent ();
+#endif /* HAVE_SETNETGRENT */
   return ret;
 }
 
diff --git a/src/polkitbackend/polkitbackendjsauthority.cpp b/src/polkitbackend/polkitbackendjsauthority.cpp
index 517f3c6..45b0378 100644
--- a/src/polkitbackend/polkitbackendjsauthority.cpp
+++ b/src/polkitbackend/polkitbackendjsauthority.cpp
@@ -1499,6 +1499,7 @@ js_polkit_user_is_in_netgroup (JSContext  *cx,
 
   JS::CallArgs args = JS::CallArgsFromVp (argc, vp);
 
+#ifdef HAVE_SETNETGRENT
   user = JS_EncodeString (cx, args[0].toString());
   netgroup = JS_EncodeString (cx, args[1].toString());
 
@@ -1512,6 +1513,7 @@ js_polkit_user_is_in_netgroup (JSContext  *cx,
 
   JS_free (cx, netgroup);
   JS_free (cx, user);
+#endif
 
   ret = true;
 
diff --git a/test/polkit/polkitidentitytest.c b/test/polkit/polkitidentitytest.c
index e91967b..e829aaa 100644
--- a/test/polkit/polkitidentitytest.c
+++ b/test/polkit/polkitidentitytest.c
@@ -19,6 +19,7 @@
  * Author: Nikki VonHollen <vonhollen@google.com>
  */
 
+#include "config.h"
 #include "glib.h"
 #include <polkit/polkit.h>
 #include <polkit/polkitprivate.h>
@@ -145,11 +146,15 @@ struct ComparisonTestData comparison_test_data [] = {
   {"unix-group:root", "unix-group:jane", FALSE},
   {"unix-group:jane", "unix-group:jane", TRUE},
 
+#ifdef HAVE_SETNETGRENT
   {"unix-netgroup:foo", "unix-netgroup:foo", TRUE},
   {"unix-netgroup:foo", "unix-netgroup:bar", FALSE},
+#endif
 
   {"unix-user:root", "unix-group:root", FALSE},
+#ifdef HAVE_SETNETGRENT
   {"unix-user:jane", "unix-netgroup:foo", FALSE},
+#endif
 
   {NULL},
 };
@@ -181,11 +186,13 @@ main (int argc, char *argv[])
   g_test_add_data_func ("/PolkitIdentity/group_string_2", "unix-group:jane", test_string);
   g_test_add_data_func ("/PolkitIdentity/group_string_3", "unix-group:users", test_string);
 
+#ifdef HAVE_SETNETGRENT
   g_test_add_data_func ("/PolkitIdentity/netgroup_string", "unix-netgroup:foo", test_string);
+  g_test_add_data_func ("/PolkitIdentity/netgroup_gvariant", "unix-netgroup:foo", test_gvariant);
+#endif
 
   g_test_add_data_func ("/PolkitIdentity/user_gvariant", "unix-user:root", test_gvariant);
   g_test_add_data_func ("/PolkitIdentity/group_gvariant", "unix-group:root", test_gvariant);
-  g_test_add_data_func ("/PolkitIdentity/netgroup_gvariant", "unix-netgroup:foo", test_gvariant);
 
   add_comparison_tests ();
 
diff --git a/test/polkit/polkitunixnetgrouptest.c b/test/polkit/polkitunixnetgrouptest.c
index 3701ba1..e3352eb 100644
--- a/test/polkit/polkitunixnetgrouptest.c
+++ b/test/polkit/polkitunixnetgrouptest.c
@@ -19,6 +19,7 @@
  * Author: Nikki VonHollen <vonhollen@google.com>
  */
 
+#include "config.h"
 #include "glib.h"
 #include <polkit/polkit.h>
 #include <string.h>
@@ -69,7 +70,9 @@ int
 main (int argc, char *argv[])
 {
   g_test_init (&argc, &argv, NULL);
+#ifdef HAVE_SETNETGRENT
   g_test_add_func ("/PolkitUnixNetgroup/new", test_new);
   g_test_add_func ("/PolkitUnixNetgroup/set_name", test_set_name);
+#endif
   return g_test_run ();
 }
diff --git a/test/polkitbackend/test-polkitbackendjsauthority.c b/test/polkitbackend/test-polkitbackendjsauthority.c
index b484a26..01e4907 100644
--- a/test/polkitbackend/test-polkitbackendjsauthority.c
+++ b/test/polkitbackend/test-polkitbackendjsauthority.c
@@ -137,12 +137,14 @@ test_get_admin_identities (void)
         "unix-group:users"
       }
     },
+#ifdef HAVE_SETNETGRENT
     {
       "net.company.action3",
       {
         "unix-netgroup:foo"
       }
     },
+#endif
   };
   guint n;
 
-- 
2.17.1