*: make sure config.h or zebra.h is first

`config.h` has all the defines from autoconf, which may include things
that switch behavior of other included headers (e.g. _GNU_SOURCE
enabling prototypes for additional functions.)

So, the first include in any `.c` file must be either `config.h` (with
the appropriate guard) or `zebra.h` (which includes `config.h` first
thing.)

Signed-off-by: David Lamparter <equinox@opensourcerouting.org>

bgpd/bgp_conditional_adv.c

@@ -18,6 +18,8 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+#include <zebra.h>
+
 #include "bgpd/bgp_conditional_adv.h"
 #include "bgpd/bgp_vty.h"
 

bgpd/bgp_nb.c

@@ -18,6 +18,8 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+#include <zebra.h>
+
 #include "northbound.h"
 #include "libfrr.h"
 #include "bgpd/bgp_nb.h"

bgpd/bgp_nb_config.c

@@ -18,6 +18,8 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+#include <zebra.h>
+
 #include "northbound.h"
 #include "libfrr.h"
 #include "log.h"

bgpd/bgp_routemap_nb.c

@@ -18,6 +18,8 @@
  */
 
 
+#include <zebra.h>
+
 #include "lib/command.h"
 #include "lib/log.h"
 #include "lib/northbound.h"

bgpd/bgp_routemap_nb_config.c

@@ -17,6 +17,8 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+#include <zebra.h>
+
 #include "lib/command.h"
 #include "lib/log.h"
 #include "lib/northbound.h"

bgpd/bgp_trace.c

@@ -1,4 +1,6 @@
 #define TRACEPOINT_CREATE_PROBES
 #define TRACEPOINT_DEFINE
 
+#include <zebra.h>
+
 #include "bgp_trace.h"

eigrpd/eigrp_metric.c

@@ -21,6 +21,8 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+#include <zebra.h>
+
 #include "eigrpd/eigrp_structs.h"
 #include "eigrpd/eigrpd.h"
 #include "eigrpd/eigrp_types.h"

lib/libfrr_trace.c

@@ -1,4 +1,6 @@
 #define TRACEPOINT_CREATE_PROBES
 #define TRACEPOINT_DEFINE
 
+#include <zebra.h>
+
 #include "libfrr_trace.h"

lib/link_state.c

@@ -22,6 +22,8 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+#include <zebra.h>
+
 #include "if.h"
 #include "linklist.h"
 #include "log.h"

lib/routing_nb.c

@@ -16,6 +16,8 @@
  * with this program; see the file COPYING; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  */
+#include <zebra.h>
+
 #include "northbound.h"
 #include "libfrr.h"
 #include "routing_nb.h"

lib/routing_nb_config.c

@@ -17,6 +17,8 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+#include <zebra.h>
+
 #include "northbound.h"
 #include "libfrr.h"
 #include "vrf.h"

ospf6d/ospf6_routemap_nb.c

@@ -17,6 +17,8 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+#include <zebra.h>
+
 #include "lib/northbound.h"
 #include "lib/routemap.h"
 #include "ospf6_routemap_nb.h"

ospf6d/ospf6_routemap_nb_config.c

@@ -17,6 +17,8 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+#include <zebra.h>
+
 #include "lib/command.h"
 #include "lib/log.h"
 #include "lib/northbound.h"

ospfd/ospf_routemap_nb.c

@@ -17,6 +17,8 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+#include <zebra.h>
+
 #include "lib/northbound.h"
 #include "lib/routemap.h"
 #include "ospf_routemap_nb.h"

ospfd/ospf_routemap_nb_config.c

@@ -17,6 +17,8 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+#include <zebra.h>
+
 #include "lib/command.h"
 #include "lib/log.h"
 #include "lib/northbound.h"

pathd/path_cli.c

@@ -16,6 +16,8 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+#include <zebra.h>
+
 #include <float.h>
 #include <math.h>
 #include <zebra.h>

pathd/path_debug.c

@@ -16,6 +16,8 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+#include <zebra.h>
+
 #include <string.h>
 #include <stdbool.h>
 #include <time.h>

pathd/path_pcep_config.c

@@ -16,6 +16,8 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+#include <zebra.h>
+
 #include <northbound.h>
 #include <yang.h>
 #include <printfrr.h>

pathd/path_pcep_debug.c

@@ -16,6 +16,8 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+#include <zebra.h>
+
 #include <string.h>
 #include <stdbool.h>
 #include <time.h>

pathd/path_zebra.c

@@ -16,6 +16,8 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+#include <zebra.h>
+
 #include "thread.h"
 #include "log.h"
 #include "lib_errors.h"

pceplib/pcep_msg_messages.c

@@ -25,6 +25,10 @@
  * This is the implementation of a High Level PCEP message API.
  */
 
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <string.h>
 #include <arpa/inet.h>
 #include <stdarg.h>

pceplib/pcep_msg_messages_encoding.c

@@ -25,6 +25,10 @@
  * Encoding and decoding for PCEP messages.
  */
 
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>

pceplib/pcep_msg_object_error_types.c

@@ -19,6 +19,10 @@
  * Author : Brady Johnson <brady@voltanet.io>
  */
 
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <stdlib.h>
 
 #include "pcep_msg_object_error_types.h"

pceplib/pcep_msg_objects.c

@@ -25,6 +25,10 @@
  * This is the implementation of a High Level PCEP message object API.
  */
 
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <string.h>
 #include <arpa/inet.h>
 #include <stdarg.h>

pceplib/pcep_msg_objects_encoding.c

@@ -25,6 +25,10 @@
  * Encoding and decoding for PCEP Objects.
  */
 
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <stdlib.h>
 #include <string.h>
 

pceplib/pcep_msg_tlvs.c

@@ -25,6 +25,10 @@
  * This is the implementation of a High Level PCEP message object TLV API.
  */
 
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <stdbool.h>
 #include <stdint.h>
 #include <string.h>

pceplib/pcep_msg_tools.c

@@ -21,6 +21,10 @@
  */
 
 
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <errno.h>
 #include <stdio.h>
 #include <string.h>

pceplib/pcep_session_logic.c

@@ -21,6 +21,10 @@
  */
 
 
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <errno.h>
 #include <limits.h>
 #include <pthread.h>

pceplib/pcep_session_logic_counters.c

@@ -25,6 +25,10 @@
  * PCEP session logic counters configuration.
  */
 
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <stdio.h>
 #include <time.h>
 

pceplib/pcep_session_logic_loop.c

@@ -20,6 +20,10 @@
  *
  */
 
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <pthread.h>
 #include <stdbool.h>
 #include <stdio.h>

pceplib/pcep_session_logic_states.c

@@ -20,6 +20,10 @@
  *
  */
 
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <pthread.h>
 #include <stdbool.h>
 #include <stdio.h>

pceplib/pcep_socket_comm_loop.c

@@ -21,6 +21,10 @@
  */
 
 
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <errno.h>
 #include <stdbool.h>
 #include <stddef.h>

pceplib/pcep_socket_comm_mock.c

@@ -27,6 +27,10 @@
  * created.
  */
 
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <netinet/in.h>
 #include <stdbool.h>
 #include <stdlib.h>

pceplib/pcep_timers.c

@@ -25,6 +25,10 @@
  *  Implementation of public API timer functions.
  */
 
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <limits.h>
 #include <pthread.h>
 #include <stddef.h>

pceplib/pcep_timers_event_loop.c

@@ -21,6 +21,10 @@
  */
 
 
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <errno.h>
 #include <stddef.h>
 #include <stdbool.h>

pceplib/pcep_utils_double_linked_list.c

@@ -20,6 +20,10 @@
  *
  */
 
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <stddef.h>
 #include <string.h>
 

pceplib/pcep_utils_logging.c

@@ -21,6 +21,10 @@
  */
 
 
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <stdarg.h>
 #include <stdio.h>
 #include "pcep_utils_logging.h"

pceplib/pcep_utils_memory.c

@@ -20,6 +20,10 @@
  *
  */
 
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <stdlib.h>
 #include <string.h>
 

pceplib/pcep_utils_ordered_list.c

@@ -21,6 +21,10 @@
  */
 
 
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <stdio.h>
 #include <string.h>
 

pceplib/pcep_utils_queue.c

@@ -21,6 +21,10 @@
  */
 
 
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <stdbool.h>
 #include <stdio.h>
 #include <string.h>

pceplib/test/pcep_msg_messages_test.c

@@ -21,6 +21,10 @@
  */
 
 
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <stdlib.h>
 
 #include <CUnit/CUnit.h>

pceplib/test/pcep_msg_messages_tests.c

@@ -21,6 +21,10 @@
  */
 
 
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <CUnit/Basic.h>
 #include <CUnit/CUnit.h>
 #include <CUnit/TestDB.h>

pceplib/test/pcep_msg_object_error_types_test.c

@@ -21,6 +21,10 @@
  */
 
 
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <stdio.h>
 
 #include <CUnit/CUnit.h>

pceplib/test/pcep_msg_objects_test.c

@@ -21,6 +21,10 @@
  */
 
 
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <stdlib.h>
 
 #include <CUnit/CUnit.h>

pceplib/test/pcep_msg_tools_test.c

@@ -21,6 +21,10 @@
  */
 
 
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <stdio.h>
 #include <stdlib.h>
 #include <unistd.h>

pceplib/test/pcep_pcc_api_test.c

@@ -21,6 +21,10 @@
  */
 
 
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <netdb.h> // gethostbyname
 #include <pthread.h>
 #include <stdlib.h>

pceplib/test/pcep_pcc_api_tests.c

@@ -21,6 +21,10 @@
  */
 
 
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <CUnit/Basic.h>
 #include <CUnit/CUnit.h>
 #include <CUnit/TestDB.h>

pceplib/test/pcep_session_logic_loop_test.c

@@ -21,6 +21,10 @@
  */
 
 
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <pthread.h>
 #include <stdlib.h>
 #include <string.h>

pceplib/test/pcep_session_logic_states_test.c

@@ -21,6 +21,10 @@
  */
 
 
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <stdlib.h>
 #include <string.h>
 

pceplib/test/pcep_session_logic_test.c

@@ -21,6 +21,10 @@
  */
 
 
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <stdlib.h>
 #include <string.h>
 #include <time.h>

pceplib/test/pcep_session_logic_tests.c

@@ -21,6 +21,10 @@
  */
 
 
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <CUnit/Basic.h>
 #include <CUnit/CUnit.h>
 #include <CUnit/TestDB.h>

pceplib/test/pcep_socket_comm_loop_test.c

@@ -21,6 +21,10 @@
  */
 
 
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <pthread.h>
 #include <stdlib.h>
 

pceplib/test/pcep_socket_comm_test.c

@@ -21,6 +21,10 @@
  */
 
 
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <netinet/in.h>
 
 #include <CUnit/CUnit.h>

pceplib/test/pcep_socket_comm_tests.c

@@ -21,6 +21,10 @@
  */
 
 
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <CUnit/Basic.h>
 #include <CUnit/CUnit.h>
 #include <CUnit/TestDB.h>

pceplib/test/pcep_timers_event_loop_test.c

@@ -21,6 +21,10 @@
  */
 
 
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <stdlib.h>
 
 #include <CUnit/CUnit.h>

pceplib/test/pcep_timers_test.c

@@ -21,6 +21,10 @@
  */
 
 
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <stdbool.h>
 #include <CUnit/CUnit.h>
 

pceplib/test/pcep_timers_tests.c

@@ -21,6 +21,10 @@
  */
 
 
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <CUnit/Basic.h>
 #include <CUnit/CUnit.h>
 #include <CUnit/TestDB.h>

pceplib/test/pcep_utils_counters_test.c

@@ -21,6 +21,10 @@
  */
 
 
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <stdlib.h>
 
 #include <CUnit/CUnit.h>

pceplib/test/pcep_utils_double_linked_list_test.c

@@ -21,6 +21,10 @@
  */
 
 
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <CUnit/CUnit.h>
 
 #include "pcep_utils_double_linked_list.h"

pceplib/test/pcep_utils_memory_test.c

@@ -21,6 +21,10 @@
  */
 
 
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <stdlib.h>
 #include <stdint.h>
 

pceplib/test/pcep_utils_ordered_list_test.c

@@ -21,6 +21,10 @@
  */
 
 
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <CUnit/CUnit.h>
 
 #include "pcep_utils_ordered_list.h"

pceplib/test/pcep_utils_queue_test.c

@@ -21,6 +21,10 @@
  */
 
 
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <CUnit/CUnit.h>
 
 #include "pcep_utils_queue.h"

pceplib/test/pcep_utils_tests.c

@@ -21,6 +21,10 @@
  */
 
 
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <CUnit/Basic.h>
 #include <CUnit/CUnit.h>
 #include <CUnit/TestDB.h>

pimd/pim_nb_config.c

@@ -17,6 +17,8 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+#include <zebra.h>
+
 #include "pimd.h"
 #include "pim_nb.h"
 #include "lib/northbound_cli.h"

python/firstheader.py

@@ -1,30 +1,90 @@
-#
 # check that the first header included in C files is either
 # zebra.h or config.h
 #
+# Copyright (C) 2020  David Lamparter for NetDEF, Inc.
+#
+# This program is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by the Free
+# Software Foundation; either version 2 of the License, or (at your option)
+# any later version.
+#
+# This program is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+# more details.
+#
+# You should have received a copy of the GNU General Public License along
+# with this program; see the file COPYING; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 
-import sys, os, re, subprocess
+import sys
+import os
+import re
+import subprocess
+import argparse
+
+argp = argparse.ArgumentParser(description="include fixer")
+argp.add_argument("--autofix", action="store_const", const=True)
+argp.add_argument("--warn-empty", action="store_const", const=True)
+argp.add_argument("--pipe", action="store_const", const=True)
 
 include_re = re.compile('^#\s*include\s+["<]([^ ">]+)[">]', re.M)
 
-errors = 0
+ignore = [
+    lambda fn: fn.startswith("tools/"),
+    lambda fn: fn
+    in [
+        "lib/elf_py.c",
+    ],
+]
+
+
+def run(args):
+    out = []
+
+    files = subprocess.check_output(["git", "ls-files"]).decode("ASCII")
+    for fn in files.splitlines():
+        if not fn.endswith(".c"):
+            continue
+        if max([i(fn) for i in ignore]):
+            continue
+
+        with open(fn, "r") as fd:
+            data = fd.read()
 
-files = subprocess.check_output(["git", "ls-files"]).decode("ASCII")
-for fn in files.splitlines():
-    if not fn.endswith(".c"):
-        continue
-    if fn.startswith("tools/"):
-        continue
-    with open(fn, "r") as fd:
-        data = fd.read()
         m = include_re.search(data)
         if m is None:
-            # sys.stderr.write('no #include in %s?\n' % (fn))
+            if args.warn_empty:
+                sys.stderr.write("no #include in %s?\n" % (fn))
             continue
         if m.group(1) in ["config.h", "zebra.h", "lib/zebra.h"]:
             continue
-        sys.stderr.write("%s: %s\n" % (fn, m.group(0)))
-        errors += 1
 
-if errors:
-    sys.exit(1)
+        if args.autofix:
+            sys.stderr.write("%s: %s - fixing\n" % (fn, m.group(0)))
+            if fn.startswith("pceplib/"):
+                insert = '#ifdef HAVE_CONFIG_H\n#include "config.h"\n#endif\n\n'
+            else:
+                insert = "#include <zebra.h>\n\n"
+
+            pos = m.span()[0]
+
+            data = data[:pos] + insert + data[pos:]
+            with open(fn + ".new", "w") as fd:
+                fd.write(data)
+            os.rename(fn + ".new", fn)
+        else:
+            sys.stderr.write("%s: %s\n" % (fn, m.group(0)))
+            out.append(fn)
+
+    if len(out):
+        if args.pipe:
+            # for "vim `firstheader.py`"
+            print("\n".join(out))
+        return 1
+    return 0
+
+
+if __name__ == "__main__":
+    args = argp.parse_args()
+    sys.exit(run(args))

staticd/static_nb.c

@@ -16,6 +16,8 @@
  * with this program; see the file COPYING; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  */
+#include <zebra.h>
+
 #include "northbound.h"
 #include "libfrr.h"
 #include "static_nb.h"

staticd/static_nb_config.c

@@ -16,6 +16,8 @@
  * with this program; see the file COPYING; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  */
+#include <zebra.h>
+
 #include "northbound.h"
 #include "libfrr.h"
 #include "log.h"

zebra/zebra_routemap_nb.c

@@ -17,6 +17,8 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+#include <zebra.h>
+
 #include "northbound.h"
 #include "libfrr.h"
 #include "zebra_routemap_nb.h"