[core] server.core-files support on FreeBSD (fixes #3128)

(thx devnexen)

x-ref:
  "server.core-files support on FreeBSD proposal"
  https://redmine.lighttpd.net/issues/3128

SConstruct

@@ -388,6 +388,7 @@ if 1:
 		'sys/loadavg.h',
 		'sys/poll.h',
 		'sys/prctl.h',
+		'sys/procctl.h',
 		'sys/sendfile.h',
 		'sys/time.h',
 		'sys/wait.h',

configure.ac

@@ -113,6 +113,7 @@ AC_CHECK_HEADERS([\
   sys/mman.h \
   sys/poll.h \
   sys/prctl.h \
+  sys/procctl.h \
   sys/resource.h \
   sys/select.h \
   sys/sendfile.h \

src/CMakeLists.txt

@@ -98,6 +98,7 @@ check_include_files(sys/mman.h HAVE_SYS_MMAN_H)
 check_include_files(sys/loadavg.h HAVE_SYS_LOADAVG_H)
 check_include_files(sys/poll.h HAVE_SYS_POLL_H)
 check_include_files(sys/prctl.h HAVE_SYS_PRCTL_H)
+check_include_files(sys/procctl.h HAVE_SYS_PROCCTL_H)
 check_include_files(sys/resource.h HAVE_SYS_RESOURCE_H)
 check_include_files(sys/sendfile.h HAVE_SYS_SENDFILE_H)
 check_include_files(sys/select.h HAVE_SYS_SELECT_H)

src/config.h.cmake

@@ -22,6 +22,7 @@
 #cmakedefine  HAVE_SYS_MMAN_H
 #cmakedefine  HAVE_SYS_POLL_H
 #cmakedefine  HAVE_SYS_PRCTL_H
+#cmakedefine  HAVE_SYS_PROCCTL_H
 #cmakedefine  HAVE_SYS_RESOURCE_H
 #cmakedefine  HAVE_SYS_SENDFILE_H
 #cmakedefine  HAVE_SYS_SELECT_H

src/meson.build

@@ -36,6 +36,7 @@ conf_data.set('HAVE_SYS_LOADAVG_H', compiler.has_header('sys/loadavg.h'))
 conf_data.set('HAVE_SYS_MMAN_H', compiler.has_header('sys/mman.h'))
 conf_data.set('HAVE_SYS_POLL_H', compiler.has_header('sys/poll.h'))
 conf_data.set('HAVE_SYS_PRCTL_H', compiler.has_header('sys/prctl.h'))
+conf_data.set('HAVE_SYS_PROCCTL_H', compiler.has_header('sys/procctl.h'))
 conf_data.set('HAVE_SYS_RESOURCE_H', compiler.has_header('sys/resource.h'))
 conf_data.set('HAVE_SYS_SENDFILE_H', compiler.has_header('sys/sendfile.h'))
 conf_data.set('HAVE_SYS_SELECT_H', compiler.has_header('sys/select.h'))

src/server.c

@@ -65,6 +65,9 @@ static const buffer default_server_tag = { CONST_STR_LEN(PACKAGE_DESC)+1, 0 };
 #ifdef HAVE_SYS_PRCTL_H
 # include <sys/prctl.h>
 #endif
+#ifdef HAVE_SYS_PROCCTL_H
+# include <sys/procctl.h>
+#endif
 
 #ifdef HAVE_MALLOC_H
 #ifndef LIGHTTPD_STATIC
@@ -1475,6 +1478,12 @@ static int server_main_setup (server * const srv, int argc, char **argv) {
 		if (srv->srvconf.enable_cores) {
 			prctl(PR_SET_DUMPABLE, 1, 0, 0, 0);
 		}
+#elif defined(HAVE_SYS_PROCCTL_H) && defined(PROC_TRACE_CTL_ENABLE)
+		/* (DragonFlyBSD has procctl(), but not PROC_TRACE_CTL_ENABLE) */
+		if (srv->srvconf.enable_cores) {
+			int dumpable = PROC_TRACE_CTL_ENABLE;
+			procctl(P_PID, 0, PROC_TRACE_CTL, &dumpable);
+		}
 #endif
 	}