libcharon: Execute scripts defined in strongswan.conf during startup/shutdown

diff --git a/src/libcharon/daemon.c b/src/libcharon/daemon.c
index 0cecd1d3b0a82c17da19138ac329931e8cad7943..16babf014f7b072fbf6217c28cfc816f25b30f90 100644 (file)
--- a/src/libcharon/daemon.c
+++ b/src/libcharon/daemon.c
@@ -21,6 +21,7 @@
 #include <unistd.h>
 #include <syslog.h>
 #include <time.h>
+#include <errno.h>
 
 #include "daemon.h"
 
@@ -476,6 +477,53 @@ static void destroy(private_daemon_t *this)
        free(this);
 }
 
+/**
+ * Run a set of configured scripts
+ */
+static void run_scripts(private_daemon_t *this, char *verb)
+{
+       enumerator_t *enumerator;
+       char *key, *value, *pos, buf[1024];
+       FILE *cmd;
+
+       enumerator = lib->settings->create_key_value_enumerator(lib->settings,
+                                                                                               "%s.%s-scripts", lib->ns, verb);
+       while (enumerator->enumerate(enumerator, &key, &value))
+       {
+               DBG1(DBG_DMN, "executing %s script '%s' (%s):", verb, key, value);
+               cmd = popen(value, "r");
+               if (!cmd)
+               {
+                       DBG1(DBG_DMN, "executing %s script '%s' (%s) failed: %s",
+                                verb, key, value, strerror(errno));
+                       continue;
+               }
+               while (TRUE)
+               {
+                       if (!fgets(buf, sizeof(buf), cmd))
+                       {
+                               if (ferror(cmd))
+                               {
+                                       DBG1(DBG_DMN, "reading from %s script '%s' (%s) failed",
+                                                verb, key, value);
+                               }
+                               break;
+                       }
+                       else
+                       {
+                               pos = buf + strlen(buf);
+                               if (pos > buf && pos[-1] == '\n')
+                               {
+                                       pos[-1] = '\0';
+                               }
+                               DBG1(DBG_DMN, "%s: %s", key, buf);
+                       }
+               }
+               pclose(cmd);
+       }
+       enumerator->destroy(enumerator);
+}
+
 METHOD(daemon_t, start, void,
           private_daemon_t *this)
 {
@@ -483,6 +531,8 @@ METHOD(daemon_t, start, void,
        lib->processor->set_threads(lib->processor,
                                                lib->settings->get_int(lib->settings, "%s.threads",
                                                                                           DEFAULT_THREADS, lib->ns));
+
+       run_scripts(this, "start");
 }
 
 
@@ -598,6 +648,8 @@ void libcharon_deinit()
                return;
        }
 
+       run_scripts(this, "stop");
+
        destroy(this);
        charon = NULL;
 }