Merge branch 'ph3-update-pidfile'

src/Makefile.am

@@ -6,6 +6,7 @@ bin_PROGRAMS = icecast
 
 noinst_HEADERS = \
     admin.h \
+    main.h \
     cfgfile.h \
     logging.h \
     sighandler.h \

src/cfgfile.c

@@ -42,6 +42,7 @@
 #include "fserve.h"
 #include "stats.h"
 #include "connection.h"
+#include "main.h"
 
 #define CATMODULE                       "CONFIG"
 #define CONFIG_DEFAULT_LOCATION         "Earth"
@@ -701,6 +702,7 @@ void config_reread_config(void)
         config_set_config(&new_config);
         config = config_get_config_unlocked();
         restart_logging(config);
+        main_config_reload(config);
         connection_reread_config(config);
         yp_recheck_config(config);
         fserve_recheck_mime_types(config);

src/main.c

@@ -60,6 +60,7 @@
 #include <pwd.h>
 #endif
 
+#include "main.h"
 #include "cfgfile.h"
 #include "util.h"
 #include "sighandler.h"
@@ -86,6 +87,8 @@
 static int background;
 static char *pidfile = NULL;
 
+static void pidfile_update(ice_config_t *config, int always_try);
+
 static void _fatal_error(const char *perr)
 {
 #ifdef WIN32_SERVICE
@@ -116,7 +119,7 @@ static void _stop_logging(void)
     log_close(playlistlog);
 }
 
-void initialize_subsystems(void)
+static void initialize_subsystems(void)
 {
     log_initialize();
     thread_initialize();
@@ -134,7 +137,7 @@ void initialize_subsystems(void)
 #endif
 }
 
-void shutdown_subsystems(void)
+static void shutdown_subsystems(void)
 {
     event_shutdown();
     fserve_shutdown();
@@ -162,6 +165,12 @@ void shutdown_subsystems(void)
     xslt_shutdown();
 }
 
+void main_config_reload(ice_config_t *config)
+{
+    ICECAST_LOG_DEBUG("Reloading configuration.");
+    pidfile_update(config, 0);
+}
+
 static int _parse_config_opts(int argc, char **argv, char *filename, size_t size)
 {
     int i = 1;
@@ -324,6 +333,58 @@ static int _start_listening(void)
     return 1;
 }
 
+static void pidfile_update(ice_config_t *config, int always_try)
+{
+    char *newpidfile = NULL;
+
+    if (config->pidfile) {
+        FILE *f;
+
+        /* check if the file actually changed */
+        if (pidfile && strcmp(pidfile, config->pidfile) == 0)
+            return;
+
+        ICECAST_LOG_DEBUG("New pidfile on %H", config->pidfile);
+
+        if (!always_try) {
+            if (config->chuid) {
+                ICECAST_LOG_ERROR("Can not write new pidfile, changeowner in effect.");
+                return;
+            }
+
+            if (config->chroot) {
+                ICECAST_LOG_ERROR("Can not write new pidfile, chroot in effect.");
+                return;
+            }
+        }
+
+        newpidfile = strdup(config->pidfile);
+        if (!newpidfile) {
+            ICECAST_LOG_ERROR("Can not allocate memory for pidfile filename. BAD.");
+            return;
+        }
+
+        f = fopen(newpidfile, "w");
+        if (!f) {
+            free(newpidfile);
+            ICECAST_LOG_ERROR("Can not open new pidfile for writing.");
+            return;
+        }
+
+        fprintf(f, "%lld\n", (long long int)getpid());
+        fclose(f);
+
+        ICECAST_LOG_INFO("pidfile %H updated.", pidfile);
+    }
+
+    if (newpidfile != pidfile) {
+        if (pidfile)
+            remove(pidfile);
+        free(pidfile);
+        pidfile = newpidfile;
+    }
+}
+
 /* bind the socket and start listening */
 static int _server_proc_init(void)
 {
@@ -337,17 +398,7 @@ static int _server_proc_init(void)
         return 0;
     }
 
-    /* recreate the pid file */
-    if (config->pidfile)
-    {
-        FILE *f;
-        pidfile = strdup (config->pidfile);
-        if (pidfile && (f = fopen (config->pidfile, "w")) != NULL)
-        {
-            fprintf (f, "%d\n", (int)getpid());
-            fclose (f);
-        }
-    }
+    pidfile_update(config, 1);
 
     return 1;
 }

src/main.h

@@ -0,0 +1,16 @@
+/* Icecast
+ *
+ * This program is distributed under the GNU General Public License, version 2.
+ * A copy of this license is included with this source.
+ *
+ * Copyright 2018,      Philipp "ph3-der-loewe" Schafft <lion@lion.leolix.org>,
+ */
+
+#ifndef __MAIN_H__
+#define __MAIN_H__
+
+#include "cfgfile.h"
+
+void main_config_reload(ice_config_t *config);
+
+#endif