More work on implementing calcurse daemon.

6 files changed, 55 insertions, 28 deletions

diff --git a/src/dmon.c b/src/dmon.c
index 9aae65f..a52d7a5 100644
--- a/src/dmon.c
+++ b/src/dmon.c
@@ -1,4 +1,4 @@
-/*	$calcurse: dmon.c,v 1.2 2009/07/23 18:33:20 culot Exp $	*/
+/*	$calcurse: dmon.c,v 1.3 2009/07/26 12:47:15 culot Exp $	*/
 
 /*
  * Calcurse - text-based organizer
@@ -61,6 +61,9 @@ dmon_sigs_hdlr (int sig)
   notify_free_app ();
   (void)io_fprintln (path_dmon_log, _("terminated at %s with signal %d\n"),
                      nowstr (), sig);
+
+  if (unlink (path_dpid) != 0)
+    EXIT (_("Could not remove daemon lock file: %s\n"), strerror (errno));
   
   exit (EXIT_SUCCESS);
 }
@@ -143,6 +146,9 @@ dmon_start (int parent_exit_status)
   if (!daemonize (parent_exit_status))
     EXIT (_("Cannot daemonize, aborting\n"));
 
+  if (!io_dump_pid (path_dpid))
+    EXIT (_("Could not set lock file\n"));
+  
   io_check_file (path_conf, (int *)0);
   custom_load_conf (&conf, 0);
   
diff --git a/src/io.c b/src/io.c
index ccd432d..3cd765d 100755
--- a/src/io.c
+++ b/src/io.c
@@ -1,4 +1,4 @@
-/*	$calcurse: io.c,v 1.72 2009/07/23 19:16:03 culot Exp $	*/
+/*	$calcurse: io.c,v 1.73 2009/07/26 12:47:15 culot Exp $	*/
 
 /*
  * Calcurse - text-based organizer
@@ -39,6 +39,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include <sys/stat.h>
+#include <sys/types.h>
 #include <time.h>
 #include <math.h>
 #include <unistd.h>
@@ -726,7 +727,8 @@ io_init (char *cfile, char *datadir)
       (void)snprintf (path_notes, BUFSIZ, "%s/" NOTES_DIR_NAME, home);
       (void)snprintf (path_apts, BUFSIZ, "%s/" APTS_PATH_NAME, home);
       (void)snprintf (path_keys, BUFSIZ, "%s/" KEYS_PATH_NAME, home);
-      (void)snprintf (path_lock, BUFSIZ, "%s/" LOCK_PATH_NAME, home);
+      (void)snprintf (path_cpid, BUFSIZ, "%s/" CPID_PATH_NAME, home);
+      (void)snprintf (path_dpid, BUFSIZ, "%s/" DPID_PATH_NAME, home);      
       (void)snprintf (path_dmon_log, BUFSIZ, "%s/" DLOG_PATH_NAME, home);
     }
   else
@@ -740,7 +742,8 @@ io_init (char *cfile, char *datadir)
       (void)snprintf (path_todo, BUFSIZ, "%s/" TODO_PATH, home);
       (void)snprintf (path_conf, BUFSIZ, "%s/" CONF_PATH, home);
       (void)snprintf (path_keys, BUFSIZ, "%s/" KEYS_PATH, home);
-      (void)snprintf (path_lock, BUFSIZ, "%s/" LOCK_PATH, home);
+      (void)snprintf (path_cpid, BUFSIZ, "%s/" CPID_PATH, home);
+      (void)snprintf (path_dpid, BUFSIZ, "%s/" DPID_PATH, home);      
       (void)snprintf (path_dmon_log, BUFSIZ, "%s/" DLOG_PATH, home);           
       (void)snprintf (path_notes, BUFSIZ, "%s/" NOTES_DIR, home);
       if (cfile == NULL)
@@ -2934,32 +2937,42 @@ io_set_lock (void)
 {
   FILE *lock;
 
-  if ((lock = fopen (path_lock, "r")) != NULL)
+  if ((lock = fopen (path_cpid, "r")) != NULL)
     {
       (void)fprintf (stderr,
                      _("\nWARNING: it seems that another calcurse instance is "
                        "already running.\n"
                        "If this is not the case, please remove the following "
                        "lock file: \n\"%s\"\n"
-                       "and restart calcurse.\n"), path_lock);
+                       "and restart calcurse.\n"), path_cpid);
       exit (EXIT_FAILURE);
     }
   else
     {
-      if ((lock = fopen (path_lock, "w")) == NULL)
-	{
-	  (void)fprintf (stderr, _("FATAL ERROR: could not create %s: %s\n"),
-                         path_lock, strerror (errno));
-	  exit_calcurse (EXIT_FAILURE);
-	}
-      (void)fclose (lock);
+      if (!io_dump_pid (path_cpid))
+        EXIT (_("FATAL ERROR: could not create %s: %s\n"),
+                         path_cpid, strerror (errno));
     }
 }  
 
-/* Used when calcurse exits to remove the lock file. */
-void
-io_unset_lock (void)
+/*
+ * Create a new file and write the process pid inside
+ * (used to create a simple lock for example).
+ */
+unsigned
+io_dump_pid (char *file)
 {
-  if (unlink (path_lock) != 0)
-    EXIT (_("Could not remove lock file: %s\n"), strerror (errno));
+  pid_t pid;
+  FILE *fp;
+  
+  if (!file)
+    return 0;
+
+  pid = getpid ();
+  if (!(fp = fopen (file, "w"))
+      || fprintf (fp, "%ld\n", (long)pid) < 0
+      || fclose (fp) != 0)
+    return 0;
+  
+  return 1;
 }
diff --git a/src/io.h b/src/io.h
index c71cb13..b910cd4 100755
--- a/src/io.h
+++ b/src/io.h
@@ -1,4 +1,4 @@
-/*	$calcurse: io.h,v 1.23 2009/07/23 18:33:21 culot Exp $	*/
+/*	$calcurse: io.h,v 1.24 2009/07/26 12:47:16 culot Exp $	*/
 
 /*
  * Calcurse - text-based organizer
@@ -87,6 +87,6 @@ void        io_log_free (io_file_t *);
 void        io_start_psave_thread (conf_t *);
 void        io_stop_psave_thread (void);
 void        io_set_lock (void);
-void        io_unset_lock (void);
+unsigned    io_dump_pid (char *);
 
 #endif /* !CALCURSE_IO_H */
diff --git a/src/utils.c b/src/utils.c
index 9e4da1d..e825196 100755
--- a/src/utils.c
+++ b/src/utils.c
@@ -1,4 +1,4 @@
-/*	$calcurse: utils.c,v 1.78 2009/07/23 18:33:21 culot Exp $	*/
+/*	$calcurse: utils.c,v 1.79 2009/07/26 12:47:16 culot Exp $	*/
 
 /*
  * Calcurse - text-based organizer
@@ -94,7 +94,11 @@ exit_calcurse (int status)
   keys_free ();
   mem_stats ();
   if (remove_lock)
-    io_unset_lock ();
+    {
+      if (unlink (path_cpid) != 0)
+        EXIT (_("Could not remove calcurse lock file: %s\n"),
+              strerror (errno));        
+    }
 
   dmon_start (status);
   
diff --git a/src/vars.c b/src/vars.c
index 0dc6a06..8038f9c 100755
--- a/src/vars.c
+++ b/src/vars.c
@@ -1,4 +1,4 @@
-/*	$calcurse: vars.c,v 1.18 2009/07/23 18:33:22 culot Exp $	*/
+/*	$calcurse: vars.c,v 1.19 2009/07/26 12:47:16 culot Exp $	*/
 
 /*
  * Calcurse - text-based organizer
@@ -102,7 +102,8 @@ char path_apts[] = "";
 char path_conf[] = "";
 char path_notes[] = "";
 char path_keys[] = "";
-char path_lock[] = "";
+char path_cpid[] = "";
+char path_dpid[] = "";
 char path_dmon_log[] = "";
 
 /* Variable to handle pads. */
diff --git a/src/vars.h b/src/vars.h
index 677c15a..3da83a6 100755
--- a/src/vars.h
+++ b/src/vars.h
@@ -1,4 +1,4 @@
-/*	$calcurse: vars.h,v 1.35 2009/07/23 18:33:22 culot Exp $	*/
+/*	$calcurse: vars.h,v 1.36 2009/07/26 12:47:17 culot Exp $	*/
 
 /*
  * Calcurse - text-based organizer
@@ -60,7 +60,8 @@
 #define APTS_PATH_NAME   "apts"
 #define CONF_PATH_NAME   "conf"
 #define KEYS_PATH_NAME   "keys"
-#define LOCK_PATH_NAME   ".calcurse.lock"
+#define CPID_PATH_NAME   ".calcurse.pid"
+#define DPID_PATH_NAME   ".daemon.pid"
 #define DLOG_PATH_NAME   "daemon.log"
 #define NOTES_DIR_NAME   "notes/"
 
@@ -68,8 +69,9 @@
 #define APTS_PATH        DIR_NAME APTS_PATH_NAME
 #define CONF_PATH        DIR_NAME CONF_PATH_NAME
 #define KEYS_PATH        DIR_NAME KEYS_PATH_NAME
-#define LOCK_PATH        DIR_NAME LOCK_PATH_NAME
+#define CPID_PATH        DIR_NAME CPID_PATH_NAME
 #define DLOG_PATH        DIR_NAME DLOG_PATH_NAME
+#define DPID_PATH        DIR_NAME DPID_PATH_NAME
 #define NOTES_DIR        DIR_NAME NOTES_DIR_NAME
 
 #define ATTR_FALSE	0
@@ -161,7 +163,8 @@ extern char           path_apts[BUFSIZ];
 extern char           path_conf[BUFSIZ];
 extern char           path_keys[BUFSIZ];
 extern char           path_notes[BUFSIZ];
-extern char           path_lock[BUFSIZ];
+extern char           path_cpid[BUFSIZ];
+extern char           path_dpid[BUFSIZ];
 extern char           path_dmon_log[BUFSIZ];
 
 extern struct pad_s   apad;