Initial eventcmd work

More useful events should be added...

5 files changed, 74 insertions, 0 deletions

diff --git a/src/main.c b/src/main.c
index 93fa317..06f5975 100644
--- a/src/main.c
+++ b/src/main.c
@@ -231,6 +231,10 @@ int main (int argc, char **argv) {
 					player.gain = curSong->fileGain;
 					player.audioFormat = curSong->audioFormat;
 		
+					/* throw event */
+					BarUiStartEventCmd (&settings, "songstart", curStation,
+							curSong);
+
 					/* start player */
 					pthread_create (&playerThread, NULL, BarPlayerThread,
 							&player);
diff --git a/src/settings.c b/src/settings.c
index a0dabb5..786eb53 100644
--- a/src/settings.c
+++ b/src/settings.c
@@ -89,6 +89,7 @@ void BarSettingsDestroy (BarSettings_t *settings) {
 	free (settings->lastfmUser);
 	free (settings->lastfmPassword);
 	free (settings->autostartStation);
+	free (settings->eventCmd);
 	memset (settings, 0, sizeof (*settings));
 }
 
@@ -245,6 +246,8 @@ void BarSettingsRead (BarSettings_t *settings) {
 			}
 		} else if (strcmp ("autostart_station", key) == 0) {
 			settings->autostartStation = strdup (val);
+		} else if (strcmp ("event_command", key) == 0) {
+			settings->eventCmd = strdup (val);
 		}
 	}
 
diff --git a/src/settings.h b/src/settings.h
index 1bea648..3fed541 100644
--- a/src/settings.h
+++ b/src/settings.h
@@ -52,6 +52,7 @@ struct BarSettings {
 	} *keys;
 	PianoAudioFormat_t audioFormat;
 	char *autostartStation;
+	char *eventCmd;
 };
 
 typedef struct BarSettings BarSettings_t;
diff --git a/src/ui.c b/src/ui.c
index 694e06c..6154371 100644
--- a/src/ui.c
+++ b/src/ui.c
@@ -29,6 +29,11 @@ THE SOFTWARE.
 #include <stdlib.h>
 #include <string.h>
 #include <readline/readline.h>
+#include <errno.h>
+
+/* waitpid () */
+#include <sys/types.h>
+#include <sys/wait.h>
 
 #include "ui.h"
 
@@ -398,3 +403,60 @@ inline void BarUiPrintSong (PianoSong_t *song, PianoStation_t *station) {
 			station != NULL ? " @ " : "",
 			station != NULL ? station->name : "");
 }
+
+/*	Excute external event handler
+ *	@param settings containing the cmdline
+ *	@param event type
+ *	@param current station
+ *	@param current song
+ *	@param piano error-code
+ */
+void BarUiStartEventCmd (const BarSettings_t *settings, const char *type,
+		const PianoStation_t *curStation, const PianoSong_t *curSong) {
+	pid_t chld;
+	char pipeBuf[1024];
+	int pipeFd[2];
+
+	if (settings->eventCmd == NULL) {
+		/* nothing to do... */
+		return;
+	}
+
+	/* prepare stdin content */
+	memset (pipeBuf, 0, sizeof (pipeBuf));
+	snprintf (pipeBuf, sizeof (pipeBuf),
+			"artist=%s\n"
+			"title=%s\n"
+			"album=%s\n"
+			"stationName=%s\n",
+			curSong->artist,
+			curSong->title,
+			curSong->album,
+			curStation->name);
+	
+	if (pipe (pipeFd) == -1) {
+		BarUiMsg (MSG_ERR, "Cannot create eventcmd pipe. (%s)\n", strerror (errno));
+		return;
+	}
+
+	chld = fork ();
+	if (chld == 0) {
+		/* child */
+		close (pipeFd[1]);
+		dup2 (pipeFd[0], fileno (stdin));
+		execl (settings->eventCmd, settings->eventCmd, type, NULL);
+		BarUiMsg (MSG_ERR, "Cannot start eventcmd. (%s)\n", strerror (errno));
+		close (pipeFd[0]);
+		exit (1);
+	} else if (chld == -1) {
+		BarUiMsg (MSG_ERR, "Cannot fork eventcmd. (%s)\n", strerror (errno));
+	} else {
+		/* parent */
+		int status;
+		close (pipeFd[0]);
+		write (pipeFd[1], pipeBuf, strlen (pipeBuf));
+		close (pipeFd[1]);
+		/* wait to get rid of the zombie */
+		waitpid (chld, &status, 0);
+	}
+}
diff --git a/src/ui.h b/src/ui.h
index 084bce0..794003d 100644
--- a/src/ui.h
+++ b/src/ui.h
@@ -26,6 +26,8 @@ THE SOFTWARE.
 
 #include <piano.h>
 
+#include "settings.h"
+
 typedef enum {MSG_NONE, MSG_INFO, MSG_PLAYING, MSG_TIME, MSG_ERR,
 		MSG_QUESTION, MSG_LIST} uiMsg_t;
 
@@ -38,5 +40,7 @@ char *BarUiSelectMusicId (const PianoHandle_t *ph);
 void BarStationFromGenre (PianoHandle_t *ph);
 inline void BarUiPrintStation (PianoStation_t *);
 inline void BarUiPrintSong (PianoSong_t *, PianoStation_t *);
+void BarUiStartEventCmd (const BarSettings_t *settings, const char *type,
+		const PianoStation_t *curStation, const PianoSong_t *curSong);
 
 #endif /* _UI_H */