ok, rework myfprintf so it uses write() and never use any file stream

TODO

@@ -4,10 +4,6 @@
 		quit in the middle of an update
 	k) when bg-update, have parent print out new old stuff to log on 
 		reading db, not the child
-	l) IMPORTANT: look over new command list shiznit and make it much 
-		cleaner, please! (in particular, move buffer2array code from 
-		interface.c to command.c, and have command stuff 
-		do buffer2array)
 	m) MOST IMPORTANT: update needs to deal better with directories/files
 		that don't exist in the db, but do exit in the fs (i.e.
 		calling updated on a newly created file).

src/directory.c

@@ -553,7 +553,6 @@ int printDirectoryInfo(FILE * fp, char * name) {
 	return 0;
 }
 
-/* DON'T BLOCK SIGNALS IN THIS FUNCTION, called by writeDirectoryDB() */
 void writeDirectoryInfo(FILE * fp, Directory * directory) {
 	ListNode * node = (directory->subDirectories)->firstNode;
 	Directory * subDirectory;
@@ -685,17 +684,12 @@ int writeDirectoryDB() {
 	while(!(fp=fopen(directorydb,"w")) && errno==EINTR);
 	if(!fp) return -1;
 
-	/* block signals so we ensure the db doesn't get corrupted */
-	/* no functions that writeDirectoryInfoCalls should mess with
-	   signals or signal blocking! */
-	blockSignals();
 	myfprintf(fp,"%s\n",DIRECTORY_INFO_BEGIN);
 	myfprintf(fp,"%s%s\n",DIRECTORY_MPD_VERSION,VERSION);
 	myfprintf(fp,"%s%s\n",DIRECTORY_FS_CHARSET,getFsCharset());
 	myfprintf(fp,"%s\n",DIRECTORY_INFO_END);
 
 	writeDirectoryInfo(fp,mp3rootDirectory);
-	unblockSignals();
 
 	while(fclose(fp) && errno==EINTR);
 

src/interface.c

@@ -84,14 +84,13 @@ void openInterface(Interface * interface, int fd) {
 	
 	assert(interface->open==0);
 
-	blockSignals();
 	interface->bufferLength = 0;
 	interface->fd = fd;
 	/* fcntl(interface->fd,F_SETOWN,(int)getpid()); */
-	flags = fcntl(fd,F_GETFL);
+	while((flags = fcntl(fd,F_GETFL))<0 && errno==EINTR);
 	flags|=O_NONBLOCK;
-	fcntl(interface->fd,F_SETFL,flags);
-	interface->fp = fdopen(fd,"rw");
+	while(fcntl(interface->fd,F_SETFL,flags)<0 && errno==EINTR);
+	while((interface->fp = fdopen(fd,"rw"))==NULL && errno==EINTR);
 	interface->open = 1;
 	interface->lastTime = time(NULL);
 	interface->commandList = NULL;
@@ -121,8 +120,6 @@ void openInterface(Interface * interface, int fd) {
 #endif
 	interface->outBuffer = malloc(interface->outBufSize);
 	
-	unblockSignals();
-
 	myfprintf(interface->fp,"%s %s %s\n",COMMAND_RESPOND_OK,GREETING,
 			VERSION);
 	printInterfaceOutBuffer(interface);

src/myfprintf.c

@@ -33,6 +33,21 @@ int myfprintf_stdLogMode = 0;
 FILE * myfprintf_out;
 FILE * myfprintf_err;
 
+void blockingWrite(int fd, char * string) {
+	int len = strlen(string);
+	int ret;
+
+	while(len) {
+		ret = write(fd,string,len);
+		if(ret<0) {
+			if(errno==EAGAIN || errno==EINTR) continue;
+			return;
+		}
+		len-= ret;
+		string+= ret;
+	}
+}
+
 void myfprintfStdLogMode(FILE * out, FILE * err) {
 	myfprintf_stdLogMode = 1;
 	myfprintf_out = out;
@@ -40,31 +55,33 @@ void myfprintfStdLogMode(FILE * out, FILE * err) {
 }
 
 void myfprintf(FILE * fp, char * format, ... ) {
+	char buffer[BUFFER_LENGTH+1];
 	va_list arglist;
 	int fd = fileno(fp);
 	int fcntlret;
 
+	memset(buffer,0,BUFFER_LENGTH+1);
+
 	va_start(arglist,format);
 	while((fcntlret=fcntl(fd,F_GETFL))==-1 && errno==EINTR);
 	if(myfprintf_stdLogMode && (fd==1 || fd==2)) {
-		char str[15];
 		time_t t = time(NULL);
 		if(fd==1) fp = myfprintf_out;
 		else fp = myfprintf_err;
-		strftime(str,14,"%b %e %R",localtime(&t));
-		fprintf(fp,"%s : ",str);
-		vfprintf(fp,format,arglist);
+		strftime(buffer,14,"%b %e %R",localtime(&t));
+		blockingWrite(fd,buffer);
+		blockingWrite(fd," : ");
+		vsnprintf(buffer,BUFFER_LENGTH,format,arglist);
+		blockingWrite(fd,buffer);
 	}
-	else if(fcntlret & O_NONBLOCK) {
-		char buffer[BUFFER_LENGTH+1];
+	else {
 		vsnprintf(buffer,BUFFER_LENGTH,format,arglist);
-		if(interfacePrintWithFD(fd,buffer)<0) {
-			/* not a fd from a interface */
-			vfprintf(fp,format,arglist);
+		if((fcntlret & O_NONBLOCK) && 
+				interfacePrintWithFD(fd,buffer)==0) 
+		{
 		}
+		else blockingWrite(fd,buffer);
 	}
-	else vfprintf(fp,format,arglist);
-	fflush(fp);
 
 	va_end(arglist);
 }

src/player.c

@@ -397,7 +397,7 @@ int playerSeek(FILE * fp, char * utf8file, float time) {
 	if(strcmp(pc->file,file)!=0) {
 		decodeType = playerGetDecodeType(utf8file);
 		if(decodeType < 0) {
-			printf("%s unknown file type: %s\n",
+			myfprintf(fp,"%s unknown file type: %s\n",
 				COMMAND_RESPOND_ERROR, utf8file);
 			return -1;
 		}

src/playlist.c

@@ -501,12 +501,12 @@ int swapSongsInPlaylist(FILE * fp, int song1, int song2) {
 	int currentSong = -1;
 
 	if(song1<0 || song1>=playlist.length) {
-		fprintf(fp,"%s \"%i\" is not in the playlist\n",
+		myfprintf(fp,"%s \"%i\" is not in the playlist\n",
 				COMMAND_RESPOND_ERROR,song1);
 		return -1;
 	}
 	if(song2<0 || song2>=playlist.length) {
-		fprintf(fp,"%s \"%i\" is not in the playlist\n",
+		myfprintf(fp,"%s \"%i\" is not in the playlist\n",
 				COMMAND_RESPOND_ERROR,song2);
 		return -1;
 	}
@@ -796,13 +796,13 @@ int moveSongInPlaylist(FILE * fp, int from, int to) {
 	int currentSong = -1;
 
 	if(from<0 || from>=playlist.length) {
-		fprintf(fp,"%s \"%i\" is not a song in the playlist\n",
+		myfprintf(fp,"%s \"%i\" is not a song in the playlist\n",
 				COMMAND_RESPOND_ERROR,from);
 		return -1;
 	}
 
 	if(to<0 || to>=playlist.length) {
-		fprintf(fp,"%s \"%i\" is not a song in the playlist\n",
+		myfprintf(fp,"%s \"%i\" is not a song in the playlist\n",
 				COMMAND_RESPOND_ERROR,to);
 		return -1;
 	}

src/song.c

@@ -132,7 +132,6 @@ void freeSongList(SongList * list) {
 	freeList(list);
 }
 
-/* DON'T BLOCK SIGNALS IN THIS FUNCTION, called by writeDirectoryDB() */
 int printSongInfo(FILE * fp, Song * song) {
 	myfprintf(fp,"%s%s\n",SONG_FILE,song->utf8file);
 
@@ -152,7 +151,6 @@ int printSongInfoFromList(FILE * fp, SongList * list) {
 	return 0;
 }
 
-/* DON'T BLOCK SIGNALS IN THIS FUNCTION, called by writeDirectoryDB() */
 void writeSongInfoFromList(FILE * fp, SongList * list) {
 	ListNode * tempNode = list->firstNode;
 

src/tag.c

@@ -51,7 +51,6 @@
 #include "mp4ff/mp4ff.h"
 #endif
 
-/* DON'T BLOCK SIGNALS IN THIS FUNCTION, called by writeDirectoryDB() */
 void printMpdTag(FILE * fp, MpdTag * tag) {
 	if(tag->artist) myfprintf(fp,"Artist: %s\n",tag->artist);
 	if(tag->album) myfprintf(fp,"Album: %s\n",tag->album);