merge

src/libdraw/openfont.c

@@ -3,6 +3,7 @@
 #include <draw.h>
 
 extern vlong _drawflength(int);
+int _fontpipe(char*);
 
 Font*
 openfont(Display *d, char *name)
@@ -27,26 +28,78 @@ openfont(Display *d, char *name)
 		}
 		name = nambuf;
 	}
+	if(fd >= 0)
+		n = _drawflength(fd);
+	if(fd < 0 && strncmp(name, "/mnt/font/", 10) == 0) {
+		fd = _fontpipe(name+10);
+		n = 8192;
+	}
 	if(fd < 0)
 		return 0;
 
-	n = _drawflength(fd);
 	buf = malloc(n+1);
 	if(buf == 0){
 		close(fd);
 		free(nambuf);
 		return 0;
 	}
-	buf[n] = 0;
-	i = read(fd, buf, n);
+	i = readn(fd, buf, n);
 	close(fd);
-	if(i != n){
+	if(i <= 0){
 		free(buf);
 		free(nambuf);
 		return 0;
 	}
+	buf[i] = 0;
 	fnt = buildfont(d, buf, name);
 	free(buf);
 	free(nambuf);
 	return fnt;
 }
+
+int
+_fontpipe(char *name)
+{
+	int p[2];
+	char c;
+	char buf[1024], *argv[10];
+	int nbuf, pid;
+	
+	if(pipe(p) < 0)
+		return -1;
+	pid = rfork(RFNOWAIT|RFFDG|RFPROC);
+	if(pid < 0) {
+		close(p[0]);
+		close(p[1]);
+		return -1;
+	}
+	if(pid == 0) {
+		close(p[0]);
+		dup(p[1], 1);
+		dup(p[1], 2);
+		if(p[1] > 2)
+			close(p[1]);
+		argv[0] = "fontsrv";
+		argv[1] = "-pp";
+		argv[2] = name;
+		argv[3] = nil;
+		execvp("fontsrv", argv);
+		print("exec fontsrv: %r\n");
+		_exit(0);
+	}
+	close(p[1]);
+	
+	// success marked with leading \001.
+	// otherwise an error happened.
+	for(nbuf=0; nbuf<sizeof buf-1; nbuf++) {
+		if(read(p[0], &c, 1) < 1 || c == '\n') {
+			buf[nbuf] = '\0';
+			werrstr(buf);
+			close(p[0]);
+			return -1;
+		}
+		if(c == '\001')
+			break;
+	}
+	return p[0];
+}