Move ucmb to packages feed.

git-svn-id: svn://svn.openwrt.org/openwrt/packages@14561 3c298f89-4303-0410-b956-a3cf2f4a3e73

utils/ucmb-tools/tools/ucmb.c

@@ -0,0 +1,91 @@
+/*
+ * Microcontroller Message Bus
+ * Userspace commandline utility
+ *
+ * Copyright (c) 2009 Michael Buesch <mb@bu3sch.de>
+ *
+ * Licensed under the GNU/GPL. See COPYING for details.
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <errno.h>
+
+
+#define UCMB_DEV	"/dev/ucmb"
+
+
+static void usage(int argc, char **argv)
+{
+	fprintf(stderr, "Usage: %s read|write\n", argv[0]);
+}
+
+int main(int argc, char **argv)
+{
+	const char *command;
+	int errcode = 0;
+	int ucmb_fd;
+	char *buf;
+	size_t count, buflen;
+	ssize_t nrbytes;
+
+	if (argc != 2) {
+		usage(argc, argv);
+		return 1;
+	}
+	command = argv[1];
+
+	ucmb_fd = open(UCMB_DEV, O_RDWR);
+	if (ucmb_fd == -1) {
+		fprintf(stderr, "Failed to open %s\n", UCMB_DEV);
+		errcode = 1;
+		goto out;
+	}
+
+	buflen = 4096;
+	buf = malloc(buflen);
+	if (!buf) {
+		fprintf(stderr, "Out of memory\n");
+		errcode = 1;
+		goto out_close;
+	}
+
+	if (strcasecmp(command, "read") == 0) {
+		nrbytes = read(ucmb_fd, buf, buflen);
+		if (nrbytes < 0) {
+			fprintf(stderr, "Failed to read UCMB: %s (%d)\n",
+				strerror(errno), errno);
+			goto out_free;
+		}
+		if (fwrite(buf, nrbytes, 1, stdout) != 1) {
+			fprintf(stderr, "Failed to write stdout\n");
+			goto out_free;
+		}
+	} else if (strcasecmp(command, "write") == 0) {
+		count = fread(buf, 1, buflen, stdin);
+		if (!count) {
+			fprintf(stderr, "Failed to read stdin\n");
+			goto out_free;
+		}
+		nrbytes = write(ucmb_fd, buf, count);
+		if (nrbytes != count) {
+			fprintf(stderr, "Failed to write UCMB: %s (%d)\n",
+				strerror(errno), errno);
+			goto out_free;
+		}
+	} else {
+		usage(argc, argv);
+		errcode = 1;
+		goto out_free;
+	}
+
+out_free:
+	free(buf);
+out_close:
+	close(ucmb_fd);
+out:
+	return errcode;
+}