fastbootd: userspace implementation of the fastboot device-side protocol
Initial commit of fastbootd. A few commands work, but not
fully functional yet.
Change-Id: I589dee7b327b4460e94b4434aaf9bcf780faa839
diff --git a/fastbootd/config.c b/fastbootd/config.c
new file mode 100644
index 0000000..b8503fd
--- /dev/null
+++ b/fastbootd/config.c
@@ -0,0 +1,161 @@
+/*
+ * Copyright (c) 2013, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google, Inc. nor the names of its contributors
+ * may be used to endorse or promote products derived from this
+ * software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <fcntl.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/types.h>
+
+#include "protocol.h"
+
+#include "debug.h"
+
+// TODO: change config path
+#define CONFIG_PATH "/data/fastboot.cfg"
+
+static char *strip(char *str)
+{
+ int n;
+
+ n = strspn(str, " \t");
+ str += n;
+
+ for (n = strlen(str) - 1; n >= 0; n--) {
+ if (str[n] == ' ' || str[n] == '\t')
+ str[n] = '\0';
+ else
+ break;
+ }
+
+ return str;
+}
+
+static int config_parse_line(char *line)
+{
+ char *c;
+ char *key;
+ char *value;
+
+ c = strchr(line, '#');
+ if (c)
+ *c = '\0';
+
+ if (strspn(line, " \t") == strlen(line))
+ return 0;
+
+ c = strchr(line, '=');
+ if (c == NULL)
+ return -1;
+
+ key = line;
+ *c = '\0';
+ value = c + 1;
+
+ key = strip(key);
+ value = strip(value);
+
+ key = strdup(key);
+ value = strdup(value);
+
+ fastboot_publish(key, value);
+
+ return 0;
+}
+
+static void config_parse(char *buffer)
+{
+ char *saveptr;
+ char *str = buffer;
+ char *line = buffer;
+ int c;
+ int ret;
+
+ for (c = 1; line != NULL; c++) {
+ line = strtok_r(str, "\r\n", &saveptr);
+ if (line != NULL) {
+ D(VERBOSE, "'%s'", line);
+ ret = config_parse_line(line);
+ if (ret < 0) {
+ D(WARN, "error parsing " CONFIG_PATH " line %d", c);
+ }
+ }
+ str = NULL;
+ }
+}
+
+void config_init()
+{
+ int fd;
+ off_t len;
+ ssize_t ret;
+ size_t count = 0;
+ char *buffer;
+
+ fd = open(CONFIG_PATH, O_RDONLY);
+ if (fd < 0) {
+ D(ERR, "failed to open " CONFIG_PATH);
+ return;
+ }
+
+ len = lseek(fd, 0, SEEK_END);
+ if (len < 0) {
+ D(ERR, "failed to seek to end of " CONFIG_PATH);
+ return;
+ }
+
+ lseek(fd, 0, SEEK_SET);
+
+ buffer = malloc(len + 1);
+ if (buffer == NULL) {
+ D(ERR, "failed to allocate %ld bytes", len);
+ return;
+ }
+
+ while (count < (size_t)len) {
+ ret = read(fd, buffer + count, len - count);
+ if (ret < 0 && errno != EINTR) {
+ D(ERR, "failed to read " CONFIG_PATH ": %d %s", errno, strerror(errno));
+ return;
+ }
+ if (ret == 0) {
+ D(ERR, "early EOF reading " CONFIG_PATH);
+ return;
+ }
+
+ count += ret;
+ }
+
+ buffer[len] = '\0';
+
+ config_parse(buffer);
+
+ free(buffer);
+}