auto import from //branches/cupcake/...@127101

1 files changed, 91 insertions, 0 deletions

diff --git a/vold/misc.c b/vold/misc.c
new file mode 100644
index 00000000..951414c6
--- /dev/null
+++ b/vold/misc.c
@@ -0,0 +1,91 @@
+
+/*
+ * Copyright (C) 2008 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <malloc.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+void *read_file(char *filename, ssize_t *_size)
+{
+	int ret, fd;
+	struct stat sb;
+	ssize_t size;
+	void *buffer = NULL;
+
+	/* open the file */
+	fd = open(filename, O_RDONLY);
+	if (fd < 0)
+		return NULL;
+
+	/* find out how big it is */
+	if (fstat(fd, &sb) < 0)
+		goto bail;
+	size = sb.st_size;
+
+	/* allocate memory for it to be read into */
+	buffer = malloc(size);
+	if (!buffer)
+		goto bail;
+
+	/* slurp it into our buffer */
+	ret = read(fd, buffer, size);
+	if (ret != size)
+		goto bail;
+
+	/* let the caller know how big it is */
+	*_size = size;
+
+bail:
+	close(fd);
+	return buffer;
+}
+char *truncate_sysfs_path(char *path, int num_elements_to_remove, char *buffer)
+{
+    int i;
+
+    strcpy(buffer, path);
+
+    for (i = 0; i < num_elements_to_remove; i++) {
+        char *p = &buffer[strlen(buffer)-1];
+
+        for (p = &buffer[strlen(buffer) -1]; *p != '/'; p--);
+        *p = '\0';
+    }
+
+    return buffer;
+}
+
+char *read_sysfs_var(char *buffer, size_t maxlen, char *devpath, char *var)
+{
+    char filename[255];
+    char *p;
+    ssize_t sz;
+
+    sprintf(filename, "/sys%s/%s", devpath, var);
+    p = read_file(filename, &sz);
+    p[(strlen(p) - 1)] = '\0';
+    strncpy(buffer, p, maxlen);
+    free(p);
+    return buffer;
+}
+