make copy_file() globally available

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

2 files changed, 59 insertions, 1 deletions

diff --git a/lib/Makefile b/lib/Makefile
index 4b1074d2a4..b5326906e1 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -27,4 +27,4 @@ obj-$(CONFIG_GLOB)		+= fnmatch.o
 obj-$(CONFIG_GENERIC_FIND_NEXT_BIT) += find_next_bit.o
 obj-y			+= glob.o
 obj-y			+= notifier.o
-
+obj-y			+= copy_file.o
diff --git a/lib/copy_file.c b/lib/copy_file.c
new file mode 100644
index 0000000000..0ff0435f11
--- /dev/null
+++ b/lib/copy_file.c
@@ -0,0 +1,58 @@
+#include <common.h>
+#include <fs.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <malloc.h>
+#define RW_BUF_SIZE	(ulong)4096
+
+/**
+ * @param[in] src FIXME
+ * @param[out] dst FIXME
+ */
+int copy_file(const char *src, const char *dst)
+{
+	char *rw_buf = NULL;
+	int srcfd = 0, dstfd = 0;
+	int r, w;
+	int ret = 1;
+
+	rw_buf = xmalloc(RW_BUF_SIZE);
+
+	srcfd = open(src, O_RDONLY);
+	if (srcfd < 0) {
+		printf("could not open %s: %s\n", src, errno_str());
+		goto out;
+	}
+
+	dstfd = open(dst, O_WRONLY | O_CREAT);
+	if (dstfd < 0) {
+		printf("could not open %s: %s\n", dst, errno_str());
+		goto out;
+	}
+
+	while(1) {
+		r = read(srcfd, rw_buf, RW_BUF_SIZE);
+		if (r < 0) {
+			perror("read");
+			goto out;
+		}
+		if (!r)
+			break;
+		w = write(dstfd, rw_buf, r);
+		if (w < 0) {
+			perror("write");
+			goto out;
+		}
+	}
+
+	ret = 0;
+out:
+	free(rw_buf);
+	if (srcfd > 0)
+		close(srcfd);
+	if (dstfd > 0)
+		close(dstfd);
+
+	return ret;
+}
+