tools: Move copyfile() into a common file

This function is useful in other places. Move it to a common file.

Signed-off-by: Simon Glass <sjg@chromium.org>

3 files changed, 67 insertions, 56 deletions

diff --git a/tools/fit_common.c b/tools/fit_common.c
index 5c8920de54..4370de2f61 100644
--- a/tools/fit_common.c
+++ b/tools/fit_common.c
@@ -119,3 +119,59 @@ err:
 
 	return -1;
 }
+
+int copyfile(const char *src, const char *dst)
+{
+	int fd_src = -1, fd_dst = -1;
+	void *buf = NULL;
+	ssize_t size;
+	size_t count;
+	int ret = -1;
+
+	fd_src = open(src, O_RDONLY);
+	if (fd_src < 0) {
+		printf("Can't open file %s (%s)\n", src, strerror(errno));
+		goto out;
+	}
+
+	fd_dst = open(dst, O_WRONLY | O_CREAT, 0666);
+	if (fd_dst < 0) {
+		printf("Can't open file %s (%s)\n", dst, strerror(errno));
+		goto out;
+	}
+
+	buf = calloc(1, 512);
+	if (!buf) {
+		printf("Can't allocate buffer to copy file\n");
+		goto out;
+	}
+
+	while (1) {
+		size = read(fd_src, buf, 512);
+		if (size < 0) {
+			printf("Can't read file %s\n", src);
+			goto out;
+		}
+		if (!size)
+			break;
+
+		count = size;
+		size = write(fd_dst, buf, count);
+		if (size < 0) {
+			printf("Can't write file %s\n", dst);
+			goto out;
+		}
+	}
+
+	ret = 0;
+
+ out:
+	if (fd_src >= 0)
+		close(fd_src);
+	if (fd_dst >= 0)
+		close(fd_dst);
+	if (buf)
+		free(buf);
+
+	return ret;
+}
diff --git a/tools/fit_common.h b/tools/fit_common.h
index 0e8ee79115..872d8afa17 100644
--- a/tools/fit_common.h
+++ b/tools/fit_common.h
@@ -39,4 +39,15 @@ int mmap_fdt(const char *cmdname, const char *fname, size_t size_inc,
 	     void **blobp, struct stat *sbuf, bool delete_on_error,
 	     bool read_only);
 
+/**
+ * copyfile() - Copy a file
+ *
+ * This uses read()/write() to copy file @src to file @dst
+ *
+ * @src: Filename to read from
+ * @dst: Filename to write to
+ * @return 0 if OK, -1 on error
+ */
+int copyfile(const char *src, const char *dst);
+
 #endif /* _FIT_COMMON_H_ */
diff --git a/tools/fit_image.c b/tools/fit_image.c
index 9ac525623b..0e31f7dca6 100644
--- a/tools/fit_image.c
+++ b/tools/fit_image.c
@@ -656,62 +656,6 @@ err:
 	return ret;
 }
 
-static int copyfile(const char *src, const char *dst)
-{
-	int fd_src = -1, fd_dst = -1;
-	void *buf = NULL;
-	ssize_t size;
-	size_t count;
-	int ret = -1;
-
-	fd_src = open(src, O_RDONLY);
-	if (fd_src < 0) {
-		printf("Can't open file %s (%s)\n", src, strerror(errno));
-		goto out;
-	}
-
-	fd_dst = open(dst, O_WRONLY | O_CREAT, 0666);
-	if (fd_dst < 0) {
-		printf("Can't open file %s (%s)\n", dst, strerror(errno));
-		goto out;
-	}
-
-	buf = calloc(1, 512);
-	if (!buf) {
-		printf("Can't allocate buffer to copy file\n");
-		goto out;
-	}
-
-	while (1) {
-		size = read(fd_src, buf, 512);
-		if (size < 0) {
-			printf("Can't read file %s\n", src);
-			goto out;
-		}
-		if (!size)
-			break;
-
-		count = size;
-		size = write(fd_dst, buf, count);
-		if (size < 0) {
-			printf("Can't write file %s\n", dst);
-			goto out;
-		}
-	}
-
-	ret = 0;
-
- out:
-	if (fd_src >= 0)
-		close(fd_src);
-	if (fd_dst >= 0)
-		close(fd_dst);
-	if (buf)
-		free(buf);
-
-	return ret;
-}
-
 /**
  * fit_handle_file - main FIT file processing function
  *