From: Youngjae Cho <y0.cho@samsung.com>
Date: Wed, 26 Jul 2023 05:34:11 +0000 (+0900)
Subject: libcommon: Add syscommon_file_copy()
X-Git-Tag: accepted/tizen/unified/20230731.175325~3
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=619e6c365399e371a1a2b7ad84ed7964e370e17f;p=platform%2Fcore%2Fsystem%2Flibsyscommon.git

libcommon: Add syscommon_file_copy()

Change-Id: I00608e8a28b61026e19c1e73d4e0ed063c50379f
Signed-off-by: Youngjae Cho <y0.cho@samsung.com>
---

diff --git a/include/libsyscommon/file.h b/include/libsyscommon/file.h
index 5c038e6..b879874 100644
--- a/include/libsyscommon/file.h
+++ b/include/libsyscommon/file.h
@@ -24,6 +24,7 @@
 #define __LIBCOMMON_FILE_H__
 
 #include <stdarg.h>
+#include <stdbool.h>
 
 #ifdef __cplusplus
 extern "C" {
@@ -101,6 +102,18 @@ int sys_set_str(char *fname, char *val);
  */
 int syscommon_parse_cmdline_scanf(const char *format, ...);
 
+/**
+ * @brief Copy file
+ *
+ * @param[in] src Absolute path for a source file
+ * @param[in] dst Absolute path for a destination
+ * @param[in] overwrite If true, overwrite destination file if exist.
+ *                      If false, return -EEXIST if there is destination file.
+ *
+ * @return zero on success, otherwise negative error value
+ */
+int syscommon_file_copy(const char *src, const char *dst, bool overwrite);
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/src/libcommon/file.c b/src/libcommon/file.c
index 6c6cbaf..c632ef5 100644
--- a/src/libcommon/file.c
+++ b/src/libcommon/file.c
@@ -31,6 +31,14 @@
 
 #define SHARED_H_BUF_MAX 255
 
+static void close_fd(int *fd)
+{
+	if (*fd != -1)
+		close(*fd);
+}
+
+#define _cleanup_close_ __attribute__((__cleanup__(close_fd)))
+
 int sys_read_buf(char *file, char *buf, int len)
 {
 	int fd, r;
@@ -164,3 +172,41 @@ int syscommon_parse_cmdline_scanf(const char *format, ...)
 
 	return ret;
 }
+
+int syscommon_file_copy(const char *src, const char *dst, bool overwrite)
+{
+	_cleanup_close_ int rfd = -1;
+	_cleanup_close_ int wfd = -1;
+
+	char buf[1024] = { 0 ,};
+	ssize_t nread;
+	int r;
+
+	if (!src || !dst)
+		return -EINVAL;
+
+	if (!overwrite) {
+		r = access(dst, F_OK);
+		if (r == 0)
+			return -EALREADY;
+		else if (errno != ENOENT)
+			return -errno;
+	}
+
+	wfd = open(dst, O_CREAT | O_WRONLY | O_TRUNC, 0644);
+	if (wfd < 0)
+		return -errno;
+
+	rfd = open(src, O_RDONLY);
+	if (rfd < 0)
+		return -errno;
+
+	while ((nread = read(rfd, buf, 1024)) > 0)
+		if (write(wfd, buf, nread) != nread)
+			return -errno;
+
+	if (nread < 0)
+		return -errno;
+
+	return 0;
+}