add function fc_check_rename_ex

HISTORY

@@ -1,11 +1,12 @@
 
-Version 1.56  2022-02-25
+Version 1.56  2022-03-09
   * add function fc_gettid
   * function normalize_path: NULL from parameter for getcwd
   * sockopt.[hc] support tcpwritev and tcpreadv
   * add function fc_iov_get_bytes
   * rename hash_xxx to fc_hash_xxx
   * rename trim to fc_trim
+  * add function fc_check_rename_ex
 
 Version 1.55  2022-01-12
   * fastcommon php extension adapt to php 8

make.sh

@@ -203,12 +203,12 @@ done
 
 if [ -n "$pthread_path" ]; then
   LIBS="$LIBS -lpthread"
-  line=$(nm $pthread_path | fgrep pthread_rwlockattr_setkind_np | fgrep -w T)
+  line=$(nm $pthread_path 2>/dev/null | fgrep pthread_rwlockattr_setkind_np | fgrep -w T)
   if [ -n "$line" ]; then
     CFLAGS="$CFLAGS -DWITH_PTHREAD_RWLOCKATTR_SETKIND_NP=1"
   fi
 elif [ -f /usr/lib/libc_r.so ]; then
-  line=$(nm -D /usr/lib/libc_r.so | grep pthread_create | grep -w T)
+  line=$(nm -D /usr/lib/libc_r.so 2>/dev/null | grep pthread_create | grep -w T)
   if [ -n "$line" ]; then
     LIBS="$LIBS -lc_r"
   fi

src/shared_func.c

@@ -1369,10 +1369,10 @@ int safeWriteToFile(const char *filename, const char *buff, \
 	if (rename(tmpFilename, filename) != 0)
 	{
 		result = errno != 0 ? errno : EIO;
-		logError("file: "__FILE__", line: %d, " \
+		logError("file: "__FILE__", line: %d, "
-			"rename file \"%s\" to \"%s\" fail, " \
+			"rename file \"%s\" to \"%s\" fail, "
-			"errno: %d, error info: %s", \
+			"errno: %d, error info: %s",
-			__LINE__, tmpFilename, filename, \
+			__LINE__, tmpFilename, filename,
 			result, STRERROR(result));
 		return result;
 	}
@@ -3446,6 +3446,52 @@ int fc_mkdirs_ex(const char *path, const mode_t mode, int *create_count)
     return 0;
 }
 
+int fc_check_rename_ex(const char *oldpath, const char *newpath,
+        const bool overwritten)
+{
+    int result;
+
+    if (access(oldpath, F_OK) != 0) {
+        result = errno != 0 ? errno : EPERM;
+        if (result != ENOENT) {
+            logError("file: "__FILE__", line: %d, "
+                    "access %s fail, errno: %d, error info: %s",
+                    __LINE__, oldpath, result, STRERROR(result));
+            return result;
+        }
+        return 0;
+    }
+
+    if (!overwritten) {
+        if (access(newpath, F_OK) == 0) {
+            logError("file: "__FILE__", line: %d, "
+                    "dest path: %s already exist",
+                    __LINE__, newpath);
+            return EEXIST;
+        } else {
+            result = errno != 0 ? errno : EPERM;
+            if (result != ENOENT) {
+                logError("file: "__FILE__", line: %d, "
+                        "access %s fail, errno: %d, error info: %s",
+                        __LINE__, newpath, result, STRERROR(result));
+                return result;
+            }
+        }
+    }
+
+    if (rename(oldpath, newpath) != 0) {
+        result = errno != 0 ? errno : EIO;
+        logError("file: "__FILE__", line: %d, "
+                "rename file \"%s\" to \"%s\" fail, "
+                "errno: %d, error info: %s",
+                __LINE__, oldpath, newpath,
+                result, STRERROR(result));
+        return result;
+    }
+
+    return 0;
+}
+
 int fc_get_first_line(const char *filename, char *buff,
         const int buff_size, string_t *line)
 {

src/shared_func.h

@@ -1089,6 +1089,15 @@ static inline int fc_mkdirs(const char *path, const mode_t mode)
     return fc_mkdirs_ex(path, mode, &create_count);
 }
 
+int fc_check_rename_ex(const char *oldpath, const char *newpath,
+        const bool overwritten);
+
+static inline int fc_check_rename(const char *oldpath, const char *newpath)
+{
+    const bool overwritten = true;
+    return fc_check_rename_ex(oldpath, newpath, overwritten);
+}
+
 int fc_get_first_line(const char *filename, char *buff,
         const int buff_size, string_t *line);