X-Git-Url: https://mattmccutchen.net/rsync/rsync.git/blobdiff_plain/425094171007944fcfa37311dfae4be010e7c6a1..530adb762573d9f37be07eb38d0ffc7b5c401e6a:/util.c

diff --git a/util.c b/util.c
index 13ab38e3..cb47c2a1 100644
--- a/util.c
+++ b/util.c
@@ -353,18 +353,33 @@ int robust_unlink(char *fname)
 #endif
 }
 
-int robust_rename(char *from, char *to)
+/* Returns 0 on success, -1 on most errors, and -2 if we got an error
+ * trying to copy the file across file systems. */
+int robust_rename(char *from, char *to, int mode)
 {
-#ifndef ETXTBSY
-	return do_rename(from, to);
-#else
-	int rc = do_rename(from, to);
-	if (rc == 0 || errno != ETXTBSY)
-		return rc;
-	if (robust_unlink(to) != 0)
-		return -1;
-	return do_rename(from, to);
+	int tries = 4;
+
+	while (tries--) {
+		if (do_rename(from, to) == 0)
+			return 0;
+
+		switch (errno) {
+#ifdef ETXTBSY
+		case ETXTBSY:
+			if (robust_unlink(to) != 0)
+				return -1;
+			break;
 #endif
+		case EXDEV:
+			if (copy_file(from, to, mode) != 0)
+				return -2;
+			do_unlink(from);
+			return 0;
+		default:
+			return -1;
+		}
+	}
+	return -1;
 }
 
 
@@ -558,8 +573,8 @@ void strlower(char *s)
 
 /* Join strings p1 & p2 into "dest" with a guaranteed '/' between them.  (If
  * p1 ends with a '/', no extra '/' is inserted.)  Returns the length of both
- * strings + 1 (if '/' was inserted), regardless of whether the whole thing
- * fits into destsize (including the terminating '\0'). */
+ * strings + 1 (if '/' was inserted), regardless of whether the null-terminated
+ * string fits into destsize. */
 size_t pathjoin(char *dest, size_t destsize, const char *p1, const char *p2)
 {
 	size_t len = strlcpy(dest, p1, destsize);
@@ -579,9 +594,9 @@ size_t pathjoin(char *dest, size_t destsize, const char *p1, const char *p2)
 }
 
 /* Join any number of strings together, putting them in "dest".  The return
- * value is the length of all the strings, regardless of whether they fit in
- * destsize (including the terminating '\0').  Your list of string pointers
- * should end with a NULL to indicate the end of the list. */
+ * value is the length of all the strings, regardless of whether the null-
+ * terminated whole fits in destsize.  Your list of string pointers must end
+ * with a NULL to indicate the end of the list. */
 size_t stringjoin(char *dest, size_t destsize, ...)
 {
 	va_list ap;