[PATCH 02/25] wrapper.c: remove/unlink_or_warn: simplify, treat ENOENT as success

[Jonathan Nieder <jrnieder@gmail.com>]

From: Ronnie Sahlberg <sahlberg@google.com>
Date: Wed, 16 Jul 2014 11:01:18 -0700

Simplify the function warn_if_unremovable slightly. Additionally, change
behaviour slightly. If we failed to remove the object because the object
does not exist, we can still return success back to the caller since none of
the callers depend on "fail if the file did not exist".

Signed-off-by: Ronnie Sahlberg <sahlberg@google.com>
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
---
 git-compat-util.h |  7 +++++--
 refs.c            |  2 +-
 wrapper.c         | 14 ++++++--------
 3 files changed, 12 insertions(+), 11 deletions(-)

diff --git a/git-compat-util.h b/git-compat-util.h
index fb41118..d67592f 100644
--- a/git-compat-util.h
+++ b/git-compat-util.h
@@ -777,11 +777,14 @@ void git_qsort(void *base, size_t nmemb, size_t size,
 
 /*
  * Preserves errno, prints a message, but gives no warning for ENOENT.
- * Always returns the return value of unlink(2).
+ * Returns 0 on success, which includes trying to unlink an object that does
+ * not exist.
  */
 int unlink_or_warn(const char *path);
 /*
- * Likewise for rmdir(2).
+ * Preserves errno, prints a message, but gives no warning for ENOENT.
+ * Returns 0 on success, which includes trying to remove a directory that does
+ * not exist.
  */
 int rmdir_or_warn(const char *path);
 /*
diff --git a/refs.c b/refs.c
index a77458f..2dcf6c6 100644
--- a/refs.c
+++ b/refs.c
@@ -2607,7 +2607,7 @@ static int delete_ref_loose(struct ref_lock *lock, int flag)
 		char *loose_filename = get_locked_file_path(lock->lk);
 		int err = unlink_or_warn(loose_filename);
 		free(loose_filename);
-		if (err && errno != ENOENT)
+		if (err)
 			return 1;
 	}
 	return 0;
diff --git a/wrapper.c b/wrapper.c
index 5b77d2a..8d4be66 100644
--- a/wrapper.c
+++ b/wrapper.c
@@ -466,14 +466,12 @@ int xmkstemp_mode(char *template, int mode)
 
 static int warn_if_unremovable(const char *op, const char *file, int rc)
 {
-	if (rc < 0) {
-		int err = errno;
-		if (ENOENT != err) {
-			warning("unable to %s %s: %s",
-				op, file, strerror(errno));
-			errno = err;
-		}
-	}
+	int err;
+	if (!rc || errno == ENOENT)
+		return 0;
+	err = errno;
+	warning("unable to %s %s: %s", op, file, strerror(errno));
+	errno = err;
 	return rc;
 }
 
-- 
2.1.0.rc2.206.gedb03e5