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From: Michael Haggerty <mhagger@alum.mit.edu>
To: Junio C Hamano <gitster@pobox.com>
Cc: git@vger.kernel.org, Jeff King <peff@peff.net>,
	David Turner <novalis@novalis.org>,
	Jacob Keller <jacob.keller@gmail.com>,
	Philip Oakley <philipoakley@iee.org>,
	Michael Haggerty <mhagger@alum.mit.edu>
Subject: [PATCH v4 04/23] safe_create_leading_directories_const(): preserve errno
Date: Fri,  6 Jan 2017 17:22:24 +0100	[thread overview]
Message-ID: <964bc414e7e96642aacb248e06912befab2724cc.1483719289.git.mhagger@alum.mit.edu> (raw)
In-Reply-To: <cover.1483719289.git.mhagger@alum.mit.edu>

Some implementations of free() change errno (even thought they
shouldn't):

  https://sourceware.org/bugzilla/show_bug.cgi?id=17924

So preserve the errno from safe_create_leading_directories() across the
call to free().

Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
---
 sha1_file.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/sha1_file.c b/sha1_file.c
index 1173071..10395e7 100644
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -166,10 +166,14 @@ enum scld_error safe_create_leading_directories(char *path)
 
 enum scld_error safe_create_leading_directories_const(const char *path)
 {
+	int save_errno;
 	/* path points to cache entries, so xstrdup before messing with it */
 	char *buf = xstrdup(path);
 	enum scld_error result = safe_create_leading_directories(buf);
+
+	save_errno = errno;
 	free(buf);
+	errno = save_errno;
 	return result;
 }
 
-- 
2.9.3


  parent reply	other threads:[~2017-01-06 16:23 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-01-06 16:22 [PATCH v4 00/23] Delete directories left empty after ref deletion Michael Haggerty
2017-01-06 16:22 ` [PATCH v4 01/23] files_rename_ref(): tidy up whitespace Michael Haggerty
2017-01-06 16:22 ` [PATCH v4 02/23] refname_is_safe(): correct docstring Michael Haggerty
2017-01-06 16:22 ` [PATCH v4 03/23] t5505: use "for-each-ref" to test for the non-existence of references Michael Haggerty
2017-01-06 16:22 ` Michael Haggerty [this message]
2017-01-06 16:22 ` [PATCH v4 05/23] safe_create_leading_directories(): set errno on SCLD_EXISTS Michael Haggerty
2017-01-06 16:22 ` [PATCH v4 06/23] raceproof_create_file(): new function Michael Haggerty
2017-01-06 16:22 ` [PATCH v4 07/23] lock_ref_sha1_basic(): inline constant Michael Haggerty
2017-01-06 16:22 ` [PATCH v4 08/23] lock_ref_sha1_basic(): use raceproof_create_file() Michael Haggerty
2017-01-06 16:22 ` [PATCH v4 09/23] rename_tmp_log(): " Michael Haggerty
2017-01-06 16:22 ` [PATCH v4 10/23] rename_tmp_log(): improve error reporting Michael Haggerty
2017-01-06 16:22 ` [PATCH v4 11/23] log_ref_write(): inline function Michael Haggerty
2017-01-06 16:22 ` [PATCH v4 12/23] log_ref_setup(): separate code for create vs non-create Michael Haggerty
2017-01-06 16:22 ` [PATCH v4 13/23] log_ref_setup(): improve robustness against races Michael Haggerty
2017-01-06 16:22 ` [PATCH v4 14/23] log_ref_setup(): pass the open file descriptor back to the caller Michael Haggerty
2017-01-06 16:22 ` [PATCH v4 15/23] log_ref_write_1(): don't depend on logfile argument Michael Haggerty
2017-01-06 16:22 ` [PATCH v4 16/23] log_ref_setup(): manage the name of the reflog file internally Michael Haggerty
2017-01-06 16:22 ` [PATCH v4 17/23] log_ref_write_1(): inline function Michael Haggerty
2017-01-06 16:22 ` [PATCH v4 18/23] delete_ref_loose(): derive loose reference path from lock Michael Haggerty
2017-01-06 16:22 ` [PATCH v4 19/23] delete_ref_loose(): inline function Michael Haggerty
2017-01-06 16:22 ` [PATCH v4 20/23] try_remove_empty_parents(): rename parameter "name" -> "refname" Michael Haggerty
2017-01-06 16:22 ` [PATCH v4 21/23] try_remove_empty_parents(): don't trash argument contents Michael Haggerty
2017-01-06 16:22 ` [PATCH v4 22/23] try_remove_empty_parents(): teach to remove parents of reflogs, too Michael Haggerty
2017-01-06 16:22 ` [PATCH v4 23/23] files_transaction_commit(): clean up empty directories Michael Haggerty
2017-01-06 19:44 ` [PATCH v4 00/23] Delete directories left empty after ref deletion Jeff King

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