From: lilydjwg <lilydjwg@gmail.com>
To: Daniel Shahaf <d.s@daniel.shahaf.name>
Cc: zsh-users@zsh.org
Subject: Re: No fsync on history file? I lost my history
Date: Sun, 23 Sep 2018 22:22:55 +0800 [thread overview]
Message-ID: <20180923142255.GA4931@lilyforest.localdomain> (raw)
In-Reply-To: <1537709747.103981.1517680056.72C7A43E@webmail.messagingengine.com>
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On Sun, Sep 23, 2018 at 01:35:47PM +0000, Daniel Shahaf wrote:
> lilydjwg wrote on Sun, 23 Sep 2018 16:52 +0800:
> > Would you add the fsync call or make an option for that?
>
> I'd be happy to accept patches for this.
Here it is. I've checked that it works on my Linux system, but not sure
about other systems.
--
Best regards,
lilydjwg
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From 78b1df1329b2c7bb2b6e78e5b7d70be4bbf103e2 Mon Sep 17 00:00:00 2001
From: lilydjwg <lilydjwg@gmail.com>
Date: Sun, 23 Sep 2018 22:12:56 +0800
Subject: [PATCH] Call fsync after writing out new histfile
to ensure the data is on disk before the rename in case of a system crash.
---
Src/hist.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/Src/hist.c b/Src/hist.c
index dbdc1e4e5..e128e9f14 100644
--- a/Src/hist.c
+++ b/Src/hist.c
@@ -2933,6 +2933,9 @@ savehistfile(char *fn, int err, int writeflags)
lasthist.text = ztrdup(start);
}
}
+ fflush(out); /* need to flush before fsync */
+ if (fsync(fileno(out)) < 0 && ret >= 0)
+ ret = -1;
if (fclose(out) < 0 && ret >= 0)
ret = -1;
if (ret >= 0) {
--
2.19.0
next prev parent reply other threads:[~2018-09-23 14:23 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-23 8:52 lilydjwg
2018-09-23 13:35 ` Daniel Shahaf
2018-09-23 14:22 ` lilydjwg [this message]
2018-09-23 14:46 ` Daniel Shahaf
2018-09-23 15:25 ` lilydjwg
2018-09-23 15:45 ` Daniel Shahaf
2018-09-23 19:40 ` Vincent Lefevre
2018-09-24 3:03 ` lilydjwg
2018-09-23 18:02 ` Mikael Magnusson
2018-09-24 3:04 ` lilydjwg
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