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From e8b7619433a6d6e6ff8f106850a3f1d2808653fb Mon Sep 17 00:00:00 2001
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From: Brent Cook <bcook@openbsd.org>
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Date: Mon, 21 Dec 2015 05:53:20 -0600
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Subject: [PATCH 12/12] check result of ftello/ftruncate
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---
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src/usr.sbin/ntpd/ntpd.c | 7 +++++--
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1 file changed, 5 insertions(+), 2 deletions(-)
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diff --git a/src/usr.sbin/ntpd/ntpd.c b/src/usr.sbin/ntpd/ntpd.c
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index af8700e..631e4de 100644
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--- a/src/usr.sbin/ntpd/ntpd.c
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+++ b/src/usr.sbin/ntpd/ntpd.c
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@@ -598,6 +598,7 @@ writefreq(double d)
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{
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int r;
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static int warnonce = 1;
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+ int off;
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if (freqfp == NULL)
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return 0;
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@@ -611,8 +612,10 @@ writefreq(double d)
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clearerr(freqfp);
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return 0;
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}
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- ftruncate(fileno(freqfp), ftello(freqfp));
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- fsync(fileno(freqfp));
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+ off = ftello(freqfp);
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+ if (off == -1 || ftruncate(fileno(freqfp), off) == -1)
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+ log_warnx("can't truncate %s", DRIFTFILE);
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+ fsync(fileno(freqfp));
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return 1;
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}
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--
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2.7.0
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