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From ce90f916fee2a39eb914f8b6b349adb76d100f75 Mon Sep 17 00:00:00 2001
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From: Sebastien GODARD <sysstat@users.noreply.github.com>
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Date: Sat, 13 Apr 2019 18:44:29 +0200
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Subject: [PATCH] sadf: Fix seg fault on empty data files
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Trying to display XML or JSON data (with sadf -x/-j) from a data file
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containing only RESTART records created a core dump.
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This patch fixes that.
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Signed-off-by: Sebastien GODARD <sysstat@users.noreply.github.com>
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---
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 sadf.c | 7 ++++---
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 1 file changed, 4 insertions(+), 3 deletions(-)
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diff --git a/sadf.c b/sadf.c
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index 2d2c39c..5d558d3 100644
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--- a/sadf.c
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+++ b/sadf.c
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@@ -963,14 +963,15 @@ void logic1_display_loop(int ifd, struct file_activity *file_actlst, char *file,
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 			(tm_start.use && (datecmp(loctime, &tm_start) < 0)) ||
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 			(tm_end.use && (datecmp(loctime, &tm_end) >= 0))));
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-		/* Save the first stats collected. Used for example in next_slice() function */
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-		copy_structures(act, id_seq, record_hdr, 2, 0);
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-
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 		curr = 1;
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 		cnt = count;
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 		reset = TRUE;
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 		if (!eosaf) {
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+
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+		        /* Save the first stats collected. Used for example in next_slice() function */
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+		        copy_structures(act, id_seq, record_hdr, 2, 0);
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+
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 			do {
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 				eosaf = read_next_sample(ifd, IGNORE_COMMENT | IGNORE_RESTART, curr,
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 							 file, &rtype, tab, file_magic, file_actlst,
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-- 
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2.31.1
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