From: Arnaldo Carvalho de Melo <acme@redhat.com>
Date: Mon, 14 Dec 2009 22:09:30 +0000 (-0200)
Subject: perf record: Rename perf.data to perf.data.old if --force/-f is used
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=b38d34645cc52136b6c99623fef7ded26742e573;p=linux-beck.git

perf record: Rename perf.data to perf.data.old if --force/-f is used

Suggested-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
LKML-Reference: <1260828571-3613-2-git-send-email-acme@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---

diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index a66a58d52818..66979a5553b8 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -421,10 +421,19 @@ static int __cmd_record(int argc, const char **argv)
 	signal(SIGINT, sig_handler);
 
 	if (!stat(output_name, &st) && st.st_size) {
-		if (!force && !append_file) {
-			fprintf(stderr, "Error, output file %s exists, use -A to append or -f to overwrite.\n",
-					output_name);
-			exit(-1);
+		if (!force) {
+			if (!append_file) {
+				pr_err("Error, output file %s exists, use -A "
+				       "to append or -f to overwrite.\n",
+				       output_name);
+				exit(-1);
+			}
+		} else {
+			char oldname[PATH_MAX];
+			snprintf(oldname, sizeof(oldname), "%s.old",
+				 output_name);
+			unlink(oldname);
+			rename(output_name, oldname);
 		}
 	} else {
 		append_file = 0;