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authorIngo Molnar <mingo@elte.hu>2009-06-07 17:58:23 +0200
committerIngo Molnar <mingo@elte.hu>2009-06-07 17:58:23 +0200
commita14832ff977e78d1982cdf78cdabb1f2320d9ac8 (patch)
tree84cb8282d4237f17d8c9ff50919947d1323f811c /tools
parent30c806a094493beb7691bc7957dfa02dee96230a (diff)
downloadlinux-a14832ff977e78d1982cdf78cdabb1f2320d9ac8.tar.gz
perf report: Print more expressive message in case of file open error
Before: $ perf report failed to open file: No such file or directory After: $ perf report failed to open file: perf.data (try 'perf record' first) Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'tools')
-rw-r--r--tools/perf/builtin-report.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 242e09ff365..f053a7463dc 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -1120,7 +1120,10 @@ static int __cmd_report(void)
input = open(input_name, O_RDONLY);
if (input < 0) {
- perror("failed to open file");
+ fprintf(stderr, " failed to open file: %s", input_name);
+ if (!strcmp(input_name, "perf.data"))
+ fprintf(stderr, " (try 'perf record' first)");
+ fprintf(stderr, "\n");
exit(-1);
}