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| author | He Kuang <hekuang@huawei.com> | 2016-08-04 11:25:42 +0000 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2016-08-15 13:17:10 -0300 |
| commit | 88ded4d8d94a550624e1827478e13fecf97a7b0a (patch) | |
| tree | ee7590ed37e990e74b1f5bf598075752498b0d21 | |
| parent | 49a7f01064a94c4fd6afb6b4f7e3ccc37d0edf99 (diff) | |
| download | linux-88ded4d8d94a550624e1827478e13fecf97a7b0a.tar.gz linux-88ded4d8d94a550624e1827478e13fecf97a7b0a.tar.bz2 linux-88ded4d8d94a550624e1827478e13fecf97a7b0a.zip | |
perf script: Show proper message when failed list scripts
Perf shows the usage message when perf scripts folder failed to open,
which misleads users to let them think the command is being mistyped.
This patch shows a proper message and guides users to check the
PERF_EXEC_PATH environment variable in that case.
Before:
$ perf script --list
Usage: perf script [<options>]
or: perf script [<options>] record <script> [<record-options>] <command>
or: perf script [<options>] report <script> [script-args]
or: perf script [<options>] <script> [<record-options>] <command>
or: perf script [<options>] <top-script> [script-args]
-l, --list list available scripts
After:
$ perf script --list
open(/home/user/perf-core/scripts) failed.
Check for "PERF_EXEC_PATH" env to set scripts dir.
Signed-off-by: He Kuang <hekuang@huawei.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1470309943-153909-1-git-send-email-hekuang@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| -rw-r--r-- | tools/perf/builtin-script.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c index 9c640a8081c7..45c51eb6cab4 100644 --- a/tools/perf/builtin-script.c +++ b/tools/perf/builtin-script.c @@ -1690,8 +1690,13 @@ static int list_available_scripts(const struct option *opt __maybe_unused, snprintf(scripts_path, MAXPATHLEN, "%s/scripts", get_argv_exec_path()); scripts_dir = opendir(scripts_path); - if (!scripts_dir) - return -1; + if (!scripts_dir) { + fprintf(stdout, + "open(%s) failed.\n" + "Check \"PERF_EXEC_PATH\" env to set scripts dir.\n", + scripts_path); + exit(-1); + } for_each_lang(scripts_path, scripts_dir, lang_dirent) { snprintf(lang_path, MAXPATHLEN, "%s/%s/bin", scripts_path, |