[PATCH 06/17] perf sort: Make setup_sorting returns an error code

[Arnaldo Carvalho de Melo <acme@infradead.org>]

From: Namhyung Kim <namhyung.kim@lge.com>

Currently the setup_sorting() is called for parsing sort keys and exits
if it failed to add the sort key.  As it's included in libperf it'd be
better returning an error code rather than exiting application inside of
the library.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Suggested-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1360130237-9963-2-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/builtin-annotate.c |  3 ++-
 tools/perf/builtin-diff.c     |  4 +++-
 tools/perf/builtin-report.c   |  3 ++-
 tools/perf/builtin-top.c      |  3 ++-
 tools/perf/tests/hists_link.c |  3 ++-
 tools/perf/util/sort.c        | 10 ++++++----
 tools/perf/util/sort.h        |  2 +-
 7 files changed, 18 insertions(+), 10 deletions(-)

diff --git a/tools/perf/builtin-annotate.c b/tools/perf/builtin-annotate.c
index dc870cf..95a2ad3 100644
--- a/tools/perf/builtin-annotate.c
+++ b/tools/perf/builtin-annotate.c
@@ -309,7 +309,8 @@ int cmd_annotate(int argc, const char **argv, const char *prefix __maybe_unused)
 	if (symbol__init() < 0)
 		return -1;
 
-	setup_sorting(annotate_usage, options);
+	if (setup_sorting() < 0)
+		usage_with_options(annotate_usage, options);
 
 	if (argc) {
 		/*
diff --git a/tools/perf/builtin-diff.c b/tools/perf/builtin-diff.c
index 4af0b58..d207a97 100644
--- a/tools/perf/builtin-diff.c
+++ b/tools/perf/builtin-diff.c
@@ -605,7 +605,9 @@ int cmd_diff(int argc, const char **argv, const char *prefix __maybe_unused)
 
 	ui_init();
 
-	setup_sorting(diff_usage, options);
+	if (setup_sorting() < 0)
+		usage_with_options(diff_usage, options);
+
 	setup_pager();
 
 	sort_entry__setup_elide(&sort_dso, symbol_conf.dso_list, "dso", NULL);
diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 91555d4..96b5a7f 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -751,7 +751,8 @@ repeat:
 
 	}
 
-	setup_sorting(report_usage, options);
+	if (setup_sorting() < 0)
+		usage_with_options(report_usage, options);
 
 	/*
 	 * Only in the newt browser we are doing integrated annotation,
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index f561757..72f6eb7 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -1129,7 +1129,8 @@ int cmd_top(int argc, const char **argv, const char *prefix __maybe_unused)
 	if (sort_order == default_sort_order)
 		sort_order = "dso,symbol";
 
-	setup_sorting(top_usage, options);
+	if (setup_sorting() < 0)
+		usage_with_options(top_usage, options);
 
 	if (top.use_stdio)
 		use_browser = 0;
diff --git a/tools/perf/tests/hists_link.c b/tools/perf/tests/hists_link.c
index 0afd922..1be64a6 100644
--- a/tools/perf/tests/hists_link.c
+++ b/tools/perf/tests/hists_link.c
@@ -449,7 +449,8 @@ int test__hists_link(void)
 		goto out;
 
 	/* default sort order (comm,dso,sym) will be used */
-	setup_sorting(NULL, NULL);
+	if (setup_sorting() < 0)
+		goto out;
 
 	machines__init(&machines);
 
diff --git a/tools/perf/util/sort.c b/tools/perf/util/sort.c
index 03cabe5..d8b4882 100644
--- a/tools/perf/util/sort.c
+++ b/tools/perf/util/sort.c
@@ -565,23 +565,25 @@ int sort_dimension__add(const char *tok)
 	return -ESRCH;
 }
 
-void setup_sorting(const char * const usagestr[], const struct option *opts)
+int setup_sorting(void)
 {
 	char *tmp, *tok, *str = strdup(sort_order);
+	int ret = 0;
 
 	for (tok = strtok_r(str, ", ", &tmp);
 			tok; tok = strtok_r(NULL, ", ", &tmp)) {
-		int ret = sort_dimension__add(tok);
+		ret = sort_dimension__add(tok);
 		if (ret == -EINVAL) {
 			error("Invalid --sort key: `%s'", tok);
-			usage_with_options(usagestr, opts);
+			break;
 		} else if (ret == -ESRCH) {
 			error("Unknown --sort key: `%s'", tok);
-			usage_with_options(usagestr, opts);
+			break;
 		}
 	}
 
 	free(str);
+	return ret;
 }
 
 void sort_entry__setup_elide(struct sort_entry *self, struct strlist *list,
diff --git a/tools/perf/util/sort.h b/tools/perf/util/sort.h
index e994ad3e..b13e56f6 100644
--- a/tools/perf/util/sort.h
+++ b/tools/perf/util/sort.h
@@ -160,7 +160,7 @@ struct sort_entry {
 extern struct sort_entry sort_thread;
 extern struct list_head hist_entry__sort_list;
 
-void setup_sorting(const char * const usagestr[], const struct option *opts);
+int setup_sorting(void);
 extern int sort_dimension__add(const char *);
 void sort_entry__setup_elide(struct sort_entry *self, struct strlist *list,
 			     const char *list_name, FILE *fp);
-- 
1.8.1.1.361.gec3ae6e