perf sort: Make setup_sorting returns an error code

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>

7 files changed, 18 insertions, 10 deletions

diff --git a/tools/perf/builtin-annotate.c b/tools/perf/builtin-annotate.c
index dc870cf31b79..95a2ad3f043e 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 4af0b580b046..d207a97a2db1 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 91555d4885f4..96b5a7fee4bb 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 f561757b1bfa..72f6eb7b4173 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 0afd9223bde7..1be64a6c5daf 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 03cabe5678d0..d8b48827a17e 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 e994ad3e9897..b13e56f6ccbe 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);