diff options
| author | Namhyung Kim <namhyung.kim@lge.com> | 2012-05-07 14:09:02 +0900 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2012-05-07 17:30:21 -0300 |
| commit | 16ad2ffb822cd28e2330284a60fdfec8bb90bbb0 (patch) | |
| tree | 4455824202a98540493d75dc5333f77cb42b59ba /tools/perf/builtin-top.c | |
| parent | dfe78adaaca90417ece98edbd3eb1c9661334406 (diff) | |
perf tools: Introduce perf_target__strerror()
The perf_target__strerror() sets @buf to a string that describes the
(perf_target-specific) error condition that is passed via @errnum.
This is similar to strerror_r() and does same thing if @errnum has a
standard errno value.
Signed-off-by: Namhyung Kim <namhyung.kim@lge.com>
Suggested-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Reviewed-by: David Ahern <dsahern@gmail.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1336367344-28071-6-git-send-email-namhyung.kim@lge.com
[ committer note: No need to use PERF_ERRNO_TARGET__SUCCESS, use shorter idiom ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/builtin-top.c')
| -rw-r--r-- | tools/perf/builtin-top.c | 19 |
1 files changed, 16 insertions, 3 deletions
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c index c9137ba580d..7ba0f03c013 100644 --- a/tools/perf/builtin-top.c +++ b/tools/perf/builtin-top.c @@ -1150,7 +1150,8 @@ static const char * const top_usage[] = { int cmd_top(int argc, const char **argv, const char *prefix __used) { struct perf_evsel *pos; - int status = -ENOMEM; + int status; + char errbuf[BUFSIZ]; struct perf_top top = { .count_filter = 5, .delay_secs = 2, @@ -1252,10 +1253,22 @@ int cmd_top(int argc, const char **argv, const char *prefix __used) setup_browser(false); - perf_target__validate(&top.target); + status = perf_target__validate(&top.target); + if (status) { + perf_target__strerror(&top.target, status, errbuf, BUFSIZ); + ui__warning("%s", errbuf); + } + + status = perf_target__parse_uid(&top.target); + if (status) { + int saved_errno = errno; - if (perf_target__parse_uid(&top.target) < 0) + perf_target__strerror(&top.target, status, errbuf, BUFSIZ); + ui__warning("%s", errbuf); + + status = -saved_errno; goto out_delete_evlist; + } if (top.target.tid == 0 && top.target.pid == 0 && top.target.uid_str == NULL) |