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| author | Masami Hiramatsu <mhiramat@kernel.org> | 2016-05-10 07:47:17 +0200 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2016-05-10 16:56:14 +0200 |
| commit | b72ca4039099e953f1ea2dbd58c201b14feb6605 (patch) | |
| tree | 4d40c9077dbabedd468a00a63627ae6769a8449f /tools/perf/builtin-help.c | |
| parent | perf probe: Check the return value of strbuf APIs (diff) | |
| download | linux-b72ca4039099e953f1ea2dbd58c201b14feb6605.tar.xz linux-b72ca4039099e953f1ea2dbd58c201b14feb6605.zip | |
perf help: Make check_emacsclient_version to check strbuf APIs
Make check_emacsclient_version() to check the return value of strbuf
APIs so that it can handle errors in strbuf.
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20160510054716.6158.11755.stgit@devbox
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/builtin-help.c')
| -rw-r--r-- | tools/perf/builtin-help.c | 18 |
1 files changed, 10 insertions, 8 deletions
diff --git a/tools/perf/builtin-help.c b/tools/perf/builtin-help.c index bc1de9b8fd67..f9830c902b78 100644 --- a/tools/perf/builtin-help.c +++ b/tools/perf/builtin-help.c @@ -61,6 +61,7 @@ static int check_emacsclient_version(void) struct child_process ec_process; const char *argv_ec[] = { "emacsclient", "--version", NULL }; int version; + int ret = -1; /* emacsclient prints its version number on stderr */ memset(&ec_process, 0, sizeof(ec_process)); @@ -71,7 +72,10 @@ static int check_emacsclient_version(void) fprintf(stderr, "Failed to start emacsclient.\n"); return -1; } - strbuf_read(&buffer, ec_process.err, 20); + if (strbuf_read(&buffer, ec_process.err, 20) < 0) { + fprintf(stderr, "Failed to read emacsclient version\n"); + goto out; + } close(ec_process.err); /* @@ -82,8 +86,7 @@ static int check_emacsclient_version(void) if (prefixcmp(buffer.buf, "emacsclient")) { fprintf(stderr, "Failed to parse emacsclient version.\n"); - strbuf_release(&buffer); - return -1; + goto out; } version = atoi(buffer.buf + strlen("emacsclient")); @@ -92,12 +95,11 @@ static int check_emacsclient_version(void) fprintf(stderr, "emacsclient version '%d' too old (< 22).\n", version); - strbuf_release(&buffer); - return -1; - } - + } else + ret = 0; +out: strbuf_release(&buffer); - return 0; + return ret; } static void exec_woman_emacs(const char *path, const char *page) |