linux-kernel - [tip:perf/core] perf tools: Refactor the code to strip command name with {l,r}trim()

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Message-ID: <tip-bdd97ca63faa374c98314d53c0bcaedb473c5a33@git.kernel.org>
Date:   Tue, 11 Apr 2017 22:36:56 -0700
From:   tip-bot for Taeung Song <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     hpa@...or.com, dzickus@...hat.com, tglx@...utronix.de,
        wangnan0@...wei.com, mhiramat@...nel.org, acme@...hat.com,
        mingo@...nel.org, linux-kernel@...r.kernel.org,
        peterz@...radead.org, dsahern@...il.com, namhyung@...nel.org,
        jolsa@...nel.org, treeze.taeung@...il.com
Subject: [tip:perf/core] perf tools: Refactor the code to strip command name
 with {l,r}trim()

Commit-ID:  bdd97ca63faa374c98314d53c0bcaedb473c5a33
Gitweb:     http://git.kernel.org/tip/bdd97ca63faa374c98314d53c0bcaedb473c5a33
Author:     Taeung Song <treeze.taeung@...il.com>
AuthorDate: Fri, 7 Apr 2017 23:24:21 +0900
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Tue, 11 Apr 2017 15:23:26 -0300

perf tools: Refactor the code to strip command name with {l,r}trim()

After reading command name from /proc/<pid>/status, use ltrim() and
rtrim() to strip command name, not using just while loop, isspace() and
etc.

Signed-off-by: Taeung Song <treeze.taeung@...il.com>
Acked-by: David Ahern <dsahern@...il.com>
Cc: Don Zickus <dzickus@...hat.com>
Cc: Jiri Olsa <jolsa@...nel.org>
Cc: Masami Hiramatsu <mhiramat@...nel.org>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Wang Nan <wangnan0@...wei.com>
Link: http://lkml.kernel.org/r/1491575061-704-6-git-send-email-treeze.taeung@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/util/event.c | 11 ++---------
 1 file changed, 2 insertions(+), 9 deletions(-)

diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c
index 76b9c6b..8255a26 100644
--- a/tools/perf/util/event.c
+++ b/tools/perf/util/event.c
@@ -106,7 +106,7 @@ static int perf_event__get_comm_ids(pid_t pid, char *comm, size_t len,
 	int fd;
 	size_t size = 0;
 	ssize_t n;
-	char *nl, *name, *tgids, *ppids;
+	char *name, *tgids, *ppids;
 
 	*tgid = -1;
 	*ppid = -1;
@@ -134,14 +134,7 @@ static int perf_event__get_comm_ids(pid_t pid, char *comm, size_t len,
 
 	if (name) {
 		name += 5;  /* strlen("Name:") */
-
-		while (*name && isspace(*name))
-			++name;
-
-		nl = strchr(name, '\n');
-		if (nl)
-			*nl = '\0';
-
+		name = rtrim(ltrim(name));
 		size = strlen(name);
 		if (size >= len)
 			size = len - 1;