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Subject[tip:perf/core] perf help: Use strerror_r instead of strerror
Commit-ID:  ede395d27c60c06a2173e7a9c0f4a929a1fef73e
Gitweb: http://git.kernel.org/tip/ede395d27c60c06a2173e7a9c0f4a929a1fef73e
Author: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
AuthorDate: Thu, 14 Aug 2014 02:22:53 +0000
Committer: Arnaldo Carvalho de Melo <acme@redhat.com>
CommitDate: Fri, 15 Aug 2014 13:08:26 -0300

perf help: Use strerror_r instead of strerror

Use strerror_r instead of strerror in error messages for thread-safety.

Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Naohiro Aota <naota@elisp.net>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/20140814022253.3545.82136.stgit@kbuild-fedora.novalocal
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/builtin-help.c | 20 ++++++++++++++++----
1 file changed, 16 insertions(+), 4 deletions(-)

diff --git a/tools/perf/builtin-help.c b/tools/perf/builtin-help.c
index 0384d93..25d2062 100644
--- a/tools/perf/builtin-help.c
+++ b/tools/perf/builtin-help.c
@@ -103,6 +103,8 @@ static int check_emacsclient_version(void)

static void exec_woman_emacs(const char *path, const char *page)
{
+ char sbuf[STRERR_BUFSIZE];
+
if (!check_emacsclient_version()) {
/* This works only with emacsclient version >= 22. */
struct strbuf man_page = STRBUF_INIT;
@@ -111,16 +113,19 @@ static void exec_woman_emacs(const char *path, const char *page)
path = "emacsclient";
strbuf_addf(&man_page, "(woman \"%s\")", page);
execlp(path, "emacsclient", "-e", man_page.buf, NULL);
- warning("failed to exec '%s': %s", path, strerror(errno));
+ warning("failed to exec '%s': %s", path,
+ strerror_r(errno, sbuf, sizeof(sbuf)));
}
}

static void exec_man_konqueror(const char *path, const char *page)
{
const char *display = getenv("DISPLAY");
+
if (display && *display) {
struct strbuf man_page = STRBUF_INIT;
const char *filename = "kfmclient";
+ char sbuf[STRERR_BUFSIZE];

/* It's simpler to launch konqueror using kfmclient. */
if (path) {
@@ -139,24 +144,31 @@ static void exec_man_konqueror(const char *path, const char *page)
path = "kfmclient";
strbuf_addf(&man_page, "man:%s(1)", page);
execlp(path, filename, "newTab", man_page.buf, NULL);
- warning("failed to exec '%s': %s", path, strerror(errno));
+ warning("failed to exec '%s': %s", path,
+ strerror_r(errno, sbuf, sizeof(sbuf)));
}
}

static void exec_man_man(const char *path, const char *page)
{
+ char sbuf[STRERR_BUFSIZE];
+
if (!path)
path = "man";
execlp(path, "man", page, NULL);
- warning("failed to exec '%s': %s", path, strerror(errno));
+ warning("failed to exec '%s': %s", path,
+ strerror_r(errno, sbuf, sizeof(sbuf)));
}

static void exec_man_cmd(const char *cmd, const char *page)
{
struct strbuf shell_cmd = STRBUF_INIT;
+ char sbuf[STRERR_BUFSIZE];
+
strbuf_addf(&shell_cmd, "%s %s", cmd, page);
execl("/bin/sh", "sh", "-c", shell_cmd.buf, NULL);
- warning("failed to exec '%s': %s", cmd, strerror(errno));
+ warning("failed to exec '%s': %s", cmd,
+ strerror_r(errno, sbuf, sizeof(sbuf)));
}

static void add_man_viewer(const char *name)

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