[tip:perf/core] perf help: Introduce exec_failed() to avoid code duplication

From: tip-bot for Arnaldo Carvalho de Melo
Date: Sat Jul 01 2017 - 04:49:00 EST


Commit-ID: 881c362d34ef76600b859e3a034d4155139bad2c
Gitweb: http://git.kernel.org/tip/881c362d34ef76600b859e3a034d4155139bad2c
Author: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
AuthorDate: Tue, 27 Jun 2017 10:52:57 -0300
Committer: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitDate: Tue, 27 Jun 2017 10:52:57 -0300

perf help: Introduce exec_failed() to avoid code duplication

The warning(str_error_r(errno)) pattern can be replaced with a function,
do it.

And while at it use pr_warning(), we have way too many error reporting
facilities, time to drop some, starting with the one we got from the git
sources.

Cc: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Cc: David Ahern <dsahern@xxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Wang Nan <wangnan0@xxxxxxxxxx>
Link: http://lkml.kernel.org/n/tip-lbak5npj1ri1uuvf1en3c0p0@xxxxxxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
tools/perf/builtin-help.c | 22 +++++++++-------------
1 file changed, 9 insertions(+), 13 deletions(-)

diff --git a/tools/perf/builtin-help.c b/tools/perf/builtin-help.c
index 492f8e1..e82fa0d 100644
--- a/tools/perf/builtin-help.c
+++ b/tools/perf/builtin-help.c
@@ -108,10 +108,14 @@ out:
return ret;
}

-static void exec_woman_emacs(const char *path, const char *page)
+static void exec_failed(const char *cmd)
{
char sbuf[STRERR_BUFSIZE];
+ pr_warning("failed to exec '%s': %s", cmd, str_error_r(errno, sbuf, sizeof(sbuf)));
+}

+static void exec_woman_emacs(const char *path, const char *page)
+{
if (!check_emacsclient_version()) {
/* This works only with emacsclient version >= 22. */
char *man_page;
@@ -122,8 +126,7 @@ static void exec_woman_emacs(const char *path, const char *page)
execlp(path, "emacsclient", "-e", man_page, NULL);
free(man_page);
}
- warning("failed to exec '%s': %s", path,
- str_error_r(errno, sbuf, sizeof(sbuf)));
+ exec_failed(path);
}
}

@@ -134,7 +137,6 @@ static void exec_man_konqueror(const char *path, const char *page)
if (display && *display) {
char *man_page;
const char *filename = "kfmclient";
- char sbuf[STRERR_BUFSIZE];

/* It's simpler to launch konqueror using kfmclient. */
if (path) {
@@ -155,33 +157,27 @@ static void exec_man_konqueror(const char *path, const char *page)
execlp(path, filename, "newTab", man_page, NULL);
free(man_page);
}
- warning("failed to exec '%s': %s", path,
- str_error_r(errno, sbuf, sizeof(sbuf)));
+ exec_failed(path);
}
}

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,
- str_error_r(errno, sbuf, sizeof(sbuf)));
+ exec_failed(path);
}

static void exec_man_cmd(const char *cmd, const char *page)
{
- char sbuf[STRERR_BUFSIZE];
char *shell_cmd;

if (asprintf(&shell_cmd, "%s %s", cmd, page) > 0) {
execl("/bin/sh", "sh", "-c", shell_cmd, NULL);
free(shell_cmd);
}
- warning("failed to exec '%s': %s", cmd,
- str_error_r(errno, sbuf, sizeof(sbuf)));
+ exec_failed(cmd);
}

static void add_man_viewer(const char *name)