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Date: Wed, 14 Oct 2015 22:40:07 +0530
From: Sriram Raghunathan <sriram.r@...ia.com>
To: a.p.zijlstra@...llo.nl, paulus@...ba.org, acme@...nel.org,
yunlong.song@...wei.com
Cc: mingo@...hat.com, artagnon@...il.com, hemant@...ux.vnet.ibm.com,
jolsa@...nel.org, dsahern@...il.com, sriram.r@...ia.com,
linux-kernel@...r.kernel.org
Subject: [PATCH 1/1] perf :redirection of usage strings to stdout
This patch is to redirect the usage/builtin help strings
to stdout rather than stderr. This is follows the patter
similar to that of some of the coreutils (ls, rm).
This patch originated from the discussion on a mail loop
about the inconsistency usage of stdout/stderr usage.
Tested the piece of code below with
# perf stat -h > /tmp/foo 2>> /tmp/bar
# perf --help > /tmp/foo 2>&1 /tmp/bar
Signed-off-by: Sriram Raghunathan <sriram.r@...ia.com>
---
tools/perf/util/parse-options.c | 54 ++++++++++++++++++++---------------------
1 file changed, 27 insertions(+), 27 deletions(-)
diff --git a/tools/perf/util/parse-options.c b/tools/perf/util/parse-options.c
index 01626be..c81b2e3 100644
--- a/tools/perf/util/parse-options.c
+++ b/tools/perf/util/parse-options.c
@@ -563,9 +563,9 @@ static void print_option_help(const struct option *opts, int full)
int pad;
if (opts->type == OPTION_GROUP) {
- fputc('\n', stderr);
+ fputc('\n', stdout);
if (*opts->help)
- fprintf(stderr, "%s\n", opts->help);
+ fprintf(stdout, "%s\n", opts->help);
return;
}
if (!full && (opts->flags & PARSE_OPT_HIDDEN))
@@ -573,16 +573,16 @@ static void print_option_help(const struct option *opts, int full)
if (opts->flags & PARSE_OPT_DISABLED)
return;
- pos = fprintf(stderr, " ");
+ pos = fprintf(stdout, " ");
if (opts->short_name)
- pos += fprintf(stderr, "-%c", opts->short_name);
+ pos += fprintf(stdout, "-%c", opts->short_name);
else
- pos += fprintf(stderr, " ");
+ pos += fprintf(stdout, " ");
if (opts->long_name && opts->short_name)
- pos += fprintf(stderr, ", ");
+ pos += fprintf(stdout, ", ");
if (opts->long_name)
- pos += fprintf(stderr, "--%s", opts->long_name);
+ pos += fprintf(stdout, "--%s", opts->long_name);
switch (opts->type) {
case OPTION_ARGUMENT:
@@ -593,11 +593,11 @@ static void print_option_help(const struct option *opts, int full)
case OPTION_UINTEGER:
if (opts->flags & PARSE_OPT_OPTARG)
if (opts->long_name)
- pos += fprintf(stderr, "[=<n>]");
+ pos += fprintf(stdout, "[=<n>]");
else
- pos += fprintf(stderr, "[<n>]");
+ pos += fprintf(stdout, "[<n>]");
else
- pos += fprintf(stderr, " <n>");
+ pos += fprintf(stdout, " <n>");
break;
case OPTION_CALLBACK:
if (opts->flags & PARSE_OPT_NOARG)
@@ -607,19 +607,19 @@ static void print_option_help(const struct option *opts, int full)
if (opts->argh) {
if (opts->flags & PARSE_OPT_OPTARG)
if (opts->long_name)
- pos += fprintf(stderr, "[=<%s>]", opts->argh);
+ pos += fprintf(stdout, "[=<%s>]", opts->argh);
else
- pos += fprintf(stderr, "[<%s>]", opts->argh);
+ pos += fprintf(stdout, "[<%s>]", opts->argh);
else
- pos += fprintf(stderr, " <%s>", opts->argh);
+ pos += fprintf(stdout, " <%s>", opts->argh);
} else {
if (opts->flags & PARSE_OPT_OPTARG)
if (opts->long_name)
- pos += fprintf(stderr, "[=...]");
+ pos += fprintf(stdout, "[=...]");
else
- pos += fprintf(stderr, "[...]");
+ pos += fprintf(stdout, "[...]");
else
- pos += fprintf(stderr, " ...");
+ pos += fprintf(stdout, " ...");
}
break;
default: /* OPTION_{BIT,BOOLEAN,SET_UINT,SET_PTR} */
@@ -636,10 +636,10 @@ static void print_option_help(const struct option *opts, int full)
if (pos <= USAGE_OPTS_WIDTH)
pad = USAGE_OPTS_WIDTH - pos;
else {
- fputc('\n', stderr);
+ fputc('\n', stdout);
pad = USAGE_OPTS_WIDTH;
}
- fprintf(stderr, "%*s%s\n", pad + USAGE_GAP, "", opts->help);
+ fprintf(stdout, "%*s%s\n", pad + USAGE_GAP, "", opts->help);
}
int usage_with_options_internal(const char * const *usagestr,
@@ -648,23 +648,23 @@ int usage_with_options_internal(const char * const *usagestr,
if (!usagestr)
return PARSE_OPT_HELP;
- fprintf(stderr, "\n usage: %s\n", *usagestr++);
+ fprintf(stdout, "\n usage: %s\n", *usagestr++);
while (*usagestr && **usagestr)
- fprintf(stderr, " or: %s\n", *usagestr++);
+ fprintf(stdout, " or: %s\n", *usagestr++);
while (*usagestr) {
- fprintf(stderr, "%s%s\n",
+ fprintf(stdout, "%s%s\n",
**usagestr ? " " : "",
*usagestr);
usagestr++;
}
if (opts->type != OPTION_GROUP)
- fputc('\n', stderr);
+ fputc('\n', stdout);
for ( ; opts->type != OPTION_END; opts++)
print_option_help(opts, full);
- fputc('\n', stderr);
+ fputc('\n', stdout);
return PARSE_OPT_HELP;
}
@@ -684,16 +684,16 @@ int parse_options_usage(const char * const *usagestr,
if (!usagestr)
goto opt;
- fprintf(stderr, "\n usage: %s\n", *usagestr++);
+ fprintf(stdout, "\n usage: %s\n", *usagestr++);
while (*usagestr && **usagestr)
- fprintf(stderr, " or: %s\n", *usagestr++);
+ fprintf(stdout, " or: %s\n", *usagestr++);
while (*usagestr) {
- fprintf(stderr, "%s%s\n",
+ fprintf(stdout, "%s%s\n",
**usagestr ? " " : "",
*usagestr);
usagestr++;
}
- fputc('\n', stderr);
+ fputc('\n', stdout);
opt:
for ( ; opts->type != OPTION_END; opts++) {
--
2.6.1
--
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