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Message-ID: <20151103114941.GE5733@danjae.kornet>
Date: Tue, 3 Nov 2015 20:49:41 +0900
From: Namhyung Kim <namhyung@...nel.org>
To: Taeung Song <treeze.taeung@...il.com>
Cc: Arnaldo Carvalho de Melo <acme@...nel.org>,
linux-kernel@...r.kernel.org, jolsa@...hat.com,
Ingo Molnar <mingo@...hat.com>
Subject: Re: [PATCH v9 2/9] perf config: Add '--system' and '--user' options
to select which config file is used
On Tue, Nov 03, 2015 at 10:50:13AM +0900, Taeung Song wrote:
> The file-options '--system' means $(sysconfdir)/perfconfig and
> '--user' means $HOME/.perfconfig. If file-option isn't used,
> both system and user config file is read.
> The syntax examples are like below.
>
> perf config [<file-option>] [options]
>
> a specific config file.
> # perf config --user | --system
> or
> both user and system config file.
> # perf config
>
> Signed-off-by: Taeung Song <treeze.taeung@...il.com>
Acked-by: Namhyung Kim <namhyung@...nel.org>
Thanks,
Namhyung
> ---
> tools/perf/Documentation/perf-config.txt | 14 +++++++++++++-
> tools/perf/builtin-config.c | 18 +++++++++++++++++-
> tools/perf/util/cache.h | 3 +++
> tools/perf/util/config.c | 4 ++--
> 4 files changed, 35 insertions(+), 4 deletions(-)
>
> diff --git a/tools/perf/Documentation/perf-config.txt b/tools/perf/Documentation/perf-config.txt
> index a590319..2188722 100644
> --- a/tools/perf/Documentation/perf-config.txt
> +++ b/tools/perf/Documentation/perf-config.txt
> @@ -8,7 +8,7 @@ perf-config - Get and set variables in a configuration file.
> SYNOPSIS
> --------
> [verse]
> -'perf config' -l | --list
> +'perf config' [<file-option>] -l | --list
>
> DESCRIPTION
> -----------
> @@ -21,6 +21,14 @@ OPTIONS
> --list::
> Show current config variables, name and value, for all sections.
>
> +--user::
> + For writing and reading options: write to user
> + '$HOME/.perfconfig' file or read it.
> +
> +--system::
> + For writing and reading options: write to system-wide
> + '$(sysconfdir)/perfconfig' or read it.
> +
> CONFIGURATION FILE
> ------------------
>
> @@ -33,6 +41,10 @@ store a system-wide default configuration.
> The variables are divided into sections. In each section, the variables
> that are composed of a name and value.
>
> +When reading or writing, the values are read from the system and user
> +configuration files by default, and options '--system' and '--user'
> +can be used to tell the command to read from or write to only that location.
> +
> Syntax
> ~~~~~~
>
> diff --git a/tools/perf/builtin-config.c b/tools/perf/builtin-config.c
> index 2d16150..68e105a 100644
> --- a/tools/perf/builtin-config.c
> +++ b/tools/perf/builtin-config.c
> @@ -13,8 +13,10 @@
> #include "util/util.h"
> #include "util/debug.h"
>
> +static bool use_system_config, use_user_config;
> +
> static const char * const config_usage[] = {
> - "perf config [options]",
> + "perf config [<file-option>] [options]",
> NULL
> };
>
> @@ -25,6 +27,8 @@ enum actions {
> static struct option config_options[] = {
> OPT_SET_UINT('l', "list", &actions,
> "show current config variables", ACTION_LIST),
> + OPT_BOOLEAN(0, "system", &use_system_config, "use system config file"),
> + OPT_BOOLEAN(0, "user", &use_user_config, "use user config file"),
> OPT_END()
> };
>
> @@ -46,6 +50,18 @@ int cmd_config(int argc, const char **argv, const char *prefix __maybe_unused)
> argc = parse_options(argc, argv, config_options, config_usage,
> PARSE_OPT_STOP_AT_NON_OPTION);
>
> + if (use_system_config && use_user_config) {
> + pr_err("Error: only one config file at a time\n");
> + parse_options_usage(config_usage, config_options, "user", 0);
> + parse_options_usage(NULL, config_options, "system", 0);
> + return -1;
> + }
> +
> + if (use_system_config)
> + config_exclusive_filename = perf_etc_perfconfig();
> + else if (use_user_config)
> + config_exclusive_filename = mkpath("%s/.perfconfig", getenv("HOME"));
> +
> switch (actions) {
> case ACTION_LIST:
> default:
> diff --git a/tools/perf/util/cache.h b/tools/perf/util/cache.h
> index c861373..d1eb75f 100644
> --- a/tools/perf/util/cache.h
> +++ b/tools/perf/util/cache.h
> @@ -19,6 +19,8 @@
> #define PERF_DEBUGFS_ENVIRONMENT "PERF_DEBUGFS_DIR"
> #define PERF_TRACEFS_ENVIRONMENT "PERF_TRACEFS_DIR"
>
> +extern const char *config_exclusive_filename;
> +
> typedef int (*config_fn_t)(const char *, const char *, void *);
> extern int perf_default_config(const char *, const char *, void *);
> extern int perf_config(config_fn_t fn, void *);
> @@ -27,6 +29,7 @@ extern u64 perf_config_u64(const char *, const char *);
> extern int perf_config_bool(const char *, const char *);
> extern int config_error_nonbool(const char *);
> extern const char *perf_config_dirname(const char *, const char *);
> +extern const char *perf_etc_perfconfig(void);
>
> /* pager.c */
> extern void setup_pager(void);
> diff --git a/tools/perf/util/config.c b/tools/perf/util/config.c
> index 2e452ac..55ef373 100644
> --- a/tools/perf/util/config.c
> +++ b/tools/perf/util/config.c
> @@ -26,7 +26,7 @@ static const char *config_file_name;
> static int config_linenr;
> static int config_file_eof;
>
> -static const char *config_exclusive_filename;
> +const char *config_exclusive_filename;
>
> static int get_next_char(void)
> {
> @@ -434,7 +434,7 @@ static int perf_config_from_file(config_fn_t fn, const char *filename, void *dat
> return ret;
> }
>
> -static const char *perf_etc_perfconfig(void)
> +const char *perf_etc_perfconfig(void)
> {
> static const char *system_wide;
> if (!system_wide)
> --
> 1.9.1
>
--
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