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Commit c7ac2417 authored by Taeung Song's avatar Taeung Song Committed by Arnaldo Carvalho de Melo
Browse files

perf config: Add '--system' and '--user' options to select which config file is used 



The '--system' option means $(sysconfdir)/perfconfig and '--user' means
$HOME/.perfconfig. If none is used, both system and user config file are
read.  E.g.:

    # perf config [<file-option>] [options]

    With an specific config file:

    # perf config --user | --system

    or both user and system config file:

    # perf config

Signed-off-by: default avatarTaeung Song <treeze.taeung@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: http://lkml.kernel.org/r/1455126685-32367-2-git-send-email-treeze.taeung@gmail.com


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent a7636d9e

tools/perf/Documentation/perf-config.txt

+13 −1
Original line number Diff line number Diff line
@@ -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

------------------
@@ -30,6 +38,10 @@ The '$HOME/.perfconfig' file is used to store a per-user configuration. 
The file '$(sysconfdir)/perfconfig' can be used to

store a system-wide default configuration.



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

~~~~~~

tools/perf/builtin-config.c

+24 −3
Original line number Diff line number Diff line
@@ -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()

};
@@ -42,10 +46,23 @@ static int show_config(const char *key, const char *value, 
int cmd_config(int argc, const char **argv, const char *prefix __maybe_unused)

{

	int ret = 0;

	char *user_config = mkpath("%s/.perfconfig", getenv("HOME"));



	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 = user_config;



	switch (actions) {

	case ACTION_LIST:

		if (argc) {
@@ -53,9 +70,13 @@ int cmd_config(int argc, const char **argv, const char *prefix __maybe_unused) 
			parse_options_usage(config_usage, config_options, "l", 1);

		} else {

			ret = perf_config(show_config, NULL);

			if (ret < 0)

			if (ret < 0) {

				const char * config_filename = config_exclusive_filename;

				if (!config_exclusive_filename)

					config_filename = user_config;

				pr_err("Nothing configured, "

				       "please check your ~/.perfconfig file\n");

				       "please check your %s \n", config_filename);

			}

		}

		break;

	default:

tools/perf/util/cache.h

+3 −0
Original line number Diff line number Diff line
@@ -23,6 +23,8 @@ 
#define PERF_TRACEFS_ENVIRONMENT "PERF_TRACEFS_DIR"

#define PERF_PAGER_ENVIRONMENT "PERF_PAGER"



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 *);
@@ -31,6 +33,7 @@ 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);



char *alias_lookup(const char *alias);

int split_cmdline(char *cmdline, const char ***argv);

tools/perf/util/config.c

+2 −2
Original line number Diff line number Diff line
@@ -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)