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perf config: Add a function to set one variable in .perfconfig
To allow for setting a variable from some other tool, like with the "wallclock" patchset needs to allow the user to opt-in to having that key in the sort order for 'perf report'. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Dmitriy Vyukov <dvyukov@google.com> Cc: Ian Rogers <irogers@google.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: James Clark <james.clark@linaro.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: https://lore.kernel.org/lkml/Z4akewi7UPXpagce@x1 Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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@ -154,6 +154,44 @@ static int parse_config_arg(char *arg, char **var, char **value)
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return 0;
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return 0;
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}
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}
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int perf_config__set_variable(const char *var, const char *value)
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{
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char path[PATH_MAX];
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char *user_config = mkpath(path, sizeof(path), "%s/.perfconfig", getenv("HOME"));
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const char *config_filename;
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struct perf_config_set *set;
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int ret = -1;
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if (use_system_config)
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config_exclusive_filename = perf_etc_perfconfig();
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else if (use_user_config)
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config_exclusive_filename = user_config;
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if (!config_exclusive_filename)
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config_filename = user_config;
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else
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config_filename = config_exclusive_filename;
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set = perf_config_set__new();
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if (!set)
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goto out_err;
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if (perf_config_set__collect(set, config_filename, var, value) < 0) {
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pr_err("Failed to add '%s=%s'\n", var, value);
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goto out_err;
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}
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if (set_config(set, config_filename) < 0) {
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pr_err("Failed to set the configs on %s\n", config_filename);
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goto out_err;
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}
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ret = 0;
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out_err:
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perf_config_set__delete(set);
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return ret;
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}
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int cmd_config(int argc, const char **argv)
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int cmd_config(int argc, const char **argv)
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{
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{
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int i, ret = -1;
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int i, ret = -1;
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@ -50,6 +50,7 @@ int perf_config_set__collect(struct perf_config_set *set, const char *file_name,
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const char *var, const char *value);
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const char *var, const char *value);
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void perf_config__exit(void);
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void perf_config__exit(void);
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void perf_config__refresh(void);
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void perf_config__refresh(void);
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int perf_config__set_variable(const char *var, const char *value);
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/**
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/**
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* perf_config_sections__for_each - iterate thru all the sections
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* perf_config_sections__for_each - iterate thru all the sections
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