diff options
| author | Adrian Hunter <adrian.hunter@intel.com> | 2022-09-05 10:34:19 +0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2022-10-04 08:55:21 -0300 |
| commit | c3ca8d44185cc2ac5ca75d2d38647979da5b0035 (patch) | |
| tree | 4e318e46268c6dbff55381cfc3ace3563929a239 | |
| parent | 016f2f9821bd5d056d454aefa603f8b4f7d0e0f0 (diff) | |
perf tools: Add perf_config_scan()
To simplify getting a single config value, add a function to scan a config
variable.
Reviewed-by: Andi Kleen <ak@linux.intel.com>
Reviewed-by: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Link: https://lore.kernel.org/r/20220905073424.3971-2-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| -rw-r--r-- | tools/perf/util/config.c | 31 | ||||
| -rw-r--r-- | tools/perf/util/config.h | 1 |
2 files changed, 32 insertions, 0 deletions
diff --git a/tools/perf/util/config.c b/tools/perf/util/config.c index 60ce5908c664..3f2ae19a1dd4 100644 --- a/tools/perf/util/config.c +++ b/tools/perf/util/config.c @@ -908,3 +908,34 @@ void set_buildid_dir(const char *dir) /* for communicating with external commands */ setenv("PERF_BUILDID_DIR", buildid_dir, 1); } + +struct perf_config_scan_data { + const char *name; + const char *fmt; + va_list args; + int ret; +}; + +static int perf_config_scan_cb(const char *var, const char *value, void *data) +{ + struct perf_config_scan_data *d = data; + + if (!strcmp(var, d->name)) + d->ret = vsscanf(value, d->fmt, d->args); + + return 0; +} + +int perf_config_scan(const char *name, const char *fmt, ...) +{ + struct perf_config_scan_data d = { + .name = name, + .fmt = fmt, + }; + + va_start(d.args, fmt); + perf_config(perf_config_scan_cb, &d); + va_end(d.args); + + return d.ret; +} diff --git a/tools/perf/util/config.h b/tools/perf/util/config.h index 2fd77aaff4d2..2e5e808928a5 100644 --- a/tools/perf/util/config.h +++ b/tools/perf/util/config.h @@ -29,6 +29,7 @@ typedef int (*config_fn_t)(const char *, const char *, void *); int perf_default_config(const char *, const char *, void *); int perf_config(config_fn_t fn, void *); +int perf_config_scan(const char *name, const char *fmt, ...) __scanf(2, 3); int perf_config_set(struct perf_config_set *set, config_fn_t fn, void *data); int perf_config_int(int *dest, const char *, const char *); |