Messages in this thread Patch in this message | | | From | Jiri Olsa <> | Subject | [PATCH 19/24] perf tools: Add is_perf_data function | Date | Tue, 17 Nov 2020 12:00:48 +0100 |
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Adding is_perf_data function that returns true if the given path is perf data file. It will be used in following patches.
Signed-off-by: Jiri Olsa <jolsa@kernel.org> --- tools/perf/util/data.c | 19 +++++++++++++++++++ tools/perf/util/data.h | 1 + 2 files changed, 20 insertions(+)
diff --git a/tools/perf/util/data.c b/tools/perf/util/data.c index c47aa34fdc0a..be049e812f5a 100644 --- a/tools/perf/util/data.c +++ b/tools/perf/util/data.c @@ -457,3 +457,22 @@ char *perf_data__kallsyms_name(struct perf_data *data) return kallsyms_name; } + +bool is_perf_data(const char *path) +{ + bool ret = false; + FILE *file; + u64 magic; + + file = fopen(path, "r"); + if (!file) + return false; + + if (fread(&magic, 1, 8, file) < 8) + goto out; + + ret = is_perf_magic(magic); +out: + fclose(file); + return ret; +} diff --git a/tools/perf/util/data.h b/tools/perf/util/data.h index 75947ef6bc17..0ebb1568ca86 100644 --- a/tools/perf/util/data.h +++ b/tools/perf/util/data.h @@ -89,4 +89,5 @@ int perf_data__update_dir(struct perf_data *data); unsigned long perf_data__size(struct perf_data *data); int perf_data__make_kcore_dir(struct perf_data *data, char *buf, size_t buf_sz); char *perf_data__kallsyms_name(struct perf_data *data); +bool is_perf_data(const char *path); #endif /* __PERF_DATA_H */ -- 2.26.2
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