From: Kan Liang <[email protected]> And an interface for perf_data_file to open tmp file. Automatically generate the tmp file name if it's not assigned. The name cannot be const char. Introduce char *tmp_path for it. The tmp file will be deleted after close.
It will be used as per-thread file to temporarily store event synthesizd result in the following patch. Signed-off-by: Kan Liang <[email protected]> --- tools/perf/util/data.c | 26 ++++++++++++++++++++++++++ tools/perf/util/data.h | 2 ++ 2 files changed, 28 insertions(+) diff --git a/tools/perf/util/data.c b/tools/perf/util/data.c index 1123b30..cd6fdf9 100644 --- a/tools/perf/util/data.c +++ b/tools/perf/util/data.c @@ -139,9 +139,35 @@ int perf_data_file__open(struct perf_data_file *file) return open_file(file); } +int perf_data_file__open_tmp(struct perf_data_file *file) +{ + int fd; + + if (!file->tmp_path && + (asprintf(&file->tmp_path, "perf.tmp.XXXXXX") < 0)) + goto err; + + fd = mkstemp(file->tmp_path); + if (fd < 0) { + free(file->tmp_path); + goto err; + } + + file->fd = fd; + return 0; +err: + file->tmp_path = NULL; + return -1; +} + void perf_data_file__close(struct perf_data_file *file) { close(file->fd); + if (file->tmp_path) { + unlink(file->tmp_path); + free(file->tmp_path); + file->tmp_path = NULL; + } } ssize_t perf_data_file__write(struct perf_data_file *file, diff --git a/tools/perf/util/data.h b/tools/perf/util/data.h index ae510ce..892b3d5 100644 --- a/tools/perf/util/data.h +++ b/tools/perf/util/data.h @@ -10,6 +10,7 @@ enum perf_data_mode { struct perf_data_file { const char *path; + char *tmp_path; int fd; bool is_pipe; bool force; @@ -43,6 +44,7 @@ static inline unsigned long perf_data_file__size(struct perf_data_file *file) } int perf_data_file__open(struct perf_data_file *file); +int perf_data_file__open_tmp(struct perf_data_file *file); void perf_data_file__close(struct perf_data_file *file); ssize_t perf_data_file__write(struct perf_data_file *file, void *buf, size_t size); -- 2.7.4
