From 863981e96738983919de841ec669e157e6bdaeb0 Mon Sep 17 00:00:00 2001 From: André Fabian Silva Delgado Date: Sun, 11 Sep 2016 04:34:46 -0300 Subject: Linux-libre 4.7.1-gnu --- tools/perf/util/data.c | 41 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 41 insertions(+) (limited to 'tools/perf/util/data.c') diff --git a/tools/perf/util/data.c b/tools/perf/util/data.c index 1921942fc..be8351615 100644 --- a/tools/perf/util/data.c +++ b/tools/perf/util/data.c @@ -136,3 +136,44 @@ ssize_t perf_data_file__write(struct perf_data_file *file, { return writen(file->fd, buf, size); } + +int perf_data_file__switch(struct perf_data_file *file, + const char *postfix, + size_t pos, bool at_exit) +{ + char *new_filepath; + int ret; + + if (check_pipe(file)) + return -EINVAL; + if (perf_data_file__is_read(file)) + return -EINVAL; + + if (asprintf(&new_filepath, "%s.%s", file->path, postfix) < 0) + return -ENOMEM; + + /* + * Only fire a warning, don't return error, continue fill + * original file. + */ + if (rename(file->path, new_filepath)) + pr_warning("Failed to rename %s to %s\n", file->path, new_filepath); + + if (!at_exit) { + close(file->fd); + ret = perf_data_file__open(file); + if (ret < 0) + goto out; + + if (lseek(file->fd, pos, SEEK_SET) == (off_t)-1) { + ret = -errno; + pr_debug("Failed to lseek to %zu: %s", + pos, strerror(errno)); + goto out; + } + } + ret = file->fd; +out: + free(new_filepath); + return ret; +} -- cgit v1.2.3-54-g00ecf