Messages in this thread Patch in this message | | | From | Jiri Olsa <> | Subject | [PATCH 07/20] perf data: Fail check_backup in case of error | Date | Sun, 24 Feb 2019 20:06:43 +0100 |
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And display the error message from removing the old data file:
$ perf record ls Can't remove old data: Permission denied (perf.data.old) Perf session creation failed.
$ perf record ls Can't remove old data: Unknown file found (perf.data.old) Perf session creation failed.
Not sure how to make fail the rename (after we successfully remove the destination file/dir) to show the message, anyway let's have it there.
Link: http://lkml.kernel.org/n/tip-6k0tikvlyugms7xxqs794jxz@git.kernel.org Signed-off-by: Jiri Olsa <jolsa@kernel.org> --- tools/perf/util/data.c | 21 ++++++++++++++++++--- 1 file changed, 18 insertions(+), 3 deletions(-)
diff --git a/tools/perf/util/data.c b/tools/perf/util/data.c index bbf9a299615e..d008c3973012 100644 --- a/tools/perf/util/data.c +++ b/tools/perf/util/data.c @@ -41,12 +41,27 @@ static int check_backup(struct perf_data *data) return 0; if (!stat(data->path, &st) && st.st_size) { - /* TODO check errors properly */ char oldname[PATH_MAX]; + int ret; + snprintf(oldname, sizeof(oldname), "%s.old", data->path); - rm_rf_perf_data(oldname); - rename(data->path, oldname); + + ret = rm_rf_perf_data(oldname); + if (ret) { + pr_err("Can't remove old data: %s (%s)\n", + ret == -2 ? + "Unknown file found" : strerror(errno), + oldname); + return -1; + } + + if (rename(data->path, oldname)) { + pr_err("Can't move data: %s (%s to %s)\n", + strerror(errno), + data->path, oldname); + return -1; + } } return 0; -- 2.17.2
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