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Subject[PATCH 2/3] tracing/filters: disallow newline as delimeter
I guess because user input is often ended with '\n' (like "echo xxx"),
thus '\n' is used as a delimeter besides ' ' ? But we can just strip
tailing spaces.

One of the effects of this patch, is fixing this inconsistency:

# echo -n 'parent_comm ==' > filter
bash: echo: write error: Invalid argument
# echo 'parent_comm ==' > filter
# cat filter
parent_comm ==
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
---
kernel/trace/trace_events_filter.c | 4 +++-
1 files changed, 3 insertions(+), 1 deletions(-)
diff --git a/kernel/trace/trace_events_filter.c b/kernel/trace/trace_events_filter.c
index a63f965..9ef35c1 100644
--- a/kernel/trace/trace_events_filter.c
+++ b/kernel/trace/trace_events_filter.c
@@ -362,7 +362,9 @@ int filter_parse(char **pbuf, struct filter_pred *pred)
char *tok, *val_str = NULL;
int tok_n = 0;

- while ((tok = strsep(pbuf, " \n"))) {
+ strstrip(*pbuf);
+
+ while ((tok = strsep(pbuf, " "))) {
if (tok_n == 0) {
if (!strcmp(tok, "0")) {
pred->clear = 1;
--
1.5.4.rc3


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