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(parent: 4c739ff) | patch
tracing: only truncate ftrace files when O_TRUNC is set
authorSteven Rostedt <srostedt@redhat.com>
Thu, 23 Jul 2009 03:29:30 +0000 (23:29 -0400)
committerSteven Rostedt <rostedt@goodmis.org>
Thu, 23 Jul 2009 14:07:18 +0000 (10:07 -0400)
commit8650ae32ef7045e763825dee6256dde7f331bb85
tree546a07e4c5b6fc731b48604769392a671c1fb18etree | snapshot (tar.gz zip)
parent4c739ff043e5787d97c9691d62cabf7a29e75a9dcommit | diff
tracing: only truncate ftrace files when O_TRUNC is set

The current code will truncate the ftrace files contents if O_APPEND
is not set and the file is opened in write mode. This is incorrect.
It should only truncate the file if O_TRUNC is set. Otherwise
if one of these files is opened by a C program with fopen "r+",
it will incorrectly truncate the file.

Reported-by: Jiri Olsa <jolsa@redhat.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
kernel/trace/ftrace.c diff | blob | blame | history
kernel/trace/trace.c diff | blob | blame | history
kernel/trace/trace_events.c diff | blob | blame | history
kernel source for telekom puls (alcatel/mediatek)