Re: [PATCH 1/5] trace-cmd: Use TRACE_DIR envrionment variable if defined
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From: Steven Rostedt <rostedt@goodmis.org>
Date: 2012-08-22 13:37:47
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lkml, qemu-devel
On Wed, 2012-08-22 at 17:43 +0900, Yoshihiro YUNOMAE wrote:
From: Masami Hiramatsu <redacted> Use TRACE_DIR environment variable for setting
TRACING_DIR would be better, as we are searching for /debug/tracing and not /debug/trace. Perhaps DEBUG_TRACING_DIR would be even better as to be less of a generic term. -- Steve
quoted hunk ↗ jump to hunk
debugfs/tracing directory if defined. This is for controlling guest(or remote) ftrace. Signed-off-by: Masami Hiramatsu <redacted> Signed-off-by: Yoshihiro YUNOMAE <redacted> --- trace-util.c | 9 +++++++++ 1 files changed, 9 insertions(+), 0 deletions(-)diff --git a/trace-util.c b/trace-util.c index e128188..d5a3eb4 100644 --- a/trace-util.c +++ b/trace-util.c@@ -311,6 +311,15 @@ char *tracecmd_find_tracing_dir(void) char type[100]; FILE *fp; + tracing_dir = getenv("TRACE_DIR"); + if (tracing_dir) { + tracing_dir = strdup(tracing_dir); + if (!tracing_dir) + die("malloc"); + warning("Use environmental tracing directory: %s\n", tracing_dir); + return tracing_dir; + } + if ((fp = fopen("/proc/mounts","r")) == NULL) { warning("Can't open /proc/mounts for read"); return NULL;