[Qemu-devel] [PATCH 1/5] trace-cmd: Use TRACE_DIR envrionment variable if defined

[Yoshihiro YUNOMAE]

From: Masami Hiramatsu <address@hidden>

Use TRACE_DIR environment variable for setting
debugfs/tracing directory if defined. This is
for controlling guest(or remote) ftrace.

Signed-off-by: Masami Hiramatsu <address@hidden>
Signed-off-by: Yoshihiro YUNOMAE <address@hidden>
---

 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;