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    Subject[PATCH 1/5] trace-cmd: Use TRACE_DIR envrionment variable if defined
    Date
    From: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>

    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 <masami.hiramatsu.pt@hitachi.com>
    Signed-off-by: Yoshihiro YUNOMAE <yoshihiro.yunomae.ez@hitachi.com>
    ---

    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;



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