Another dlt-dameon recreate fifo file before exit error

[jack-liuhang]

dlt-daemon/src/daemon/dlt-daemon.c

Line 1580 in a4105dd

static int dlt_daemon_init_fifo(DltDaemonLocal *daemon_local)

static int dlt_daemon_init_fifo(DltDaemonLocal *daemon_local)
{
    int ret;
    int fd = -1;
    int fifo_size;

    /* open named pipe(FIFO) to receive DLT messages from users */
    umask(0);

    /* Try to delete existing pipe, ignore result of unlink */
    const char *tmpFifo = daemon_local->flags.daemonFifoName;
    unlink(tmpFifo);

    ret = mkfifo(tmpFifo, S_IRUSR | S_IWUSR | S_IWGRP);

if a dlt-daemon is running, and someone else startup another dlt-daemon again, and it will exit error because of binding ip/port confilct.
But this dlt-daemon will recreate FIFO file, and the first daemon cannot receive any message from FIFO because the old file is deleted