ipc: Improve error diagnostics for kill.

If dss is not running, the kill command prints "No such file or
directory" because the call to semget(2) fails with ENOENT. This
message is a bit misleading, so let's return -E_NOT_RUNNING in this
case instead.

diff --git a/ipc.c b/ipc.c
index 880ce1734522c3f2e6f2c9988e69976a5398f967..0f295a9d2e6fc34b600d38594d5bd219afd08ccf 100644 (file)
--- a/ipc.c
+++ b/ipc.c
@@ -120,7 +120,7 @@ int get_dss_pid(char *config_file, pid_t *pid)
                *pid = 0;
        ret = mutex_get(key, 0);
        if (ret < 0)
                *pid = 0;
        ret = mutex_get(key, 0);
        if (ret < 0)

-               return ret;
+               return ret == -ERRNO_TO_DSS_ERROR(ENOENT)? -E_NOT_RUNNING : ret;

        semid = ret;
        ret = semctl(semid, 1, GETPID);
        if (ret < 0)
        semid = ret;
        ret = semctl(semid, 1, GETPID);
        if (ret < 0)