Fail if no sensors found. - energy - measure system energy usage
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       ---
 (DIR) commit 33cf70dcdbb4ed08ba53d121d06a3c6904db9af7
 (DIR) parent b7668ab38ae59f6202ea72674b738ec0b676e227
 (HTM) Author: Troels Henriksen <athas@sigkill.dk>
       Date:   Wed, 23 Aug 2023 12:25:44 +0200
       
       Fail if no sensors found.
       
       Diffstat:
         M energy.c                            |       5 +++++
       
       1 file changed, 5 insertions(+), 0 deletions(-)
       ---
 (DIR) diff --git a/energy.c b/energy.c
       @@ -143,6 +143,11 @@ int main(int argc, char** argv) {
          sensor_rapl();
          sensor_battery();
        
       +  if (num_sensors == 0) {
       +    fprintf(stderr, "%s: no sensors found; not running command.\n", argv[0]);
       +    exit(1);
       +  }
       +
          for (int i = 0; i < num_sensors; i++) {
            sensors[i].start(sensors[i].data);
          }