-----Original Message----- From: PowerTop [mailto:powertop-bounces@lists.01.org] On Behalf Of xiechj(a)mail2.sysu.edu.cn Sent: Friday, April 29, 2016 7:05 AM To: powertop(a)lists.01.org Subject: [Powertop] [PATCH] Throw error message when system cmd returns Non-zero value. From: Madper Xie <madper.xie(a)canonical.com&gt; hciconfig returns 0 when succeed. Signed-off-by: Madper Xie <madper.xie(a)canonical.com&gt; --- src/tuning/bluetooth.cpp | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/src/tuning/bluetooth.cpp b/src/tuning/bluetooth.cpp index dab46d7..2958849 100644 --- a/src/tuning/bluetooth.cpp +++ b/src/tuning/bluetooth.cpp @@ -176,11 +176,11 @@ void bt_tunable::toggle(void) good = good_bad(); if (good == TUNE_GOOD) { - if(!system("/usr/sbin/hciconfig hci0 up &> /dev/null &")) + if(system("/usr/sbin/hciconfig hci0 up &> /dev/null &")) printf("System is not available\n"); return; } - if(!system("/usr/sbin/hciconfig hci0 down &> /dev/null")) + if(system("/usr/sbin/hciconfig hci0 down &> /dev/null")) printf("System is not available\n"); } -- 2.7.4 _______________________________________________ PowerTop mailing list PowerTop(a)lists.01.org https://lists.01.org/mailman/listinfo/powertop