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backlight: Fix incr/decr with percent value of 0

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This now does nothing instead of incr/decr by 10%

MFC After:    3 days
PR: 	      253736
This commit is contained in:
David Schlachter 2021-03-03 08:57:35 +01:00 committed by Emmanuel Vadot
parent 5842073a9b
commit 3b005d51bd
1 changed files with 7 additions and 2 deletions
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9
usr.bin/backlight/backlight.c
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@ -98,7 +98,7 @@ main(int argc, char *argv[])
BACKLIGHTGETSTATUS,
BACKLIGHTUPDATESTATUS,
BACKLIGHTGETINFO};
long percent = 0;
long percent = -1;
const char *percent_error;
uint32_t i;
bool setname;
@ -188,15 +188,20 @@ main(int argc, char *argv[])
}
break;
case BACKLIGHT_SET_BRIGHTNESS:
if (percent == -1)
usage();
props.brightness = percent;
if (ioctl(fd, BACKLIGHTUPDATESTATUS, &props) == -1)
errx(1, "Cannot update the backlight device");
break;
case BACKLIGHT_INCR:
case BACKLIGHT_DECR:
if (percent == 0)
/* Avoid any ioctl if we don't have anything to do */
break;
if (ioctl(fd, BACKLIGHTGETSTATUS, &props) == -1)
errx(1, "Cannot query the backlight device");
percent = percent == 0 ? 10 : percent;
percent = percent == -1 ? 10 : percent;
percent = action == BACKLIGHT_INCR ? percent : -percent;
props.brightness += percent;
if ((int)props.brightness < 0)