1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause
66 	fprintf(stderr, "\tbacklight [-q] [-f device]\n");  in usage()
67 	fprintf(stderr, "\tbacklight [-q] [-f device] -i\n");  in usage()
68 	fprintf(stderr, "\tbacklight [-f device] value\n");  in usage()
69 	fprintf(stderr, "\tbacklight [-f device] incr|+ value\n");  in usage()
70 	fprintf(stderr, "\tbacklight [-f device] decr|- value\n");  in usage()
99 	long percent = -1;  in main()
105 	fd = -1;  in main()
107 	while ((ch = getopt(argc, argv, "f:qhi")) != -1) {  in main()
124 	argc -= optind;  in main()
130 			argc -= 1;  in main()
134 		    strcmp("-", argv[0]) == 0) {  in main()
136 			argc -= 1;  in main()
144 			    argv[0][strlen(argv[0]) - 1] == '%')  in main()
145 				argv[0][strlen(argv[0]) - 1] = '\0';  in main()
148 				errx(1, "Cannot parse brightness level %s: %s",  in main()
154 	if ((fd = open(device_name, O_RDWR)) == -1)  in main()
171 		if (ioctl(fd, BACKLIGHTGETSTATUS, &props) == -1)  in main()
174 			printf("%u\n", props.brightness);  in main()
176 			printf("brightness: %d\n", props.brightness);  in main()
178 				printf("levels:");  in main()
180 					printf(" %d", props.levels[i]);  in main()
186 		if (percent == -1)  in main()
188 		props.brightness = percent;  in main()
189 		if (ioctl(fd, BACKLIGHTUPDATESTATUS, &props) == -1)  in main()
197 		if (ioctl(fd, BACKLIGHTGETSTATUS, &props) == -1)  in main()
199 		percent = percent == -1 ? 10 : percent;  in main()
200 		percent = action == BACKLIGHT_INCR ? percent : -percent;  in main()
201 		props.brightness += percent;  in main()
202 		if ((int)props.brightness < 0)  in main()
203 			props.brightness = 0;  in main()
204 		if (props.brightness > 100)  in main()
205 			props.brightness = 100;  in main()
206 		if (ioctl(fd, BACKLIGHTUPDATESTATUS, &props) == -1)  in main()
210 		if (ioctl(fd, BACKLIGHTGETINFO, &info) == -1)  in main()