tools/testing/selftests/thermal/intel/power_floor/power_floor_test.c

Source file repositories/reference/linux-study-clean/tools/testing/selftests/thermal/intel/power_floor/power_floor_test.c

File Facts

System
Linux kernel
Corpus path
tools/testing/selftests/thermal/intel/power_floor/power_floor_test.c
Extension
.c
Size
2314 bytes
Lines
109
Domain
Support Tooling And Documentation
Bucket
tools
Inferred role
Support Tooling And Documentation: implementation source
Status
source implementation candidate

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

if (fd < 0) {
			perror("Unable to power floor status file\n");
			exit(1);
		}

		if ((lseek(fd, 0L, SEEK_SET)) < 0) {
			fprintf(stderr, "Failed to set pointer to beginning\n");
			exit(1);
		}

		if (read(fd, status_str, sizeof(status_str)) < 0) {
			fprintf(stderr, "Failed to read from:%s\n",
			POWER_FLOOR_STATUS_ATTRIBUTE);
			exit(1);
		}

		ufd.fd = fd;
		ufd.events = POLLPRI;

		ret = poll(&ufd, 1, -1);
		if (ret < 0) {
			perror("poll error");
			exit(1);
		} else if (ret == 0) {
			printf("Poll Timeout\n");
		} else {
			if ((lseek(fd, 0L, SEEK_SET)) < 0) {
				fprintf(stderr, "Failed to set pointer to beginning\n");
				exit(1);
			}

			if (read(fd, status_str, sizeof(status_str)) < 0)
				exit(0);

			printf("power floor status: %s\n", status_str);
		}

		close(fd);
	}
}

Annotation

Implementation Notes