61 	int bits = 256, fd;  in seed_rng()  local
66 	fd = open("/dev/random", O_WRONLY);  in seed_rng()
67 	if (fd < 0)  in seed_rng()
69 	if (ioctl(fd, RNDADDTOENTCNT, &bits) < 0)  in seed_rng()
71 	close(fd);  in seed_rng()
112 	int fd;  in enable_logging()  local
114 	fd = open("/proc/sys/kernel/printk", O_WRONLY);  in enable_logging()
115 	if (fd >= 0) {  in enable_logging()
116 		if (write(fd, "9\n", 2) != 2)  in enable_logging()
118 		close(fd);  in enable_logging()
120 	fd = open("/proc/sys/debug/exception-trace", O_WRONLY);  in enable_logging()
121 	if (fd >= 0) {  in enable_logging()
122 		if (write(fd, "1\n", 2) != 2)  in enable_logging()
124 		close(fd);  in enable_logging()
164 	int status, fd;  in launch_tests()  local
179 		fd = open("/proc/cmdline", O_RDONLY);  in launch_tests()
180 		if (fd < 0)  in launch_tests()
182 		if (read(fd, cmdline, sizeof(cmdline) - 1) <= 0)  in launch_tests()
195 		fd = open(success_dev, O_WRONLY);  in launch_tests()
196 		if (fd < 0)  in launch_tests()
198 		if (write(fd, "success\n", 8) != 8)  in launch_tests()
200 		close(fd);  in launch_tests()
219 		int fd = open("/dev/console", O_RDWR);  in ensure_console()  local
220 		if (fd < 0) {  in ensure_console()
224 		dup2(fd, 0);  in ensure_console()
225 		dup2(fd, 1);  in ensure_console()
226 		dup2(fd, 2);  in ensure_console()
227 		close(fd);  in ensure_console()
236 	int fd;  in clear_leaks()  local
238 	fd = open("/sys/kernel/debug/kmemleak", O_WRONLY);  in clear_leaks()
239 	if (fd < 0)  in clear_leaks()
242 	write(fd, "clear\n", 5);  in clear_leaks()
243 	close(fd);  in clear_leaks()
248 	int fd;  in check_leaks()  local
250 	fd = open("/sys/kernel/debug/kmemleak", O_WRONLY);  in check_leaks()
251 	if (fd < 0)  in check_leaks()
255 	write(fd, "scan\n", 5);  in check_leaks()
256 	close(fd);  in check_leaks()
258 	fd = open("/sys/kernel/debug/kmemleak", O_RDONLY);  in check_leaks()
259 	if (fd < 0)  in check_leaks()
261 	if (sendfile(1, fd, NULL, 0x7ffff000) > 0)  in check_leaks()
263 	close(fd);  in check_leaks()