tools/testing/selftests/mm/write_to_hugetlbfs.c

Source file repositories/reference/linux-study-clean/tools/testing/selftests/mm/write_to_hugetlbfs.c

File Facts

System
Linux kernel
Corpus path
tools/testing/selftests/mm/write_to_hugetlbfs.c
Extension
.c
Size
4836 bytes
Lines
247
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 (shmaddr) {
			printf("Deleting the memory\n");
			if (shmdt((const void *)shmaddr) != 0) {
				perror("Detach failure");
				shmctl(shmid, IPC_RMID, NULL);
				exit(4);
			}

			shmctl(shmid, IPC_RMID, NULL);
			printf("Done deleting the memory\n");
		}
	}
	exit(2);
}

int main(int argc, char **argv)
{
	int fd = 0;
	int key = 0;
	int *ptr = NULL;
	int c = 0;
	size_t size = 0;
	char path[256] = "";
	enum method method = MAX_METHOD;
	int want_sleep = 0, private = 0;
	int populate = 0;
	int write = 0;
	int reserve = 1;

	if (signal(SIGINT, sig_handler) == SIG_ERR)
		err(1, "\ncan't catch SIGINT\n");

	/* Parse command-line arguments. */
	setvbuf(stdout, NULL, _IONBF, 0);
	self = argv[0];

	while ((c = getopt(argc, argv, "s:p:m:owlrn")) != -1) {
		switch (c) {
		case 's':
			if (sscanf(optarg, "%zu", &size) != 1) {
				perror("Invalid -s.");
				exit_usage();
			}
			break;
		case 'p':
			strncpy(path, optarg, sizeof(path) - 1);
			break;
		case 'm':
			if (atoi(optarg) >= MAX_METHOD) {
				errno = EINVAL;
				perror("Invalid -m.");
				exit_usage();
			}
			method = atoi(optarg);
			break;
		case 'o':
			populate = 1;
			break;
		case 'w':
			write = 1;
			break;
		case 'l':
			want_sleep = 1;
			break;
		case 'r':
		    private
			= 1;
			break;
		case 'n':
			reserve = 0;
			break;
		default:
			errno = EINVAL;
			perror("Invalid arg");
			exit_usage();
		}
	}

	if (strncmp(path, "", sizeof(path)) != 0) {
		printf("Writing to this path: %s\n", path);
	} else {
		errno = EINVAL;
		perror("path not found");
		exit_usage();
	}

	if (size != 0) {
		printf("Writing this size: %zu\n", size);
	} else {
		errno = EINVAL;

Annotation

Implementation Notes