tools/testing/selftests/exec/recursion-depth.c

Source file repositories/reference/linux-study-clean/tools/testing/selftests/exec/recursion-depth.c

File Facts

System
Linux kernel
Corpus path
tools/testing/selftests/exec/recursion-depth.c
Extension
.c
Size
2009 bytes
Lines
67
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 (errno == ENOSYS || errno == EPERM) {
			ksft_test_result_skip("error: unshare, errno %d\n", errno);
			ksft_finished();
		}
		ksft_exit_fail_perror("error: unshare");
	}

	if (mount(NULL, "/", NULL, MS_PRIVATE | MS_REC, NULL) == -1)
		ksft_exit_fail_perror("error: mount '/'");

	/* Require "exec" filesystem. */
	if (mount(NULL, "/tmp", "ramfs", 0, NULL) == -1)
		ksft_exit_fail_perror("error: mount ramfs");

#define FILENAME "/tmp/1"

	fd = creat(FILENAME, 0700);
	if (fd == -1)
		ksft_exit_fail_perror("error: creat");

#define S "#!" FILENAME "\n"
	if (write(fd, S, strlen(S)) != strlen(S))
		ksft_exit_fail_perror("error: write");

	close(fd);

	rv = execve(FILENAME, NULL, NULL);
	ksft_test_result(rv == -1 && errno == ELOOP,
			 "execve failed as expected (ret %d, errno %d)\n", rv, errno);
	ksft_finished();
}

Annotation

Implementation Notes