tools/testing/selftests/powerpc/dscr/dscr_inherit_test.c

Source file repositories/reference/linux-study-clean/tools/testing/selftests/powerpc/dscr/dscr_inherit_test.c

File Facts

System
Linux kernel
Corpus path
tools/testing/selftests/powerpc/dscr/dscr_inherit_test.c
Extension
.c
Size
1894 bytes
Lines
87
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 (pid == -1) {
			perror("fork() failed");
			exit(1);
		} else if (pid) {
			int status;

			if (waitpid(pid, &status, 0) == -1) {
				perror("waitpid() failed");
				exit(1);
			}

			if (!WIFEXITED(status)) {
				fprintf(stderr, "Child didn't exit cleanly\n");
				exit(1);
			}

			if (WEXITSTATUS(status) != 0) {
				fprintf(stderr, "Child didn't exit cleanly\n");
				return 1;
			}
		} else {
			cur_dscr = get_dscr();
			if (cur_dscr != dscr) {
				fprintf(stderr, "Kernel DSCR should be %ld "
					"but is %ld\n", dscr, cur_dscr);
				exit(1);
			}

			cur_dscr_usr = get_dscr_usr();
			if (cur_dscr_usr != dscr) {
				fprintf(stderr, "User DSCR should be %ld "
					"but is %ld\n", dscr, cur_dscr_usr);
				exit(1);
			}
			exit(0);
		}
	}
	return 0;
}

int main(int argc, char *argv[])
{
	return test_harness(dscr_inherit, "dscr_inherit_test");
}

Annotation

Implementation Notes