samples/cgroup/cgroup_event_listener.c

File Facts

System

Linux kernel

Corpus path

samples/cgroup/cgroup_event_listener.c

Extension

.c

Size

1858 bytes

Lines

84

Domain

Support Tooling And Documentation

Bucket

samples

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.

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

Dependency Surface

• assert.h
• err.h
• errno.h
• fcntl.h
• libgen.h
• limits.h
• stdio.h
• string.h
• unistd.h
• sys/eventfd.h

Detected Declarations

• function Copyright

Annotated Snippet

if (ret == -1) {
			if (errno == EINTR)
				continue;
			err(1, "Cannot read from eventfd");
		}
		assert(ret == sizeof(result));

		ret = access(event_control_path, W_OK);
		if ((ret == -1) && (errno == ENOENT)) {
			puts("The cgroup seems to have removed.");
			break;
		}

		if (ret == -1)
			err(1, "cgroup.event_control is not accessible any more");

		printf("%s %s: crossed\n", argv[1], argv[2]);
	}

	return 0;
}

Annotation

• Immediate include surface: `assert.h`, `err.h`, `errno.h`, `fcntl.h`, `libgen.h`, `limits.h`, `stdio.h`, `string.h`.
• Detected declarations: `function Copyright`.
• Atlas domain: Support Tooling And Documentation / samples.
• Implementation status: source implementation candidate.

Implementation Notes

• This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
• Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
• Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.