tools/testing/selftests/proc/self.c

File Facts

System

Linux kernel

Corpus path

tools/testing/selftests/proc/self.c

Extension

.c

Size

1204 bytes

Lines

40

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.

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

Dependency Surface

• assert.h
• stdio.h
• unistd.h
• proc.h

Detected Declarations

• function main

Annotated Snippet

// Test that /proc/self gives correct TGID.
#undef NDEBUG
#include <assert.h>
#include <stdio.h>
#include <unistd.h>

#include "proc.h"

int main(void)
{
	char buf1[64], buf2[64];
	pid_t pid;
	ssize_t rv;

	pid = sys_getpid();
	snprintf(buf1, sizeof(buf1), "%u", pid);

	rv = readlink("/proc/self", buf2, sizeof(buf2));
	assert(rv == strlen(buf1));
	buf2[rv] = '\0';
	assert(streq(buf1, buf2));

	return 0;
}

Annotation

• Immediate include surface: `assert.h`, `stdio.h`, `unistd.h`, `proc.h`.
• Detected declarations: `function main`.
• Atlas domain: Support Tooling And Documentation / tools.
• 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.