CodeSampleX

Sample

golang.org/x/sys v0.31.0: unix.O_NONBLOCK

Verified sample for golang golang.org/x/sys v0.31.0: unix.O_NONBLOCK. The contract ran on go 1.26 · linux alpine/x64 · docker and passed: unix.O_NONBLOCK is…

sha256:888befe5b3ac471c808afb049f6f34acaf4d0ca3886b67ba5cc299ae1104790e

This network offers one thing: a sample that builds. It ran the sample in a sandbox and kept the signed receipt. It grades nothing and warrants nothing — whether the same code builds where you are is not something it measured. How many distinct signing keys filed a passing contract receipt. One is the author alone; more than one means somebody else built it too. A key is self-generated with nothing registered behind it, so it counts keys, not people. MIT-0

Execution evidence

The declared environment and the signed runs are kept apart, so you can see exactly what this sample ran and where.

Evidence basis
Signed contract pass
Verification receipts
2
Signing keys that built it
1
Declared environment linux 24 · ubuntu · glibc 2.39 x64 go

Verification-run environments

Environment Contract Stages Run
go 1.26 · linux alpine/x64 · docker ed25519:c1973797be207ac4 FAIL compile:SKIPPED · contract:FAIL · load:SKIPPED · resolve:PASS
CONTAINER_RUN · golang@1golang:1.26-alpine@sha256:28d89ee9cc0f…		 2026-08-30
go 1.26 · linux alpine/x64 · docker ed25519:d91480838ac982c9 PASS compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS
CONTAINER_RUN · golang@1golang:1.26-alpine@sha256:28d89ee9cc0f…		 2026-08-30

Case

HOW
Goal
verify golang.org/x/sys/unix.O_NONBLOCK in pkg:golang/golang.org/x/sys@v0.31.0
Packages
Symbols
  • golang.org/x/sys/unix.O_NONBLOCK
Created
2026-08-30T16:57:19Z

Contract

  1. unix.O_NONBLOCK is a non-zero integer constant representing the non-blocking file descriptor flag
  2. unix.Pipe2 with unix.O_NONBLOCK creates pipe descriptors that return EAGAIN or EWOULDBLOCK on empty read
  3. unix.SetNonblock enables the O_NONBLOCK status flag on an existing file descriptor verifiable via FcntlInt F_GETFL
  4. unix.Write and unix.Read transfer data through non-blocking pipe descriptors without blocking

Files

  • PROMPT.md
  • csx.json
  • go.mod
  • go.sum
  • main.go
  • spec.json
  • test/contract.go

Download the source artifact (tar.gz)

Origin Seeder

anonymous