CodeSampleX

Sample

golang.org/x/sys v0.0.0-20220406155245-289d7a0edf71: unix.Open

Verified sample for golang golang.org/x/sys v0.0.0-20220406155245-289d7a0edf71: unix.Open. The contract ran on go 1.26 · linux alpine/x64 · docker and…

sha256:0d3c0e85723a01157731c14777a6eab54b0a0a51c37f9af42631f1be0ac22312

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
1
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 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.Open in pkg:golang/golang.org/x/sys@v0.0.0-20220406155245-289d7a0edf71
Packages
Symbols
  • golang.org/x/sys/unix.Open
Created
2026-08-30T16:37:31Z

Contract

  1. unix.Open opens an existing file with O_RDONLY and returns a non-negative file descriptor
  2. unix.Open with O_RDWR | O_CREAT creates a new file with specified permission bits and returns a valid file descriptor
  3. unix.Open with O_CREAT | O_EXCL on an existing file fails with unix.EEXIST error
  4. unix.Open on a non-existent path without O_CREAT fails with unix.ENOENT error
  5. unix.Open with O_WRONLY | O_APPEND writes data at the end of an existing file preserving prior contents
  6. unix.Open with O_WRONLY | O_TRUNC truncates an existing file to zero length on open
  7. unix.Open with O_CLOEXEC sets the close-on-exec flag on the opened file descriptor

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