{"record":{"id":"ce62edc46450ff8b","repo":"nikivdev/code","slug":"you-do-not-have-write-permission-to","errorCode":null,"errorMessage":"You do not have write permission to {}","messagePattern":"You do not have write permission to (.+?)","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"src/upgrade.rs","lineNumber":541,"sourceCode":"\n        let metadata = fs::metadata(path).or_else(|_| fs::metadata(parent))?;\n        let uid = unsafe { libc::getuid() };\n\n        if metadata.uid() == 0 && uid != 0 {\n            bail!(\n                \"You don't have write permission to {} because it's owned by root.\\n\\\n                 Consider updating flow through your package manager if installed from it.\\n\\\n                 Otherwise run `f upgrade` as root.\",\n                path.display()\n            );\n        }\n    }\n\n    // Try to check if we can write\n    if path.exists() {\n        let metadata = fs::metadata(path)?;\n        if metadata.permissions().readonly() {\n            bail!(\"You do not have write permission to {}\", path.display());\n        }\n    } else if !parent.exists() || fs::metadata(parent)?.permissions().readonly() {\n        bail!(\"You do not have write permission to {}\", parent.display());\n    }\n\n    Ok(())\n}\n\n/// Run the upgrade command.\npub fn run(opts: UpgradeOpts) -> Result<()> {\n    let current = current_version();\n    let current_exe = current_exe_path()?;\n\n    println!(\"Current version: {}\", current);\n\n    // Check write permissions early\n    let output_path = opts\n        .output","sourceCodeStart":523,"sourceCodeEnd":559,"githubUrl":"https://github.com/nikivdev/code/blob/a747e741ae92c09071d0ae946ab48488adcff1ce/src/upgrade.rs#L523-L559","documentation":"In `check_write_permission` (src/upgrade.rs:~535), when the target path exists but its metadata reports `readonly()`, the function bails: the user lacks write permission to the existing binary, so a self-upgrade would fail. This is the pre-check before replacing the executable.","triggerScenarios":"`path.exists()` is true and `fs::metadata(path)?.permissions().readonly()` is true — i.e. the binary file is read-only for the current user (mode without user-write, e.g. 0555/0444, or read-only mount).","commonSituations":"Binaries installed system-wide (0555) via package manager; read-only /usr mounted from a container image or NFS; file managed by nix/immutable store.","solutions":["Run the upgrade with elevated privileges (`sudo f upgrade`) if the location is system-owned.","Use the package manager that installed the binary to update it.","Check permissions with `ls -l $(which f)` and add write access: `chmod u+w <path>` (if appropriate).","Reinstall into a user-writable prefix such as ~/.local/bin."],"exampleFix":null,"handlingStrategy":"validation","validationCode":"BIN=\"$(command -v f)\"\n[ -w \"$BIN\" ] || { echo \"$BIN not writable; use sudo or package manager\"; exit 1; }","typeGuard":null,"tryCatchPattern":null,"preventionTips":["Test writability with `[ -w \"$BIN\" ]` before upgrading.","Prefer user-local install prefixes (~/.local/bin).","Watch for read-only mounts in containers/NFS before self-upgrading.","Update via the owning package manager when files are 0555."],"tags":["permissions","readonly","filesystem","upgrade"],"backgroundTag":"read-only-file-permission-denied","analyzedSha":"a747e741ae92c09071d0ae946ab48488adcff1ce","analyzedAt":"2026-09-01T22:43:55.719Z","contentChangedAt":null,"schemaVersion":2},"datasetVersion":"2026-09-08T10:18:20.063Z"}