{"record":{"id":"14b05aa24ef02b2f","repo":"flipped-aurora/gin-vue-admin","slug":"w-14b05a","errorCode":null,"errorMessage":"设置临时文件权限失败: %w","messagePattern":"设置临时文件权限失败: %w","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"warning","filePath":"server/service/system/auto_code_task.go","lineNumber":283,"sourceCode":"\t\treturn fmt.Errorf(\"创建目标目录 %s 失败: %w\", dir, err)\n\t}\n\ttmp, err := os.CreateTemp(dir, \".autocode-*\")\n\tif err != nil {\n\t\treturn fmt.Errorf(\"创建临时文件失败: %w\", err)\n\t}\n\ttmpName := tmp.Name()\n\tdefer os.Remove(tmpName)\n\tif _, err = tmp.Write(content); err == nil {\n\t\terr = tmp.Sync()\n\t}\n\tif closeErr := tmp.Close(); err == nil {\n\t\terr = closeErr\n\t}\n\tif err != nil {\n\t\treturn fmt.Errorf(\"写入临时文件失败: %w\", err)\n\t}\n\tif err = os.Chmod(tmpName, mode.Perm()); err != nil {\n\t\treturn fmt.Errorf(\"设置临时文件权限失败: %w\", err)\n\t}\n\tif err = os.Rename(tmpName, target); err != nil {\n\t\treturn fmt.Errorf(\"原子替换 %s 失败: %w\", target, err)\n\t}\n\treturn nil\n}\n\nfunc (l autoCodeTaskLayout) classify(target string) (string, error) {\n\tif isPathWithin(l.serverRoot, target) {\n\t\treturn autoCodeTaskBackend, nil\n\t}\n\tif isPathWithin(l.webRoot, target) {\n\t\treturn autoCodeTaskFrontend, nil\n\t}\n\treturn \"\", fmt.Errorf(\"自动代码目标不在服务端或前端目录内: %s\", target)\n}\n\nfunc pathWithin(root string, elems ...string) (string, error) {","sourceCodeStart":265,"sourceCodeEnd":301,"githubUrl":"https://github.com/flipped-aurora/gin-vue-admin/blob/3136500ef380842b0eb6c4daa87c3f8a47fcf9e0/server/service/system/auto_code_task.go#L265-L301","documentation":"Before renaming the temp file onto the target, its permission bits are set with os.Chmod to the recorded mode (or 0666 default). If chmod fails the atomic replace aborts with this error, since publishing with wrong permissions could break subsequent builds or runtime reads.","triggerScenarios":"os.Chmod(tmpName, mode.Perm()) returns an error — typically EPERM/EACCES when the temp file owner differs from the process (unusual) or the filesystem doesn't support chmod (some network/Windows-mounted filesystems, FAT, certain 9p/virtiofs mounts).","commonSituations":"Project checked out on a filesystem without POSIX permissions (Windows share, WSL cross-filesystem mount, exFAT/NTFS without metadata), or the temp file was tampered with concurrently.","solutions":["Move the project onto a POSIX-permission filesystem (ext4 inside WSL, native volume) or configure the mount to emulate UNIX permissions","Run the server as the owner of the project directory so chmod is permitted","If the wrapped cause is EPERM from security software, whitelist the project directory in the policy/AV"],"exampleFix":"// before (WSL: project on /mnt/c NTFS)\ncd /mnt/c/project && ./gva autocode\n// after: clone inside WSL fs\ncd ~/project && ./gva autocode","handlingStrategy":"fallback","validationCode":"// chmod support probe\ntest, err := os.CreateTemp(dir, \".perm-probe-*\")\nif err == nil {\n    if chErr := os.Chmod(test.Name(), 0o644); chErr != nil {\n        fmt.Println(\"filesystem does not support chmod:\", chErr)\n    }\n    os.Remove(test.Name())\n}","typeGuard":null,"tryCatchPattern":"err := commitAutoCodeFileTask(task, publish, persist)\nif err != nil && strings.Contains(err.Error(), \"设置临时文件权限失败\") {\n    log.Print(\"filesystem lacks chmod support; move workspace to a POSIX fs\")\n}","preventionTips":["Keep the project on a filesystem supporting POSIX permissions","In WSL, keep code in the Linux filesystem, not /mnt/c","Run generation as the file owner","Whitelist project dirs in security software enforcing mandatory policies"],"tags":["go","filesystem","chmod","permissions"],"backgroundTag":"chmod-failed","analyzedSha":"3136500ef380842b0eb6c4daa87c3f8a47fcf9e0","analyzedAt":"2026-08-31T13:50:02.721Z","schemaVersion":2},"datasetVersion":"2026-08-31T19:17:28.585Z"}