{"record":{"id":"f8494da02c1829fc","repo":"slimtoolkit/slim","slug":"error-parsing-gid-field-s-v","errorCode":null,"errorMessage":"error parsing GID field - %s (%v)","messagePattern":"error parsing GID field - (.+?) \\((.+?)\\)","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"pkg/sysidentity/sysidentity.go","lineNumber":335,"sourceCode":"\trecord.Username = parts[0]\n\trecord.Password = parts[1]\n\trecord.Info = parts[4]\n\trecord.Home = parts[5]\n\trecord.Shell = strings.TrimSpace(parts[6])\n\n\tif _, found := NoLoginShells[record.Shell]; found {\n\t\trecord.NoLoginShell = true\n\t}\n\n\tvar err error\n\trecord.UID, err = strconv.Atoi(parts[2])\n\tif err != nil {\n\t\treturn record, fmt.Errorf(\"error parsing UID field - %s (%v)\", parts[2], err)\n\t}\n\n\trecord.GID, err = strconv.Atoi(parts[3])\n\tif err != nil {\n\t\treturn record, fmt.Errorf(\"error parsing GID field - %s (%v)\", parts[3], err)\n\t}\n\n\treturn record, nil\n}\n\nconst (\n\tHasShadowFileRecord = \"x\"\n)\n\nfunc (ref PasswdRecord) UsesShadow() bool {\n\tif ref.Password == HasShadowFileRecord {\n\t\treturn true\n\t}\n\n\treturn false\n}\n\nvar NoLoginShells = map[string]struct{}{","sourceCodeStart":317,"sourceCodeEnd":353,"githubUrl":"https://github.com/slimtoolkit/slim/blob/81940d17fa112cc678e32209214bcb2355cb3004/pkg/sysidentity/sysidentity.go#L317-L353","documentation":"Same parser as the UID case: ParsePasswdRecord converts passwd field 3 (GID) with strconv.Atoi and returns this error when it is not a valid integer. The record is returned partially populated so the caller can inspect which line failed.","triggerScenarios":"ReadPasswdData -> ParsePasswdRecord on a passwd line whose fourth (GID) field is empty, alphabetic, or otherwise non-numeric.","commonSituations":"Corrupted or hand-edited /etc/passwd; group name mistakenly placed in the GID column; truncated lines from a bad provisioning script.","solutions":["Fix the offending /etc/passwd line so the GID field is numeric","Find bad lines with: awk -F: '$4 !~ /^[0-9]+$/{print}' /etc/passwd","Ensure the GID references a real group in /etc/group or create it","Re-run the identity read; the error names the bad field value"],"exampleFix":"// before\nsvc:x:1500:users::/home/svc:/bin/sh\n// after\nsvc:x:1500:1500::/home/svc:/bin/sh","handlingStrategy":"validation","validationCode":"func validPasswdGID(line string) bool {\n    parts := strings.Split(line, \":\")\n    if len(parts) < 4 { return false }\n    _, err := strconv.Atoi(parts[3])\n    return err == nil\n}","typeGuard":null,"tryCatchPattern":"rec, err := sysidentity.ParsePasswdRecord(line)\nif err != nil && strings.Contains(err.Error(), \"GID field\") {\n    log.Warnf(\"bad GID in passwd entry: %v\", err)\n    continue\n}","preventionTips":["Always pair new users with numeric GIDs, not group names","Validate /etc/passwd after automation runs","Keep GID column strictly numeric","Check: awk -F: '$4 !~ /^[0-9]+$/{print}' /etc/passwd"],"tags":["parsing","passwd","identity"],"backgroundTag":"passwd-parse-error","analyzedSha":"81940d17fa112cc678e32209214bcb2355cb3004","analyzedAt":"2026-08-31T23:06:12.682Z","contentChangedAt":null,"schemaVersion":2},"datasetVersion":"2026-09-08T05:18:18.240Z"}