| 1 | package main |
| 2 | |
| 3 | import ( |
| 4 | "encoding/json" |
| 5 | "fmt" |
| 6 | "io" |
| 7 | "os" |
| 8 | "path/filepath" |
| 9 | "strings" |
| 10 | |
| 11 | "reasonix/internal/packagegrant" |
| 12 | ) |
| 13 | |
| 14 | const ( |
| 15 | stripPackageGrantsFlag = "-strip-package-grants" |
| 16 | stripPackageGrantsApp = "-app" |
| 17 | ) |
| 18 | |
| 19 | // stripPackageGrantsRequest reports whether args ask for the grant pass, and the |
| 20 | // application executable it names. |
| 21 | func stripPackageGrantsRequest(args []string) (string, bool) { |
| 22 | requested, app := false, "" |
| 23 | for i := 0; i < len(args); i++ { |
| 24 | name := "-" + strings.TrimLeft(args[i], "-") |
| 25 | switch { |
| 26 | case name == stripPackageGrantsFlag: |
| 27 | requested = true |
| 28 | case name == stripPackageGrantsApp && i+1 < len(args): |
| 29 | app = args[i+1] |
| 30 | i++ |
| 31 | default: |
| 32 | if value, ok := strings.CutPrefix(name, stripPackageGrantsApp+"="); ok { |
| 33 | app = value |
| 34 | } |
| 35 | } |
| 36 | } |
| 37 | return app, requested |
| 38 | } |
| 39 | |
| 40 | // stripPackageGrants works on the directory the application runs from and is |
| 41 | // never handed a directory directly: the grants it removes are the ones that |
| 42 | // stop that application's own sandboxed children from loading, and no other |
| 43 | // tree is this mode's to change. The report goes to out as one JSON line. |
| 44 | func stripPackageGrants(out, logs io.Writer, app string) int { |
| 45 | if strings.TrimSpace(app) == "" { |
| 46 | fmt.Fprintln(logs, "strip-package-grants: -app names no application") |
| 47 | return 2 |
| 48 | } |
| 49 | exe, err := filepath.EvalSymlinks(app) |
| 50 | if err != nil { |
| 51 | fmt.Fprintf(logs, "strip-package-grants: %v\n", err) |
| 52 | return 2 |
| 53 | } |
| 54 | if info, err := os.Stat(exe); err != nil || !info.Mode().IsRegular() { |
| 55 | fmt.Fprintf(logs, "strip-package-grants: %s is not an application executable\n", exe) |
| 56 | return 2 |
| 57 | } |
| 58 | report, err := packagegrant.Strip(filepath.Dir(exe)) |
| 59 | if err != nil { |
| 60 | fmt.Fprintf(logs, "strip-package-grants: %v\n", err) |
| 61 | return 1 |
| 62 | } |
| 63 | for _, refused := range report.Refused { |
| 64 | fmt.Fprintf(logs, "strip-package-grants: kept a grant at %s: %v\n", refused.Path, refused.Err) |
| 65 | } |
| 66 | for _, unread := range report.Unread { |
| 67 | fmt.Fprintf(logs, "strip-package-grants: could not read %s: %v\n", unread.Path, unread.Err) |
| 68 | } |
| 69 | if err := json.NewEncoder(out).Encode(report); err != nil { |
| 70 | return 1 |
| 71 | } |
| 72 | return 0 |
| 73 | } |
| 74 |