diff options
| -rw-r--r-- | parse.go | 40 |
1 files changed, 35 insertions, 5 deletions
@@ -2,9 +2,12 @@ package main import ( "encoding/json" + "errors" "io" direct "os" + "strconv" "strings" + "syscall" "git.gensokyo.uk/security/fortify/fst" "git.gensokyo.uk/security/fortify/internal/fmsg" @@ -16,12 +19,23 @@ func tryPath(name string) (config *fst.Config) { config = new(fst.Config) if name != "-" { - if f, err := os.Open(name); err != nil { - fmsg.Fatalf("cannot access configuration file %q: %s", name, err) - panic("unreachable") + r = tryFd(name) + if r == nil { + fmsg.VPrintln("load configuration from file") + + if f, err := os.Open(name); err != nil { + fmsg.Fatalf("cannot access configuration file %q: %s", name, err) + panic("unreachable") + } else { + // finalizer closes f + r = f + } } else { - // finalizer closes f - r = f + defer func() { + if err := r.(io.ReadCloser).Close(); err != nil { + fmsg.Printf("cannot close config fd: %v", err) + } + }() } } else { r = direct.Stdin @@ -35,6 +49,22 @@ func tryPath(name string) (config *fst.Config) { return } +func tryFd(name string) io.ReadCloser { + if v, err := strconv.Atoi(name); err != nil { + fmsg.VPrintf("name cannot be interpreted as int64: %v", err) + return nil + } else { + fd := uintptr(v) + if _, _, errno := syscall.Syscall(syscall.SYS_FCNTL, fd, syscall.F_GETFD, 0); errno != 0 { + if errors.Is(errno, syscall.EBADF) { + return nil + } + fmsg.Fatalf("cannot get fd %d: %v", fd, errno) + } + return direct.NewFile(fd, strconv.Itoa(v)) + } +} + func tryShort(name string) (config *fst.Config, instance *state.State) { likePrefix := false if len(name) <= 32 { |