forked from rosa/hakurei
Ophestra
c33a6a5b7e
This prevents inadvertent use of insecure compatibility features. Closes #30. Signed-off-by: Ophestra <cat@gensokyo.uk>
52 lines
1.2 KiB
Go
52 lines
1.2 KiB
Go
package outcome
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import (
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"context"
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"log"
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"time"
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_ "unsafe" // for go:linkname
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"hakurei.app/hst"
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"hakurei.app/message"
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)
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// IsPollDescriptor reports whether fd is the descriptor being used by the poller.
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//
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// Made available here to determine and reject impossible fd.
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//
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//go:linkname IsPollDescriptor internal/poll.IsPollDescriptor
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func IsPollDescriptor(fd uintptr) bool
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// Main runs an app according to [hst.Config] and terminates. Main does not return.
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func Main(
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ctx context.Context,
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msg message.Msg,
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config *hst.Config,
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flags int,
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fd int,
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) {
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// avoids runtime internals or standard streams
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if fd >= 0 {
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if IsPollDescriptor(uintptr(fd)) || fd < 3 {
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log.Fatalf("invalid identifier fd %d", fd)
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}
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}
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var id hst.ID
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if err := hst.NewInstanceID(&id); err != nil {
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log.Fatal(err.Error())
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}
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k := outcome{syscallDispatcher: direct{msg}}
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finaliseTime := time.Now()
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if err := k.finalise(ctx, msg, &id, config, flags); err != nil {
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printMessageError(msg.GetLogger().Fatalln, "cannot seal app:", err)
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panic("unreachable")
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}
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msg.Verbosef("finalise took %.2f ms", float64(time.Since(finaliseTime).Nanoseconds())/1e6)
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k.main(msg, fd)
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panic("unreachable")
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}
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