Introduce/use internal/linux pkg to handle EINTR and error wrapping #4697
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The alternative to this is to create something like
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@rata WDYT? The motivation here is,
PS In an ideal world, I wish for a package like this ("wrapped unix") to already exist. |
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@kolyshkin Makes sense to me! This is definitely some direction I thought to explore after merging the other PR. When playing with our openat2 yesterday (to address your comment), I was thinking of thin wrappers that just do this but I wasn't sure it would be liked because of the existing openat wrapper that was doing more stuff. But you went ahead and did both things at once. Perfect :) |
internal/linux/linux.go
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| return os.NewSyscallError("dup3", retryOnEINTR(func() error { | ||
| return unix.Dup3(oldfd, newfd, flags) |
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nit: I think splitting this in more lines can be clearer. The functio that takes several params, the third of which is another function that takes a function param that is defined inline is a little bit too much, IMHO.
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Fixed this and also Sendmsg in the same way.
This package is to provide unix.* wrappers to ensure that: - they retry on EINTR; - a "rich" error is returned on failure. A first such wrapper, Sendmsg, is introduced. Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
Drop the libcontainer/system/exec, and use the linux.Exec instead. Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
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Inspired by #4680. The idea here is hide the retry-on-EINTR functionality inside a package, as well as provide error wrappers.
A few more wrappers is to be added.
PS I'm not sure about the package name, perhaps
sysoruunixis a better name. I want something short and simple.