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libct: wrap unix.Mount/Unmount errors

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Errors returned by unix are bare. In some cases it's impossible to find
out what went wrong because there's is not enough context.

Add a mountError type (mostly copy-pasted from github.com/moby/sys/mount),
and mount/unmount helpers. Use these where appropriate, and convert error
checks to use errors.Is.

Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
This commit is contained in:
Kir Kolyshkin
2021-06-22 15:33:09 -07:00
parent 825335b2b7
commit 36aefad45d
5 changed files with 135 additions and 47 deletions
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libcontainer/console_linux.go
+1 -1
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@@ -18,7 +18,7 @@ func mountConsole(slavePath string) error {
if f != nil {
f.Close()
}
return unix.Mount(slavePath, "/dev/console", "bind", unix.MS_BIND, "")
return mount(slavePath, "/dev/console", "", "bind", unix.MS_BIND, "")
}
// dupStdio opens the slavePath for the console and dups the fds to the current