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40 lines
1009 B
40 lines
1009 B
package system
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import (
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"fmt"
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"runtime"
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"syscall"
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)
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// Via http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=7b21fddd087678a70ad64afc0f632e0f1071b092
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//
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// We need different setns values for the different platforms and arch
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// We are declaring the macro here because the SETNS syscall does not exist in th stdlib
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var setNsMap = map[string]uintptr{
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"linux/386": 346,
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"linux/arm64": 268,
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"linux/amd64": 308,
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"linux/arm": 375,
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"linux/ppc": 350,
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"linux/ppc64": 350,
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"linux/ppc64le": 350,
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"linux/s390x": 339,
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}
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var sysSetns = setNsMap[fmt.Sprintf("%s/%s", runtime.GOOS, runtime.GOARCH)]
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func SysSetns() uint32 {
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return uint32(sysSetns)
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}
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func Setns(fd uintptr, flags uintptr) error {
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ns, exists := setNsMap[fmt.Sprintf("%s/%s", runtime.GOOS, runtime.GOARCH)]
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if !exists {
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return fmt.Errorf("unsupported platform %s/%s", runtime.GOOS, runtime.GOARCH)
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}
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_, _, err := syscall.RawSyscall(ns, fd, flags, 0)
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if err != 0 {
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return err
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}
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return nil
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}
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