57 lines
1.4 KiB
Go
57 lines
1.4 KiB
Go
// +build linux
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package child
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import (
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"fmt"
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"github.com/hpcng/warewulf/internal/pkg/container"
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"github.com/hpcng/warewulf/internal/pkg/util"
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"github.com/hpcng/warewulf/internal/pkg/wwlog"
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"github.com/spf13/cobra"
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"os"
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"path"
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"syscall"
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)
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func CobraRunE(cmd *cobra.Command, args []string) error {
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if os.Getpid() != 1 {
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wwlog.Printf(wwlog.ERROR, "PID is not 1: %d\n", os.Getpid())
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os.Exit(1)
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}
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containerName := args[0]
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if container.ValidSource(containerName) == false {
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wwlog.Printf(wwlog.ERROR, "Unknown Warewulf container: %s\n", containerName)
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os.Exit(1)
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}
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containerPath := container.RootFsDir(containerName)
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syscall.Mount("", "/", "", syscall.MS_PRIVATE, "")
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syscall.Mount("/dev", path.Join(containerPath, "/dev"), "", syscall.MS_BIND, "")
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if util.IsFile(path.Join(containerPath, "/etc/resolv.conf")) == true {
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syscall.Mount("/etc/resolv.conf", path.Join(containerPath, "/etc/resolv.conf"), "", syscall.MS_BIND, "")
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}
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syscall.Chroot(containerPath)
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os.Chdir("/")
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syscall.Mount("rootfs", "rootfs", "", syscall.MS_BIND, "")
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syscall.Mount("/proc", "/proc", "proc", 0, "")
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ps1string := fmt.Sprintf("[%s] Warewulf> ", containerName)
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os.Setenv("PS1", ps1string)
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os.Setenv("HISTFILE", "/dev/null")
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err := syscall.Exec(args[1], args[1:], os.Environ())
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if err != nil {
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wwlog.Printf(wwlog.ERROR, "%s\n", err)
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os.Exit(1)
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}
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return nil
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}
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