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restic/internal/backend/foreground.go

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package backend
import (
"os"
"os/exec"
"strings"
)
// StartForeground runs cmd in the foreground, by temporarily switching to the
// new process group created for cmd. The returned function `bg` switches back
// to the previous process group.
//
// The command's environment has all RESTIC_* variables removed.
func StartForeground(cmd *exec.Cmd) (bg func() error, err error) {
env := os.Environ() // Returns a copy that we can modify.
cmd.Env = env[:0]
for _, kv := range env {
if strings.HasPrefix(kv, "RESTIC_") {
continue
}
cmd.Env = append(cmd.Env, kv)
}
return startForeground(cmd)
}