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26 lines
675 B
Go
26 lines
675 B
Go
package usershell
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import (
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"os"
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"os/exec"
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"path/filepath"
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"strings"
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"golang.org/x/xerrors"
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)
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// Get returns the $SHELL environment variable.
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func Get(username string) (string, error) {
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// This command will output "UserShell: /bin/zsh" if successful, we
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// can ignore the error since we have fallback behavior.
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out, _ := exec.Command("dscl", ".", "-read", filepath.Join("/Users", username), "UserShell").Output()
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s, ok := strings.CutPrefix(string(out), "UserShell: ")
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if ok {
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return strings.TrimSpace(s), nil
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}
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if s = os.Getenv("SHELL"); s != "" {
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return s, nil
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}
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return "", xerrors.Errorf("shell for user %q not found via dscl or in $SHELL", username)
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}
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