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krb5_cc_lock - Lock a credential cache.
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.. c:function:: krb5_error_code krb5_cc_lock(krb5_context context, krb5_ccache ccache)
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**[in]** **context** - Library context
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**[in]** **ccache** - Credential cache handle
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- 0 Success; otherwise - Kerberos error codes
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Use :c:func:`krb5_cc_unlock()` to unlock the lock.