You want to set the target buffer to NULL on failure.

一旦字符串处理函数失败，就把目标缓冲区设成NULL。

youdao

Success is not built on success. It’s built on failure.

成功不是建立在成功之上。

youdao

It executes and returns true on success or false on failure.

它在查询成功时返回true，在失败时返回false。

youdao

It was scheduled to arrive in Tripoli at 6 o'clock " "We don't know where the communication failure happened, but what we can confirm is that were on board at the time."

VOA: standard.2010.05.12

This is where evaluation comes in. The success or failure of a poem depends on the realization of meaning.

这时就需要评估介入了，一首诗好与坏,取决于它含义表达是否清晰。

耶鲁公开课 - 文学理论导论课程节选

And today we'll finish that discussion, and, of course, point out actually the failure of classical mechanics to appropriately describe what's going on in an atom.

结束这部分的讨论，当然的，要指出经典力学,在描述原子内部,情况时是失败的。

麻省理工公开课 - 化学原理课程节选

Whatever its intentions, the National Challenge was now associated with a focus on failure and closure.

BBC: Primary schools face Sats threat

Rather than attempt to get it right, the establishment seems content to double-down on failure.

CENTERFORSECURITYPOLICY: 10failures

The US has been blamed on finance and on failure to cut its emissions more aggressively.

BBC: Science & Environment