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Which of the following system call is used for truncating a file?

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Which of the following system call is used for truncating a file?

(a) truncate

(b) ftruncate

(c) trunk

(d) truncate and ftruncate

I had been asked this question by my school principal while I was bunking the class.

My question is taken from System Calls Basics topic in portion System Programming I – Files of Unix

1 Answer

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Best answer
Right choice is (d) truncate and ftruncate

The best I can explain: The truncate and ftruncate calls can truncate a file to any length. These calls are often used in combination with lseek to overwrite a certain segment of a file.

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