@node truncate, io
@subheading Syntax

@example
#include <unistd.h>

int truncate(const char *file, off_t size);
@end example

@subheading Description

This function truncates @var{file} to @var{size} bytes.

@subheading Return Value

Zero on success, nonzero on failure.

@subheading Portability

@portability !ansi, !posix

@subheading Example

@example
truncate("/tmp/data.txt", 400);
@end example