DOKK / manpages / debian 12 / libexplain-dev / explain_ftruncate_or_die.3.en
explain_ftruncate_or_die(3) Library Functions Manual explain_ftruncate_or_die(3)

explain_ftruncate_or_die - truncate a file and report errors

#include <libexplain/ftruncate.h>

void explain_ftruncate_or_die(int fildes, long long length);

The explain_ftruncate_or_die function is used to call the ftruncate(2) system call. On failure an explanation will be printed to stderr, obtained from explain_ftruncate(3), and then the process terminates by calling exit(EXIT_FAILURE).

This function is intended to be used in a fashion similar to the following example:

explain_ftruncate_or_die(fildes, length);
The fildes, exactly as to be passed to the ftruncate(2) system call.
The length, exactly as to be passed to the ftruncate(2) system call.
This function only returns on success. On failure, prints an explanation and exits.

ftruncate(2)
truncate a file to a specified length
explain_ftruncate(3)
explain ftruncate(2) errors
exit(2)
terminate the calling process

libexplain version 1.4
Copyright (C) 2008 Peter Miller