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

explain_lseek_or_die - reposition file offset and report errors

#include <libexplain/lseek.h>

long long explain_lseek_or_die(int fildes, long long offset, int whence);

The explain_lseek_or_die function is used to call the lseek(2) system call. On failure an explanation will be printed to stderr, obtained from explain_lseek(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:

long long result = explain_lseek_or_die(fildes, offset, whence);
The fildes, exactly as to be passed to the lseek(2) system call.
The offset, exactly as to be passed to the lseek(2) system call.
The whence, exactly as to be passed to the lseek(2) system call.
On successful, returns the resulting offset location as measured in bytes from the beginning of the file. On failure, prints an explanation and exits.

lseek(2)
reposition file offset
explain_lseek(3)
explain lseek(2) errors
exit(2)
terminate the calling process

libexplain version 1.4
Copyright (C) 2008 Peter Miller