DOKK / manpages / debian 11 / libexplain-dev / explain_fputc_or_die.3.en
explain_fputc_or_die(3) Library Functions Manual explain_fputc_or_die(3)

explain_fputc_or_die - output of characters and report errors

#include <libexplain/fputc.h>

void explain_fputc_or_die(int c, FILE *fp);

The explain_fputc_or_die function is used to call the fputc(3) system call. On failure an explanation will be printed to stderr, obtained from explain_fputc(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_fputc_or_die(c, fp);
The c, exactly as to be passed to the fputc(3) system call.
The fp, exactly as to be passed to the fputc(3) system call.
This function only returns on success. On failure, prints an explanation and exits.

fputc(3)
output of characters
explain_fputc(3)
explain fputc(3) errors
exit(2)
terminate the calling process

libexplain version 1.4
Copyright (C) 2008 Peter Miller