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Man Pages
explain_fputc_or_die(3) FreeBSD 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);
c
The c, exactly as to be passed to the fputc(3) system call.
fp
The fp, exactly as to be passed to the fputc(3) system call.
Returns:
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 1.3
 
Copyright (C) 2008 Peter Miller

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