source: bootcd/isolinux/syslinux-6.03/com32/lib/fputc.c

/*
 * fputc.c
 *
 * gcc "printf decompilation" expects this to exist...
 */

#include <stdio.h>

int fputc(int c, FILE * f)
{
    unsigned char ch = c;

    return _fwrite(&ch, 1, f) == 1 ? ch : EOF;
}