NAME

       explain_vfprintf_or_die - formatted output conversion and report errors

SYNOPSIS

       #include <libexplain/vfprintf.h>
       void explain_vfprintf_or_die(FILE *fp, const char *format, va_list ap);
       int explain_vfprintf_on_error(FILE *fp, const char *format, va_list ap);

DESCRIPTION

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

       The  explain_vfprintf_on_error  function  is  used to call the vfprintf(3) system call. On
       failure an explanation will be printed to stderr, obtained  from  the  explain_vfprintf(3)
       function, but still returns to the caller.

       fp      The fp, exactly as to be passed to the vfprintf(3) system call.

       format  The format, exactly as to be passed to the vfprintf(3) system call.

       ap      The ap, exactly as to be passed to the vfprintf(3) system call.

RETURN VALUE

       The  explain_vfprintf_or_die  function  only  returns on success, see vfprintf(3) for more
       information. On failure, prints an explanation and exits, it does not return.

       The explain_vfprintf_on_error function always returns the  value  return  by  the  wrapped
       vfprintf(3) system call.

EXAMPLE

       The  explain_vfprintf_or_die  function  is intended to be used in a fashion similar to the
       following example:
              explain_vfprintf_or_die(fp, format, ap);

SEE ALSO

       vfprintf(3)
               formatted output conversion

       explain_vfprintf(3)
               explain vfprintf(3) errors

       exit(2) terminate the calling process

COPYRIGHT

       libexplain version 1.4
       Copyright (C) 2010 Peter Miller

                                                                       explain_vfprintf_or_die(3)