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explain_ungetc_or_die(3)   Library Functions Manual   explain_ungetc_or_die(3)

NAME
       explain_ungetc_or_die  -	 push  a character back	to a stream and	report
       errors

SYNOPSIS
       #include	<libexplain/ungetc.h>
       void explain_ungetc_or_die(int c, FILE *fp);
       int explain_ungetc_on_error(int c, FILE *fp);

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

       The explain_ungetc_on_error function is used to call the	ungetc(3) sys-
       tem call. On failure an explanation will	be printed to stderr, obtained
       from the	explain_ungetc(3) function, but	still returns to the caller.

       c       The c, exactly as to be passed to the ungetc(3) system call.

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

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

       The explain_ungetc_on_error function always returns the value return by
       the wrapped ungetc(3) system call.

EXAMPLE
       The explain_ungetc_or_die function is intended to be used in a  fashion
       similar to the following	example:
	      explain_ungetc_or_die(c, fp);

SEE ALSO
       ungetc(3)
	       push a character	back to	a stream

       explain_ungetc(3)
	       explain ungetc(3) errors

       exit(2) terminate the calling process

COPYRIGHT
       libexplain version 1.3
       Copyright (C) 2010 Peter	Miller

						      explain_ungetc_or_die(3)

NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | EXAMPLE | SEE ALSO | COPYRIGHT

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