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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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