2 * Copyright (C) 2008 Andre Noll <maan@tuebingen.mpg.de>
4 * Licensed under the GPL v2. For licencing details see COPYING.
7 /** \file ggo.c Function for printing help. */
15 * Wrapper for printf() that exits on errors.
17 * \param fmt Usual format string.
19 * \return The return value of the underlying (successful) call to vprintf(3),
20 * i.e. the number of characters printed, excluding the terminating null byte.
22 __printf_1_2 int printf_or_die(const char *fmt, ...)
28 ret = vprintf(fmt, argp);
36 * Print one of the two given help texts.
38 * \param help contains the help texts.
39 * \param flags What to print, see \ref ggo_print_help_flags.
41 void ggo_print_help(struct ggo_help *help, unsigned flags)
45 if (help->purpose && (flags & GPH_PRINT_NAME_PURPOSE))
46 printf_or_die("para_%s - %s\n", help->prefix, help->purpose);
47 if (help->usage && (flags & GPH_PRINT_USAGE))
48 printf_or_die("\n%s\n", help->usage);
49 if (help->description && (flags & GPH_PRINT_DESCRIPTION))
50 printf_or_die("\n%s\n", help->description);
52 if (flags & GPH_DETAILED)
53 p = help->detailed_help;
59 printf_or_die("%s\n", *p);