/* hello.c -- print a greeting message and exit.
Copyright 1992, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2005,
2006, 2007, 2008, 2010, 2011 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <
http://www.gnu.org/licenses/>;. */
#include <config.h>
#include "system.h"
#include "progname.h"
#include "xalloc.h"
static const struct option longopts[] = {
{"greeting", required_argument, NULL, 'g'},
{"help", no_argument, NULL, 'h'},
{"next-generation", no_argument, NULL, 'n'},
{"traditional", no_argument, NULL, 't'},
{"version", no_argument, NULL, 'v'},
{NULL, 0, NULL, 0}
};
/* Different types of greetings; only one per invocation. */
typedef enum
{
greet_traditional,
greet_new
} greeting_type;
/* Forward declarations. */
static void print_help (void);
static void print_version (void);
static void print_frame (const size_t len);
int
main (int argc, char *argv[])
{
int optc;
int lose = 0;
const char *greeting_msg = _("Hello, world!");
wchar_t *mb_greeting;
size_t len;
greeting_type g = greet_traditional;
set_program_name (argv[0]);
/* Set locale via LC_ALL. */
setlocale (LC_ALL, "");
#if ENABLE_NLS
/* Set the text message domain. */
bindtextdomain (PACKAGE, LOCALEDIR);
textdomain (PACKAGE);
#endif
/* Even exiting has subtleties. On exit, if any writes failed, change
the exit status. The /dev/full device on GNU/Linux can be used for
testing; for instance, hello >/dev/full should exit unsuccessfully.
This is implemented in the Gnulib module "closeout". */
atexit (close_stdout);
while ((optc = getopt_long (argc, argv, "g:hntv", longopts, NULL)) != -1)
switch (optc)
{
/* --help and --version exit immediately, per GNU coding standards. */
case 'v':
print_version ();
exit (EXIT_SUCCESS);
break;
case 'g':
greeting_msg = optarg;
break;
case 'h':
print_help ();
exit (EXIT_SUCCESS);
break;
case 'n':
g = greet_new;
break;
case 't':
g = greet_traditional;
greeting_msg = _("hello, world");
break;
default:
lose = 1;
break;
}
if (lose || optind < argc)
{
/* Print error message and exit. */
if (optind < argc)
fprintf (stderr, _("%s: extra operand: %s\n"), program_name,
argv[optind]);
fprintf (stderr, _("Try `%s --help' for more information.\n"),
program_name);
exit (EXIT_FAILURE);
}
len = mbsrtowcs(NULL, &greeting_msg, 0, NULL);
if (len == (size_t)-1)
{
fprintf (stderr, _("%s: conversion to a multibyte string failed\n"), program_name);
exit (EXIT_FAILURE);
}
mb_greeting = xmalloc((len + 1) * sizeof(wchar_t));
mbsrtowcs(mb_greeting, &greeting_msg, len + 1, NULL);
/* Print greeting message and exit. */
if (g != greet_new)
wprintf (L"%ls\n", mb_greeting);
else
{
print_frame (len);
wprintf (L"| %ls |\n", mb_greeting);
print_frame (len);
}
free(mb_greeting);
exit (EXIT_SUCCESS);
}
/* Print new format upper and lower frame. */
void
print_frame (const size_t len)
{
size_t i;
fputws (L"+-", stdout);
for (i = 0; i < len; i++)
putwchar (L'-');
fputws (L"-+\n", stdout);
}
/* Print help info. This long message is split into
several pieces to help translators be able to align different
blocks and identify the various pieces. */
static void
print_help (void)
{
/* TRANSLATORS: --help output 1 (synopsis)
no-wrap */
printf (_("\
Usage: %s [OPTION]...\n"), program_name);
/* TRANSLATORS: --help output 2 (brief description)
no-wrap */
fputs (_("\
Print a friendly, customizable greeting.\n"), stdout);
puts ("");
/* TRANSLATORS: --help output 3: options 1/2
no-wrap */
fputs (_("\
-h, --help display this help and exit\n\
-v, --version display version information and exit\n"), stdout);
puts ("");
/* TRANSLATORS: --help output 4: options 2/2
no-wrap */
fputs (_("\
-t, --traditional use traditional greeting\n\
-n, --next-generation use next-generation greeting\n\
-g, --greeting=TEXT use TEXT as the greeting message\n"), stdout);
printf ("\n");
/* TRANSLATORS: --help output 5+ (reports)
TRANSLATORS: the placeholder indicates the bug-reporting address
for this application. Please add _another line_ with the
address for translation bugs.
no-wrap */
printf (_("\
Report bugs to: %s\n"), PACKAGE_BUGREPORT);
#ifdef PACKAGE_PACKAGER_BUG_REPORTS
printf (_("Report %s bugs to: %s\n"), PACKAGE_PACKAGER,
PACKAGE_PACKAGER_BUG_REPORTS);
#endif
#ifdef PACKAGE_URL
printf (_("%s home page: <%s>\n"), PACKAGE_NAME, PACKAGE_URL);
#else
printf (_("%s home page: <
http://www.gnu.org/software/%s/>;\n"),
PACKAGE_NAME, PACKAGE);
#endif
fputs (_("General help using GNU software: <
http://www.gnu.org/gethelp/>;\n"),
stdout);
}
/* Print version and copyright information. */
static void
print_version (void)
{
printf ("%s (%s) %s\n", PACKAGE, PACKAGE_NAME, VERSION);
/* xgettext: no-wrap */
puts ("");
/* It is important to separate the year from the rest of the message,
as done here, to avoid having to retranslate the message when a new
year comes around. */
printf (_("\
Copyright (C) %d Free Software Foundation, Inc.\n\
License GPLv3+: GNU GPL version 3 or later <
http://gnu.org/licenses/gpl.html>;\n\
This is free software: you are free to change and redistribute it.\n\
There is NO WARRANTY, to the extent permitted by law.\n"), COPYRIGHT_YEAR);
}