* setconsole.c - redirect system console output
*
* Copyright (C) 2004,2005 Enrik Berkhan <Enrik.Berkhan@inka.de>
+ * Copyright (C) 2008 Bernhard Reutner-Fischer
*
- * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
-#include <getopt.h>
-#include "busybox.h"
+//usage:#define setconsole_trivial_usage
+//usage: "[-r" IF_FEATURE_SETCONSOLE_LONG_OPTIONS("|--reset") "] [DEVICE]"
+//usage:#define setconsole_full_usage "\n\n"
+//usage: "Redirect system console output to DEVICE (default: /dev/tty)\n"
+//usage: "\n -r Reset output to /dev/console"
-#if ENABLE_FEATURE_SETCONSOLE_LONG_OPTIONS
-static const struct option setconsole_long_options[] = {
- { "reset", 0, NULL, 'r' },
- { 0, 0, 0, 0 }
-};
-#endif
-
-#define OPT_SETCONS_RESET 1
+#include "libbb.h"
-int setconsole_main(int argc, char **argv);
-int setconsole_main(int argc, char **argv)
+int setconsole_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int setconsole_main(int argc UNUSED_PARAM, char **argv)
{
- unsigned long flags;
const char *device = CURRENT_TTY;
+ bool reset;
#if ENABLE_FEATURE_SETCONSOLE_LONG_OPTIONS
- applet_long_options = setconsole_long_options;
+ static const char setconsole_longopts[] ALIGN1 =
+ "reset\0" No_argument "r"
+ ;
+ applet_long_options = setconsole_longopts;
#endif
- flags = getopt32(argc, argv, "r");
+ /* at most one non-option argument */
+ opt_complementary = "?1";
+ reset = getopt32(argv, "r");
- if (argc - optind > 1)
- bb_show_usage();
-
- if (argc - optind == 1) {
- if (flags & OPT_SETCONS_RESET)
- bb_show_usage();
- device = argv[optind];
+ argv += 1 + reset;
+ if (*argv) {
+ device = *argv;
} else {
- if (flags & OPT_SETCONS_RESET)
+ if (reset)
device = DEV_CONSOLE;
}
- if (-1 == ioctl(xopen(device, O_RDONLY), TIOCCONS)) {
- bb_perror_msg_and_die("TIOCCONS");
- }
+ xioctl(xopen(device, O_WRONLY), TIOCCONS, NULL);
return EXIT_SUCCESS;
}