elinks/src/config/cmdline.c

/* Command line processing */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h> /* OS/2 needs this after sys/types.h */
#endif
#include <sys/stat.h> /* OS/2 needs this after sys/types.h */
#ifdef HAVE_NETDB_H
#include <netdb.h>
#endif

/* We need to have it here. Stupid BSD. */
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#ifdef HAVE_ARPA_INET_H
#include <arpa/inet.h>
#endif

#include "elinks.h"

#include "config/cmdline.h"
#include "config/conf.h"
#include "config/options.h"
#include "config/opttypes.h"
#include "intl/gettext/libintl.h"
#include "network/dns.h"
#include "protocol/uri.h"
#include "session/session.h"
#include "util/error.h"
#include "util/file.h"
#include "util/lists.h"
#include "util/memory.h"
#include "util/string.h"


/* Hack to handle URL extraction for -remote commands */
static unsigned char *remote_url;

static enum retval
parse_options_(int argc, unsigned char *argv[], struct option *opt,
               struct list_head *url_list)
{
	while (argc) {
		argv++, argc--;

		if (argv[-1][0] == '-' && argv[-1][1]) {
			struct option *option;
			unsigned char *argname = &argv[-1][1];
			unsigned char *oname = stracpy(argname);
			unsigned char *err;

			if (!oname) continue;

			/* Treat --foo same as -foo. */
			if (argname[0] == '-') argname++;

			option = get_opt_rec(opt, argname);
			if (!option) option = get_opt_rec(opt, oname);
			if (!option) {
				unsigned char *pos;

				oname++; /* the '-' */
				/* Substitute '-' by '_'. This helps
				 * compatibility with that very wicked browser
				 * called 'lynx'. */
				for (pos = strchr(oname, '_'); pos;
				     pos = strchr(pos, '_'))
					*pos = '-';
				option = get_opt_rec(opt, oname);
				oname--;
			}

			mem_free(oname);

			if (!option) goto unknown_option;

			if (!option_types[option->type].cmdline)
				goto unknown_option;

			err = option_types[option->type].cmdline(option, &argv, &argc);

			if (err) {
				if (err[0]) {
					usrerror(gettext("Cannot parse option %s: %s"), argv[-1], err);

					return RET_SYNTAX;
				}

				/* XXX: Empty strings means all is well and have
				 * a cup of shut the fsck up. */
				return RET_COMMAND;

			} else if (remote_url) {
				if (url_list) add_to_string_list(url_list, remote_url, -1);
				mem_free(remote_url);
				remote_url = NULL;
			}

		} else if (url_list) {
			add_to_string_list(url_list, argv[-1], -1);
		}
	}

	return RET_OK;

unknown_option:
	usrerror(gettext("Unknown option %s"), argv[-1]);
	return RET_SYNTAX;
}

enum retval
parse_options(int argc, unsigned char *argv[], struct list_head *url_list)
{
	return parse_options_(argc, argv, cmdline_options, url_list);
}


/**********************************************************************
 Options handlers
**********************************************************************/

static unsigned char *
eval_cmd(struct option *o, unsigned char ***argv, int *argc)
{
	if (*argc < 1) return gettext("Parameter expected");

	(*argv)++; (*argc)--;	/* Consume next argument */

	parse_config_file(config_options, "-eval", *(*argv - 1), NULL, 0);

	fflush(stdout);

	return NULL;
}

static unsigned char *
forcehtml_cmd(struct option *o, unsigned char ***argv, int *argc)
{
	safe_strncpy(get_opt_str("mime.default_type"), "text/html", MAX_STR_LEN);
	return NULL;
}

static unsigned char *
lookup_cmd(struct option *o, unsigned char ***argv, int *argc)
{
	struct sockaddr_storage *addrs = NULL;
	int addrno, i;

	if (!*argc) return gettext("Parameter expected");
	if (*argc > 1) return gettext("Too many parameters");

	(*argv)++; (*argc)--;
	if (do_real_lookup(*(*argv - 1), &addrs, &addrno, 0) == DNS_ERROR) {
#ifdef HAVE_HERROR
		herror(gettext("error"));
#else
		usrerror(gettext("Host not found"));
#endif
		return "";
	}

	for (i = 0; i < addrno; i++) {
#ifdef CONFIG_IPV6
		struct sockaddr_in6 addr = *((struct sockaddr_in6 *) &(addrs)[i]);
		unsigned char p[INET6_ADDRSTRLEN];

		if (! inet_ntop(addr.sin6_family,
				(addr.sin6_family == AF_INET6 ? (void *) &addr.sin6_addr
							      : (void *) &((struct sockaddr_in *) &addr)->sin_addr),
				p, INET6_ADDRSTRLEN))
			ERROR(gettext("Resolver error"));
		else
			printf("%s\n", p);
#else
		struct sockaddr_in addr = *((struct sockaddr_in *) &(addrs)[i]);
		unsigned char *p = (unsigned char *) &addr.sin_addr.s_addr;

		printf("%d.%d.%d.%d\n", (int) p[0], (int) p[1],
				        (int) p[2], (int) p[3]);
#endif
	}

	mem_free_if(addrs);

	fflush(stdout);

	return "";
}

#define skipback_whitespace(start, S) \
	while ((start) < (S) && isspace((S)[-1])) (S)--;

static unsigned char *
remote_cmd(struct option *o, unsigned char ***argv, int *argc)
{
	struct {
		unsigned char *name;
		enum {
			REMOTE_METHOD_OPENURL,
			REMOTE_METHOD_PING,
			REMOTE_METHOD_XFEDOCOMMAND,
			REMOTE_METHOD_ADDBOOKMARK,
			REMOTE_METHOD_INFOBOX,
			REMOTE_METHOD_NOT_SUPPORTED,
		} type;
	} remote_methods[] = {
		{ "openURL",	  REMOTE_METHOD_OPENURL },
		{ "ping",	  REMOTE_METHOD_PING },
		{ "addBookmark",  REMOTE_METHOD_ADDBOOKMARK },
		{ "infoBox",	  REMOTE_METHOD_INFOBOX },
		{ "xfeDoCommand", REMOTE_METHOD_XFEDOCOMMAND },
		{ NULL,		  REMOTE_METHOD_NOT_SUPPORTED },
	};
	unsigned char *command, *arg, *argend;
	int method, len = 0;

	if (*argc < 1) return gettext("Parameter expected");

	command = *(*argv);

	while (isasciialpha(command[len]))
		len++;

	/* Find the begining and end of the argument list. */

	arg = command + len;
	skip_space(arg);

	argend = arg + strlen(arg);
	skipback_whitespace(arg, argend);
	if (argend > arg)
		argend--;

	/* Decide whether to use the "extended" --remote format where
	 * all URLs following should be opened in tabs. */
	if (len == 0 || *arg != '(' || *argend != ')') {
		/* Just open any passed URLs in new tabs */
		remote_session_flags |= SES_REMOTE_NEW_TAB;
		return NULL;
	}

	/* Skip parenthesis and surrounding whitespace. */
	arg++;
	skip_space(arg);
	skipback_whitespace(arg, argend);

	for (method = 0; remote_methods[method].name; method++) {
		unsigned char *name = remote_methods[method].name;

		if (!strlcasecmp(command, len, name, -1))
			break;
	}

	switch (remote_methods[method].type) {
	case REMOTE_METHOD_OPENURL:
		if (arg == argend) {
			/* Prompt for a URL with a dialog box */
			remote_session_flags |= SES_REMOTE_PROMPT_URL;
			break;
		}

		len = strcspn(arg, ",)");
		if (arg[len] == ',') {
			unsigned char *where = arg + len + 1;

			if (strstr(where, "new-window")) {
				remote_session_flags |= SES_REMOTE_NEW_WINDOW;

			} else if (strstr(where, "new-tab")) {
				remote_session_flags |= SES_REMOTE_NEW_TAB;

			} else {
				/* Bail out when getting unknown parameter */
				/* TODO: new-screen */
				break;
			}

		} else {
			remote_session_flags |= SES_REMOTE_CURRENT_TAB;
		}

		while (len > 0 && isspace(arg[len - 1])) len--;

		if (len > 1) {
			/* Skip possible string delimiters. Atleast urlview
			 * seems to add them. */
			if ((arg[0] == '\'' && arg[len - 1] == '\'')
			    || (arg[0] == '"' && arg[len - 1] == '"'))
				arg++, len -= 2;
		}

		if (len) remote_url = memacpy(arg, len);

		break;

	case REMOTE_METHOD_XFEDOCOMMAND:
		len = argend - arg;

		if (!strlcasecmp(arg, len, "openBrowser", 11)) {
			remote_session_flags = SES_REMOTE_NEW_WINDOW;
		}
		break;

	case REMOTE_METHOD_PING:
		remote_session_flags = SES_REMOTE_PING;
		break;

	case REMOTE_METHOD_ADDBOOKMARK:
		if (arg == argend) break;
		remote_url = memacpy(arg, argend - arg);
		remote_session_flags = SES_REMOTE_ADD_BOOKMARK;
		break;

	case REMOTE_METHOD_INFOBOX:
		if (arg == argend) break;
		remote_url = memacpy(arg, argend - arg);
		if (remote_url)
			insert_in_string(&remote_url, 0, "about:", 6);
		remote_session_flags = SES_REMOTE_INFO_BOX;
		break;

	case REMOTE_METHOD_NOT_SUPPORTED:
		break;
	}

	/* If no flags was applied it can only mean we are dealing with
	 * unknown method. */
	if (!remote_session_flags)
		return gettext("Remote method not supported");

	(*argv)++; (*argc)--;	/* Consume next argument */

	return NULL;
}

static unsigned char *
version_cmd(struct option *o, unsigned char ***argv, int *argc)
{
	printf("%s\n", full_static_version);
	fflush(stdout);
	return "";
}


/* Below we handle help usage printing.
 *
 * We're trying to achieve several goals here:
 *
 * - Genericly define a function to print option trees iteratively.
 * - Make output parsable for various doc tools (to make manpages).
 * - Do some non generic fancy stuff like printing semi-aliased
 *   options (like: -?, -h and -help) on one line when printing
 *   short help. */

#define gettext_nonempty(x) (*(x) ? gettext(x) : (x))

static void
print_full_help(struct option *tree, unsigned char *path)
{
	struct option *option;
	unsigned char saved[MAX_STR_LEN];
	unsigned char *savedpos = saved;

	*savedpos = 0;

	foreach (option, *tree->value.tree) {
		enum option_type type = option->type;
		unsigned char *help;
		unsigned char *capt = option->capt;
		unsigned char *desc = (option->desc && *option->desc)
				      ? (unsigned char *) gettext(option->desc)
				      : (unsigned char *) "N/A";

		/* Don't print deprecated aliases (if we don't walk command
		 * line options which use aliases for legitimate options). */
		if ((type == OPT_ALIAS && tree != cmdline_options)
		    || (option->flags & OPT_HIDDEN))
			continue;

		if (!capt && !strncasecmp(option->name, "_template_", 10))
			capt = (unsigned char *) N_("Template option folder");

		if (!capt) {
			int len = strlen(option->name);
			int max = MAX_STR_LEN - (savedpos - saved);

			safe_strncpy(savedpos, option->name, max);
			safe_strncpy(savedpos + len, ", -", max - len);
			savedpos += len + 3;
			continue;
		}

		help = gettext_nonempty(option_types[option->type].help_str);

		if (type != OPT_TREE)
			printf("    %s%s%s %s ",
				path, saved, option->name, help);

		/* Print the 'title' of each option type. */
		switch (type) {
			case OPT_BOOL:
			case OPT_INT:
			case OPT_LONG:
				printf(gettext("(default: %ld)"),
					type == OPT_LONG
					? option->value.big_number
					: (long) option->value.number);
				break;

			case OPT_STRING:
				printf(gettext("(default: \"%s\")"),
					option->value.string);
				break;

			case OPT_ALIAS:
				printf(gettext("(alias for %s)"),
					option->value.string);
				break;

			case OPT_CODEPAGE:
				printf(gettext("(default: %s)"),
					get_cp_name(option->value.number));
				break;

			case OPT_COLOR:
			{
				color_T color = option->value.color;
				unsigned char hexcolor[8];

				printf(gettext("(default: %s)"),
				       get_color_string(color, hexcolor));
				break;
			}

			case OPT_COMMAND:
				break;

			case OPT_LANGUAGE:
#ifdef CONFIG_NLS
				printf(gettext("(default: \"%s\")"),
				       language_to_name(option->value.number));
#endif
				break;

			case OPT_TREE:
			{
				int pathlen = strlen(path);
				int namelen = strlen(option->name);

				if (pathlen + namelen + 2 > MAX_STR_LEN)
					continue;

				/* Append option name to path */
				if (pathlen > 0) {
					memcpy(saved, path, pathlen);
					savedpos = saved + pathlen;
				} else {
					savedpos = saved;
				}
				memcpy(savedpos, option->name, namelen + 1);
				savedpos += namelen;

				capt = gettext_nonempty(capt);
				printf("  %s: (%s)", capt, saved);
				break;
			}
		}

		printf("\n    %8s", "");
		{
			int l = strlen(desc);
			int i;

			for (i = 0; i < l; i++) {
				putchar(desc[i]);

				if (desc[i] == '\n')
					printf("    %8s", "");
			}
		}
		printf("\n\n");

		if (option->type == OPT_TREE) {
			memcpy(savedpos, ".", 2);
			print_full_help(option, saved);
		}

		savedpos = saved;
		*savedpos = 0;
	}
}

static void
print_short_help(void)
{
#define ALIGN_WIDTH 20
	struct option *option;
	struct string string = NULL_STRING;
	struct string *saved = NULL;
	unsigned char align[ALIGN_WIDTH];

	/* Initialize @space used to align captions. */
	memset(align, ' ', sizeof(align) - 1);
	align[sizeof(align) - 1] = 0;

	foreach (option, *cmdline_options->value.tree) {
		unsigned char *capt;
		unsigned char *help;
		unsigned char *info = saved ? saved->source
					    : (unsigned char *) "";
		int len = strlen(option->name);

		/* Avoid printing compatibility options */
		if (option->flags & OPT_HIDDEN)
			continue;

		/* When no caption is available the option name is 'stacked'
		 * and the caption is shared with next options that has one. */
		if (!option->capt) {
			if (!saved) {
				if (!init_string(&string))
					continue;

				saved = &string;
			}

			add_to_string(saved, option->name);
			add_to_string(saved, ", -");
			continue;
		}

		capt = gettext_nonempty(option->capt);
		help = gettext_nonempty(option_types[option->type].help_str);

		/* When @help string is non empty align at least one space. */
		len = ALIGN_WIDTH - len - strlen(help);
		len -= (saved ? saved->length : 0);
		len = (len < 0) ? !!(*help) : len;

		align[len] = '\0';
		printf("  -%s%s %s%s%s\n",
		       info, option->name, help, align, capt);
		align[len] = ' ';
		if (saved) {
			done_string(saved);
			saved = NULL;
		}
	}
#undef ALIGN_WIDTH
}

#undef gettext_nonempty

static unsigned char *
printhelp_cmd(struct option *option, unsigned char ***argv, int *argc)
{
	unsigned char *lineend = strchr(full_static_version, '\n');

	if (lineend) *lineend = '\0';

	printf("%s\n\n", full_static_version);

	if (!strcmp(option->name, "config-help")) {
		printf("%s:\n", gettext("Configuration options"));
		print_full_help(config_options, "");
	} else {
		printf("%s\n\n%s:\n",
		       gettext("Usage: elinks [OPTION]... [URL]..."),
		       gettext("Options"));
		if (!strcmp(option->name, "long-help")) {
			print_full_help(cmdline_options, "-");
		} else {
			print_short_help();
		}
	}

	fflush(stdout);
	return "";
}

static unsigned char *
redir_cmd(struct option *option, unsigned char ***argv, int *argc)
{
	unsigned char *target;

	/* I can't get any dirtier. --pasky */

	if (!strcmp(option->name, "confdir")) {
		target = "config-dir";
	} else if (!strcmp(option->name, "conffile")) {
		target = "config-file";
	} else if (!strcmp(option->name, "stdin")) {
		static int complained;

		if (complained)
			return NULL;
		complained = 1;

		/* Emulate bool option, possibly eating following 0/1. */
		if ((*argv)[0]
		    && ((*argv)[0][0] == '0' || (*argv)[0][0] == '1')
		    && !(*argv)[0][1])
			(*argv)++, (*argc)--;
		fprintf(stderr, "Warning: Deprecated option -stdin used!\n");
		fprintf(stderr, "ELinks now determines the -stdin option value automatically.\n");
		fprintf(stderr, "In the future versions ELinks will report error when you will\n");
		fprintf(stderr, "continue to use this option.\a\n");
		return NULL;

	} else {
		return gettext("Internal consistency error");
	}

	option = get_opt_rec(cmdline_options, target);
	assert(option);
	option_types[option->type].cmdline(option, argv, argc);
	return NULL;
}

static unsigned char *
printconfigdump_cmd(struct option *option, unsigned char ***argv, int *argc)
{
	unsigned char *config_string;

	/* Print all. */
	get_opt_int("config.saving_style") = 2;

	config_string = create_config_string("", "", config_options);
	if (config_string) {
		printf("%s", config_string);
		mem_free(config_string);
	}

	fflush(stdout);
	return "";
}


/**********************************************************************
 Options values
**********************************************************************/

/* Keep options in alphabetical order. */

struct option_info cmdline_options_info[] = {
	/* [gettext_accelerator_context(IGNORE)] */
	INIT_OPT_BOOL("", N_("Restrict to anonymous mode"),
		"anonymous", 0, 0,
		N_("Restricts ELinks so it can run on an anonymous account.\n"
		"Local file browsing, downloads, and modification of options\n"
		"will be disabled. Execution of viewers is allowed, but entries\n"
		"in the association table can't be added or modified.")),

	INIT_OPT_BOOL("", N_("Autosubmit first form"),
		"auto-submit", 0, 0,
		N_("Automatically submit the first form in the given URLs.")),

	INIT_OPT_INT("", N_("Clone internal session with given ID"),
		"base-session", 0, 0, INT_MAX, 0,
		N_("Used internally when opening ELinks instances in new windows.\n"
		"The ID maps to information that will be used when creating the\n"
		"new instance. You don't want to use it.")),

	INIT_OPT_COMMAND("", NULL, "confdir", OPT_HIDDEN, redir_cmd, NULL),

	INIT_OPT_STRING("", N_("Name of directory with configuration file"),
		"config-dir", 0, "",
		N_("Path of the directory ELinks will read and write its\n"
		"config and runtime state files to instead of ~/.elinks.\n"
		"If the path does not begin with a '/' it is assumed to be\n"
		"relative to your HOME directory.")),

	INIT_OPT_COMMAND("", N_("Print default configuration file to stdout"),
		"config-dump", 0, printconfigdump_cmd,
		N_("Print a configuration file with options set to the built-in\n"
		"defaults to stdout.")),

	INIT_OPT_COMMAND("", NULL, "conffile", OPT_HIDDEN, redir_cmd, NULL),

	INIT_OPT_STRING("", N_("Name of configuration file"),
		"config-file", 0, "elinks.conf",
		N_("Name of the configuration file that all configuration\n"
		"options will be read from and written to. It should be\n"
		"relative to config-dir.")),

	INIT_OPT_COMMAND("", N_("Print help for configuration options"),
		"config-help", 0, printhelp_cmd,
		N_("Print help for configuration options and exit.")),

	INIT_OPT_CMDALIAS("", N_("MIME type assumed for unknown document types"),
		"default-mime-type", 0, "mime.default_type",
		N_("The default MIME type used for documents of unknown type.")),

	INIT_OPT_BOOL("", N_("Ignore user-defined keybindings"),
		"default-keys", 0, 0,
		N_("When set, all keybindings from configuration files will be\n"
		"ignored. It forces use of default keybindings and will reset\n"
		"user-defined ones on save.")),

	INIT_OPT_BOOL("", N_("Print formatted versions of given URLs to stdout"),
		"dump", 0, 0,
		N_("Print formatted plain-text versions of given URLs to stdout.")),

	INIT_OPT_CMDALIAS("", N_("Codepage to use with -dump"),
		"dump-charset", 0, "document.dump.codepage",
		N_("Codepage used when formatting dump output.")),

	INIT_OPT_CMDALIAS("", N_("Color mode used with -dump"),
		"dump-color-mode", 0, "document.dump.color_mode",
		N_("Color mode used with -dump.")),

	INIT_OPT_CMDALIAS("", N_("Width of document formatted with -dump"),
		"dump-width", 0, "document.dump.width",
		N_("Width of the dump output.")),

	INIT_OPT_COMMAND("", N_("Evaluate configuration file directive"),
		"eval", 0, eval_cmd,
		N_("Specify configuration file directives on the command-line\n"
		"which will be evaluated after all configuration files has been\n"
		"read. Example usage:\n"
		"\t-eval 'set protocol.file.allow_special_files = 1'")),

	/* lynx compatibility */
	INIT_OPT_COMMAND("", N_("Interpret documents of unknown types as HTML"),
		"force-html", 0, forcehtml_cmd,
		N_("Makes ELinks assume documents of unknown types are HTML.\n"
		"Useful when using ELinks as an external viewer from MUAs.\n"
		"This is equivalent to -default-mime-type text/html.")),

	/* XXX: -?, -h and -help share the same caption and should be kept in
	 * the current order for usage help printing to be ok */
	INIT_OPT_COMMAND("", NULL, "?", 0, printhelp_cmd, NULL),

	INIT_OPT_COMMAND("", NULL, "h", 0, printhelp_cmd, NULL),

	INIT_OPT_COMMAND("", N_("Print usage help and exit"),
		"help", 0, printhelp_cmd,
		N_("Print usage help and exit.")),

	INIT_OPT_BOOL("", N_("Only permit local connections"),
		"localhost", 0, 0,
		N_("Restricts ELinks to work offline and only connect to servers\n"
		"with local addresses (ie. 127.0.0.1). No connections to remote\n"
		"servers will be permitted.")),

	INIT_OPT_COMMAND("", N_("Print detailed usage help and exit"),
		"long-help", 0, printhelp_cmd,
		N_("Print detailed usage help and exit.")),

	INIT_OPT_COMMAND("", N_("Look up specified host"),
		"lookup", 0, lookup_cmd,
		N_("Look up specified host and print all DNS resolved IP addresses.")),

	INIT_OPT_BOOL("", N_("Run as separate instance"),
		"no-connect", 0, 0,
		N_("Run ELinks as a separate instance instead of connecting to an\n"
		"existing instance. Note that normally no runtime state files\n"
		"(bookmarks, history, etc.) are written to the disk when this\n"
		"option is used. See also -touch-files.")),

	INIT_OPT_BOOL("", N_("Disable use of files in ~/.elinks"),
		"no-home", 0, 0,
		N_("Disables creation and use of files in the user specific home\n"
		"configuration directory (~/.elinks). It forces default configuration\n"
		"values to be used and disables saving of runtime state files.")),

	INIT_OPT_CMDALIAS("", N_("Disable link numbering in dump output"),
		"no-numbering", OPT_ALIAS_NEGATE, "document.dump.numbering",
		N_("Prevents printing of link number in dump output.\n"
		"Note that this really affects only -dump, nothing else.")),

	INIT_OPT_CMDALIAS("", N_("Disable printing of link references in dump output"),
		"no-references", OPT_ALIAS_NEGATE, "document.dump.references",
		N_("Prevents printing of references (URIs) of document links\n"
		"in dump output.\n"
		"Note that this really affects only -dump, nothing else.")),

	INIT_OPT_COMMAND("", N_("Control an already running ELinks"),
		"remote", 0, remote_cmd,
		N_("Control a remote ELinks instance by passing commands to it.\n"
		"The option takes an additional argument containing the method\n"
		"which should be invoked and any parameters that should be passed\n"
		"to it. For ease of use, the additional method argument can be\n"
		"omitted in which case any URL arguments will be opened in new\n"
		"tabs in the remote instance.\n"
		"Following is a list of the supported methods:\n"
		"\tping()                    : look for a remote instance\n"
		"\topenURL()                 : prompt URL in current tab\n"
		"\topenURL(URL)              : open URL in current tab\n"
		"\topenURL(URL, new-tab)     : open URL in new tab\n"
		"\topenURL(URL, new-window)  : open URL in new window\n"
		"\taddBookmark(URL)          : bookmark URL\n"
		"\tinfoBox(text)             : show text in a message box\n"
		"\txfeDoCommand(openBrowser) : open new window")),

	INIT_OPT_INT("", N_("Connect to session ring with given ID"),
		"session-ring", 0, 0, INT_MAX, 0,
		N_("ID of session ring this ELinks session should connect to. ELinks\n"
		"works in so-called session rings, whereby all instances of ELinks\n"
		"are interconnected and share state (cache, bookmarks, cookies,\n"
		"and so on). By default, all ELinks instances connect to session\n"
		"ring 0. You can change that behaviour with this switch and form as\n"
		"many session rings as you want. Obviously, if the session-ring with\n"
		"this number doesn't exist yet, it's created and this ELinks instance\n"
		"will become the master instance (that usually doesn't matter for you\n"
		"as a user much). Note that you usually don't want to use this unless\n"
		"you're a developer and you want to do some testing - if you want the\n"
		"ELinks instances each running standalone, rather use the -no-connect\n"
		"command-line option. Also note that normally no runtime state files\n"
		"are written to the disk when this option is used. See also\n"
		"-touch-files.")),

	INIT_OPT_BOOL("", N_("Print the source of given URLs to stdout"),
		"source", 0, 0,
		N_("Print given URLs in source form to stdout.")),

	INIT_OPT_COMMAND("", NULL, "stdin", OPT_HIDDEN, redir_cmd, NULL),

	INIT_OPT_BOOL("", N_("Touch files in ~/.elinks when running with -no-connect/-session-ring"),
		"touch-files", 0, 0,
		N_("When enabled, runtime state files (bookmarks, history, etc.) are\n"
		"written to disk, even when -no-connect or -session-ring is used.\n"
		"The option has no effect if not used in conjunction with any of\n"
		"these options.")),

	INIT_OPT_INT("", N_("Verbose level"),
		"verbose", 0, 0, VERBOSE_LEVELS - 1, VERBOSE_WARNINGS,
		N_("The verbose level controls what messages are shown at\n"
		"start up and while running:\n"
		"\t0 means only show serious errors\n"
		"\t1 means show serious errors and warnings\n"
		"\t2 means show all messages")),

	INIT_OPT_COMMAND("", N_("Print version information and exit"),
		"version", 0, version_cmd,
		N_("Print ELinks version information and exit.")),

	NULL_OPTION_INFO,
};