// SPDX-License-Identifier: GPL-2.0+
/* nmcli - command-line tool to control NetworkManager
 *
 * Jiri Klimes <jklimes@redhat.com>
 *
 * Copyright 2010 - 2018 Red Hat, Inc.
 */

#include "nm-default.h"

#include "nmcli.h"

#include <stdio.h>
#include <stdlib.h>
#include <signal.h>
#include <termios.h>
#include <unistd.h>
#include <locale.h>
#include <glib-unix.h>
#include <readline/readline.h>
#include <readline/history.h>

#include "nm-client-utils.h"

#include "polkit-agent.h"
#include "utils.h"
#include "common.h"
#include "connections.h"
#include "devices.h"
#include "general.h"
#include "agent.h"
#include "settings.h"

#if defined(NM_DIST_VERSION)
# define NMCLI_VERSION NM_DIST_VERSION
#else
# define NMCLI_VERSION VERSION
#endif

#define DEFAULT_PALETTE_INIT \
	[NM_META_COLOR_CONNECTION_ACTIVATED]     = "32", \
	[NM_META_COLOR_CONNECTION_ACTIVATING]    = "33", \
	[NM_META_COLOR_CONNECTION_DISCONNECTING] = "31", \
	[NM_META_COLOR_CONNECTION_INVISIBLE]     =  "2", \
	[NM_META_COLOR_CONNECTIVITY_FULL]        = "32", \
	[NM_META_COLOR_CONNECTIVITY_LIMITED]     = "33", \
	[NM_META_COLOR_CONNECTIVITY_NONE]        = "31", \
	[NM_META_COLOR_CONNECTIVITY_PORTAL]      = "33", \
	[NM_META_COLOR_DEVICE_ACTIVATED]         = "32", \
	[NM_META_COLOR_DEVICE_ACTIVATING]        = "33", \
	[NM_META_COLOR_DEVICE_DISCONNECTED]      = "31", \
	[NM_META_COLOR_DEVICE_FIRMWARE_MISSING]  = "31", \
	[NM_META_COLOR_DEVICE_PLUGIN_MISSING]    = "31", \
	[NM_META_COLOR_DEVICE_UNAVAILABLE]       =  "2", \
	[NM_META_COLOR_DEVICE_DISABLED]          = "31", \
	[NM_META_COLOR_MANAGER_RUNNING]          = "32", \
	[NM_META_COLOR_MANAGER_STARTING]         = "33", \
	[NM_META_COLOR_MANAGER_STOPPED]          = "31", \
	[NM_META_COLOR_PERMISSION_AUTH]          = "33", \
	[NM_META_COLOR_PERMISSION_NO]            = "31", \
	[NM_META_COLOR_PERMISSION_YES]           = "32", \
	[NM_META_COLOR_STATE_ASLEEP]             = "31", \
	[NM_META_COLOR_STATE_CONNECTED_GLOBAL]   = "32", \
	[NM_META_COLOR_STATE_CONNECTED_LOCAL]    = "32", \
	[NM_META_COLOR_STATE_CONNECTED_SITE]     = "32", \
	[NM_META_COLOR_STATE_CONNECTING]         = "33", \
	[NM_META_COLOR_STATE_DISCONNECTED]       = "31", \
	[NM_META_COLOR_STATE_DISCONNECTING]      = "33", \
	[NM_META_COLOR_WIFI_SIGNAL_EXCELLENT]    = "32", \
	[NM_META_COLOR_WIFI_SIGNAL_FAIR]         = "35", \
	[NM_META_COLOR_WIFI_SIGNAL_GOOD]         = "33", \
	[NM_META_COLOR_WIFI_SIGNAL_POOR]         = "36", \
	[NM_META_COLOR_WIFI_SIGNAL_UNKNOWN]      =  "2", \
	[NM_META_COLOR_ENABLED]                  = "32", \
	[NM_META_COLOR_DISABLED]                 = "31", \

NmCli nm_cli = {
	.client = NULL,

	.return_value = NMC_RESULT_SUCCESS,

	.timeout = -1,

	.secret_agent = NULL,
	.pwds_hash = NULL,
	.pk_listener = NULL,

	.should_wait = 0,
	.nowait_flag = TRUE,
	.nmc_config.print_output = NMC_PRINT_NORMAL,
	.nmc_config.multiline_output = FALSE,
	.mode_specified = FALSE,
	.nmc_config.escape_values = TRUE,
	.required_fields = NULL,
	.ask = FALSE,
	.complete = FALSE,
	.nmc_config.show_secrets = FALSE,
	.nmc_config.in_editor = FALSE,
	.nmc_config.palette = {
		DEFAULT_PALETTE_INIT
	},
	.editor_status_line = FALSE,
	.editor_save_confirmation = TRUE,
};

/*****************************************************************************/

typedef struct {
	NmCli *nmc;
	int argc;
	char **argv;
} ArgsInfo;

/* --- Global variables --- */
GMainLoop *loop = NULL;
struct termios termios_orig;

NM_CACHED_QUARK_FCN ("nmcli-error-quark", nmcli_error_quark)

static void
complete_field_setting (GHashTable *h, NMMetaSettingType setting_type)
{
	const NMMetaSettingInfoEditor *setting_info = &nm_meta_setting_infos_editor[setting_type];
	guint i;

	for (i = 0; i < setting_info->properties_num; i++) {
		g_hash_table_add (h, g_strdup_printf ("%s.%s",
		                                      setting_info->general->setting_name,
		                                      setting_info->properties[i]->property_name));
	}
}

static void
complete_field (GHashTable *h, const NmcMetaGenericInfo *const*field)
{
	int i;

	for (i = 0; field[i]; i++)
		g_hash_table_add (h, g_strdup (field[i]->name));
}

static void
complete_one (gpointer key, gpointer value, gpointer user_data)
{
	const char **option_with_value = user_data;
	const char *option = option_with_value[0];
	const char *prefix = option_with_value[1];
	const char *name = key;
	const char *last;

	last = strrchr (prefix, ',');
	if (last)
		last++;
	else
		last = prefix;

	if ((!*last && !strchr (name, '.')) || matches (last, name)) {
		if (option != prefix) {
			/* value prefix was not a standalone argument,
			 * it was part of --option=<value> argument.
			 * Repeat the part leading to "=". */
			g_print ("%s=", option);
		}
		g_print ("%.*s%s%s\n", (int)(last-prefix), prefix, name,
		                       strcmp (last, name) == 0 ? "," : "");
	}
}

static void
complete_fields (const char *option, const char *prefix)
{
	guint i;
	GHashTable *h;
	const char *option_with_value[2] = { option, prefix };

	h = g_hash_table_new_full (nm_str_hash, g_str_equal, g_free, NULL);

	complete_field (h, metagen_ip4_config);
	complete_field (h, metagen_dhcp_config);
	complete_field (h, metagen_ip6_config);
	complete_field (h, metagen_con_show);
	complete_field (h, metagen_con_active_general);
	complete_field (h, metagen_con_active_vpn);
	complete_field (h, nmc_fields_con_active_details_groups);
	complete_field (h, metagen_device_status);
	complete_field (h, metagen_device_detail_general);
	complete_field (h, metagen_device_detail_connections);
	complete_field (h, metagen_device_detail_capabilities);
	complete_field (h, metagen_device_detail_wired_properties);
	complete_field (h, metagen_device_detail_wifi_properties);
	complete_field (h, metagen_device_detail_wimax_properties);
	complete_field (h, nmc_fields_dev_wifi_list);
	complete_field (h, nmc_fields_dev_wimax_list);
	complete_field (h, nmc_fields_dev_show_master_prop);
	complete_field (h, nmc_fields_dev_show_team_prop);
	complete_field (h, nmc_fields_dev_show_vlan_prop);
	complete_field (h, nmc_fields_dev_show_bluetooth);
	complete_field (h, nmc_fields_dev_show_sections);
	complete_field (h, nmc_fields_dev_lldp_list);

	for (i = 0; i < _NM_META_SETTING_TYPE_NUM; i++)
		complete_field_setting (h, i);

	g_hash_table_foreach (h, complete_one, (gpointer) &option_with_value[0]);
	g_hash_table_destroy (h);
}

static void
complete_option_with_value (const char *option, const char *prefix, ...)
{
	va_list args;
	const char *candidate;

	va_start (args, prefix);
	while ((candidate = va_arg (args, const char *))) {
		if (!*prefix || matches (prefix, candidate)) {
			if (option != prefix) {
				/* value prefix was not a standalone argument,
				 * it was part of --option=<value> argument.
				 * Repeat the part leading to "=". */
				g_print ("%s=", option);
			}
			g_print ("%s\n", candidate);
		}
	}
	va_end (args);
}

static void
usage (void)
{
	g_printerr (_("Usage: nmcli [OPTIONS] OBJECT { COMMAND | help }\n"
	              "\n"
	              "OPTIONS\n"
	              "  -a, --ask                                ask for missing parameters\n"
	              "  -c, --colors auto|yes|no                 whether to use colors in output\n"
	              "  -e, --escape yes|no                      escape columns separators in values\n"
	              "  -f, --fields <field,...>|all|common      specify fields to output\n"
	              "  -g, --get-values <field,...>|all|common  shortcut for -m tabular -t -f\n"
	              "  -h, --help                               print this help\n"
	              "  -m, --mode tabular|multiline             output mode\n"
	              "  -o, --overview                           overview mode\n"
	              "  -p, --pretty                             pretty output\n"
	              "  -s, --show-secrets                       allow displaying passwords\n"
	              "  -t, --terse                              terse output\n"
	              "  -v, --version                            show program version\n"
	              "  -w, --wait <seconds>                     set timeout waiting for finishing operations\n"
	              "\n"
	              "OBJECT\n"
	              "  g[eneral]       NetworkManager's general status and operations\n"
	              "  n[etworking]    overall networking control\n"
	              "  r[adio]         NetworkManager radio switches\n"
	              "  c[onnection]    NetworkManager's connections\n"
	              "  d[evice]        devices managed by NetworkManager\n"
	              "  a[gent]         NetworkManager secret agent or polkit agent\n"
	              "  m[onitor]       monitor NetworkManager changes\n"
	              "\n"));
}

static const NMCCommand nmcli_cmds[] = {
	{ "general",     do_general,      NULL,   FALSE,  FALSE },
	{ "monitor",     do_monitor,      NULL,   TRUE,   FALSE },
	{ "networking",  do_networking,   NULL,   FALSE,  FALSE },
	{ "radio",       do_radio,        NULL,   FALSE,  FALSE },
	{ "connection",  do_connections,  NULL,   FALSE,  FALSE },
	{ "device",      do_devices,      NULL,   FALSE,  FALSE },
	{ "agent",       do_agent,        NULL,   FALSE,  FALSE },
	{ NULL,          do_overview,     usage,  TRUE,   TRUE },
};

static gboolean
matches_arg (NmCli *nmc, int *argc, char ***argv, const char *pattern, char **arg)
{
	char *opt = *argv[0];

	if (nmc->return_value != NMC_RESULT_SUCCESS) {
		/* Don't process further matches if there has been an error. */
		return FALSE;
	}

	if (opt[1] == '-') {
		/* We know one '-' was already seen by the caller.
		 * Skip it if there's a second one*/
		opt++;
	}

	if (arg) {
		/* If there's a "=" separator, replace it with NUL so that matches()
		 * works and consider the part after it to be the arguemnt's value. */
		*arg = strchr (opt, '=');
		if (*arg) {
			**arg = '\0';
			(*arg)++;
		}
	}

	if (!matches (opt, pattern)) {
		if (arg && *arg) {
			/* Back off the replacement of "=". */
			(*arg)--;
			**arg = '=';
		}
		return FALSE;
	}

	if (arg && !*arg) {
		/* We need a value, but the option didn't contain a "=<value>" part.
		 * Proceed to the next argument. */
		(*argc)--;
		(*argv)++;
		if (!*argc) {
			g_string_printf (nmc->return_text, _("Error: missing argument for '%s' option."), opt);
			nmc->return_value = NMC_RESULT_ERROR_USER_INPUT;
			return FALSE;
		}
		*arg = *argv[0];
	}

	return TRUE;
}

/*************************************************************************************/

typedef enum {
        NMC_USE_COLOR_AUTO,
        NMC_USE_COLOR_YES,
        NMC_USE_COLOR_NO,
} NmcColorOption;

static char *
check_colors_construct_filename (const char *base_dir,
                                 const char *name,
                                 const char *term,
                                 const char *type)
{
	return g_strdup_printf ("%s/terminal-colors.d/%s%s%s%s%s",
	                        base_dir,
	                        name ? name : "",
	                        term ? "@" : "", term ? term : "",
	                        (name || term) ? "." : "",
	                        type);
}

static NmcColorOption
check_colors_check_enabled_one_file (const char *base_dir,
                                     const char *name,
                                     const char *term)
{
	gs_free char *filename_e = NULL;
	gs_free char *filename_d = NULL;

	filename_e = check_colors_construct_filename (base_dir, name, term, "enable");
	if (g_file_test (filename_e, G_FILE_TEST_EXISTS))
		return NMC_USE_COLOR_YES;

	filename_d = check_colors_construct_filename (base_dir, name, term, "disable");
	if (g_file_test (filename_d, G_FILE_TEST_EXISTS))
		return NMC_USE_COLOR_NO;

	return NMC_USE_COLOR_AUTO;
}

static char *
check_colors_check_palette_one_file (const char *base_dir,
                                     const char *name,
                                     const char *term)
{
	gs_free char *filename = check_colors_construct_filename (base_dir, name, term, "schem");
	char *contents;

	if (g_file_get_contents (filename, &contents, NULL, NULL))
		return contents;
	return NULL;
}

static gboolean
check_colors_check_enabled (const char *base_dir_1, const char *base_dir_2, const char *name, const char *term)
{
	int i;

	if (term && strchr (term, '/'))
		term = NULL;

#define CHECK_AND_RETURN(cmd) \
	G_STMT_START { \
		NmcColorOption _color_option; \
		\
		_color_option = (cmd); \
		if (_color_option != NMC_USE_COLOR_AUTO) \
			return _color_option == NMC_USE_COLOR_YES; \
	} G_STMT_END

	for (i = 0; i < 2; i++) {
		const char *base_dir = (i == 0 ? base_dir_1 : base_dir_2);

		if (!base_dir)
			continue;
		if (name && term)
			CHECK_AND_RETURN (check_colors_check_enabled_one_file (base_dir, name, term));
		if (name)
			CHECK_AND_RETURN (check_colors_check_enabled_one_file (base_dir, name, NULL));
		if (term)
			CHECK_AND_RETURN (check_colors_check_enabled_one_file (base_dir, NULL, term));
		if (TRUE)
			CHECK_AND_RETURN (check_colors_check_enabled_one_file (base_dir, NULL, NULL));
	}
#undef CHECK_AND_RETURN
	return TRUE;
}

static char *
check_colors_check_palette (const char *base_dir_1, const char *base_dir_2, const char *name, const char *term)
{
	int i;

	if (term && strchr (term, '/'))
		term = NULL;

#define CHECK_AND_RETURN(cmd) \
	G_STMT_START { \
		char *_palette; \
		\
		_palette = (cmd); \
		if (_palette) \
			return _palette; \
	} G_STMT_END

	for (i = 0; i < 2; i++) {
		const char *base_dir = (i == 0 ? base_dir_1 : base_dir_2);

		if (!base_dir)
			continue;
		if (name && term)
			CHECK_AND_RETURN (check_colors_check_palette_one_file (base_dir, name, term));
		if (name)
			CHECK_AND_RETURN (check_colors_check_palette_one_file (base_dir, name, NULL));
		if (term)
			CHECK_AND_RETURN (check_colors_check_palette_one_file (base_dir, NULL, term));
		if (TRUE)
			CHECK_AND_RETURN (check_colors_check_palette_one_file (base_dir, NULL, NULL));
	}
#undef CHECK_AND_RETURN
	return NULL;
}

static gboolean
check_colors (NmcColorOption color_option,
              char **out_palette_str)
{
	const char *base_dir_1, *base_dir_2;
	const char *const NAME = "nmcli";
	const char *term;

	*out_palette_str = NULL;

	if (!NM_IN_SET (color_option, NMC_USE_COLOR_AUTO, NMC_USE_COLOR_YES)) {
		/* nothing to do. Colors are disabled. */
		return FALSE;
	}

	term = g_getenv ("TERM");

	if (color_option == NMC_USE_COLOR_AUTO) {
		if (   nm_streq0 (term, "dumb")
		    || !isatty (STDOUT_FILENO))
			return FALSE;
	}

	base_dir_1 = g_get_user_config_dir ();
	base_dir_2 = ""SYSCONFDIR;

	if (base_dir_1) {
		if (   nm_streq (base_dir_1, base_dir_2)
		    || !g_file_test (base_dir_1, G_FILE_TEST_EXISTS))
			base_dir_1 = NULL;
	}
	if (!g_file_test (base_dir_2, G_FILE_TEST_EXISTS))
		base_dir_2 = NULL;

	if (   color_option == NMC_USE_COLOR_AUTO
	    && !check_colors_check_enabled (base_dir_1, base_dir_2, NAME, term))
		return FALSE;

	*out_palette_str = check_colors_check_palette (base_dir_1, base_dir_2, NAME, term);
	return TRUE;
}

static const char *
resolve_color_alias (const char *color)
{
	static const struct {
		const char *name;
		const char *alias;
	} aliases[] = {
		{ "reset",        "0" },
		{ "bold",         "1" },
		{ "white",        "1;37" },
		{ "halfbright",   "2" },
		{ "underscore",   "4" },
		{ "blink",        "5" },
		{ "reverse",      "7" },
		{ "black",        "30" },
		{ "red",          "31" },
		{ "green",        "32" },
		{ "brown",        "33" },
		{ "yellow",       "33" }, /* well, yellow */
		{ "blue",         "34" },
		{ "magenta",      "35" },
		{ "cyan",         "36" },
		{ "gray",         "37" },
		{ "darkgray",     "90" },
		{ "lightred",     "91" },
		{ "lightgreen",   "92" },
		{ "lightblue",    "94" },
		{ "lightmagenta", "95" },
		{ "lightcyan",    "96" },
		{ "lightgray",    "97" },
	};
	int i;

	/* Shortcut literal sequences. */
	if (g_ascii_isdigit (*color))
		return color;

	for (i = 0; i < G_N_ELEMENTS (aliases); i++) {
		if (strcmp (color, aliases[i].name) == 0)
			return aliases[i].alias;
	}

	return color;
}

static gboolean
parse_color_scheme (char *palette_buffer,
                    const char **palette /* _NM_META_COLOR_NUM elements */,
                    GError **error)
{
	char *p = palette_buffer;
	const char *name;
	const char *color;
	const char *tmp_palette[_NM_META_COLOR_NUM] = {
		DEFAULT_PALETTE_INIT
	};
	static const char *const map[_NM_META_COLOR_NUM] = {
		[NM_META_COLOR_NONE]                     = NULL,
		[NM_META_COLOR_CONNECTION_ACTIVATED]     = "connection-activated",
		[NM_META_COLOR_CONNECTION_ACTIVATING]    = "connection-activating",
		[NM_META_COLOR_CONNECTION_DISCONNECTING] = "connection-disconnecting",
		[NM_META_COLOR_CONNECTION_INVISIBLE]     = "connection-invisible",
		[NM_META_COLOR_CONNECTION_UNKNOWN]       = "connection-unknown",
		[NM_META_COLOR_CONNECTIVITY_FULL]        = "connectivity-full",
		[NM_META_COLOR_CONNECTIVITY_LIMITED]     = "connectivity-limited",
		[NM_META_COLOR_CONNECTIVITY_NONE]        = "connectivity-none",
		[NM_META_COLOR_CONNECTIVITY_PORTAL]      = "connectivity-portal",
		[NM_META_COLOR_CONNECTIVITY_UNKNOWN]     = "connectivity-unknown",
		[NM_META_COLOR_DEVICE_ACTIVATED]         = "device-activated",
		[NM_META_COLOR_DEVICE_ACTIVATING]        = "device-activating",
		[NM_META_COLOR_DEVICE_DISCONNECTED]      = "device-disconnected",
		[NM_META_COLOR_DEVICE_FIRMWARE_MISSING]  = "device-firmware-missing",
		[NM_META_COLOR_DEVICE_PLUGIN_MISSING]    = "device-plugin-missing",
		[NM_META_COLOR_DEVICE_UNAVAILABLE]       = "device-unavailable",
		[NM_META_COLOR_DEVICE_DISABLED]          = "device-disabled",
		[NM_META_COLOR_DEVICE_UNKNOWN]           = "device-unknown",
		[NM_META_COLOR_MANAGER_RUNNING]          = "manager-running",
		[NM_META_COLOR_MANAGER_STARTING]         = "manager-starting",
		[NM_META_COLOR_MANAGER_STOPPED]          = "manager-stopped",
		[NM_META_COLOR_PERMISSION_AUTH]          = "permission-auth",
		[NM_META_COLOR_PERMISSION_NO]            = "permission-no",
		[NM_META_COLOR_PERMISSION_UNKNOWN]       = "permission-unknown",
		[NM_META_COLOR_PERMISSION_YES]           = "permission-yes",
		[NM_META_COLOR_PROMPT]                   = "prompt",
		[NM_META_COLOR_STATE_ASLEEP]             = "state-asleep",
		[NM_META_COLOR_STATE_CONNECTED_GLOBAL]   = "state-connected-global",
		[NM_META_COLOR_STATE_CONNECTED_LOCAL]    = "state-connected-local",
		[NM_META_COLOR_STATE_CONNECTED_SITE]     = "state-connected-site",
		[NM_META_COLOR_STATE_CONNECTING]         = "state-connecting",
		[NM_META_COLOR_STATE_DISCONNECTED]       = "state-disconnected",
		[NM_META_COLOR_STATE_DISCONNECTING]      = "state-disconnecting",
		[NM_META_COLOR_STATE_UNKNOWN]            = "state-unknown",
		[NM_META_COLOR_WIFI_SIGNAL_EXCELLENT]    = "wifi-signal-excellent",
		[NM_META_COLOR_WIFI_SIGNAL_FAIR]         = "wifi-signal-fair",
		[NM_META_COLOR_WIFI_SIGNAL_GOOD]         = "wifi-signal-good",
		[NM_META_COLOR_WIFI_SIGNAL_POOR]         = "wifi-signal-poor",
		[NM_META_COLOR_WIFI_SIGNAL_UNKNOWN]      = "wifi-signal-unknown",
		[NM_META_COLOR_DISABLED]                 = "disabled",
		[NM_META_COLOR_ENABLED]                  = "enabled",
	};
	int i;

	/* This reads through the raw color scheme file contents, identifying the
	 * color names and sequences, putting in terminating NULs in place, so that
	 * pointers into the buffer can readily be used as strings in the palette. */
	while (1) {
		/* Leading whitespace. */
		while (nm_utils_is_separator (*p) || *p == '\n')
			p++;

		if (*p == '\0')
			break;

		/* Comments. */
		if (*p == '#') {
			while (*p != '\n' && *p != '\0')
				p++;
			continue;
		}

		/* Color name. */
		name = p;
		while (g_ascii_isgraph (*p))
			p++;
		if (*p == '\0') {
			g_set_error (error, NMCLI_ERROR, 0,
			             _("Unexpected end of file following '%s'\n"), name);
			return FALSE;
		}

		/* Separating whitespace. */
		if (!nm_utils_is_separator (*p)) {
			*p = '\0';
			g_set_error (error, NMCLI_ERROR, 0,
			             _("Expected whitespace following '%s'\n"), name);
			return FALSE;
		}
		while (nm_utils_is_separator (*p)) {
			*p = '\0';
			p++;
		}

		/* Color sequence. */
		color = p;
		if (!g_ascii_isgraph (*p)) {
			g_set_error (error, NMCLI_ERROR, 0,
			             _("Expected a value for '%s'\n"), name);
			return FALSE;
		}
		while (g_ascii_isgraph (*p))
			p++;

		/* Trailing whitespace. */
		while (nm_utils_is_separator (*p)) {
			*p = '\0';
			p++;
		}
		if (*p != '\0') {
			if (*p != '\n') {
				g_set_error (error, NMCLI_ERROR, 0,
				             _("Expected a line break following '%s'\n"), color);
				return FALSE;
			}
			*p = '\0';
			p++;
		}

		/* All good, set the palette entry. */
		for (i = NM_META_COLOR_NONE + 1; i < _NM_META_COLOR_NUM; i++) {
			if (strcmp (map[i], name) == 0) {
				tmp_palette[i] = resolve_color_alias (color);
				break;
			}
		}
		if (i == _NM_META_COLOR_NUM)
			g_debug ("Ignoring an unrecognized color: '%s'\n", name);
	}

	memcpy (palette, tmp_palette, sizeof (tmp_palette));
	return TRUE;
}

static void
set_colors (NmcColorOption color_option,
            bool *out_use_colors,
            char **out_palette_buffer,
            const char **palette /* _NM_META_COLOR_NUM elements */)
{
	gs_free char *palette_str = NULL;
	gboolean use_colors;

	use_colors = check_colors (color_option, &palette_str);

	*out_use_colors = use_colors;
	if (use_colors && palette_str) {
		GError *error = NULL;

		if (!parse_color_scheme (palette_str, palette, &error)) {
			g_debug ("Error parsing color scheme: %s", error->message);
			g_error_free (error);
		} else
			*out_palette_buffer = g_steal_pointer (&palette_str);
	}
}

/*************************************************************************************/

static gboolean
process_command_line (NmCli *nmc, int argc, char **argv)
{
	NmcColorOption colors = NMC_USE_COLOR_AUTO;
	char *base;

	base = strrchr (argv[0], '/');
	if (base == NULL)
		base = argv[0];
	else
		base++;
	if (argc > 1 && nm_streq (argv[1], "--complete-args")) {
		nmc->complete = TRUE;
		argv[1] = argv[0];
		next_arg (nmc, &argc, &argv, NULL);
	}
	next_arg (nmc, &argc, &argv, NULL);

	/* parse options */
	while (argc) {
		char *value;

		if (argv[0][0] != '-')
			break;

		if (argc == 1 && nmc->complete) {
			nmc_complete_strings (argv[0], "--terse", "--pretty", "--mode", "--overview",
			                               "--colors", "--escape",
			                               "--fields", "--nocheck", "--get-values",
			                               "--wait", "--version", "--help");
		}

		if (argv[0][1] == '-' && argv[0][2] == '\0') {
			/* '--' ends options */
			next_arg (nmc, &argc, &argv, NULL);
			break;
		}

		if (matches_arg (nmc, &argc, &argv, "-overview", NULL)) {
			nmc->nmc_config_mutable.overview = TRUE;
		} else if (matches_arg (nmc, &argc, &argv, "-terse", NULL)) {
			if (nmc->nmc_config.print_output == NMC_PRINT_TERSE) {
				g_string_printf (nmc->return_text, _("Error: Option '--terse' is specified the second time."));
				nmc->return_value = NMC_RESULT_ERROR_USER_INPUT;
				return FALSE;
			}
			else if (nmc->nmc_config.print_output == NMC_PRINT_PRETTY) {
				g_string_printf (nmc->return_text, _("Error: Option '--terse' is mutually exclusive with '--pretty'."));
				nmc->return_value = NMC_RESULT_ERROR_USER_INPUT;
				return FALSE;
			}
			else
				nmc->nmc_config_mutable.print_output = NMC_PRINT_TERSE;
		} else if (matches_arg (nmc, &argc, &argv, "-pretty", NULL)) {
			if (nmc->nmc_config.print_output == NMC_PRINT_PRETTY) {
				g_string_printf (nmc->return_text, _("Error: Option '--pretty' is specified the second time."));
				nmc->return_value = NMC_RESULT_ERROR_USER_INPUT;
				return FALSE;
			}
			else if (nmc->nmc_config.print_output == NMC_PRINT_TERSE) {
				g_string_printf (nmc->return_text, _("Error: Option '--pretty' is mutually exclusive with '--terse'."));
				nmc->return_value = NMC_RESULT_ERROR_USER_INPUT;
				return FALSE;
			}
			else
				nmc->nmc_config_mutable.print_output = NMC_PRINT_PRETTY;
		} else if (matches_arg (nmc, &argc, &argv, "-mode", &value)) {
			nmc->mode_specified = TRUE;
			if (argc == 1 && nmc->complete)
				complete_option_with_value (argv[0], value, "tabular", "multiline", NULL);
			if (matches (value, "tabular"))
				nmc->nmc_config_mutable.multiline_output = FALSE;
			else if (matches (value, "multiline"))
				nmc->nmc_config_mutable.multiline_output = TRUE;
			else {
				g_string_printf (nmc->return_text, _("Error: '%s' is not a valid argument for '%s' option."), value, argv[0]);
				nmc->return_value = NMC_RESULT_ERROR_USER_INPUT;
				return FALSE;
			}
		} else if (matches_arg (nmc, &argc, &argv, "-colors", &value)) {
			if (argc == 1 && nmc->complete)
				complete_option_with_value (argv[0], value, "yes", "no", "auto", NULL);
			if (matches (value, "auto"))
				colors = NMC_USE_COLOR_AUTO;
			else if (matches (value, "yes"))
				colors = NMC_USE_COLOR_YES;
			else if (matches (value, "no"))
				colors = NMC_USE_COLOR_NO;
			else {
				g_string_printf (nmc->return_text, _("Error: '%s' is not valid argument for '%s' option."), value, argv[0]);
				nmc->return_value = NMC_RESULT_ERROR_USER_INPUT;
				return FALSE;
			}
		} else if (matches_arg (nmc, &argc, &argv, "-escape", &value)) {
			if (argc == 1 && nmc->complete)
				complete_option_with_value (argv[0], value, "yes", "no", NULL);
			if (matches (value, "yes"))
				nmc->nmc_config_mutable.escape_values = TRUE;
			else if (matches (value, "no"))
				nmc->nmc_config_mutable.escape_values = FALSE;
			else {
				g_string_printf (nmc->return_text, _("Error: '%s' is not valid argument for '%s' option."), value, argv[0]);
				nmc->return_value = NMC_RESULT_ERROR_USER_INPUT;
				return FALSE;
			}
		} else if (matches_arg (nmc, &argc, &argv, "-fields", &value)) {
			if (argc == 1 && nmc->complete)
				complete_fields (argv[0], value);
			nmc->required_fields = g_strdup (value);
		} else if (matches_arg (nmc, &argc, &argv, "-get-values", &value)) {
			if (argc == 1 && nmc->complete)
				complete_fields (argv[0], value);
			nmc->required_fields = g_strdup (value);
			nmc->nmc_config_mutable.print_output = NMC_PRINT_TERSE;
			/* We want fixed tabular mode here, but just set the mode specified and rely on defaults:
			 * in this way we allow use of "-m multiline" to swap the output mode also if placed
			 * before the "-g <field>" option (-g may be still more practical and easy to remember than -t -f).
			*/
			nmc->mode_specified = TRUE;
		} else if (matches_arg (nmc, &argc, &argv, "-nocheck", NULL)) {
			/* ignore for backward compatibility */
		} else if (matches_arg (nmc, &argc, &argv, "-wait", &value)) {
			unsigned long timeout;

			if (!nmc_string_to_uint (value, TRUE, 0, G_MAXINT, &timeout)) {
				g_string_printf (nmc->return_text, _("Error: '%s' is not a valid timeout."), value);
				nmc->return_value = NMC_RESULT_ERROR_USER_INPUT;
				return FALSE;
			}
			nmc->timeout = (int) timeout;
		} else if (matches_arg (nmc, &argc, &argv, "-version", NULL)) {
			if (!nmc->complete)
				g_print (_("nmcli tool, version %s\n"), NMCLI_VERSION);
			return NMC_RESULT_SUCCESS;
		} else if (matches_arg (nmc, &argc, &argv, "-help", NULL)) {
			if (!nmc->complete)
				usage ();
			return NMC_RESULT_SUCCESS;
		} else {
			if (nmc->return_value == NMC_RESULT_SUCCESS) {
				g_string_printf (nmc->return_text, _("Error: Option '%s' is unknown, try 'nmcli -help'."), argv[0]);
				nmc->return_value = NMC_RESULT_ERROR_USER_INPUT;
			}
			return FALSE;
		}

		next_arg (nmc, &argc, &argv, NULL);
	}

	/* Ignore --overview when fields are set explicitly */
	if (nmc->required_fields)
		nmc->nmc_config_mutable.overview = FALSE;

	set_colors (colors,
	            &nmc->nmc_config_mutable.use_colors,
	            &nmc->palette_buffer,
	            nmc->nmc_config_mutable.palette);

	/* Now run the requested command */
	nmc_do_cmd (nmc, nmcli_cmds, *argv, argc, argv);

	return TRUE;
}

static gboolean nmcli_sigint = FALSE;

gboolean
nmc_seen_sigint (void)
{
	return nmcli_sigint;
}

void
nmc_clear_sigint (void)
{
	nmcli_sigint = FALSE;
}

void nmc_exit (void)
{
	tcsetattr (STDIN_FILENO, TCSADRAIN, &termios_orig);
	nmc_cleanup_readline ();
	exit (1);
}

static gboolean
signal_handler (gpointer user_data)
{
	int signo = GPOINTER_TO_INT (user_data);

	switch (signo) {
	case SIGINT:
		if (nmc_get_in_readline ()) {
			nmcli_sigint = TRUE;
		} else {
			nm_cli.return_value = 0x80 + signo;
			g_string_printf (nm_cli.return_text, _("Error: nmcli terminated by signal %s (%d)"),
			                 strsignal (signo), signo);
			g_main_loop_quit (loop);
		}
		break;
	case SIGTERM:
		nm_cli.return_value = 0x80 + signo;
		g_string_printf (nm_cli.return_text, _("Error: nmcli terminated by signal %s (%d)"),
		                 strsignal (signo), signo);
		nmc_exit ();
		break;
	}

	return G_SOURCE_CONTINUE;
}

void
nm_cli_spawn_pager (NmCli *nmc)
{
	if (nmc->pager_pid > 0)
		return;
	nmc->pager_pid = nmc_terminal_spawn_pager (&nmc->nmc_config);
}

static void
nmc_cleanup (NmCli *nmc)
{
	pid_t ret;

	g_clear_object (&nmc->client);

	if (nmc->return_text)
		g_string_free (g_steal_pointer (&nmc->return_text), TRUE);

	if (nmc->secret_agent) {
		nm_secret_agent_old_unregister (NM_SECRET_AGENT_OLD (nmc->secret_agent), NULL, NULL);
		g_clear_object (&nmc->secret_agent);
	}

	nm_clear_pointer (&nmc->pwds_hash, g_hash_table_destroy);

	nm_clear_g_free (&nmc->required_fields);

	if (nmc->pager_pid > 0) {
		fclose (stdout);
		fclose (stderr);
		do {
			ret = waitpid (nmc->pager_pid, NULL, 0);
		} while (ret == -1 && errno == EINTR);
		nmc->pager_pid = 0;
	}

	nm_clear_g_free (&nmc->palette_buffer);

	nmc_polkit_agent_fini (nmc);
}

int
main (int argc, char *argv[])
{
	/* Set locale to use environment variables */
	setlocale (LC_ALL, "");

#ifdef GETTEXT_PACKAGE
	/* Set i18n stuff */
	bindtextdomain (GETTEXT_PACKAGE, NMLOCALEDIR);
	bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
	textdomain (GETTEXT_PACKAGE);
#endif

	/* Save terminal settings */
	tcgetattr (STDIN_FILENO, &termios_orig);

	nm_cli.return_text = g_string_new (_("Success"));
	loop = g_main_loop_new (NULL, FALSE);

	g_unix_signal_add (SIGTERM, signal_handler, GINT_TO_POINTER (SIGTERM));
	g_unix_signal_add (SIGINT, signal_handler, GINT_TO_POINTER (SIGINT));

	if (process_command_line (&nm_cli, argc, argv))
		g_main_loop_run (loop);

	if (nm_cli.complete) {
		/* Remove error statuses from command completion runs. */
		if (nm_cli.return_value < NMC_RESULT_COMPLETE_FILE)
			nm_cli.return_value = NMC_RESULT_SUCCESS;
	} else if (nm_cli.return_value != NMC_RESULT_SUCCESS) {
		/* Print result descripting text */
		g_printerr ("%s\n", nm_cli.return_text->str);
	}

	g_main_loop_unref (loop);
	nmc_cleanup (&nm_cli);

	return nm_cli.return_value;
}