aboutsummaryrefslogtreecommitdiff
path: root/sdn.cpp
blob: 937fb36f3bec2c12a18f93a4424bfd78332650de (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
//
// sdn: simple directory navigator
//
// Copyright (c) 2017, Přemysl Janouch <p.janouch@gmail.com>
//
// Permission to use, copy, modify, and/or distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
// SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
// OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
// CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
//

#include <string>
#include <vector>
#include <locale>
#include <iostream>
#include <algorithm>
#include <cwchar>
#include <climits>
#include <cstdlib>
#include <fstream>

#include <ncurses.h>
#include <unistd.h>
#include <dirent.h>
#include <sys/stat.h>
#include <sys/inotify.h>
#include <fcntl.h>
#include <pwd.h>
#include <grp.h>

// Unicode is complex enough already and we might make assumptions
#ifndef __STDC_ISO_10646__
#error Unicode required for wchar_t
#endif

// Trailing return types make C++ syntax suck considerably less
#define fun static auto

#ifndef A_ITALIC
#define A_ITALIC 0
#endif

using namespace std;

// For some reason handling of encoding in C and C++ is extremely annoying
// and C++17 ironically obsoletes C++11 additions that made it less painful
fun to_wide (const string &multi) -> wstring {
	wstring wide; wchar_t w; mbstate_t mb {};
	size_t n = 0, len = multi.length () + 1;
	while (auto res = mbrtowc (&w, multi.c_str () + n, len - n, &mb)) {
		if (res == size_t (-1) || res == size_t (-2))
			return L"/invalid encoding/";

		n += res;
		wide += w;
	}
	return wide;
}

fun to_mb (const wstring &wide) -> string {
	string mb; char buf[MB_LEN_MAX + 1]; mbstate_t mbs {};
	for (size_t n = 0; n <= wide.length (); n++) {
		auto res = wcrtomb (buf, wide.c_str ()[n], &mbs);
		if (res == size_t (-1))
			throw invalid_argument ("invalid encoding");
		mb.append (buf, res);
	}
	// There's one extra NUL character added by wcrtomb()
	mb.erase (mb.length () - 1);
	return mb;
}

fun prefix_length (const wstring &in, const wstring &of) -> int {
	int score = 0;
	for (size_t i = 0; i < of.size () && in.size () >= i && in[i] == of[i]; i++)
		score++;
	return score;
}

fun split (const string &s, const string &sep, vector<string> &out) {
	size_t mark = 0, p = s.find (sep);
	for (; p != string::npos; p = s.find (sep, (mark = p + sep.length ())))
		if (mark < p)
			out.push_back (s.substr (mark, p - mark));
	if (mark < s.length ())
		out.push_back (s.substr (mark));
}

fun split (const string &s, const string &sep) -> vector<string> {
	vector<string> result; split (s, sep, result); return result;
}

fun shell_escape (const string &v) -> string {
	string result;
	for (auto c : v)
		if (c == '\'')
			result += "'\\''";
		else
			result += c;
	return "'" + result + "'";
}

fun decode_type (mode_t m) -> wchar_t {
	if (S_ISDIR  (m)) return L'd'; if (S_ISBLK  (m)) return L'b';
	if (S_ISCHR  (m)) return L'c'; if (S_ISLNK  (m)) return L'l';
	if (S_ISFIFO (m)) return L'p'; if (S_ISSOCK (m)) return L's';
	return L'-';
}

/// Return the modes of a file in the usual stat/ls format
fun decode_mode (mode_t m) -> wstring {
	return { decode_type (m),
		L"r-"[!(m & S_IRUSR)],
		L"w-"[!(m & S_IWUSR)],
		((m & S_ISUID) ? L"sS" : L"x-")[!(m & S_IXUSR)],
		L"r-"[!(m & S_IRGRP)],
		L"w-"[!(m & S_IWGRP)],
		((m & S_ISGID) ? L"sS" : L"x-")[!(m & S_IXGRP)],
		L"r-"[!(m & S_IROTH)],
		L"w-"[!(m & S_IWOTH)],
		((m & S_ISVTX) ? L"tT" : L"x-")[!(m & S_IXOTH)],
	};
}

template<class T> fun shift (vector<T> &v) -> T {
	auto front = v.front (); v.erase (begin (v)); return front;
}

// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

fun xdg_config_home () -> string {
	const char *user_dir = getenv ("XDG_CONFIG_HOME");
	if (user_dir && user_dir[0] == '/')
		return user_dir;

	const char *home_dir = getenv ("HOME");
	return string (home_dir ? home_dir : "") + "/.config";
}

// In C++17 we will get <optional> but until then there's unique_ptr
fun xdg_config_find (const string &suffix) -> unique_ptr<ifstream> {
	vector<string> dirs {xdg_config_home ()};
	const char *system_dirs = getenv ("XDG_CONFIG_DIRS");
	split (system_dirs ? system_dirs : "/etc/xdg", ":", dirs);
	for (const auto &dir : dirs) {
		if (dir[0] != '/')
			continue;
		if (ifstream ifs {dir + suffix})
			return make_unique<ifstream> (move (ifs));
	}
	return nullptr;
}

// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

using ncstring = basic_string<cchar_t>;

fun cchar (chtype attrs, wchar_t c) -> cchar_t {
	cchar_t ch {};
	setcchar (&ch, &c, attrs, 0, nullptr);
	return ch;
}

fun apply_attrs (const wstring &w, attr_t attrs) -> ncstring {
	ncstring res;
	for (auto c : w)
		res += cchar (attrs, c);
	return res;
}

fun sanitize_char (chtype attrs, wchar_t c) -> ncstring {
	if (c < 32)
		return {cchar (attrs | A_REVERSE, L'^'),
				cchar (attrs | A_REVERSE, c + 64)};
	if (!iswprint (c))
		return {cchar (attrs | A_REVERSE, L'?')};
	return {cchar (attrs, c)};
}

fun sanitize (const ncstring &nc) -> ncstring {
	ncstring out;
	for (cchar_t c : nc)
		for (size_t i = 0; i < CCHARW_MAX && c.chars[i]; i++)
			out += sanitize_char (c.attr, c.chars[i]);
	return out;
}

fun print (const ncstring &nc, int limit) -> int {
	int total_width = 0;
	for (cchar_t c : sanitize (nc)) {
		int width = wcwidth (c.chars[0]);
		if (total_width + width > limit)
			break;

		add_wch (&c);
		total_width += width;
	}
	return total_width;
}

fun compute_width (const ncstring &nc) -> int {
	int total = 0;
	for (const auto &c : nc)
		total += wcwidth (c.chars[0]);
	return total;
}

// TODO: maybe we need formatting for the padding passed in?
fun align (const ncstring &nc, int target) -> ncstring {
	auto current = compute_width (nc);
	auto missing = abs (target) - current;
	if (missing <= 0)
		return nc;
	return target < 0
		? nc + apply_attrs (wstring (missing, L' '), 0)
		: apply_attrs (wstring (missing, L' '), 0) + nc;
}

fun allocate_pair (short fg, short bg) -> short {
	static short counter = 1; init_pair (counter, fg, bg); return counter++;
}

fun decode_attrs (const vector<string> &attrs) -> chtype {
	chtype result = 0; int fg = -1, bg = -1, colors = 0;
	for (const auto &s : attrs) {
		char *end; auto color = strtol (s.c_str (), &end, 10);
		if (!*end && color >= -1 && color < COLORS) {
			if    (++colors == 1) fg = color;
			else if (colors == 2) bg = color;
		}
		else if (s == "bold")    result |= A_BOLD;
		else if (s == "dim")     result |= A_DIM;
		else if (s == "ul")      result |= A_UNDERLINE;
		else if (s == "blink")   result |= A_BLINK;
		else if (s == "reverse") result |= A_REVERSE;
		else if (s == "italic")  result |= A_ITALIC;
	}
	if (fg != -1 || bg != -1)
		result |= COLOR_PAIR (allocate_pair (fg, bg));
	return result;
}

// --- Application -------------------------------------------------------------

#define CTRL 31 &

struct row {
	enum { MODES, USER, GROUP, SIZE, MTIME, FILENAME, COLUMNS };
	ncstring cols[COLUMNS];
};

struct entry {
	string filename; struct stat info; row row;
	auto operator< (const entry &other) -> bool {
		auto a = S_ISDIR (info.st_mode);
		auto b = S_ISDIR (other.info.st_mode);
		return (a && !b) || (a == b && filename < other.filename);
	}
};

static struct {
	string cwd;                         // Current working directory
	vector<entry> entries;              // Current directory entries
	int offset, cursor;                 // Scroll offset and cursor position
	bool full_view;                     // Whether to show extended information
	int max_widths[row::COLUMNS];       // Column widths

	string chosen;                      // Chosen item for the command line
	bool chosen_full;                   // Use the full path

	int inotify_fd, inotify_wd = -1;    // File watch
	bool out_of_date;                   // Entries may be out of date

	wchar_t editor;                     // Prompt character for editing
	wstring editor_line;                // Current user input

	enum { AT_CURSOR, AT_BAR, AT_CWD, AT_INPUT, AT_COUNT };
	chtype attrs[AT_COUNT] = {A_REVERSE, 0, A_BOLD, 0};
	const char *attr_names[AT_COUNT] = {"cursor", "bar", "cwd", "input"};
} g;

fun make_row (const string &filename, const struct stat &info) -> row {
	row r;
	r.cols[row::MODES] = apply_attrs (decode_mode (info.st_mode), 0);

	auto user = to_wstring (info.st_uid);
	if (auto u = getpwuid (info.st_uid))
		user = to_wide (u->pw_name);
	r.cols[row::USER] = apply_attrs (user, 0);

	auto group = to_wstring (info.st_gid);
	if (auto g = getgrgid (info.st_gid))
		group = to_wide (g->gr_name);
	r.cols[row::GROUP] = apply_attrs (group, 0);

	auto size = to_wstring (info.st_size);
	if      (info.st_size >> 40) size = to_wstring (info.st_size >> 40) + L"T";
	else if (info.st_size >> 30) size = to_wstring (info.st_size >> 30) + L"G";
	else if (info.st_size >> 20) size = to_wstring (info.st_size >> 20) + L"M";
	else if (info.st_size >> 10) size = to_wstring (info.st_size >> 10) + L"K";
	r.cols[row::SIZE] = apply_attrs (size, 0);

	auto now = time (NULL);
	auto now_year = localtime (&now)->tm_year;

	char buf[32] = "";
	auto tm = localtime (&info.st_mtime);
	strftime (buf, sizeof buf,
		(tm->tm_year == now_year) ? "%b %e %H:%M" : "%b %e  %Y", tm);
	r.cols[row::MTIME] = apply_attrs (to_wide (buf), 0);

	// TODO: symlink target and whatever formatting
	r.cols[row::FILENAME] = apply_attrs (to_wide (filename), 0);
	return r;
}

fun inline visible_lines () -> int { return max (0, LINES - 2); }

fun update () {
	int start_column = g.full_view ? 0 : row::FILENAME;
	static int alignment[row::COLUMNS] = { -1, -1, -1, 1, -1, -1 };
	erase ();

	int available = visible_lines ();
	int used = min (available, int (g.entries.size ()) - g.offset);
	for (int i = 0; i < used; i++) {
		auto index = g.offset + i;
		attrset (index == g.cursor ? g.attrs[g.AT_CURSOR] : 0);
		move (available - used + i, 0);

		auto used = 0;
		for (int col = start_column; col < row::COLUMNS; col++) {
			const auto &field = g.entries[index].row.cols[col];
			auto aligned = align (field, alignment[col] * g.max_widths[col]);
			used += print (aligned + apply_attrs (L" ", 0), COLS - used);
		}
		hline (' ', COLS - used);
	}

	auto bar = apply_attrs (to_wide (g.cwd), g.attrs[g.AT_CWD]);
	if (g.out_of_date)
		bar += apply_attrs (L" [+]", 0);

	move (LINES - 2, 0);
	attrset (g.attrs[g.AT_BAR]);
	hline (' ', COLS - print (bar, COLS));

	attrset (g.attrs[g.AT_INPUT]);
	if (g.editor) {
		move (LINES - 1, 0);
		auto p = apply_attrs ({g.editor, L' ', L'\0'}, 0);
		move (LINES - 1, print (p + apply_attrs (g.editor_line, 0), COLS - 1));
		curs_set (1);
	} else
		curs_set (0);

	refresh ();
}

fun reload () {
	char buf[4096]; g.cwd = getcwd (buf, sizeof buf);

	auto dir = opendir (".");
	g.entries.clear ();
	while (auto f = readdir (dir)) {
		// Two dots are for navigation but this ain't as useful
		if (f->d_name == string ("."))
			continue;

		struct stat sb = {};
		lstat (f->d_name, &sb);
		g.entries.push_back ({ f->d_name, sb, make_row (f->d_name, sb) });
	}
	closedir (dir);
	sort (begin (g.entries), end (g.entries));
	g.out_of_date = false;

	for (int col = 0; col < row::COLUMNS; col++) {
		auto &longest = g.max_widths[col] = 0;
		for (const auto &entry : g.entries)
			longest = max (longest, compute_width (entry.row.cols[col]));
	}

	g.cursor = min (g.cursor, int (g.entries.size ()) - 1);
	g.offset = min (g.offset, int (g.entries.size ()) - 1);
	update ();

	if (g.inotify_wd != -1)
		inotify_rm_watch (g.inotify_fd, g.inotify_wd);

	g.inotify_wd = inotify_add_watch (g.inotify_fd, buf,
		IN_ALL_EVENTS | IN_ONLYDIR);
}

fun search (const wstring &needle) {
	int best = g.cursor, best_n = 0;
	for (int i = 0; i < int (g.entries.size ()); i++) {
		auto o = (i + g.cursor) % g.entries.size ();
		int n = prefix_length (to_wide (g.entries[o].filename), needle);
		if (n > best_n) {
			best = o;
			best_n = n;
		}
	}
	g.cursor = best;
}

fun handle_editor (wint_t c, bool is_char) {
	if (c == 27 || c == (CTRL L'g')) {
		g.editor_line.clear ();
		g.editor = 0;
	} else if (c == L'\r' || (!is_char && c == KEY_ENTER)) {
		if (g.editor == L'e') {
			auto mb = to_mb (g.editor_line);
			rename (g.entries[g.cursor].filename.c_str (), mb.c_str ());
			reload ();
		}
		g.editor_line.clear ();
		g.editor = 0;
	} else if (is_char) {
		g.editor_line += c;
		if (g.editor == L'/'
		 || g.editor == L's')
			search (g.editor_line);
	} else if (c == KEY_BACKSPACE) {
		if (!g.editor_line.empty ())
			g.editor_line.erase (g.editor_line.length () - 1);
	} else
		beep ();
}

fun handle (wint_t c, bool is_char) -> bool {
	// If an editor is active, let it handle the key instead and eat it
	if (g.editor) {
		handle_editor (c, is_char);
		c = WEOF;
	}

	// Translate the Alt key into a bit outside the range of Unicode
	enum { ALT = 1 << 24 };
	if (c == 27) {
		if (get_wch (&c) == ERR) {
			beep ();
			return true;
		}
		c |= ALT;
	}

	const auto &current = g.entries[g.cursor];
	switch (c) {
	case ALT | L'\r':
	case ALT | KEY_ENTER:
		g.chosen_full = true;
		g.chosen = current.filename;
		return false;
	case L'\r':
	case KEY_ENTER:
	{
		bool is_dir = S_ISDIR (current.info.st_mode) != 0;
		// Dive into directories and accessible symlinks to them
		if (S_ISLNK (current.info.st_mode)) {
			char buf[PATH_MAX];
			struct stat sb = {};
			auto len = readlink (current.filename.c_str (), buf, sizeof buf);
			is_dir = len > 0 && size_t (len) < sizeof buf
				&& !stat (current.filename.c_str (), &sb)
				&& S_ISDIR (sb.st_mode) != 0;
		}
		if (!is_dir) {
			g.chosen = current.filename;
			return false;
		}
		if (!chdir (current.filename.c_str ())) {
			g.cursor = 0;
			reload ();
		}
		break;
	}

	// M-o ought to be the same shortcut the navigator is launched with
	case ALT | L'o':
	case L'q':
		return false;

	case L'k': case CTRL L'p': case KEY_UP:
		g.cursor--;
		break;
	case L'j': case CTRL L'n': case KEY_DOWN:
		g.cursor++;
		break;
	case L'g': case ALT | L'<': case KEY_HOME:
		g.cursor = 0;
		break;
	case L'G': case ALT | L'>': case KEY_END:
		g.cursor = int (g.entries.size ()) - 1;
		break;

	case KEY_PPAGE: g.cursor -= LINES; break;
	case KEY_NPAGE: g.cursor += LINES; break;

	case CTRL L'e': g.offset++; break;
	case CTRL L'y': g.offset--; break;

	case L't':
	case ALT | L't':
		g.full_view = !g.full_view;
		break;

	case ALT | L'e':
		g.editor_line = to_wide (current.filename);
		// Fall-through
	case L'e':
		g.editor = c & ~ALT;
		break;
	case L'/':
	case L's':
		g.editor = c;
		break;

	case CTRL L'L':
		clear ();
		break;
	case L'r':
		reload ();
		break;
	case KEY_RESIZE:
	case WEOF:
		break;
	default:
		beep ();
	}
	g.cursor = max (g.cursor, 0);
	g.cursor = min (g.cursor, int (g.entries.size ()) - 1);

	// Make sure cursor is visible
	g.offset = max (g.offset, 0);
	g.offset = min (g.offset, int (g.entries.size ()) - 1);

	if (g.offset > g.cursor)
		g.offset = g.cursor;
	if (g.cursor - g.offset >= visible_lines ())
		g.offset = g.cursor - visible_lines () + 1;

	update ();
	return true;
}

fun inotify_check () {
	// Only provide simple indication that contents might have changed
	char buf[4096]; ssize_t len;
	bool changed = false;
	while ((len = read (g.inotify_fd, buf, sizeof buf)) > 0) {
		const inotify_event *e;
		for (char *ptr = buf; ptr < buf + len; ptr += sizeof *e + e->len) {
			e = (const inotify_event *) buf;
			if (e->wd == g.inotify_wd)
				changed = g.out_of_date = true;
		}
	}
	if (changed)
		update ();
}

fun load_configuration () {
	auto config = xdg_config_find ("/" PROJECT_NAME "/look");
	if (!config)
		return;

	// Bail out on dumb terminals, there's not much one can do about them
	if (!has_colors () || start_color () == ERR || use_default_colors () == ERR)
		return;

	string line;
	while (getline (*config, line)) {
		vector<string> tokens = split (line, " ");
		if (tokens.empty () || line.front () == '#')
			continue;
		auto name = shift (tokens);
		for (int i = 0; i < g.AT_COUNT; i++)
			if (name == g.attr_names[i])
				g.attrs[i] = decode_attrs (tokens);
	}

	// TODO: load and use LS_COLORS
}

int main (int argc, char *argv[]) {
	(void) argc;
	(void) argv;

	// That bitch zle closes stdin before exec without redirection
	(void) close (STDIN_FILENO);
	if (open ("/dev/tty", O_RDWR)) {
		cerr << "cannot open tty" << endl;
		return 1;
	}

	// Save the original stdout and force ncurses to use the terminal directly
	auto output_fd = dup (STDOUT_FILENO);
	dup2 (STDIN_FILENO, STDOUT_FILENO);

	if ((g.inotify_fd = inotify_init1 (IN_NONBLOCK)) < 0) {
		cerr << "cannot initialize inotify" << endl;
		return 1;
	}

	locale::global (locale (""));
	if (!initscr () || cbreak () == ERR || noecho () == ERR || nonl () == ERR
	 || halfdelay (1) == ERR || keypad (stdscr, TRUE) == ERR) {
		cerr << "cannot initialize screen" << endl;
		return 1;
	}

	load_configuration ();
	reload ();
	auto start_dir = g.cwd;

	wint_t c;
	while (1) {
		inotify_check ();
		int res = get_wch (&c);
		if (res != ERR && !handle (c, res == OK))
			break;
	}
	endwin ();

	// Presumably it is going to end up as an argument, so quote it
	if (!g.chosen.empty ())
		g.chosen = shell_escape (g.chosen);

	// We can't portably create a standard stream from an FD, so modify the FD
	dup2 (output_fd, STDOUT_FILENO);

	if (g.chosen_full) {
		auto full_path = g.cwd + "/" + g.chosen;
		cout << "local insert=" << shell_escape (full_path) << endl;
		return 0;
	}
	if (g.cwd != start_dir)
		cout << "local cd=" << shell_escape (g.cwd) << endl;
	if (!g.chosen.empty ())
		cout << "local insert=" << shell_escape (g.chosen) << endl;
	return 0;
}