git@vger.kernel.org list mirror (unofficial, one of many)
 help / color / mirror / code / Atom feed
35bca03d1470601568d17ed3cf71c5c622d43d87 blob 8416 bytes (raw)

  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
 
#include "git-compat-util.h"
#include "compat/terminal.h"
#include "sigchain.h"
#include "strbuf.h"
#include "run-command.h"
#include "string-list.h"
#include "hashmap.h"

#if defined(HAVE_DEV_TTY) || defined(GIT_WINDOWS_NATIVE)

static void restore_term(void);

static void restore_term_on_signal(int sig)
{
	restore_term();
	sigchain_pop(sig);
	raise(sig);
}

#ifdef HAVE_DEV_TTY

#define INPUT_PATH "/dev/tty"
#define OUTPUT_PATH "/dev/tty"

static int term_fd = -1;
static struct termios old_term;

static void restore_term(void)
{
	if (term_fd < 0)
		return;

	tcsetattr(term_fd, TCSAFLUSH, &old_term);
	close(term_fd);
	term_fd = -1;
}

static int disable_bits(tcflag_t bits)
{
	struct termios t;

	term_fd = open("/dev/tty", O_RDWR);
	if (tcgetattr(term_fd, &t) < 0)
		goto error;

	old_term = t;
	sigchain_push_common(restore_term_on_signal);

	t.c_lflag &= ~bits;
	if (!tcsetattr(term_fd, TCSAFLUSH, &t))
		return 0;

error:
	close(term_fd);
	term_fd = -1;
	return -1;
}

static int disable_echo(void)
{
	return disable_bits(ECHO);
}

static int enable_non_canonical(void)
{
	return disable_bits(ICANON | ECHO);
}

#elif defined(GIT_WINDOWS_NATIVE)

#define INPUT_PATH "CONIN$"
#define OUTPUT_PATH "CONOUT$"
#define FORCE_TEXT "t"

static int use_stty = 1;
static struct string_list stty_restore = STRING_LIST_INIT_DUP;
static HANDLE hconin = INVALID_HANDLE_VALUE;
static DWORD cmode;

static void restore_term(void)
{
	if (use_stty) {
		int i;
		struct child_process cp = CHILD_PROCESS_INIT;

		if (stty_restore.nr == 0)
			return;

		argv_array_push(&cp.args, "stty");
		for (i = 0; i < stty_restore.nr; i++)
			argv_array_push(&cp.args, stty_restore.items[i].string);
		run_command(&cp);
		string_list_clear(&stty_restore, 0);
		return;
	}

	if (hconin == INVALID_HANDLE_VALUE)
		return;

	SetConsoleMode(hconin, cmode);
	CloseHandle(hconin);
	hconin = INVALID_HANDLE_VALUE;
}

static int disable_bits(DWORD bits)
{
	if (use_stty) {
		struct child_process cp = CHILD_PROCESS_INIT;

		argv_array_push(&cp.args, "stty");

		if (bits & ENABLE_LINE_INPUT) {
			string_list_append(&stty_restore, "icanon");
			argv_array_push(&cp.args, "-icanon");
		}

		if (bits & ENABLE_ECHO_INPUT) {
			string_list_append(&stty_restore, "echo");
			argv_array_push(&cp.args, "-echo");
		}

		if (bits & ENABLE_PROCESSED_INPUT) {
			string_list_append(&stty_restore, "-ignbrk");
			string_list_append(&stty_restore, "intr");
			string_list_append(&stty_restore, "^c");
			argv_array_push(&cp.args, "ignbrk");
			argv_array_push(&cp.args, "intr");
			argv_array_push(&cp.args, "");
		}

		if (run_command(&cp) == 0)
			return 0;

		/* `stty` could not be executed; access the Console directly */
		use_stty = 0;
	}

	hconin = CreateFile("CONIN$", GENERIC_READ | GENERIC_WRITE,
	    FILE_SHARE_READ, NULL, OPEN_EXISTING,
	    FILE_ATTRIBUTE_NORMAL, NULL);
	if (hconin == INVALID_HANDLE_VALUE)
		return -1;

	GetConsoleMode(hconin, &cmode);
	sigchain_push_common(restore_term_on_signal);
	if (!SetConsoleMode(hconin, cmode & ~bits)) {
		CloseHandle(hconin);
		hconin = INVALID_HANDLE_VALUE;
		return -1;
	}

	return 0;
}

static int disable_echo(void)
{
	return disable_bits(ENABLE_ECHO_INPUT);
}

static int enable_non_canonical(void)
{
	return disable_bits(ENABLE_ECHO_INPUT | ENABLE_LINE_INPUT | ENABLE_PROCESSED_INPUT);
}

/*
 * Override `getchar()`, as the default implementation does not use
 * `ReadFile()`.
 *
 * This poses a problem when we want to see whether the standard
 * input has more characters, as the default of Git for Windows is to start the
 * Bash in a MinTTY, which uses a named pipe to emulate a pty, in which case
 * our `poll()` emulation calls `PeekNamedPipe()`, which seems to require
 * `ReadFile()` to be called first to work properly (it only reports 0
 * available bytes, otherwise).
 *
 * So let's just override `getchar()` with a version backed by `ReadFile()` and
 * go our merry ways from here.
 */
static int mingw_getchar(void)
{
	DWORD read = 0;
	unsigned char ch;

	if (!ReadFile(GetStdHandle(STD_INPUT_HANDLE), &ch, 1, &read, NULL))
		return EOF;

	if (!read) {
		error("Unexpected 0 read");
		return EOF;
	}

	return ch;
}
#define getchar mingw_getchar

#endif

#ifndef FORCE_TEXT
#define FORCE_TEXT
#endif

char *git_terminal_prompt(const char *prompt, int echo)
{
	static struct strbuf buf = STRBUF_INIT;
	int r;
	FILE *input_fh, *output_fh;

	input_fh = fopen(INPUT_PATH, "r" FORCE_TEXT);
	if (!input_fh)
		return NULL;

	output_fh = fopen(OUTPUT_PATH, "w" FORCE_TEXT);
	if (!output_fh) {
		fclose(input_fh);
		return NULL;
	}

	if (!echo && disable_echo()) {
		fclose(input_fh);
		fclose(output_fh);
		return NULL;
	}

	fputs(prompt, output_fh);
	fflush(output_fh);

	r = strbuf_getline_lf(&buf, input_fh);
	if (!echo) {
		putc('\n', output_fh);
		fflush(output_fh);
	}

	restore_term();
	fclose(input_fh);
	fclose(output_fh);

	if (r == EOF)
		return NULL;
	return buf.buf;
}

/*
 * The `is_known_escape_sequence()` function returns 1 if the passed string
 * corresponds to an Escape sequence that the terminal capabilities contains.
 *
 * To avoid depending on ncurses or other platform-specific libraries, we rely
 * on the presence of the `infocmp` executable to do the job for us (failing
 * silently if the program is not available or refused to run).
 */
struct escape_sequence_entry {
	struct hashmap_entry entry;
	char sequence[FLEX_ARRAY];
};

static int sequence_entry_cmp(const void *hashmap_cmp_fn_data,
			      const struct escape_sequence_entry *e1,
			      const struct escape_sequence_entry *e2,
			      const void *keydata)
{
	return strcmp(e1->sequence, keydata ? keydata : e2->sequence);
}

static int is_known_escape_sequence(const char *sequence)
{
	static struct hashmap sequences;
	static int initialized;

	if (!initialized) {
		struct child_process cp = CHILD_PROCESS_INIT;
		struct strbuf buf = STRBUF_INIT;
		char *p, *eol;

		hashmap_init(&sequences, (hashmap_cmp_fn)sequence_entry_cmp,
			     NULL, 0);

		argv_array_pushl(&cp.args, "infocmp", "-L", "-1", NULL);
		if (pipe_command(&cp, NULL, 0, &buf, 0, NULL, 0))
			strbuf_setlen(&buf, 0);

		for (eol = p = buf.buf; *p; p = eol + 1) {
			p = strchr(p, '=');
			if (!p)
				break;
			p++;
			eol = strchrnul(p, '\n');

			if (starts_with(p, "\\E")) {
				char *comma = memchr(p, ',', eol - p);
				struct escape_sequence_entry *e;

				p[0] = '^';
				p[1] = '[';
				FLEX_ALLOC_MEM(e, sequence, p, comma - p);
				hashmap_entry_init(&e->entry,
						   strhash(e->sequence));
				hashmap_add(&sequences, &e->entry);
			}
			if (!*eol)
				break;
		}
		initialized = 1;
	}

	return !!hashmap_get_from_hash(&sequences, strhash(sequence), sequence);
}

int read_key_without_echo(struct strbuf *buf)
{
	static int warning_displayed;
	int ch;

	if (warning_displayed || enable_non_canonical() < 0) {
		if (!warning_displayed) {
			warning("reading single keystrokes not supported on "
				"this platform; reading line instead");
			warning_displayed = 1;
		}

		return strbuf_getline(buf, stdin);
	}

	strbuf_reset(buf);
	ch = getchar();
	if (ch == EOF) {
		restore_term();
		return EOF;
	}
	strbuf_addch(buf, ch);

	if (ch == '\033' /* ESC */) {
		/*
		 * We are most likely looking at an Escape sequence. Let's try
		 * to read more bytes, waiting at most half a second, assuming
		 * that the sequence is complete if we did not receive any byte
		 * within that time.
		 *
		 * Start by replacing the Escape byte with ^[ */
		strbuf_splice(buf, buf->len - 1, 1, "^[", 2);

		/*
		 * Query the terminal capabilities once about all the Escape
		 * sequences it knows about, so that we can avoid waiting for
		 * half a second when we know that the sequence is complete.
		 */
		while (!is_known_escape_sequence(buf->buf)) {
			struct pollfd pfd = { .fd = 0, .events = POLLIN };

			if (poll(&pfd, 1, 500) < 1)
				break;

			ch = getchar();
			if (ch == EOF)
				return 0;
			strbuf_addch(buf, ch);
		}
	}

	restore_term();
	return 0;
}

#else

char *git_terminal_prompt(const char *prompt, int echo)
{
	return getpass(prompt);
}

int read_key_without_echo(struct strbuf *buf)
{
	static int warning_displayed;
	const char *res;

	if (!warning_displayed) {
		warning("reading single keystrokes not supported on this "
			"platform; reading line instead");
		warning_displayed = 1;
	}

	res = getpass("");
	strbuf_reset(buf);
	if (!res)
		return EOF;
	strbuf_addstr(buf, res);
	return 0;
}

#endif
debug log:

solving 35bca03d14 ...
found 35bca03d14 in git.git.git

git@vger.kernel.org list mirror (unofficial, one of many)

This inbox may be cloned and mirrored by anyone:

	git clone --mirror https://public-inbox.org/git
	git clone --mirror http://ou63pmih66umazou.onion/git
	git clone --mirror http://czquwvybam4bgbro.onion/git
	git clone --mirror http://hjrcffqmbrq6wope.onion/git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V1 git git/ https://public-inbox.org/git \
		git@vger.kernel.org
	public-inbox-index git

Example config snippet for mirrors.
Newsgroups are available over NNTP:
	nntp://news.public-inbox.org/inbox.comp.version-control.git
	nntp://7fh6tueqddpjyxjmgtdiueylzoqt6pt7hec3pukyptlmohoowvhde4yd.onion/inbox.comp.version-control.git
	nntp://ie5yzdi7fg72h7s4sdcztq5evakq23rdt33mfyfcddc5u3ndnw24ogqd.onion/inbox.comp.version-control.git
	nntp://4uok3hntl7oi7b4uf4rtfwefqeexfzil2w6kgk2jn5z2f764irre7byd.onion/inbox.comp.version-control.git
	nntp://news.gmane.io/gmane.comp.version-control.git
 note: .onion URLs require Tor: https://www.torproject.org/

code repositories for project(s) associated with this inbox:

	https://80x24.org/mirrors/git.git

AGPL code for this site: git clone https://public-inbox.org/public-inbox.git