git@vger.kernel.org mailing list mirror (one of many)
 help / color / mirror / code / Atom feed
blob 1b2564042ac60c1f2a2e6b7f7ebf85b992b59a3e 4974 bytes (raw)
name: compat/terminal.c 	 # note: path name is non-authoritative(*)

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

#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;
}

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);
	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 1b2564042a ...
found 1b2564042a in https://80x24.org/mirrors/git.git

(*) Git path names are given by the tree(s) the blob belongs to.
    Blobs themselves have no identifier aside from the hash of its contents.^

Code repositories for project(s) associated with this public inbox

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

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).