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1 | #include <stdint.h> | ||
2 | #include <stdlib.h> | ||
3 | #include <string.h> | ||
4 | #include <unistd.h> | ||
5 | #include "exec.h" | ||
6 | #include "block-iter.h" | ||
7 | #include "buffer.h" | ||
8 | #include "change.h" | ||
9 | #include "command/error.h" | ||
10 | #include "command/macro.h" | ||
11 | #include "commands.h" | ||
12 | #include "ctags.h" | ||
13 | #include "move.h" | ||
14 | #include "msg.h" | ||
15 | #include "selection.h" | ||
16 | #include "tag.h" | ||
17 | #include "terminal/mode.h" | ||
18 | #include "util/bsearch.h" | ||
19 | #include "util/debug.h" | ||
20 | #include "util/numtostr.h" | ||
21 | #include "util/ptr-array.h" | ||
22 | #include "util/str-util.h" | ||
23 | #include "util/string-view.h" | ||
24 | #include "util/string.h" | ||
25 | #include "util/strtonum.h" | ||
26 | #include "util/xsnprintf.h" | ||
27 | #include "view.h" | ||
28 | #include "window.h" | ||
29 | |||
30 | enum { | ||
31 | IN = 1 << 0, | ||
32 | OUT = 1 << 1, | ||
33 | ERR = 1 << 2, | ||
34 | ALL = IN | OUT | ERR, | ||
35 | }; | ||
36 | |||
37 | static const struct { | ||
38 | char name[11]; | ||
39 | uint8_t flags; | ||
40 | } exec_map[] = { | ||
41 | [EXEC_BUFFER] = {"buffer", IN | OUT}, | ||
42 | [EXEC_COMMAND] = {"command", IN}, | ||
43 | [EXEC_ECHO] = {"echo", OUT}, | ||
44 | [EXEC_ERRMSG] = {"errmsg", ERR}, | ||
45 | [EXEC_EVAL] = {"eval", OUT}, | ||
46 | [EXEC_LINE] = {"line", IN}, | ||
47 | [EXEC_MSG] = {"msg", IN | OUT}, | ||
48 | [EXEC_NULL] = {"null", ALL}, | ||
49 | [EXEC_OPEN] = {"open", IN | OUT}, | ||
50 | [EXEC_OPEN_REL] = {"open-rel", IN}, | ||
51 | [EXEC_SEARCH] = {"search", IN}, | ||
52 | [EXEC_TAG] = {"tag", OUT}, | ||
53 | [EXEC_TTY] = {"tty", ALL}, | ||
54 | [EXEC_WORD] = {"word", IN}, | ||
55 | }; | ||
56 | |||
57 | 18 | UNITTEST { | |
58 | 18 | CHECK_BSEARCH_ARRAY(exec_map, name, strcmp); | |
59 | 18 | } | |
60 | |||
61 | 18 | ExecAction lookup_exec_action(const char *name, int fd) | |
62 | { | ||
63 | 18 | BUG_ON(fd < 0 || fd > 2); | |
64 | 18 | ssize_t i = BSEARCH_IDX(name, exec_map, vstrcmp); | |
65 |
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18 | return (i >= 0 && (exec_map[i].flags & 1u << fd)) ? i : EXEC_INVALID; |
66 | } | ||
67 | |||
68 | 1 | void collect_exec_actions(PointerArray *a, const char *prefix, int fd) | |
69 | { | ||
70 |
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1 | if (unlikely(fd < 0 || fd > 2)) { |
71 | return; | ||
72 | } | ||
73 | |||
74 | 1 | size_t prefix_len = strlen(prefix); | |
75 | 1 | unsigned int flag = 1u << fd; | |
76 |
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15 | for (size_t i = 0; i < ARRAYLEN(exec_map); i++) { |
77 | 14 | const char *action = exec_map[i].name; | |
78 |
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14 | if ((exec_map[i].flags & flag) && str_has_strn_prefix(action, prefix, prefix_len)) { |
79 | 8 | ptr_array_append(a, xstrdup(action)); | |
80 | } | ||
81 | } | ||
82 | } | ||
83 | |||
84 | ✗ | static void open_files_from_string(EditorState *e, const String *str) | |
85 | { | ||
86 | ✗ | PointerArray filenames = PTR_ARRAY_INIT; | |
87 | ✗ | for (size_t pos = 0, size = str->len; pos < size; ) { | |
88 | ✗ | char *filename = buf_next_line(str->buffer, &pos, size); | |
89 | ✗ | if (filename[0] != '\0') { | |
90 | ✗ | ptr_array_append(&filenames, filename); | |
91 | } | ||
92 | } | ||
93 | |||
94 | ✗ | if (filenames.count == 0) { | |
95 | ✗ | return; | |
96 | } | ||
97 | |||
98 | ✗ | ptr_array_append(&filenames, NULL); | |
99 | ✗ | window_open_files(e->window, (char**)filenames.ptrs, NULL); | |
100 | |||
101 | // TODO: re-enable this when the todo in allow_macro_recording() is done | ||
102 | // macro_command_hook(&e->macro, "open", (char**)filenames.ptrs); | ||
103 | |||
104 | ✗ | ptr_array_free_array(&filenames); | |
105 | } | ||
106 | |||
107 | ✗ | static void parse_and_activate_message(EditorState *e, const String *str) | |
108 | { | ||
109 | ✗ | if (unlikely(str->len == 0)) { | |
110 | ✗ | error_msg(&e->err, "child produced no output"); | |
111 | ✗ | return; | |
112 | } | ||
113 | |||
114 | ✗ | MessageArray *msgs = &e->messages; | |
115 | ✗ | size_t count = msgs->array.count; | |
116 | ✗ | size_t x; | |
117 | ✗ | if (!count || !buf_parse_size(str->buffer, str->len, &x) || !x) { | |
118 | ✗ | return; | |
119 | } | ||
120 | |||
121 | ✗ | msgs->pos = MIN(x - 1, count - 1); | |
122 | ✗ | activate_current_message(msgs, e->window); | |
123 | } | ||
124 | |||
125 | ✗ | static void parse_and_goto_tag(EditorState *e, const String *str) | |
126 | { | ||
127 | ✗ | ErrorBuffer *ebuf = &e->err; | |
128 | ✗ | if (unlikely(str->len == 0)) { | |
129 | ✗ | error_msg(ebuf, "child produced no output"); | |
130 | ✗ | return; | |
131 | } | ||
132 | |||
133 | // TODO: Read all lines and support adding messages for multiple tags | ||
134 | ✗ | size_t pos = 0; | |
135 | ✗ | StringView line = buf_slice_next_line(str->buffer, &pos, str->len); | |
136 | ✗ | if (line.length == 0) { | |
137 | return; | ||
138 | } | ||
139 | |||
140 | ✗ | MessageArray *msgs = &e->messages; | |
141 | ✗ | Tag tag; | |
142 | ✗ | bool parsed = parse_ctags_line(&tag, line.data, line.length); | |
143 | |||
144 | ✗ | if (parsed) { | |
145 | // `line` is a valid tags(5) file entry; handle it directly | ||
146 | ✗ | char cwd[8192]; | |
147 | ✗ | if (unlikely(!getcwd(cwd, sizeof cwd))) { | |
148 | ✗ | error_msg_errno(ebuf, "getcwd() failed"); | |
149 | ✗ | return; | |
150 | } | ||
151 | ✗ | StringView dir = strview_from_cstring(cwd); | |
152 | ✗ | clear_messages(msgs); | |
153 | ✗ | add_message_for_tag(msgs, &tag, &dir); | |
154 | } else { | ||
155 | // Treat `line` as a simple tag name (look it up in the tags(5) file) | ||
156 | ✗ | TagFile *tf = &e->tagfile; | |
157 | ✗ | clear_messages(msgs); | |
158 | ✗ | if (!load_tag_file(tf, ebuf)) { | |
159 | return; | ||
160 | } | ||
161 | ✗ | if (!tag_lookup(tf, msgs, ebuf, &line, e->buffer->abs_filename)) { | |
162 | return; | ||
163 | } | ||
164 | } | ||
165 | |||
166 | ✗ | activate_current_message_save(msgs, &e->bookmarks, e->view); | |
167 | } | ||
168 | |||
169 | ✗ | static void insert_to_selection ( | |
170 | View *view, | ||
171 | const String *output, | ||
172 | const SelectionInfo *info | ||
173 | ) { | ||
174 | ✗ | size_t del_count = info->eo - info->so; | |
175 | ✗ | buffer_replace_bytes(view, del_count, output->buffer, output->len); | |
176 | |||
177 | ✗ | if (output->len == 0) { | |
178 | // If the selection was replaced with 0 bytes then there's nothing | ||
179 | // new to select, so just unselect instead | ||
180 | ✗ | unselect(view); | |
181 | ✗ | return; | |
182 | } | ||
183 | |||
184 | // Keep the selection and adjust the size to the newly inserted text | ||
185 | ✗ | size_t so = info->so; | |
186 | ✗ | size_t eo = so + (output->len - 1); | |
187 | ✗ | block_iter_goto_offset(&view->cursor, info->swapped ? so : eo); | |
188 | ✗ | view->sel_so = info->swapped ? eo : so; | |
189 | ✗ | view->sel_eo = SEL_EO_RECALC; | |
190 | } | ||
191 | |||
192 | 5 | static const char **lines_and_columns_env(const Window *window) | |
193 | { | ||
194 | 5 | static char lines[DECIMAL_STR_MAX(window->edit_h)]; | |
195 | 5 | static char columns[DECIMAL_STR_MAX(window->edit_w)]; | |
196 | 5 | static const char *vars[] = { | |
197 | "LINES", lines, | ||
198 | "COLUMNS", columns, | ||
199 | NULL, | ||
200 | }; | ||
201 | |||
202 | 5 | buf_uint_to_str(window->edit_h, lines); | |
203 | 5 | buf_uint_to_str(window->edit_w, columns); | |
204 | 5 | return vars; | |
205 | } | ||
206 | |||
207 | 4 | static void show_spawn_error_msg(ErrorBuffer *ebuf, const String *errstr, int err) | |
208 | { | ||
209 |
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4 | if (err <= 0) { |
210 | // spawn() returned an error code instead of an exit code, which | ||
211 | // indicates that something failed before (or during) the child | ||
212 | // process exec(3p), or that an error occurred in wait_child(). | ||
213 | // In this case, error_msg() has already been called. | ||
214 | 1 | return; | |
215 | } | ||
216 | |||
217 | 3 | char msg[512]; | |
218 | 3 | msg[0] = '\0'; | |
219 |
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3 | if (errstr->len) { |
220 | 1 | size_t pos = 0; | |
221 | 1 | StringView line = buf_slice_next_line(errstr->buffer, &pos, errstr->len); | |
222 | 1 | BUG_ON(pos == 0); | |
223 | 1 | size_t len = MIN(line.length, sizeof(msg) - 8); | |
224 | 1 | xsnprintf(msg, sizeof(msg), ": \"%.*s\"", (int)len, line.data); | |
225 | } | ||
226 | |||
227 |
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3 | if (err >= 256) { |
228 | 1 | int sig = err >> 8; | |
229 | 1 | const char *str = strsignal(sig); | |
230 |
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1 | error_msg(ebuf, "Child received signal %d (%s)%s", sig, str ? str : "??", msg); |
231 | 2 | } else if (err) { | |
232 | 2 | error_msg(ebuf, "Child returned %d%s", err, msg); | |
233 | } | ||
234 | } | ||
235 | |||
236 | 45 | static SpawnAction spawn_action_from_exec_action(ExecAction action) | |
237 | { | ||
238 | 45 | BUG_ON(action == EXEC_INVALID); | |
239 |
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45 | if (action == EXEC_NULL) { |
240 | return SPAWN_NULL; | ||
241 |
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45 | } else if (action == EXEC_TTY) { |
242 | return SPAWN_TTY; | ||
243 | } else { | ||
244 | 15 | return SPAWN_PIPE; | |
245 | } | ||
246 | } | ||
247 | |||
248 | 15 | ssize_t handle_exec ( | |
249 | EditorState *e, | ||
250 | const char **argv, | ||
251 | ExecAction actions[3], | ||
252 | ExecFlags exec_flags | ||
253 | ) { | ||
254 | 15 | View *view = e->view; | |
255 | 15 | const BlockIter saved_cursor = view->cursor; | |
256 | 15 | const ssize_t saved_sel_so = view->sel_so; | |
257 | 15 | const ssize_t saved_sel_eo = view->sel_eo; | |
258 | 15 | char *alloc = NULL; | |
259 | 15 | bool output_to_buffer = (actions[STDOUT_FILENO] == EXEC_BUFFER); | |
260 | 15 | bool input_from_buffer = false; | |
261 | 15 | bool replace_unselected_input = false; | |
262 | 15 | bool quiet = (exec_flags & EXECFLAG_QUIET); | |
263 | |||
264 | 75 | SpawnContext ctx = { | |
265 | .argv = argv, | ||
266 | .outputs = {STRING_INIT, STRING_INIT}, | ||
267 | .quiet = quiet, | ||
268 | 15 | .ebuf = &e->err, | |
269 |
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15 | .env = output_to_buffer ? lines_and_columns_env(e->window) : NULL, |
270 | .actions = { | ||
271 | 15 | spawn_action_from_exec_action(actions[0]), | |
272 | 15 | spawn_action_from_exec_action(actions[1]), | |
273 | 15 | spawn_action_from_exec_action(actions[2]), | |
274 | }, | ||
275 | }; | ||
276 | |||
277 |
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15 | switch (actions[STDIN_FILENO]) { |
278 | ✗ | case EXEC_LINE: | |
279 | ✗ | input_from_buffer = true; | |
280 | ✗ | if (!view->selection) { | |
281 | ✗ | move_bol(view); | |
282 | ✗ | StringView line = block_iter_get_line(&view->cursor); | |
283 | ✗ | ctx.input.length = line.length; | |
284 | ✗ | replace_unselected_input = true; | |
285 | } | ||
286 | break; | ||
287 | 3 | case EXEC_BUFFER: | |
288 | 3 | input_from_buffer = true; | |
289 |
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3 | if (!view->selection) { |
290 | 3 | const Block *blk; | |
291 |
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6 | block_for_each(blk, &view->buffer->blocks) { |
292 | 3 | ctx.input.length += blk->size; | |
293 | } | ||
294 | 3 | move_bof(view); | |
295 | 3 | replace_unselected_input = true; | |
296 | } | ||
297 | break; | ||
298 | ✗ | case EXEC_WORD: | |
299 | ✗ | input_from_buffer = true; | |
300 | ✗ | if (!view->selection) { | |
301 | ✗ | StringView line; | |
302 | ✗ | size_t offset = fetch_this_line(&view->cursor, &line); | |
303 | ✗ | size_t start = offset; | |
304 | ✗ | size_t end = get_bounds_for_word_under_cursor(line, &start); | |
305 | ✗ | if (end == 0) { | |
306 | break; | ||
307 | } | ||
308 | |||
309 | // If `start` is less than `offset` here, the subtraction wraps | ||
310 | // but nevertheless works as intended | ||
311 | ✗ | view->cursor.offset += start - offset; // == view->cursor.offset -= (offset - start) | |
312 | |||
313 | ✗ | ctx.input.length = end - start; | |
314 | ✗ | BUG_ON(view->cursor.offset >= view->cursor.blk->size); | |
315 | ✗ | replace_unselected_input = true; | |
316 | } | ||
317 | break; | ||
318 | ✗ | case EXEC_MSG: { | |
319 | ✗ | String messages = dump_messages(&e->messages); | |
320 | ✗ | ctx.input = strview_from_string(&messages); | |
321 | ✗ | alloc = messages.buffer; | |
322 | ✗ | break; | |
323 | } | ||
324 | ✗ | case EXEC_COMMAND: { | |
325 | ✗ | String hist = history_dump(&e->command_history); | |
326 | ✗ | ctx.input = strview_from_string(&hist); | |
327 | ✗ | alloc = hist.buffer; | |
328 | ✗ | break; | |
329 | } | ||
330 | ✗ | case EXEC_SEARCH: { | |
331 | ✗ | String hist = history_dump(&e->search_history); | |
332 | ✗ | ctx.input = strview_from_string(&hist); | |
333 | ✗ | alloc = hist.buffer; | |
334 | ✗ | break; | |
335 | } | ||
336 | ✗ | case EXEC_OPEN: { | |
337 | ✗ | String hist = file_history_dump(&e->file_history); | |
338 | ✗ | ctx.input = strview_from_string(&hist); | |
339 | ✗ | alloc = hist.buffer; | |
340 | ✗ | break; | |
341 | } | ||
342 | ✗ | case EXEC_OPEN_REL: { | |
343 | ✗ | String hist = file_history_dump_relative(&e->file_history); | |
344 | ✗ | ctx.input = strview_from_string(&hist); | |
345 | ✗ | alloc = hist.buffer; | |
346 | ✗ | break; | |
347 | } | ||
348 | case EXEC_NULL: | ||
349 | case EXEC_TTY: | ||
350 | break; | ||
351 | // These can't be used as input actions and should be prevented by | ||
352 | // the validity checks in cmd_exec(): | ||
353 | ✗ | case EXEC_TAG: | |
354 | case EXEC_ECHO: | ||
355 | case EXEC_EVAL: | ||
356 | case EXEC_ERRMSG: | ||
357 | case EXEC_INVALID: | ||
358 | default: | ||
359 | − | BUG("unhandled action"); | |
360 | return -1; | ||
361 | } | ||
362 | |||
363 | // This could be left uninitialized, but doing so makes some old compilers | ||
364 | // produce false-positive "-Wmaybe-uninitialized" warnings | ||
365 | 15 | SelectionInfo info = {.si = view->cursor}; | |
366 | |||
367 |
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15 | if (view->selection && (input_from_buffer || output_to_buffer)) { |
368 | ✗ | info = init_selection(view); | |
369 | ✗ | view->cursor = info.si; | |
370 | ✗ | if (input_from_buffer) { | |
371 | ✗ | ctx.input.length = info.eo - info.so; | |
372 | } | ||
373 | } | ||
374 | |||
375 |
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15 | if (input_from_buffer) { |
376 | 3 | alloc = block_iter_get_bytes(&view->cursor, ctx.input.length); | |
377 | 3 | ctx.input.data = alloc; | |
378 | } | ||
379 | |||
380 | 15 | yield_terminal(e, quiet); | |
381 | 15 | int err = spawn(&ctx); | |
382 |
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15 | bool prompt = (err >= 0) && (exec_flags & EXECFLAG_PROMPT); |
383 | 15 | resume_terminal(e, quiet, prompt); | |
384 | 15 | free(alloc); | |
385 | |||
386 |
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15 | if (err != 0) { |
387 | 4 | show_spawn_error_msg(&e->err, &ctx.outputs[1], err); | |
388 | 4 | string_free(&ctx.outputs[0]); | |
389 | 4 | string_free(&ctx.outputs[1]); | |
390 | 4 | view->cursor = saved_cursor; | |
391 | 4 | return -1; | |
392 | } | ||
393 | |||
394 | 11 | string_free(&ctx.outputs[1]); | |
395 | 11 | String *output = &ctx.outputs[0]; | |
396 | 11 | bool strip_trailing_newline = (exec_flags & EXECFLAG_STRIP_NL); | |
397 | 11 | if ( | |
398 | strip_trailing_newline | ||
399 |
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11 | && output_to_buffer |
400 | ✗ | && output->len > 0 | |
401 | ✗ | && output->buffer[output->len - 1] == '\n' | |
402 | ) { | ||
403 | ✗ | output->len--; | |
404 | ✗ | if (output->len > 0 && output->buffer[output->len - 1] == '\r') { | |
405 | ✗ | output->len--; | |
406 | } | ||
407 | } | ||
408 | |||
409 |
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11 | if (!output_to_buffer) { |
410 | 6 | view->cursor = saved_cursor; | |
411 | 6 | view->sel_so = saved_sel_so; | |
412 | 6 | view->sel_eo = saved_sel_eo; | |
413 | 6 | mark_all_lines_changed(view->buffer); | |
414 | } | ||
415 | |||
416 |
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11 | switch (actions[STDOUT_FILENO]) { |
417 | 5 | case EXEC_BUFFER: | |
418 |
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5 | if (view->selection) { |
419 | ✗ | insert_to_selection(view, output, &info); | |
420 | } else { | ||
421 |
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5 | size_t del_count = replace_unselected_input ? ctx.input.length : 0; |
422 | 5 | buffer_replace_bytes(view, del_count, output->buffer, output->len); | |
423 | } | ||
424 | break; | ||
425 | ✗ | case EXEC_ECHO: | |
426 | ✗ | if (output->len) { | |
427 | ✗ | size_t pos = 0; | |
428 | ✗ | StringView line = buf_slice_next_line(output->buffer, &pos, output->len); | |
429 | ✗ | info_msg(&e->err, "%.*s", (int)line.length, line.data); | |
430 | } | ||
431 | break; | ||
432 | ✗ | case EXEC_MSG: | |
433 | ✗ | parse_and_activate_message(e, output); | |
434 | ✗ | break; | |
435 | ✗ | case EXEC_OPEN: | |
436 | ✗ | open_files_from_string(e, output); | |
437 | ✗ | break; | |
438 | ✗ | case EXEC_TAG: | |
439 | ✗ | parse_and_goto_tag(e, output); | |
440 | ✗ | break; | |
441 | ✗ | case EXEC_EVAL: | |
442 | ✗ | exec_normal_config(e, strview_from_string(output)); | |
443 | ✗ | break; | |
444 | case EXEC_NULL: | ||
445 | case EXEC_TTY: | ||
446 | break; | ||
447 | // These can't be used as output actions | ||
448 | ✗ | case EXEC_COMMAND: | |
449 | case EXEC_ERRMSG: | ||
450 | case EXEC_LINE: | ||
451 | case EXEC_OPEN_REL: | ||
452 | case EXEC_SEARCH: | ||
453 | case EXEC_WORD: | ||
454 | case EXEC_INVALID: | ||
455 | default: | ||
456 | − | BUG("unhandled action"); | |
457 | return -1; | ||
458 | } | ||
459 | |||
460 | 11 | size_t output_len = output->len; | |
461 | 11 | string_free(output); | |
462 | 11 | return output_len; | |
463 | } | ||
464 | |||
465 | 15 | void yield_terminal(EditorState *e, bool quiet) | |
466 | { | ||
467 |
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15 | if (e->flags & EFLAG_HEADLESS) { |
468 | return; | ||
469 | } | ||
470 | |||
471 | ✗ | if (quiet) { | |
472 | ✗ | term_raw_isig(); | |
473 | } else { | ||
474 | ✗ | e->child_controls_terminal = true; | |
475 | ✗ | ui_end(e); | |
476 | ✗ | term_cooked(); | |
477 | } | ||
478 | } | ||
479 | |||
480 | 15 | void resume_terminal(EditorState *e, bool quiet, bool prompt) | |
481 | { | ||
482 |
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15 | if (e->flags & EFLAG_HEADLESS) { |
483 | return; | ||
484 | } | ||
485 | |||
486 | ✗ | term_raw(); | |
487 | ✗ | if (!quiet && e->child_controls_terminal) { | |
488 | ✗ | if (prompt) { | |
489 | ✗ | any_key(&e->terminal, e->options.esc_timeout); | |
490 | } | ||
491 | ✗ | ui_start(e); | |
492 | ✗ | e->child_controls_terminal = false; | |
493 | } | ||
494 | } | ||
495 |