| 1 | /* xscreensaver, Copyright (c) 2012-2020 Jamie Zawinski <jwz@jwz.org> |
| 2 | * |
| 3 | * Permission to use, copy, modify, distribute, and sell this software and its |
| 4 | * documentation for any purpose is hereby granted without fee, provided that |
| 5 | * the above copyright notice appear in all copies and that both that |
| 6 | * copyright notice and this permission notice appear in supporting |
| 7 | * documentation. No representations are made about the suitability of this |
| 8 | * software for any purpose. It is provided "as is" without express or |
| 9 | * implied warranty. |
| 10 | * |
| 11 | * Running programs under a pipe or pty and returning bytes from them. |
| 12 | * Uses these X resources: |
| 13 | * |
| 14 | * program: What to run. Usually "xscreensaver-text". |
| 15 | * relaunchDelay: secs How long after the command dies before restarting. |
| 16 | * usePty: bool Whether to run the command interactively. |
| 17 | * metaSendsESC: bool Whether to send Alt-x as ESC x in pty-mode. |
| 18 | * swapBSDEL: bool Swap Backspace and Delete in pty-mode. |
| 19 | * |
| 20 | * On iOS and Android, textclient-mobile.c is used instead. |
| 21 | */ |
| 22 | |
| 23 | #include "utils.h" |
| 24 | |
| 25 | #if !defined(HAVE_IPHONE) && !defined(HAVE_ANDROID) /* whole file */ |
| 26 | |
| 27 | #include "textclient.h" |
| 28 | #include "resources.h" |
| 29 | |
| 30 | #ifndef HAVE_COCOA |
| 31 | # define XK_MISCELLANY |
| 32 | # include <X11/keysymdef.h> |
| 33 | # include <X11/Xatom.h> |
| 34 | # include <X11/Intrinsic.h> |
| 35 | #endif |
| 36 | |
| 37 | #include <stdio.h> |
| 38 | |
| 39 | #include <signal.h> |
| 40 | #include <sys/wait.h> |
| 41 | |
| 42 | #ifdef HAVE_UNISTD_H |
| 43 | # include <unistd.h> |
| 44 | # include <fcntl.h> /* for O_RDWR */ |
| 45 | #endif |
| 46 | |
| 47 | #ifdef HAVE_FORKPTY |
| 48 | # include <sys/ioctl.h> |
| 49 | # ifdef HAVE_PTY_H |
| 50 | # include <pty.h> |
| 51 | # endif |
| 52 | # ifdef HAVE_UTIL_H |
| 53 | # include <util.h> |
| 54 | # endif |
| 55 | # ifdef HAVE_SYS_TERMIOS_H |
| 56 | # include <sys/termios.h> |
| 57 | # endif |
| 58 | #endif /* HAVE_FORKPTY */ |
| 59 | |
| 60 | #undef DEBUG |
| 61 | |
| 62 | extern const char *progname; |
| 63 | |
| 64 | struct text_data { |
| 65 | Display *dpy; |
| 66 | char *program; |
| 67 | int pix_w, pix_h, char_w, char_h; |
| 68 | int max_lines; |
| 69 | |
| 70 | Bool pty_p; |
| 71 | XtIntervalId pipe_timer; |
| 72 | FILE *pipe; |
| 73 | pid_t pid; |
| 74 | XtInputId pipe_id; |
| 75 | Bool input_available_p; |
| 76 | Time subproc_relaunch_delay; |
| 77 | XComposeStatus compose; |
| 78 | |
| 79 | Bool meta_sends_esc_p; |
| 80 | Bool swap_bs_del_p; |
| 81 | Bool meta_done_once; |
| 82 | unsigned int meta_mask; |
| 83 | |
| 84 | const char *out_buffer; |
| 85 | int out_column; |
| 86 | }; |
| 87 | |
| 88 | |
| 89 | static void |
| 90 | subproc_cb (XtPointer closure, int *source, XtInputId *id) |
| 91 | { |
| 92 | text_data *d = (text_data *) closure; |
| 93 | # ifdef DEBUG |
| 94 | if (! d->input_available_p) |
| 95 | fprintf (stderr, "%s: textclient: input available\n", progname); |
| 96 | # endif |
| 97 | d->input_available_p = True; |
| 98 | } |
| 99 | |
| 100 | |
| 101 | # define BACKSLASH(c) \ |
| 102 | (! ((c >= 'a' && c <= 'z') || \ |
| 103 | (c >= 'A' && c <= 'Z') || \ |
| 104 | (c >= '0' && c <= '9') || \ |
| 105 | c == '.' || c == '_' || c == '-' || c == '+' || c == '/')) |
| 106 | |
| 107 | #ifdef HAVE_COCOA |
| 108 | static char * |
| 109 | escape_str (char *s, const char *src) |
| 110 | { |
| 111 | while (*src) { |
| 112 | char c = *src++; |
| 113 | if (BACKSLASH(c)) *s++ = '\\'; |
| 114 | *s++ = c; |
| 115 | } |
| 116 | return s; |
| 117 | } |
| 118 | #endif |
| 119 | |
| 120 | |
| 121 | /* Let's see if we're able to fork and exec at all. Thanks, macOS. |
| 122 | */ |
| 123 | static Bool |
| 124 | selftest (void) |
| 125 | { |
| 126 | static Bool done = False; |
| 127 | pid_t pid; |
| 128 | char buf [255]; |
| 129 | if (done) return True; |
| 130 | |
| 131 | pid = fork (); |
| 132 | switch ((int) pid) |
| 133 | { |
| 134 | case -1: |
| 135 | sprintf (buf, "%s: textclient: selftest: couldn't fork", progname); |
| 136 | perror (buf); |
| 137 | return False; |
| 138 | |
| 139 | case 0: /* child */ |
| 140 | { |
| 141 | char * const av[] = { "/bin/sh", "-c", "true", 0 }; |
| 142 | execvp (av[0], av); |
| 143 | exit (1); /* exits child fork */ |
| 144 | break; |
| 145 | } |
| 146 | |
| 147 | default: /* parent */ |
| 148 | { |
| 149 | int status = -1; |
| 150 | int i; |
| 151 | /* Busy-loops are bad mmmmkayyyy */ |
| 152 | struct timeval tv; |
| 153 | tv.tv_sec = 0; |
| 154 | tv.tv_usec = 100000L; /* 0.1 sec */ |
| 155 | for (i = 0; i < 50; i++) { /* 5 sec max */ |
| 156 | pid_t pid2 = waitpid (pid, &status, 0); |
| 157 | if (pid == pid2) break; |
| 158 | (void) select (0, 0, 0, 0, &tv); |
| 159 | } |
| 160 | |
| 161 | if (status != 0) |
| 162 | { |
| 163 | # ifdef DEBUG |
| 164 | fprintf (stderr, "%s: selftest: textclient: status %d\n", |
| 165 | progname, status); |
| 166 | # endif |
| 167 | return False; |
| 168 | } |
| 169 | else |
| 170 | { |
| 171 | # ifdef DEBUG |
| 172 | fprintf (stderr, "%s: textclient: selftest ok\n", progname); |
| 173 | # endif |
| 174 | done = True; |
| 175 | } |
| 176 | break; |
| 177 | } |
| 178 | } |
| 179 | |
| 180 | return True; |
| 181 | } |
| 182 | |
| 183 | |
| 184 | static void start_timer (text_data *d); |
| 185 | |
| 186 | static void |
| 187 | launch_text_generator (text_data *d) |
| 188 | { |
| 189 | XtAppContext app = XtDisplayToApplicationContext (d->dpy); |
| 190 | char buf[255]; |
| 191 | const char *oprogram = d->program; |
| 192 | char *s; |
| 193 | |
| 194 | size_t oprogram_size = strlen(oprogram); |
| 195 | size_t len; |
| 196 | |
| 197 | # ifdef HAVE_COCOA |
| 198 | /* /bin/sh on OS X 10.10 wipes out the PATH. */ |
| 199 | const char *path = getenv("PATH"); |
| 200 | size_t cmd_capacity = (oprogram_size + strlen(path)) * 2 + 100; |
| 201 | char *cmd = s = malloc (cmd_capacity); |
| 202 | strcpy (s, "export PATH="); |
| 203 | s += strlen (s); |
| 204 | s = escape_str (s, path); |
| 205 | strcpy (s, "; "); |
| 206 | s += strlen (s); |
| 207 | # else |
| 208 | char *cmd = s = malloc ((strlen(oprogram)) * 2 + 100); |
| 209 | # endif |
| 210 | |
| 211 | if (!selftest()) |
| 212 | { |
| 213 | if (!d->out_buffer || !*d->out_buffer) |
| 214 | d->out_buffer = "Can't exec; Gatekeeper problem?\r\n\r\n"; |
| 215 | start_timer (d); |
| 216 | return; |
| 217 | } |
| 218 | |
| 219 | strcpy (s, "( "); |
| 220 | strcat (s, oprogram); |
| 221 | s += strlen (s); |
| 222 | |
| 223 | /* Kludge! Special-case "xscreensaver-text" to tell it how wide |
| 224 | the screen is. We used to do this by just always feeding |
| 225 | `program' through sprintf() and setting the default value to |
| 226 | "xscreensaver-text --cols %d", but that makes things blow up |
| 227 | if someone ever uses a --program that includes a % anywhere. |
| 228 | */ |
| 229 | len = 17; /* strlen("xscreensaver-text") */ |
| 230 | if (oprogram_size >= len && |
| 231 | !memcmp (oprogram, "xscreensaver-text", len) && |
| 232 | (oprogram[len] == ' ' || !oprogram[len])) |
| 233 | { |
| 234 | /* strstr is sloppy here. Technically, we should be parsing the command |
| 235 | line to identify flags and their arguments. This will blow up if one |
| 236 | of those pesky end users could set .textLiteral to "--cols". |
| 237 | */ |
| 238 | if (d->char_w && !strstr (oprogram, "--cols ")) |
| 239 | sprintf (s, " --cols %d", d->char_w); |
| 240 | if (d->max_lines && !strstr (oprogram, "--lines ")) |
| 241 | sprintf (s, " --lines %d", d->max_lines); |
| 242 | s += strlen(s); |
| 243 | |
| 244 | # ifdef HAVE_COCOA |
| 245 | /* Also special-case "xscreensaver-text" to specify the text content on |
| 246 | the command line. defaults(1) on macOS doesn't know about the default |
| 247 | screenhack resources that don't make it into the |
| 248 | ~/Library/Preferences/ByHost/org.jwz.xscreensaver.*.plist. |
| 249 | */ |
| 250 | |
| 251 | char *text_mode_flag = " --date"; |
| 252 | char *value_res = NULL; |
| 253 | char *text_mode = get_string_resource (d->dpy, "textMode", "String"); |
| 254 | |
| 255 | if (text_mode) |
| 256 | { |
| 257 | if (!strcmp (text_mode, "1") || !strcmp (text_mode, "literal")) |
| 258 | { |
| 259 | text_mode_flag = " --text"; |
| 260 | value_res = "textLiteral"; |
| 261 | } |
| 262 | else if (!strcmp (text_mode, "2") || !strcmp (text_mode, "file")) |
| 263 | { |
| 264 | text_mode_flag = " --file"; |
| 265 | value_res = "textFile"; |
| 266 | } |
| 267 | else if (!strcmp (text_mode, "3") || !strcmp (text_mode, "url")) |
| 268 | { |
| 269 | text_mode_flag = " --url"; |
| 270 | value_res = "textURL"; |
| 271 | } |
| 272 | else if (!strcmp (text_mode, "4") || !strcmp (text_mode, "program")) |
| 273 | { |
| 274 | text_mode_flag = " --program"; |
| 275 | value_res = "textProgram"; |
| 276 | } |
| 277 | |
| 278 | free (text_mode); |
| 279 | } |
| 280 | |
| 281 | strcpy (s, text_mode_flag); |
| 282 | s += strlen (s); |
| 283 | |
| 284 | if (value_res) |
| 285 | { |
| 286 | size_t old_s = s - cmd; |
| 287 | char *value = get_string_resource (d->dpy, value_res, ""); |
| 288 | if (!value) |
| 289 | value = strdup(""); |
| 290 | cmd = realloc(cmd, cmd_capacity + strlen(value) * 2); |
| 291 | s = cmd + old_s; |
| 292 | *s = ' '; |
| 293 | ++s; |
| 294 | s = escape_str(s, value); |
| 295 | free(value); |
| 296 | } |
| 297 | # endif /* HAVE_COCOA */ |
| 298 | } |
| 299 | |
| 300 | strcpy (s, " ) 2>&1"); |
| 301 | |
| 302 | # ifdef DEBUG |
| 303 | fprintf (stderr, "%s: textclient: launch %s: %s\n", progname, |
| 304 | (d->pty_p ? "pty" : "pipe"), cmd); |
| 305 | # endif |
| 306 | |
| 307 | #ifdef HAVE_FORKPTY |
| 308 | if (d->pty_p) |
| 309 | { |
| 310 | int fd; |
| 311 | struct winsize ws; |
| 312 | |
| 313 | ws.ws_col = d->char_w; |
| 314 | ws.ws_row = d->char_h; |
| 315 | ws.ws_xpixel = d->pix_w; |
| 316 | ws.ws_ypixel = d->pix_h; |
| 317 | |
| 318 | d->pipe = 0; |
| 319 | |
| 320 | # ifdef HAVE_COCOA |
| 321 | if (getenv ("MallocScribble")) |
| 322 | /* This is here to stop me from wasting my time trying to answer |
| 323 | this question the next time I forget about it. */ |
| 324 | fprintf (stderr, "%s: WARNING: forkpty hates 'Enable Guard Malloc'\n", |
| 325 | progname); |
| 326 | # endif |
| 327 | |
| 328 | if ((d->pid = forkpty(&fd, NULL, NULL, &ws)) < 0) |
| 329 | { |
| 330 | /* Unable to fork */ |
| 331 | sprintf (buf, "%.100s: forkpty", progname); |
| 332 | perror (buf); |
| 333 | } |
| 334 | else if (!d->pid) |
| 335 | { |
| 336 | /* This is the child fork. */ |
| 337 | char *av[10]; |
| 338 | int i = 0; |
| 339 | if (putenv ("TERM=vt100")) |
| 340 | abort(); |
| 341 | av[i++] = "/bin/sh"; |
| 342 | av[i++] = "-c"; |
| 343 | av[i++] = cmd; |
| 344 | av[i] = 0; |
| 345 | # ifdef DEBUG |
| 346 | { |
| 347 | int j; |
| 348 | fprintf (stderr, "%s: textclient: execvp:", progname); |
| 349 | for (j = 0; j < i; j++) |
| 350 | fprintf (stderr, " %s", av[j]); |
| 351 | fprintf (stderr, "\n"); |
| 352 | } |
| 353 | # endif |
| 354 | execvp (av[0], av); |
| 355 | sprintf (buf, "%.100s: %.100s", progname, oprogram); |
| 356 | perror (buf); |
| 357 | exit (1); |
| 358 | } |
| 359 | else |
| 360 | { |
| 361 | /* This is the parent fork. */ |
| 362 | if (d->pipe) abort(); |
| 363 | d->pipe = fdopen (fd, "r+"); |
| 364 | if (d->pipe_id) abort(); |
| 365 | d->pipe_id = |
| 366 | XtAppAddInput (app, fileno (d->pipe), |
| 367 | (XtPointer) (XtInputReadMask | XtInputExceptMask), |
| 368 | subproc_cb, (XtPointer) d); |
| 369 | # ifdef DEBUG |
| 370 | fprintf (stderr, "%s: textclient: pid = %d\n", progname, d->pid); |
| 371 | # endif |
| 372 | } |
| 373 | } |
| 374 | else |
| 375 | #endif /* HAVE_FORKPTY */ |
| 376 | { |
| 377 | /* don't mess up controlling terminal on "-pipe -program tcsh". */ |
| 378 | static int protected_stdin_p = 0; |
| 379 | if (! protected_stdin_p) { |
| 380 | fclose (stdin); |
| 381 | open ("/dev/null", O_RDWR); /* re-allocate fd 0 */ |
| 382 | protected_stdin_p = 1; |
| 383 | } |
| 384 | |
| 385 | if (d->pipe) abort(); |
| 386 | if ((d->pipe = popen (cmd, "r"))) |
| 387 | { |
| 388 | if (d->pipe_id) abort(); |
| 389 | d->pipe_id = |
| 390 | XtAppAddInput (app, fileno (d->pipe), |
| 391 | (XtPointer) (XtInputReadMask | XtInputExceptMask), |
| 392 | subproc_cb, (XtPointer) d); |
| 393 | # ifdef DEBUG |
| 394 | fprintf (stderr, "%s: textclient: popen\n", progname); |
| 395 | # endif |
| 396 | } |
| 397 | else |
| 398 | { |
| 399 | sprintf (buf, "%.100s: %.100s", progname, cmd); |
| 400 | perror (buf); |
| 401 | } |
| 402 | } |
| 403 | |
| 404 | free (cmd); |
| 405 | } |
| 406 | |
| 407 | |
| 408 | static void |
| 409 | relaunch_generator_timer (XtPointer closure, XtIntervalId *id) |
| 410 | { |
| 411 | text_data *d = (text_data *) closure; |
| 412 | /* if (!d->pipe_timer) abort(); */ |
| 413 | d->pipe_timer = 0; |
| 414 | # ifdef DEBUG |
| 415 | fprintf (stderr, "%s: textclient: launch timer fired\n", progname); |
| 416 | # endif |
| 417 | launch_text_generator (d); |
| 418 | } |
| 419 | |
| 420 | |
| 421 | static void |
| 422 | start_timer (text_data *d) |
| 423 | { |
| 424 | XtAppContext app = XtDisplayToApplicationContext (d->dpy); |
| 425 | |
| 426 | # ifdef DEBUG |
| 427 | fprintf (stderr, "%s: textclient: relaunching in %d\n", progname, |
| 428 | (int) d->subproc_relaunch_delay); |
| 429 | # endif |
| 430 | if (d->pipe_timer) |
| 431 | XtRemoveTimeOut (d->pipe_timer); |
| 432 | d->pipe_timer = |
| 433 | XtAppAddTimeOut (app, d->subproc_relaunch_delay, |
| 434 | relaunch_generator_timer, |
| 435 | (XtPointer) d); |
| 436 | } |
| 437 | |
| 438 | |
| 439 | static void |
| 440 | close_pipe (text_data *d) |
| 441 | { |
| 442 | if (d->pid) |
| 443 | { |
| 444 | # ifdef DEBUG |
| 445 | fprintf (stderr, "%s: textclient: kill %d\n", progname, d->pid); |
| 446 | # endif |
| 447 | kill (d->pid, SIGTERM); |
| 448 | } |
| 449 | d->pid = 0; |
| 450 | |
| 451 | if (d->pipe_id) |
| 452 | XtRemoveInput (d->pipe_id); |
| 453 | d->pipe_id = 0; |
| 454 | |
| 455 | if (d->pipe) |
| 456 | { |
| 457 | # ifdef DEBUG |
| 458 | fprintf (stderr, "%s: textclient: pclose\n", progname); |
| 459 | # endif |
| 460 | pclose (d->pipe); |
| 461 | } |
| 462 | d->pipe = 0; |
| 463 | |
| 464 | |
| 465 | } |
| 466 | |
| 467 | |
| 468 | void |
| 469 | textclient_reshape (text_data *d, |
| 470 | int pix_w, int pix_h, |
| 471 | int char_w, int char_h, |
| 472 | int max_lines) |
| 473 | { |
| 474 | # if defined(HAVE_FORKPTY) && defined(TIOCSWINSZ) |
| 475 | |
| 476 | d->pix_w = pix_w; |
| 477 | d->pix_h = pix_h; |
| 478 | d->char_w = char_w; |
| 479 | d->char_h = char_h; |
| 480 | d->max_lines = max_lines; |
| 481 | |
| 482 | # ifdef DEBUG |
| 483 | fprintf (stderr, "%s: textclient: reshape: %dx%d, %dx%d\n", progname, |
| 484 | pix_w, pix_h, char_w, char_h); |
| 485 | # endif |
| 486 | |
| 487 | if (d->pid && d->pipe) |
| 488 | { |
| 489 | /* Tell the sub-process that the screen size has changed. */ |
| 490 | struct winsize ws; |
| 491 | ws.ws_col = char_w; |
| 492 | ws.ws_row = char_h; |
| 493 | ws.ws_xpixel = pix_w; |
| 494 | ws.ws_ypixel = pix_h; |
| 495 | ioctl (fileno (d->pipe), TIOCSWINSZ, &ws); |
| 496 | kill (d->pid, SIGWINCH); |
| 497 | # ifdef DEBUG |
| 498 | fprintf (stderr, "%s: textclient: SIGWINCH\n", progname); |
| 499 | # endif |
| 500 | } |
| 501 | # endif /* HAVE_FORKPTY && TIOCSWINSZ */ |
| 502 | |
| 503 | |
| 504 | /* If we're running xscreensaver-text, then kill and restart it any |
| 505 | time the window is resized so that it gets an updated --cols arg |
| 506 | right away. But if we're running something else, leave it alone. |
| 507 | */ |
| 508 | if (!strcmp (d->program, "xscreensaver-text")) |
| 509 | { |
| 510 | # ifdef DEBUG |
| 511 | fprintf (stderr, "%s: textclient: reshape relaunch\n", progname); |
| 512 | # endif |
| 513 | close_pipe (d); |
| 514 | d->input_available_p = False; |
| 515 | start_timer (d); |
| 516 | } |
| 517 | } |
| 518 | |
| 519 | |
| 520 | text_data * |
| 521 | textclient_open (Display *dpy) |
| 522 | { |
| 523 | text_data *d = (text_data *) calloc (1, sizeof (*d)); |
| 524 | |
| 525 | # ifdef DEBUG |
| 526 | fprintf (stderr, "%s: textclient: init\n", progname); |
| 527 | # endif |
| 528 | |
| 529 | d->dpy = dpy; |
| 530 | |
| 531 | if (get_boolean_resource (dpy, "usePty", "UsePty")) |
| 532 | { |
| 533 | # ifdef HAVE_FORKPTY |
| 534 | d->pty_p = True; |
| 535 | # else |
| 536 | fprintf (stderr, |
| 537 | "%s: no pty support on this system; using a pipe instead.\n", |
| 538 | progname); |
| 539 | # endif |
| 540 | } |
| 541 | |
| 542 | d->subproc_relaunch_delay = |
| 543 | get_integer_resource (dpy, "relaunchDelay", "Time"); |
| 544 | if (d->subproc_relaunch_delay < 1) |
| 545 | d->subproc_relaunch_delay = 1; |
| 546 | d->subproc_relaunch_delay *= 1000; |
| 547 | |
| 548 | |
| 549 | d->meta_sends_esc_p = get_boolean_resource (dpy, "metaSendsESC", "Boolean"); |
| 550 | d->swap_bs_del_p = get_boolean_resource (dpy, "swapBSDEL", "Boolean"); |
| 551 | |
| 552 | d->program = get_string_resource (dpy, "program", "Program"); |
| 553 | |
| 554 | |
| 555 | # ifdef HAVE_FORKPTY |
| 556 | /* Kludge for MacOS standalone mode: see OSX/SaverRunner.m. */ |
| 557 | { |
| 558 | const char *s = getenv ("XSCREENSAVER_STANDALONE"); |
| 559 | if (s && *s && strcmp(s, "0")) |
| 560 | { |
| 561 | d->pty_p = 1; |
| 562 | d->program = strdup (getenv ("SHELL")); |
| 563 | # ifdef DEBUG |
| 564 | fprintf (stderr, "%s: textclient: standalone: %s\n", |
| 565 | progname, d->program); |
| 566 | # endif |
| 567 | } |
| 568 | } |
| 569 | # endif |
| 570 | |
| 571 | start_timer (d); |
| 572 | |
| 573 | return d; |
| 574 | } |
| 575 | |
| 576 | |
| 577 | void |
| 578 | textclient_close (text_data *d) |
| 579 | { |
| 580 | # ifdef DEBUG |
| 581 | fprintf (stderr, "%s: textclient: free\n", progname); |
| 582 | # endif |
| 583 | |
| 584 | close_pipe (d); |
| 585 | if (d->program) |
| 586 | free (d->program); |
| 587 | if (d->pipe_timer) |
| 588 | XtRemoveTimeOut (d->pipe_timer); |
| 589 | d->pipe_timer = 0; |
| 590 | memset (d, 0, sizeof (*d)); |
| 591 | free (d); |
| 592 | } |
| 593 | |
| 594 | int |
| 595 | textclient_getc (text_data *d) |
| 596 | { |
| 597 | XtAppContext app = XtDisplayToApplicationContext (d->dpy); |
| 598 | int ret = -1; |
| 599 | |
| 600 | if (XtAppPending (app) & (XtIMTimer|XtIMAlternateInput)) |
| 601 | XtAppProcessEvent (app, XtIMTimer|XtIMAlternateInput); |
| 602 | |
| 603 | if (d->out_buffer && *d->out_buffer) |
| 604 | { |
| 605 | ret = *d->out_buffer; |
| 606 | d->out_buffer++; |
| 607 | } |
| 608 | else if (d->input_available_p && d->pipe) |
| 609 | { |
| 610 | unsigned char s[2]; |
| 611 | int n = read (fileno (d->pipe), (void *) s, 1); |
| 612 | if (n > 0) |
| 613 | ret = s[0]; |
| 614 | else /* EOF */ |
| 615 | { |
| 616 | if (d->pid) |
| 617 | { |
| 618 | # ifdef DEBUG |
| 619 | fprintf (stderr, "%s: textclient: waitpid %d\n", |
| 620 | progname, d->pid); |
| 621 | # endif |
| 622 | waitpid (d->pid, NULL, 0); |
| 623 | d->pid = 0; |
| 624 | } |
| 625 | |
| 626 | close_pipe (d); |
| 627 | |
| 628 | if (d->out_column > 0) |
| 629 | { |
| 630 | # ifdef DEBUG |
| 631 | fprintf (stderr, "%s: textclient: adding blank line at EOF\n", |
| 632 | progname); |
| 633 | # endif |
| 634 | d->out_buffer = "\r\n\r\n"; |
| 635 | } |
| 636 | |
| 637 | start_timer (d); |
| 638 | } |
| 639 | d->input_available_p = False; |
| 640 | } |
| 641 | |
| 642 | if (ret == '\r' || ret == '\n') |
| 643 | d->out_column = 0; |
| 644 | else if (ret > 0) |
| 645 | d->out_column++; |
| 646 | |
| 647 | # ifdef DEBUG |
| 648 | if (ret <= 0) |
| 649 | fprintf (stderr, "%s: textclient: getc: %d\n", progname, ret); |
| 650 | else if (ret < ' ') |
| 651 | fprintf (stderr, "%s: textclient: getc: %03o\n", progname, ret); |
| 652 | else |
| 653 | fprintf (stderr, "%s: textclient: getc: '%c'\n", progname, (char) ret); |
| 654 | # endif |
| 655 | |
| 656 | return ret; |
| 657 | } |
| 658 | |
| 659 | |
| 660 | /* The interpretation of the ModN modifiers is dependent on what keys |
| 661 | are bound to them: Mod1 does not necessarily mean "meta". It only |
| 662 | means "meta" if Meta_L or Meta_R are bound to it. If Meta_L is on |
| 663 | Mod5, then Mod5 is the one that means Meta. Oh, and Meta and Alt |
| 664 | aren't necessarily the same thing. Icepicks in my forehead! |
| 665 | */ |
| 666 | static unsigned int |
| 667 | do_icccm_meta_key_stupidity (Display *dpy) |
| 668 | { |
| 669 | unsigned int modbits = 0; |
| 670 | # ifndef HAVE_COCOA |
| 671 | int i, j, k; |
| 672 | XModifierKeymap *modmap = XGetModifierMapping (dpy); |
| 673 | for (i = 3; i < 8; i++) |
| 674 | for (j = 0; j < modmap->max_keypermod; j++) |
| 675 | { |
| 676 | int code = modmap->modifiermap[i * modmap->max_keypermod + j]; |
| 677 | KeySym *syms; |
| 678 | int nsyms = 0; |
| 679 | if (code == 0) continue; |
| 680 | syms = XGetKeyboardMapping (dpy, code, 1, &nsyms); |
| 681 | for (k = 0; k < nsyms; k++) |
| 682 | if (syms[k] == XK_Meta_L || syms[k] == XK_Meta_R || |
| 683 | syms[k] == XK_Alt_L || syms[k] == XK_Alt_R) |
| 684 | modbits |= (1 << i); |
| 685 | XFree (syms); |
| 686 | } |
| 687 | XFreeModifiermap (modmap); |
| 688 | # endif /* HAVE_COCOA */ |
| 689 | return modbits; |
| 690 | } |
| 691 | |
| 692 | |
| 693 | /* Returns a mask of the bit or bits of a KeyPress event that mean "meta". |
| 694 | */ |
| 695 | static unsigned int |
| 696 | meta_modifier (text_data *d) |
| 697 | { |
| 698 | if (!d->meta_done_once) |
| 699 | { |
| 700 | /* Really, we are supposed to recompute this if a KeymapNotify |
| 701 | event comes in, but fuck it. */ |
| 702 | d->meta_done_once = True; |
| 703 | d->meta_mask = do_icccm_meta_key_stupidity (d->dpy); |
| 704 | # ifdef DEBUG |
| 705 | fprintf (stderr, "%s: textclient: ICCCM Meta is 0x%08X\n", |
| 706 | progname, d->meta_mask); |
| 707 | # endif |
| 708 | } |
| 709 | return d->meta_mask; |
| 710 | } |
| 711 | |
| 712 | |
| 713 | Bool |
| 714 | textclient_putc (text_data *d, XKeyEvent *k) |
| 715 | { |
| 716 | KeySym keysym; |
| 717 | unsigned char c = 0; |
| 718 | XLookupString (k, (char *) &c, 1, &keysym, &d->compose); |
| 719 | if (c != 0 && d->pipe) |
| 720 | { |
| 721 | if (!d->swap_bs_del_p) ; |
| 722 | else if (c == 127) c = 8; |
| 723 | else if (c == 8) c = 127; |
| 724 | |
| 725 | /* If meta was held down, send ESC, or turn on the high bit. */ |
| 726 | if (k->state & meta_modifier (d)) |
| 727 | { |
| 728 | if (d->meta_sends_esc_p) |
| 729 | fputc ('\033', d->pipe); |
| 730 | else |
| 731 | c |= 0x80; |
| 732 | } |
| 733 | |
| 734 | fputc (c, d->pipe); |
| 735 | fflush (d->pipe); |
| 736 | k->type = 0; /* don't interpret this event defaultly. */ |
| 737 | |
| 738 | # ifdef DEBUG |
| 739 | fprintf (stderr, "%s: textclient: putc '%c'\n", progname, (char) c); |
| 740 | # endif |
| 741 | |
| 742 | return True; |
| 743 | } |
| 744 | return False; |
| 745 | } |
| 746 | |
| 747 | #endif /* !HAVE_IPHONE -- whole file */ |