| 1 | /* |
| 2 | * xcopy: quickly pipe text data into, or out of, the primary X |
| 3 | * selection |
| 4 | */ |
| 5 | |
| 6 | #include <stdio.h> |
| 7 | #include <stdlib.h> |
| 8 | #include <string.h> |
| 9 | #include <stdarg.h> |
| 10 | #include <math.h> |
| 11 | #include <errno.h> |
| 12 | #include <assert.h> |
| 13 | |
| 14 | #include <X11/X.h> |
| 15 | #include <X11/Xlib.h> |
| 16 | #include <X11/Xutil.h> |
| 17 | #include <X11/Xatom.h> |
| 18 | |
| 19 | int init_X(void); |
| 20 | void run_X(void); |
| 21 | void done_X(void); |
| 22 | void full_redraw(void); |
| 23 | void do_paste(Window window, Atom property, int Delete); |
| 24 | |
| 25 | char *pname; /* program name */ |
| 26 | |
| 27 | void error (char *fmt, ...); |
| 28 | |
| 29 | /* set from command-line parameters */ |
| 30 | char *display = NULL; |
| 31 | enum { STRING, CTEXT, UTF8 } mode = STRING; |
| 32 | |
| 33 | /* selection data */ |
| 34 | char *seltext; |
| 35 | int sellen, selsize; |
| 36 | #define SELDELTA 16384 |
| 37 | |
| 38 | /* functional parameters */ |
| 39 | int reading; /* read instead of writing? */ |
| 40 | int convert_to_ctext = True; /* Xmb convert to compound text? */ |
| 41 | |
| 42 | const char usagemsg[] = |
| 43 | "usage: xcopy [ -r ] [ -u | -c ] [ -C ]\n" |
| 44 | "where: -r read X selection and print on stdout\n" |
| 45 | " no -r read stdin and store in X selection\n" |
| 46 | " -u work with UTF8_STRING type selections\n" |
| 47 | " -c work with COMPOUND_TEXT type selections\n" |
| 48 | " -C suppress automatic conversion to COMPOUND_TEXT\n" |
| 49 | " also: xcopy --version report version number\n" |
| 50 | " xcopy --help display this help text\n" |
| 51 | " xcopy --licence display the (MIT) licence text\n" |
| 52 | ; |
| 53 | |
| 54 | void usage(void) { |
| 55 | fputs(usagemsg, stdout); |
| 56 | } |
| 57 | |
| 58 | const char licencemsg[] = |
| 59 | "xcopy is copyright 2001-2004 Simon Tatham.\n" |
| 60 | "\n" |
| 61 | "Permission is hereby granted, free of charge, to any person\n" |
| 62 | "obtaining a copy of this software and associated documentation files\n" |
| 63 | "(the \"Software\"), to deal in the Software without restriction,\n" |
| 64 | "including without limitation the rights to use, copy, modify, merge,\n" |
| 65 | "publish, distribute, sublicense, and/or sell copies of the Software,\n" |
| 66 | "and to permit persons to whom the Software is furnished to do so,\n" |
| 67 | "subject to the following conditions:\n" |
| 68 | "\n" |
| 69 | "The above copyright notice and this permission notice shall be\n" |
| 70 | "included in all copies or substantial portions of the Software.\n" |
| 71 | "\n" |
| 72 | "THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND,\n" |
| 73 | "EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\n" |
| 74 | "MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND\n" |
| 75 | "NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS\n" |
| 76 | "BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN\n" |
| 77 | "ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN\n" |
| 78 | "CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE\n" |
| 79 | "SOFTWARE.\n" |
| 80 | ; |
| 81 | |
| 82 | void licence(void) { |
| 83 | fputs(licencemsg, stdout); |
| 84 | } |
| 85 | |
| 86 | void version(void) { |
| 87 | #define SVN_REV "$Revision$" |
| 88 | char rev[sizeof(SVN_REV)]; |
| 89 | char *p, *q; |
| 90 | |
| 91 | strcpy(rev, SVN_REV); |
| 92 | |
| 93 | for (p = rev; *p && *p != ':'; p++); |
| 94 | if (*p) { |
| 95 | p++; |
| 96 | while (*p && isspace(*p)) p++; |
| 97 | for (q = p; *q && *q != '$'; q++); |
| 98 | if (*q) *q = '\0'; |
| 99 | printf("xcopy revision %s\n", p); |
| 100 | } else { |
| 101 | printf("xcopy: unknown version\n"); |
| 102 | } |
| 103 | } |
| 104 | |
| 105 | int main(int ac, char **av) { |
| 106 | int n; |
| 107 | int eventloop; |
| 108 | |
| 109 | pname = *av; |
| 110 | |
| 111 | /* parse the command line arguments */ |
| 112 | while (--ac) { |
| 113 | char *p = *++av; |
| 114 | |
| 115 | if (!strcmp(p, "-display") || !strcmp(p, "-disp")) { |
| 116 | if (!av[1]) |
| 117 | error ("option `%s' expects a parameter", p); |
| 118 | display = *++av, --ac; |
| 119 | } else if (!strcmp(p, "-r")) { |
| 120 | reading = True; |
| 121 | } else if (!strcmp(p, "-u")) { |
| 122 | mode = UTF8; |
| 123 | } else if (!strcmp(p, "-c")) { |
| 124 | mode = CTEXT; |
| 125 | } else if (!strcmp(p, "-C")) { |
| 126 | convert_to_ctext = False; |
| 127 | } else if (!strcmp(p, "--help")) { |
| 128 | usage(); |
| 129 | return 0; |
| 130 | } else if (!strcmp(p, "--version")) { |
| 131 | version(); |
| 132 | return 0; |
| 133 | } else if (!strcmp(p, "--licence") || !strcmp(p, "--license")) { |
| 134 | licence(); |
| 135 | return 0; |
| 136 | } else if (*p=='-') { |
| 137 | error ("unrecognised option `%s'", p); |
| 138 | } else { |
| 139 | error ("no parameters required"); |
| 140 | } |
| 141 | } |
| 142 | |
| 143 | if (!reading) { |
| 144 | seltext = malloc(SELDELTA); |
| 145 | if (!seltext) |
| 146 | error ("out of memory"); |
| 147 | selsize = SELDELTA; |
| 148 | sellen = 0; |
| 149 | do { |
| 150 | n = fread(seltext+sellen, 1, selsize-sellen, stdin); |
| 151 | sellen += n; |
| 152 | if (sellen >= selsize) { |
| 153 | seltext = realloc(seltext, selsize += SELDELTA); |
| 154 | if (!seltext) |
| 155 | error ("out of memory"); |
| 156 | } |
| 157 | } while (n > 0); |
| 158 | if (sellen == selsize) { |
| 159 | seltext = realloc(seltext, selsize += SELDELTA); |
| 160 | if (!seltext) |
| 161 | error ("out of memory"); |
| 162 | } |
| 163 | seltext[sellen] = '\0'; |
| 164 | } |
| 165 | |
| 166 | eventloop = init_X(); |
| 167 | if (!reading) { |
| 168 | /* |
| 169 | * If we are writing the selection, we must go into the |
| 170 | * background now. |
| 171 | */ |
| 172 | int pid = fork(); |
| 173 | if (pid < 0) { |
| 174 | error("unable to fork: %s", strerror(errno)); |
| 175 | } else if (pid > 0) { |
| 176 | /* |
| 177 | * we are the parent; just exit |
| 178 | */ |
| 179 | return 0; |
| 180 | } |
| 181 | /* |
| 182 | * we are the child |
| 183 | */ |
| 184 | close(0); |
| 185 | close(1); |
| 186 | close(2); |
| 187 | chdir("/"); |
| 188 | } |
| 189 | if (eventloop) |
| 190 | run_X(); |
| 191 | done_X(); |
| 192 | return 0; |
| 193 | } |
| 194 | |
| 195 | /* handle errors */ |
| 196 | |
| 197 | void error (char *fmt, ...) { |
| 198 | va_list ap; |
| 199 | char errbuf[200]; |
| 200 | |
| 201 | done_X(); |
| 202 | va_start (ap, fmt); |
| 203 | vsprintf (errbuf, fmt, ap); |
| 204 | va_end (ap); |
| 205 | fprintf (stderr, "%s: %s\n", pname, errbuf); |
| 206 | exit (1); |
| 207 | } |
| 208 | |
| 209 | /* begin the X interface */ |
| 210 | |
| 211 | char *lcasename = "xcopy"; |
| 212 | char *ucasename = "XCopy"; |
| 213 | |
| 214 | Display *disp = NULL; |
| 215 | Window ourwin = None; |
| 216 | Atom compound_text_atom, targets_atom; |
| 217 | int screen, wwidth, wheight; |
| 218 | |
| 219 | Atom strtype = XA_STRING; |
| 220 | |
| 221 | /* |
| 222 | * Returns TRUE if we need to enter an event loop, FALSE otherwise. |
| 223 | */ |
| 224 | int init_X(void) { |
| 225 | Window root; |
| 226 | int x = 0, y = 0, width = 512, height = 128; |
| 227 | int i, got = 0; |
| 228 | XWMHints wm_hints; |
| 229 | XSizeHints size_hints; |
| 230 | XClassHint class_hints; |
| 231 | XTextProperty textprop; |
| 232 | XGCValues gcv; |
| 233 | |
| 234 | /* open the X display */ |
| 235 | disp = XOpenDisplay (display); |
| 236 | if (!disp) |
| 237 | error ("unable to open display"); |
| 238 | |
| 239 | if (mode == UTF8) { |
| 240 | strtype = XInternAtom(disp, "UTF8_STRING", False); |
| 241 | if (!strtype) |
| 242 | error ("unable to get UTF8_STRING property"); |
| 243 | } else if (mode == CTEXT) { |
| 244 | strtype = XInternAtom(disp, "COMPOUND_TEXT", False); |
| 245 | if (!strtype) |
| 246 | error ("unable to get COMPOUND_TEXT property"); |
| 247 | } |
| 248 | targets_atom = XInternAtom(disp, "TARGETS", False); |
| 249 | if (!targets_atom) |
| 250 | error ("unable to get TARGETS property"); |
| 251 | |
| 252 | /* get the screen and root-window */ |
| 253 | screen = DefaultScreen (disp); |
| 254 | root = RootWindow (disp, screen); |
| 255 | |
| 256 | x = y = 0; |
| 257 | width = height = 10; /* doesn't really matter */ |
| 258 | |
| 259 | /* actually create the window */ |
| 260 | ourwin = XCreateSimpleWindow (disp, root, x, y, width, height,0, |
| 261 | BlackPixel(disp, screen), |
| 262 | WhitePixel(disp, screen)); |
| 263 | |
| 264 | /* resource class name */ |
| 265 | class_hints.res_name = lcasename; |
| 266 | class_hints.res_class = ucasename; |
| 267 | XSetClassHint (disp, ourwin, &class_hints); |
| 268 | |
| 269 | /* do selection fiddling */ |
| 270 | if (reading) { |
| 271 | /* |
| 272 | * We are reading the selection, so we must FIXME. |
| 273 | */ |
| 274 | if (XGetSelectionOwner(disp, XA_PRIMARY) == None) { |
| 275 | /* No primary selection, so use the cut buffer. */ |
| 276 | do_paste(DefaultRootWindow(disp), XA_CUT_BUFFER0, False); |
| 277 | return False; |
| 278 | } else { |
| 279 | Atom sel_property = XInternAtom(disp, "VT_SELECTION", False); |
| 280 | XConvertSelection(disp, XA_PRIMARY, strtype, |
| 281 | sel_property, ourwin, CurrentTime); |
| 282 | return True; |
| 283 | } |
| 284 | } else { |
| 285 | /* |
| 286 | * We are writing to the selection, so we establish |
| 287 | * ourselves as selection owner. Also place the data in |
| 288 | * CUT_BUFFER0, if it isn't of an exotic type (cut buffers |
| 289 | * can only take ordinary string data, it turns out). |
| 290 | */ |
| 291 | XSetSelectionOwner (disp, XA_PRIMARY, ourwin, CurrentTime); |
| 292 | if (XGetSelectionOwner (disp, XA_PRIMARY) != ourwin) |
| 293 | error ("unable to obtain primary X selection\n"); |
| 294 | compound_text_atom = XInternAtom(disp, "COMPOUND_TEXT", False); |
| 295 | if (strtype == XA_STRING) { |
| 296 | /* |
| 297 | * ICCCM-required cut buffer initialisation. |
| 298 | */ |
| 299 | XChangeProperty(disp, root, XA_CUT_BUFFER0, |
| 300 | XA_STRING, 8, PropModeAppend, "", 0); |
| 301 | XChangeProperty(disp, root, XA_CUT_BUFFER1, |
| 302 | XA_STRING, 8, PropModeAppend, "", 0); |
| 303 | XChangeProperty(disp, root, XA_CUT_BUFFER2, |
| 304 | XA_STRING, 8, PropModeAppend, "", 0); |
| 305 | XChangeProperty(disp, root, XA_CUT_BUFFER3, |
| 306 | XA_STRING, 8, PropModeAppend, "", 0); |
| 307 | XChangeProperty(disp, root, XA_CUT_BUFFER4, |
| 308 | XA_STRING, 8, PropModeAppend, "", 0); |
| 309 | XChangeProperty(disp, root, XA_CUT_BUFFER5, |
| 310 | XA_STRING, 8, PropModeAppend, "", 0); |
| 311 | XChangeProperty(disp, root, XA_CUT_BUFFER6, |
| 312 | XA_STRING, 8, PropModeAppend, "", 0); |
| 313 | XChangeProperty(disp, root, XA_CUT_BUFFER7, |
| 314 | XA_STRING, 8, PropModeAppend, "", 0); |
| 315 | /* |
| 316 | * Rotate the cut buffers and add our text in CUT_BUFFER0. |
| 317 | */ |
| 318 | XRotateBuffers(disp, 1); |
| 319 | XStoreBytes(disp, seltext, sellen); |
| 320 | } |
| 321 | return True; |
| 322 | } |
| 323 | } |
| 324 | |
| 325 | void run_X(void) { |
| 326 | XEvent ev, e2; |
| 327 | |
| 328 | while (1) { |
| 329 | XNextEvent (disp, &ev); |
| 330 | if (reading) { |
| 331 | switch (ev.type) { |
| 332 | case SelectionNotify: |
| 333 | if (ev.xselection.property != None) |
| 334 | do_paste(ev.xselection.requestor, |
| 335 | ev.xselection.property, True); |
| 336 | return; |
| 337 | } |
| 338 | } else { |
| 339 | switch (ev.type) { |
| 340 | case SelectionClear: |
| 341 | /* Selection has been cleared by another app. */ |
| 342 | return; |
| 343 | case SelectionRequest: |
| 344 | e2.xselection.type = SelectionNotify; |
| 345 | e2.xselection.requestor = ev.xselectionrequest.requestor; |
| 346 | e2.xselection.selection = ev.xselectionrequest.selection; |
| 347 | e2.xselection.target = ev.xselectionrequest.target; |
| 348 | e2.xselection.time = ev.xselectionrequest.time; |
| 349 | if (ev.xselectionrequest.target == strtype) { |
| 350 | XChangeProperty (disp, ev.xselectionrequest.requestor, |
| 351 | ev.xselectionrequest.property, strtype, |
| 352 | 8, PropModeReplace, seltext, sellen); |
| 353 | e2.xselection.property = ev.xselectionrequest.property; |
| 354 | } else if (ev.xselectionrequest.target == compound_text_atom && |
| 355 | convert_to_ctext) { |
| 356 | XTextProperty tp; |
| 357 | XmbTextListToTextProperty (disp, &seltext, 1, |
| 358 | XCompoundTextStyle, &tp); |
| 359 | XChangeProperty (disp, ev.xselectionrequest.requestor, |
| 360 | ev.xselectionrequest.property, |
| 361 | ev.xselectionrequest.target, |
| 362 | tp.format, PropModeReplace, |
| 363 | tp.value, tp.nitems); |
| 364 | e2.xselection.property = ev.xselectionrequest.property; |
| 365 | } else if (ev.xselectionrequest.target == targets_atom) { |
| 366 | Atom targets[2]; |
| 367 | int len = 0; |
| 368 | targets[len++] = strtype; |
| 369 | if (strtype != compound_text_atom && convert_to_ctext) |
| 370 | targets[len++] = compound_text_atom; |
| 371 | XChangeProperty (disp, ev.xselectionrequest.requestor, |
| 372 | ev.xselectionrequest.property, |
| 373 | ev.xselectionrequest.target, |
| 374 | 32, PropModeReplace, |
| 375 | (unsigned char *)targets, len); |
| 376 | } else { |
| 377 | e2.xselection.property = None; |
| 378 | } |
| 379 | XSendEvent (disp, ev.xselectionrequest.requestor, False, 0, &e2); |
| 380 | } |
| 381 | } |
| 382 | } |
| 383 | } |
| 384 | |
| 385 | void done_X(void) { |
| 386 | int i; |
| 387 | |
| 388 | if (ourwin != None) |
| 389 | XDestroyWindow (disp, ourwin); |
| 390 | if (disp) |
| 391 | XCloseDisplay (disp); |
| 392 | } |
| 393 | |
| 394 | void do_paste(Window window, Atom property, int Delete) { |
| 395 | Atom actual_type; |
| 396 | int actual_format, i; |
| 397 | long nitems, bytes_after, nread; |
| 398 | unsigned char *data; |
| 399 | |
| 400 | nread = 0; |
| 401 | while (XGetWindowProperty(disp, window, property, nread / 4, SELDELTA, |
| 402 | Delete, AnyPropertyType, &actual_type, |
| 403 | &actual_format, &nitems, &bytes_after, |
| 404 | (unsigned char **) &data) == Success) { |
| 405 | /* |
| 406 | * We expect all returned chunks of data to be multiples of |
| 407 | * 4 bytes (because we can only request the subsequent |
| 408 | * starting offset in 4-byte increments). Of course you can |
| 409 | * store an odd number of bytes in a selection, so this |
| 410 | * can't be the case every time XGetWindowProperty returns; |
| 411 | * but it should be the case every time it returns _and |
| 412 | * there is more data to come_. |
| 413 | * |
| 414 | * Hence, whenever XGetWindowProperty returns, we verify |
| 415 | * that the size of the data returned _last_ time was |
| 416 | * divisible by 4. |
| 417 | */ |
| 418 | if (nitems > 0) |
| 419 | assert((nread & 3) == 0); |
| 420 | |
| 421 | if (actual_type == strtype && nitems > 0) { |
| 422 | assert(actual_format == 8); |
| 423 | fwrite(data, 1, nitems, stdout); |
| 424 | nread += nitems; |
| 425 | } |
| 426 | XFree(data); |
| 427 | if (actual_type != strtype || nitems == 0) |
| 428 | break; |
| 429 | } |
| 430 | } |