Mercurial > vim
annotate src/if_xcmdsrv.c @ 31525:f7c82a85e88a v9.0.1095
patch 9.0.1095: using freed memory when declaration fails
Commit: https://github.com/vim/vim/commit/6ef5471afa69a654888bc285a51a6035405d33a0
Author: Bram Moolenaar <Bram@vim.org>
Date: Sun Dec 25 19:31:36 2022 +0000
patch 9.0.1095: using freed memory when declaration fails
Problem: Using freed memory when declaration fails. (Yegappan Lakshmanan)
Solution: After unreferencing an object set the reference to NULL.
| author | Bram Moolenaar <Bram@vim.org> |
|---|---|
| date | Sun, 25 Dec 2022 20:45:04 +0100 |
| parents | fa309d9af73c |
| children | 27c9212d10aa |
| rev | line source |
|---|---|
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1 /* vi:set ts=8 sts=4 sw=4 noet: |
| 7 | 2 * |
| 3 * VIM - Vi IMproved by Bram Moolenaar | |
| 4 * X command server by Flemming Madsen | |
| 5 * | |
| 6 * Do ":help uganda" in Vim to read copying and usage conditions. | |
| 7 * Do ":help credits" in Vim to see a list of people who contributed. | |
| 8 * See README.txt for an overview of the Vim source code. | |
| 9 * | |
| 10 * if_xcmdsrv.c: Functions for passing commands through an X11 display. | |
| 11 * | |
| 12 */ | |
| 13 | |
| 14 #include "vim.h" | |
| 15 #include "version.h" | |
| 16 | |
| 17 #if defined(FEAT_CLIENTSERVER) || defined(PROTO) | |
| 18 | |
| 19 # ifdef FEAT_X11 | |
| 20 # include <X11/Intrinsic.h> | |
| 21 # include <X11/Xatom.h> | |
| 22 # endif | |
| 23 | |
| 24 /* | |
| 1121 | 25 * This file provides procedures that implement the command server |
| 26 * functionality of Vim when in contact with an X11 server. | |
| 7 | 27 * |
| 28 * Adapted from TCL/TK's send command in tkSend.c of the tk 3.6 distribution. | |
| 29 * Adapted for use in Vim by Flemming Madsen. Protocol changed to that of tk 4 | |
| 30 */ | |
| 31 | |
| 32 /* | |
| 33 * Copyright (c) 1989-1993 The Regents of the University of California. | |
| 34 * All rights reserved. | |
| 35 * | |
| 36 * Permission is hereby granted, without written agreement and without | |
| 37 * license or royalty fees, to use, copy, modify, and distribute this | |
| 38 * software and its documentation for any purpose, provided that the | |
| 39 * above copyright notice and the following two paragraphs appear in | |
| 40 * all copies of this software. | |
| 41 * | |
| 42 * IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR | |
| 43 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT | |
| 44 * OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE UNIVERSITY OF | |
| 45 * CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 46 * | |
| 47 * THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES, | |
| 48 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY | |
| 49 * AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS | |
| 50 * ON AN "AS IS" BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATION TO | |
| 51 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. | |
| 52 */ | |
| 53 | |
| 54 | |
| 55 /* | |
| 56 * When a result is being awaited from a sent command, one of | |
| 57 * the following structures is present on a list of all outstanding | |
| 58 * sent commands. The information in the structure is used to | |
| 59 * process the result when it arrives. You're probably wondering | |
| 60 * how there could ever be multiple outstanding sent commands. | |
| 61 * This could happen if Vim instances invoke each other recursively. | |
| 62 * It's unlikely, but possible. | |
| 63 */ | |
| 64 | |
| 65 typedef struct PendingCommand | |
| 66 { | |
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67 int serial; // Serial number expected in result. |
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68 int code; // Result Code. 0 is OK |
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69 char_u *result; // String result for command (malloc'ed). |
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70 // NULL means command still pending. |
| 7 | 71 struct PendingCommand *nextPtr; |
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72 // Next in list of all outstanding commands. |
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73 // NULL means end of list. |
| 7 | 74 } PendingCommand; |
| 75 | |
| 76 static PendingCommand *pendingCommands = NULL; | |
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77 // List of all commands currently |
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78 // being waited for. |
| 7 | 79 |
| 80 /* | |
| 81 * The information below is used for communication between processes | |
| 82 * during "send" commands. Each process keeps a private window, never | |
| 83 * even mapped, with one property, "Comm". When a command is sent to | |
| 84 * an interpreter, the command is appended to the comm property of the | |
| 85 * communication window associated with the interp's process. Similarly, | |
| 86 * when a result is returned from a sent command, it is also appended | |
| 87 * to the comm property. | |
| 88 * | |
| 89 * Each command and each result takes the form of ASCII text. For a | |
| 90 * command, the text consists of a nul character followed by several | |
| 39 | 91 * nul-terminated ASCII strings. The first string consists of a |
| 92 * single letter: | |
| 93 * "c" for an expression | |
| 94 * "k" for keystrokes | |
| 95 * "r" for reply | |
| 96 * "n" for notification. | |
| 97 * Subsequent strings have the form "option value" where the following options | |
| 98 * are supported: | |
| 7 | 99 * |
| 100 * -r commWindow serial | |
| 101 * | |
| 102 * This option means that a response should be sent to the window | |
| 103 * whose X identifier is "commWindow" (in hex), and the response should | |
| 104 * be identified with the serial number given by "serial" (in decimal). | |
| 105 * If this option isn't specified then the send is asynchronous and | |
| 106 * no response is sent. | |
| 107 * | |
| 108 * -n name | |
| 109 * "Name" gives the name of the application for which the command is | |
| 110 * intended. This option must be present. | |
| 111 * | |
| 39 | 112 * -E encoding |
| 113 * Encoding name used for the text. This is the 'encoding' of the | |
| 114 * sender. The receiver may want to do conversion to his 'encoding'. | |
| 115 * | |
| 7 | 116 * -s script |
| 117 * "Script" is the script to be executed. This option must be | |
| 118 * present. Taken as a series of keystrokes in a "k" command where | |
| 119 * <Key>'s are expanded | |
| 120 * | |
| 121 * The options may appear in any order. The -n and -s options must be | |
| 122 * present, but -r may be omitted for asynchronous RPCs. For compatibility | |
| 123 * with future releases that may add new features, there may be additional | |
| 124 * options present; as long as they start with a "-" character, they will | |
| 125 * be ignored. | |
| 126 * | |
| 127 * A result also consists of a zero character followed by several null- | |
| 128 * terminated ASCII strings. The first string consists of the single | |
| 129 * letter "r". Subsequent strings have the form "option value" where | |
| 130 * the following options are supported: | |
| 131 * | |
| 132 * -s serial | |
| 133 * Identifies the command for which this is the result. It is the | |
| 134 * same as the "serial" field from the -s option in the command. This | |
| 135 * option must be present. | |
| 136 * | |
| 137 * -r result | |
| 138 * "Result" is the result string for the script, which may be either | |
| 139 * a result or an error message. If this field is omitted then it | |
| 140 * defaults to an empty string. | |
| 141 * | |
| 142 * -c code | |
| 143 * 0: for OK. This is the default. | |
| 144 * 1: for error: Result is the last error | |
| 145 * | |
| 146 * -i errorInfo | |
| 147 * -e errorCode | |
| 148 * Not applicable for Vim | |
| 149 * | |
| 150 * Options may appear in any order, and only the -s option must be | |
| 151 * present. As with commands, there may be additional options besides | |
| 152 * these; unknown options are ignored. | |
| 153 */ | |
| 154 | |
| 155 /* | |
| 156 * Maximum size property that can be read at one time by | |
| 157 * this module: | |
| 158 */ | |
| 159 | |
| 160 #define MAX_PROP_WORDS 100000 | |
| 161 | |
| 162 struct ServerReply | |
| 163 { | |
| 164 Window id; | |
| 165 garray_T strings; | |
| 166 }; | |
| 167 static garray_T serverReply = { 0, 0, 0, 0, 0 }; | |
| 168 enum ServerReplyOp { SROP_Find, SROP_Add, SROP_Delete }; | |
| 169 | |
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170 typedef int (*EndCond)(void *); |
| 7 | 171 |
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172 struct x_cmdqueue |
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173 { |
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174 char_u *propInfo; |
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175 long_u len; |
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176 struct x_cmdqueue *next; |
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177 struct x_cmdqueue *prev; |
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178 }; |
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179 |
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180 typedef struct x_cmdqueue x_queue_T; |
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181 |
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182 // dummy node, header for circular queue |
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183 static x_queue_T head = {NULL, 0, NULL, NULL}; |
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184 |
| 7 | 185 /* |
| 186 * Forward declarations for procedures defined later in this file: | |
| 187 */ | |
| 188 | |
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189 static Window LookupName(Display *dpy, char_u *name, int delete, char_u **loose); |
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190 static int SendInit(Display *dpy); |
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191 static int DoRegisterName(Display *dpy, char_u *name); |
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192 static void DeleteAnyLingerer(Display *dpy, Window w); |
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193 static int GetRegProp(Display *dpy, char_u **regPropp, long_u *numItemsp, int domsg); |
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194 static int WaitForPend(void *p); |
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195 static int WindowValid(Display *dpy, Window w); |
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196 static void ServerWait(Display *dpy, Window w, EndCond endCond, void *endData, int localLoop, int seconds); |
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197 static int AppendPropCarefully(Display *display, Window window, Atom property, char_u *value, int length); |
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198 static int x_error_check(Display *dpy, XErrorEvent *error_event); |
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199 static int IsSerialName(char_u *name); |
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200 static void save_in_queue(char_u *buf, long_u len); |
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201 static void server_parse_message(Display *dpy, char_u *propInfo, long_u numItems); |
| 7 | 202 |
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203 // Private variables for the "server" functionality |
| 7 | 204 static Atom registryProperty = None; |
| 205 static Atom vimProperty = None; | |
| 206 static int got_x_error = FALSE; | |
| 207 | |
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208 static char_u *empty_prop = (char_u *)""; // empty GetRegProp() result |
| 7 | 209 |
| 210 /* | |
| 211 * Associate an ASCII name with Vim. Try real hard to get a unique one. | |
| 212 * Returns FAIL or OK. | |
| 213 */ | |
| 214 int | |
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215 serverRegisterName( |
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216 Display *dpy, // display to register with |
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217 char_u *name) // the name that will be used as a base |
| 7 | 218 { |
| 219 int i; | |
| 220 int res; | |
| 221 char_u *p = NULL; | |
| 222 | |
| 223 res = DoRegisterName(dpy, name); | |
| 224 if (res < 0) | |
| 225 { | |
| 226 i = 1; | |
| 227 do | |
| 228 { | |
| 229 if (res < -1 || i >= 1000) | |
| 230 { | |
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231 msg_attr(_("Unable to register a command server name"), |
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232 HL_ATTR(HLF_W)); |
| 7 | 233 return FAIL; |
| 234 } | |
| 235 if (p == NULL) | |
| 236 p = alloc(STRLEN(name) + 10); | |
| 237 if (p == NULL) | |
| 238 { | |
| 239 res = -10; | |
| 240 continue; | |
| 241 } | |
| 242 sprintf((char *)p, "%s%d", name, i++); | |
| 243 res = DoRegisterName(dpy, p); | |
| 244 } | |
| 245 while (res < 0) | |
| 246 ; | |
| 247 vim_free(p); | |
| 248 } | |
| 249 return OK; | |
| 250 } | |
| 251 | |
| 252 static int | |
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253 DoRegisterName(Display *dpy, char_u *name) |
| 7 | 254 { |
| 255 Window w; | |
| 256 XErrorHandler old_handler; | |
| 257 #define MAX_NAME_LENGTH 100 | |
| 258 char_u propInfo[MAX_NAME_LENGTH + 20]; | |
| 259 | |
| 260 if (commProperty == None) | |
| 261 { | |
| 262 if (SendInit(dpy) < 0) | |
| 263 return -2; | |
| 264 } | |
| 265 | |
| 266 /* | |
| 267 * Make sure the name is unique, and append info about it to | |
| 268 * the registry property. It's important to lock the server | |
| 269 * here to prevent conflicting changes to the registry property. | |
| 270 * WARNING: Do not step through this while debugging, it will hangup the X | |
| 271 * server! | |
| 272 */ | |
| 273 XGrabServer(dpy); | |
| 274 w = LookupName(dpy, name, FALSE, NULL); | |
| 275 if (w != (Window)0) | |
| 276 { | |
| 277 Status status; | |
| 278 int dummyInt; | |
| 279 unsigned int dummyUns; | |
| 280 Window dummyWin; | |
| 281 | |
| 282 /* | |
| 283 * The name is currently registered. See if the commWindow | |
| 284 * associated with the name exists. If not, or if the commWindow | |
| 285 * is *our* commWindow, then just unregister the old name (this | |
| 286 * could happen if an application dies without cleaning up the | |
| 287 * registry). | |
| 288 */ | |
| 289 old_handler = XSetErrorHandler(x_error_check); | |
| 290 status = XGetGeometry(dpy, w, &dummyWin, &dummyInt, &dummyInt, | |
| 291 &dummyUns, &dummyUns, &dummyUns, &dummyUns); | |
| 292 (void)XSetErrorHandler(old_handler); | |
| 293 if (status != Success && w != commWindow) | |
| 294 { | |
| 295 XUngrabServer(dpy); | |
| 296 XFlush(dpy); | |
| 297 return -1; | |
| 298 } | |
| 299 (void)LookupName(dpy, name, /*delete=*/TRUE, NULL); | |
| 300 } | |
| 301 sprintf((char *)propInfo, "%x %.*s", (int_u)commWindow, | |
| 302 MAX_NAME_LENGTH, name); | |
| 303 old_handler = XSetErrorHandler(x_error_check); | |
| 304 got_x_error = FALSE; | |
| 305 XChangeProperty(dpy, RootWindow(dpy, 0), registryProperty, XA_STRING, 8, | |
| 306 PropModeAppend, propInfo, STRLEN(propInfo) + 1); | |
| 307 XUngrabServer(dpy); | |
| 308 XSync(dpy, False); | |
| 309 (void)XSetErrorHandler(old_handler); | |
| 310 | |
| 311 if (!got_x_error) | |
| 312 { | |
| 313 #ifdef FEAT_EVAL | |
| 314 set_vim_var_string(VV_SEND_SERVER, name, -1); | |
| 315 #endif | |
| 316 serverName = vim_strsave(name); | |
| 317 need_maketitle = TRUE; | |
| 318 return 0; | |
| 319 } | |
| 320 return -2; | |
| 321 } | |
| 322 | |
| 323 #if defined(FEAT_GUI) || defined(PROTO) | |
| 324 /* | |
| 325 * Clean out new ID from registry and set it as comm win. | |
| 326 * Change any registered window ID. | |
| 327 */ | |
| 328 void | |
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329 serverChangeRegisteredWindow( |
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330 Display *dpy, // Display to register with |
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331 Window newwin) // Re-register to this ID |
| 7 | 332 { |
| 333 char_u propInfo[MAX_NAME_LENGTH + 20]; | |
| 334 | |
| 335 commWindow = newwin; | |
| 336 | |
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337 // Always call SendInit() here, to make sure commWindow is marked as a Vim |
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338 // window. |
| 7 | 339 if (SendInit(dpy) < 0) |
| 340 return; | |
| 341 | |
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342 // WARNING: Do not step through this while debugging, it will hangup the X |
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343 // server! |
| 7 | 344 XGrabServer(dpy); |
| 345 DeleteAnyLingerer(dpy, newwin); | |
| 346 if (serverName != NULL) | |
| 347 { | |
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348 // Reinsert name if it was already registered |
| 7 | 349 (void)LookupName(dpy, serverName, /*delete=*/TRUE, NULL); |
| 350 sprintf((char *)propInfo, "%x %.*s", | |
| 351 (int_u)newwin, MAX_NAME_LENGTH, serverName); | |
| 352 XChangeProperty(dpy, RootWindow(dpy, 0), registryProperty, XA_STRING, 8, | |
| 353 PropModeAppend, (char_u *)propInfo, | |
| 354 STRLEN(propInfo) + 1); | |
| 355 } | |
| 356 XUngrabServer(dpy); | |
| 357 } | |
| 358 #endif | |
| 359 | |
| 360 /* | |
| 361 * Send to an instance of Vim via the X display. | |
| 362 * Returns 0 for OK, negative for an error. | |
| 363 */ | |
| 364 int | |
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365 serverSendToVim( |
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366 Display *dpy, // Where to send. |
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367 char_u *name, // Where to send. |
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368 char_u *cmd, // What to send. |
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369 char_u **result, // Result of eval'ed expression |
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370 Window *server, // Actual ID of receiving app |
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371 Bool asExpr, // Interpret as keystrokes or expr ? |
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372 int timeout, // seconds to wait or zero |
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373 Bool localLoop, // Throw away everything but result |
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374 int silent) // don't complain about no server |
| 7 | 375 { |
| 376 Window w; | |
| 377 char_u *property; | |
| 378 int length; | |
| 379 int res; | |
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380 static int serial = 0; // Running count of sent commands. |
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381 // Used to give each command a |
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382 // different serial number. |
| 7 | 383 PendingCommand pending; |
| 384 char_u *loosename = NULL; | |
| 385 | |
| 386 if (result != NULL) | |
| 387 *result = NULL; | |
| 388 if (name == NULL || *name == NUL) | |
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389 name = (char_u *)"GVIM"; // use a default name |
| 7 | 390 |
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391 if (commProperty == None && dpy != NULL && SendInit(dpy) < 0) |
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392 return -1; |
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393 |
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394 #if defined(FEAT_EVAL) |
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395 ch_log(NULL, "serverSendToVim(%s, %s)", name, cmd); |
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396 #endif |
| 7 | 397 |
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398 // Execute locally if no display or target is ourselves |
| 7 | 399 if (dpy == NULL || (serverName != NULL && STRICMP(name, serverName) == 0)) |
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400 return sendToLocalVim(cmd, asExpr, result); |
| 7 | 401 |
| 402 /* | |
| 403 * Bind the server name to a communication window. | |
| 404 * | |
| 405 * Find any survivor with a serialno attached to the name if the | |
| 406 * original registrant of the wanted name is no longer present. | |
| 407 * | |
| 408 * Delete any lingering names from dead editors. | |
| 409 */ | |
| 410 while (TRUE) | |
| 411 { | |
| 412 w = LookupName(dpy, name, FALSE, &loosename); | |
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413 // Check that the window is hot |
| 7 | 414 if (w != None) |
| 415 { | |
| 416 if (!WindowValid(dpy, w)) | |
| 417 { | |
| 418 LookupName(dpy, loosename ? loosename : name, | |
| 419 /*DELETE=*/TRUE, NULL); | |
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420 vim_free(loosename); |
| 7 | 421 continue; |
| 422 } | |
| 423 } | |
| 424 break; | |
| 425 } | |
| 426 if (w == None) | |
| 427 { | |
| 428 if (!silent) | |
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429 semsg(_(e_no_registered_server_named_str), name); |
| 7 | 430 return -1; |
| 431 } | |
| 432 else if (loosename != NULL) | |
| 433 name = loosename; | |
| 434 if (server != NULL) | |
| 435 *server = w; | |
| 436 | |
| 437 /* | |
| 438 * Send the command to target interpreter by appending it to the | |
| 439 * comm window in the communication window. | |
| 500 | 440 * Length must be computed exactly! |
| 7 | 441 */ |
| 500 | 442 length = STRLEN(name) + STRLEN(p_enc) + STRLEN(cmd) + 14; |
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443 property = alloc(length + 30); |
| 7 | 444 |
| 39 | 445 sprintf((char *)property, "%c%c%c-n %s%c-E %s%c-s %s", |
| 446 0, asExpr ? 'c' : 'k', 0, name, 0, p_enc, 0, cmd); | |
| 7 | 447 if (name == loosename) |
| 448 vim_free(loosename); | |
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449 // Add a back reference to our comm window |
| 7 | 450 serial++; |
| 451 sprintf((char *)property + length, "%c-r %x %d", | |
| 452 0, (int_u)commWindow, serial); | |
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453 // Add length of what "-r %x %d" resulted in, skipping the NUL. |
| 7 | 454 length += STRLEN(property + length + 1) + 1; |
| 455 | |
| 456 res = AppendPropCarefully(dpy, w, commProperty, property, length + 1); | |
| 457 vim_free(property); | |
| 458 if (res < 0) | |
| 459 { | |
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460 emsg(_(e_failed_to_send_command_to_destination_program)); |
| 7 | 461 return -1; |
| 462 } | |
| 463 | |
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464 if (!asExpr) // There is no answer for this - Keys are sent async |
| 7 | 465 return 0; |
| 466 | |
| 467 /* | |
| 468 * Register the fact that we're waiting for a command to | |
| 469 * complete (this is needed by SendEventProc and by | |
| 470 * AppendErrorProc to pass back the command's results). | |
| 471 */ | |
| 472 pending.serial = serial; | |
| 473 pending.code = 0; | |
| 474 pending.result = NULL; | |
| 475 pending.nextPtr = pendingCommands; | |
| 476 pendingCommands = &pending; | |
| 477 | |
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478 ServerWait(dpy, w, WaitForPend, &pending, localLoop, |
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479 timeout > 0 ? timeout : 600); |
| 7 | 480 |
| 481 /* | |
| 482 * Unregister the information about the pending command | |
| 483 * and return the result. | |
| 484 */ | |
| 485 if (pendingCommands == &pending) | |
| 486 pendingCommands = pending.nextPtr; | |
| 487 else | |
| 488 { | |
| 489 PendingCommand *pcPtr; | |
| 490 | |
| 491 for (pcPtr = pendingCommands; pcPtr != NULL; pcPtr = pcPtr->nextPtr) | |
| 492 if (pcPtr->nextPtr == &pending) | |
| 493 { | |
| 494 pcPtr->nextPtr = pending.nextPtr; | |
| 495 break; | |
| 496 } | |
| 497 } | |
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498 |
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499 #if defined(FEAT_EVAL) |
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500 ch_log(NULL, "serverSendToVim() result: %s", |
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501 pending.result == NULL ? "NULL" : (char *)pending.result); |
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502 #endif |
| 7 | 503 if (result != NULL) |
| 504 *result = pending.result; | |
| 505 else | |
| 506 vim_free(pending.result); | |
| 507 | |
| 508 return pending.code == 0 ? 0 : -1; | |
| 509 } | |
| 510 | |
| 511 static int | |
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512 WaitForPend(void *p) |
| 7 | 513 { |
| 514 PendingCommand *pending = (PendingCommand *) p; | |
| 515 return pending->result != NULL; | |
| 516 } | |
| 517 | |
| 518 /* | |
| 519 * Return TRUE if window "w" exists and has a "Vim" property on it. | |
| 520 */ | |
| 521 static int | |
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522 WindowValid(Display *dpy, Window w) |
| 7 | 523 { |
| 524 XErrorHandler old_handler; | |
| 525 Atom *plist; | |
| 526 int numProp; | |
| 527 int i; | |
| 528 | |
| 529 old_handler = XSetErrorHandler(x_error_check); | |
| 530 got_x_error = 0; | |
| 531 plist = XListProperties(dpy, w, &numProp); | |
| 532 XSync(dpy, False); | |
| 533 XSetErrorHandler(old_handler); | |
| 534 if (plist == NULL || got_x_error) | |
| 535 return FALSE; | |
| 536 | |
| 537 for (i = 0; i < numProp; i++) | |
| 538 if (plist[i] == vimProperty) | |
| 539 { | |
| 540 XFree(plist); | |
| 541 return TRUE; | |
| 542 } | |
| 543 XFree(plist); | |
| 544 return FALSE; | |
| 545 } | |
| 546 | |
| 547 /* | |
| 548 * Enter a loop processing X events & polling chars until we see a result | |
| 549 */ | |
| 550 static void | |
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551 ServerWait( |
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552 Display *dpy, |
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553 Window w, |
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554 EndCond endCond, |
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555 void *endData, |
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556 int localLoop, |
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557 int seconds) |
| 7 | 558 { |
| 559 time_t start; | |
| 560 time_t now; | |
| 561 XEvent event; | |
| 3670 | 562 |
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563 #define UI_MSEC_DELAY 53 |
| 3670 | 564 #define SEND_MSEC_POLL 500 |
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565 #ifdef HAVE_SELECT |
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566 fd_set fds; |
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567 |
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568 FD_ZERO(&fds); |
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569 FD_SET(ConnectionNumber(dpy), &fds); |
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570 #else |
| 3670 | 571 struct pollfd fds; |
| 572 | |
| 573 fds.fd = ConnectionNumber(dpy); | |
| 574 fds.events = POLLIN; | |
| 575 #endif | |
| 7 | 576 |
| 577 time(&start); | |
| 3670 | 578 while (TRUE) |
| 7 | 579 { |
| 3670 | 580 while (XCheckWindowEvent(dpy, commWindow, PropertyChangeMask, &event)) |
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581 serverEventProc(dpy, &event, 1); |
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582 server_parse_messages(); |
| 3670 | 583 |
| 584 if (endCond(endData) != 0) | |
| 585 break; | |
| 586 if (!WindowValid(dpy, w)) | |
| 587 break; | |
| 7 | 588 time(&now); |
| 589 if (seconds >= 0 && (now - start) >= seconds) | |
| 590 break; | |
| 3670 | 591 |
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592 #ifdef FEAT_TIMERS |
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593 check_due_timer(); |
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594 #endif |
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595 |
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596 // Just look out for the answer without calling back into Vim |
| 7 | 597 if (localLoop) |
| 598 { | |
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599 #ifdef HAVE_SELECT |
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600 struct timeval tv; |
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601 |
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602 // Set the time every call, select() may change it to the remaining |
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603 // time. |
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604 tv.tv_sec = 0; |
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605 tv.tv_usec = SEND_MSEC_POLL * 1000; |
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606 if (select(FD_SETSIZE, &fds, NULL, NULL, &tv) < 0) |
| 7 | 607 break; |
| 608 #else | |
|
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609 if (poll(&fds, 1, SEND_MSEC_POLL) < 0) |
| 7 | 610 break; |
| 611 #endif | |
| 612 } | |
| 613 else | |
| 614 { | |
| 615 if (got_int) | |
| 616 break; | |
| 3670 | 617 ui_delay((long)UI_MSEC_DELAY, TRUE); |
| 7 | 618 ui_breakcheck(); |
| 619 } | |
| 620 } | |
| 621 } | |
| 622 | |
| 623 | |
| 624 /* | |
| 625 * Fetch a list of all the Vim instance names currently registered for the | |
| 626 * display. | |
| 627 * | |
| 628 * Returns a newline separated list in allocated memory or NULL. | |
| 629 */ | |
| 630 char_u * | |
|
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631 serverGetVimNames(Display *dpy) |
| 7 | 632 { |
| 633 char_u *regProp; | |
| 634 char_u *entry; | |
| 635 char_u *p; | |
| 636 long_u numItems; | |
| 637 int_u w; | |
| 638 garray_T ga; | |
| 639 | |
| 640 if (registryProperty == None) | |
| 641 { | |
| 642 if (SendInit(dpy) < 0) | |
| 643 return NULL; | |
| 644 } | |
| 645 | |
| 646 /* | |
| 647 * Read the registry property. | |
| 648 */ | |
| 649 if (GetRegProp(dpy, ®Prop, &numItems, TRUE) == FAIL) | |
| 650 return NULL; | |
| 651 | |
| 652 /* | |
| 653 * Scan all of the names out of the property. | |
| 654 */ | |
| 655 ga_init2(&ga, 1, 100); | |
| 1880 | 656 for (p = regProp; (long_u)(p - regProp) < numItems; p++) |
| 7 | 657 { |
| 658 entry = p; | |
| 659 while (*p != 0 && !isspace(*p)) | |
| 660 p++; | |
| 661 if (*p != 0) | |
| 662 { | |
| 663 w = None; | |
| 664 sscanf((char *)entry, "%x", &w); | |
| 665 if (WindowValid(dpy, (Window)w)) | |
| 666 { | |
| 667 ga_concat(&ga, p + 1); | |
| 668 ga_concat(&ga, (char_u *)"\n"); | |
| 669 } | |
| 670 while (*p != 0) | |
| 671 p++; | |
| 672 } | |
| 673 } | |
| 674 if (regProp != empty_prop) | |
| 675 XFree(regProp); | |
| 21 | 676 ga_append(&ga, NUL); |
| 7 | 677 return ga.ga_data; |
| 678 } | |
| 679 | |
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680 ///////////////////////////////////////////////////////////// |
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681 // Reply stuff |
| 7 | 682 |
| 683 static struct ServerReply * | |
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684 ServerReplyFind(Window w, enum ServerReplyOp op) |
| 7 | 685 { |
| 686 struct ServerReply *p; | |
| 687 struct ServerReply e; | |
| 688 int i; | |
| 689 | |
| 690 p = (struct ServerReply *) serverReply.ga_data; | |
| 691 for (i = 0; i < serverReply.ga_len; i++, p++) | |
| 692 if (p->id == w) | |
| 693 break; | |
| 694 if (i >= serverReply.ga_len) | |
| 695 p = NULL; | |
| 696 | |
| 697 if (p == NULL && op == SROP_Add) | |
| 698 { | |
| 699 if (serverReply.ga_growsize == 0) | |
| 700 ga_init2(&serverReply, sizeof(struct ServerReply), 1); | |
| 701 if (ga_grow(&serverReply, 1) == OK) | |
| 702 { | |
| 703 p = ((struct ServerReply *) serverReply.ga_data) | |
| 704 + serverReply.ga_len; | |
| 705 e.id = w; | |
| 706 ga_init2(&e.strings, 1, 100); | |
| 1740 | 707 mch_memmove(p, &e, sizeof(e)); |
| 7 | 708 serverReply.ga_len++; |
| 709 } | |
| 710 } | |
| 711 else if (p != NULL && op == SROP_Delete) | |
| 712 { | |
| 713 ga_clear(&p->strings); | |
| 714 mch_memmove(p, p + 1, (serverReply.ga_len - i - 1) * sizeof(*p)); | |
| 715 serverReply.ga_len--; | |
| 716 } | |
| 717 | |
| 718 return p; | |
| 719 } | |
| 720 | |
| 721 /* | |
| 722 * Convert string to windowid. | |
| 723 * Issue an error if the id is invalid. | |
| 724 */ | |
| 725 Window | |
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726 serverStrToWin(char_u *str) |
| 7 | 727 { |
| 728 unsigned id = None; | |
| 729 | |
| 730 sscanf((char *)str, "0x%x", &id); | |
| 731 if (id == None) | |
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732 semsg(_(e_invalid_server_id_used_str), str); |
| 7 | 733 |
| 734 return (Window)id; | |
| 735 } | |
| 736 | |
| 737 /* | |
| 39 | 738 * Send a reply string (notification) to client with id "name". |
| 7 | 739 * Return -1 if the window is invalid. |
| 740 */ | |
| 741 int | |
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742 serverSendReply(char_u *name, char_u *str) |
| 7 | 743 { |
| 744 char_u *property; | |
| 745 int length; | |
| 746 int res; | |
| 747 Display *dpy = X_DISPLAY; | |
| 748 Window win = serverStrToWin(name); | |
| 749 | |
| 750 if (commProperty == None) | |
| 751 { | |
| 752 if (SendInit(dpy) < 0) | |
| 753 return -2; | |
| 754 } | |
| 755 if (!WindowValid(dpy, win)) | |
| 756 return -1; | |
| 757 | |
| 500 | 758 length = STRLEN(p_enc) + STRLEN(str) + 14; |
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759 if ((property = alloc(length + 30)) != NULL) |
| 7 | 760 { |
| 39 | 761 sprintf((char *)property, "%cn%c-E %s%c-n %s%c-w %x", |
| 762 0, 0, p_enc, 0, str, 0, (unsigned int)commWindow); | |
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763 // Add length of what "%x" resulted in. |
| 7 | 764 length += STRLEN(property + length); |
| 765 res = AppendPropCarefully(dpy, win, commProperty, property, length + 1); | |
| 766 vim_free(property); | |
| 767 return res; | |
| 768 } | |
| 769 return -1; | |
| 770 } | |
| 771 | |
| 772 static int | |
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773 WaitForReply(void *p) |
| 7 | 774 { |
| 775 Window *w = (Window *) p; | |
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776 |
| 7 | 777 return ServerReplyFind(*w, SROP_Find) != NULL; |
| 778 } | |
| 779 | |
| 780 /* | |
| 781 * Wait for replies from id (win) | |
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782 * When "timeout" is non-zero wait up to this many seconds. |
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783 * Return 0 and the allocated string in "*str" when a reply is available. |
| 7 | 784 * Return -1 if the window becomes invalid while waiting. |
| 785 */ | |
| 786 int | |
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787 serverReadReply( |
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788 Display *dpy, |
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789 Window win, |
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790 char_u **str, |
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791 int localLoop, |
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792 int timeout) |
| 7 | 793 { |
| 794 int len; | |
| 795 char_u *s; | |
| 796 struct ServerReply *p; | |
| 797 | |
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798 ServerWait(dpy, win, WaitForReply, &win, localLoop, |
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799 timeout > 0 ? timeout : -1); |
| 7 | 800 |
| 801 if ((p = ServerReplyFind(win, SROP_Find)) != NULL && p->strings.ga_len > 0) | |
| 802 { | |
| 803 *str = vim_strsave(p->strings.ga_data); | |
| 804 len = STRLEN(*str) + 1; | |
| 805 if (len < p->strings.ga_len) | |
| 806 { | |
| 807 s = (char_u *) p->strings.ga_data; | |
| 808 mch_memmove(s, s + len, p->strings.ga_len - len); | |
| 809 p->strings.ga_len -= len; | |
| 810 } | |
| 811 else | |
| 812 { | |
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813 // Last string read. Remove from list |
| 7 | 814 ga_clear(&p->strings); |
| 815 ServerReplyFind(win, SROP_Delete); | |
| 816 } | |
| 817 return 0; | |
| 818 } | |
| 819 return -1; | |
| 820 } | |
| 821 | |
| 822 /* | |
| 823 * Check for replies from id (win). | |
| 824 * Return TRUE and a non-malloc'ed string if there is. Else return FALSE. | |
| 825 */ | |
| 826 int | |
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827 serverPeekReply(Display *dpy, Window win, char_u **str) |
| 7 | 828 { |
| 829 struct ServerReply *p; | |
| 830 | |
| 831 if ((p = ServerReplyFind(win, SROP_Find)) != NULL && p->strings.ga_len > 0) | |
| 832 { | |
| 833 if (str != NULL) | |
| 834 *str = p->strings.ga_data; | |
| 835 return 1; | |
| 836 } | |
| 837 if (!WindowValid(dpy, win)) | |
| 838 return -1; | |
| 839 return 0; | |
| 840 } | |
| 841 | |
| 842 | |
| 843 /* | |
| 844 * Initialize the communication channels for sending commands and receiving | |
| 845 * results. | |
| 846 */ | |
| 847 static int | |
|
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848 SendInit(Display *dpy) |
| 7 | 849 { |
| 850 XErrorHandler old_handler; | |
| 851 | |
| 852 /* | |
| 853 * Create the window used for communication, and set up an | |
| 854 * event handler for it. | |
| 855 */ | |
| 856 old_handler = XSetErrorHandler(x_error_check); | |
| 857 got_x_error = FALSE; | |
| 858 | |
| 859 if (commProperty == None) | |
| 860 commProperty = XInternAtom(dpy, "Comm", False); | |
| 861 if (vimProperty == None) | |
| 862 vimProperty = XInternAtom(dpy, "Vim", False); | |
| 863 if (registryProperty == None) | |
| 864 registryProperty = XInternAtom(dpy, "VimRegistry", False); | |
| 865 | |
| 866 if (commWindow == None) | |
| 867 { | |
| 868 commWindow = XCreateSimpleWindow(dpy, XDefaultRootWindow(dpy), | |
| 869 getpid(), 0, 10, 10, 0, | |
| 870 WhitePixel(dpy, DefaultScreen(dpy)), | |
| 871 WhitePixel(dpy, DefaultScreen(dpy))); | |
| 872 XSelectInput(dpy, commWindow, PropertyChangeMask); | |
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873 // WARNING: Do not step through this while debugging, it will hangup |
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874 // the X server! |
| 7 | 875 XGrabServer(dpy); |
| 876 DeleteAnyLingerer(dpy, commWindow); | |
| 877 XUngrabServer(dpy); | |
| 878 } | |
| 879 | |
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880 // Make window recognizable as a vim window |
| 7 | 881 XChangeProperty(dpy, commWindow, vimProperty, XA_STRING, |
| 882 8, PropModeReplace, (char_u *)VIM_VERSION_SHORT, | |
| 883 (int)STRLEN(VIM_VERSION_SHORT) + 1); | |
| 884 | |
| 885 XSync(dpy, False); | |
| 886 (void)XSetErrorHandler(old_handler); | |
| 887 | |
| 888 return got_x_error ? -1 : 0; | |
| 889 } | |
| 890 | |
| 891 /* | |
| 892 * Given a server name, see if the name exists in the registry for a | |
| 893 * particular display. | |
| 894 * | |
| 895 * If the given name is registered, return the ID of the window associated | |
| 896 * with the name. If the name isn't registered, then return 0. | |
| 897 * | |
| 898 * Side effects: | |
| 899 * If the registry property is improperly formed, then it is deleted. | |
| 900 * If "delete" is non-zero, then if the named server is found it is | |
| 901 * removed from the registry property. | |
| 902 */ | |
| 903 static Window | |
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904 LookupName( |
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905 Display *dpy, // Display whose registry to check. |
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906 char_u *name, // Name of a server. |
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907 int delete, // If non-zero, delete info about name. |
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908 char_u **loose) // Do another search matching -999 if not found |
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909 // Return result here if a match is found |
| 7 | 910 { |
| 911 char_u *regProp, *entry; | |
| 912 char_u *p; | |
| 913 long_u numItems; | |
| 914 int_u returnValue; | |
| 915 | |
| 916 /* | |
| 917 * Read the registry property. | |
| 918 */ | |
| 919 if (GetRegProp(dpy, ®Prop, &numItems, FALSE) == FAIL) | |
| 920 return 0; | |
| 921 | |
| 922 /* | |
| 923 * Scan the property for the desired name. | |
| 924 */ | |
| 925 returnValue = (int_u)None; | |
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926 entry = NULL; // Not needed, but eliminates compiler warning. |
| 1880 | 927 for (p = regProp; (long_u)(p - regProp) < numItems; ) |
| 7 | 928 { |
| 929 entry = p; | |
| 930 while (*p != 0 && !isspace(*p)) | |
| 931 p++; | |
| 932 if (*p != 0 && STRICMP(name, p + 1) == 0) | |
| 933 { | |
| 934 sscanf((char *)entry, "%x", &returnValue); | |
| 935 break; | |
| 936 } | |
| 937 while (*p != 0) | |
| 938 p++; | |
| 939 p++; | |
| 940 } | |
| 941 | |
| 942 if (loose != NULL && returnValue == (int_u)None && !IsSerialName(name)) | |
| 943 { | |
| 1880 | 944 for (p = regProp; (long_u)(p - regProp) < numItems; ) |
| 7 | 945 { |
| 946 entry = p; | |
| 947 while (*p != 0 && !isspace(*p)) | |
| 948 p++; | |
| 949 if (*p != 0 && IsSerialName(p + 1) | |
| 950 && STRNICMP(name, p + 1, STRLEN(name)) == 0) | |
| 951 { | |
| 952 sscanf((char *)entry, "%x", &returnValue); | |
| 953 *loose = vim_strsave(p + 1); | |
| 954 break; | |
| 955 } | |
| 956 while (*p != 0) | |
| 957 p++; | |
| 958 p++; | |
| 959 } | |
| 960 } | |
| 961 | |
| 962 /* | |
| 963 * Delete the property, if that is desired (copy down the | |
| 964 * remainder of the registry property to overlay the deleted | |
| 965 * info, then rewrite the property). | |
| 966 */ | |
| 967 if (delete && returnValue != (int_u)None) | |
| 968 { | |
| 969 int count; | |
| 970 | |
| 971 while (*p != 0) | |
| 972 p++; | |
| 973 p++; | |
| 974 count = numItems - (p - regProp); | |
| 975 if (count > 0) | |
| 1740 | 976 mch_memmove(entry, p, count); |
| 7 | 977 XChangeProperty(dpy, RootWindow(dpy, 0), registryProperty, XA_STRING, |
| 978 8, PropModeReplace, regProp, | |
| 979 (int)(numItems - (p - entry))); | |
| 980 XSync(dpy, False); | |
| 981 } | |
| 982 | |
| 983 if (regProp != empty_prop) | |
| 984 XFree(regProp); | |
| 985 return (Window)returnValue; | |
| 986 } | |
| 987 | |
| 988 /* | |
| 1197 | 989 * Delete any lingering occurrence of window id. We promise that any |
| 990 * occurrence is not ours since it is not yet put into the registry (by us) | |
| 7 | 991 * |
| 992 * This is necessary in the following scenario: | |
| 993 * 1. There is an old windowid for an exit'ed vim in the registry | |
| 994 * 2. We get that id for our commWindow but only want to send, not register. | |
| 995 * 3. The window will mistakenly be regarded valid because of own commWindow | |
| 996 */ | |
| 997 static void | |
|
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998 DeleteAnyLingerer( |
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999 Display *dpy, // Display whose registry to check. |
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1000 Window win) // Window to remove |
| 7 | 1001 { |
| 1002 char_u *regProp, *entry = NULL; | |
| 1003 char_u *p; | |
| 1004 long_u numItems; | |
| 28 | 1005 int_u wwin; |
| 7 | 1006 |
| 1007 /* | |
| 1008 * Read the registry property. | |
| 1009 */ | |
| 1010 if (GetRegProp(dpy, ®Prop, &numItems, FALSE) == FAIL) | |
| 1011 return; | |
| 1012 | |
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1013 // Scan the property for the window id. |
| 1880 | 1014 for (p = regProp; (long_u)(p - regProp) < numItems; ) |
| 7 | 1015 { |
| 1016 if (*p != 0) | |
| 1017 { | |
| 28 | 1018 sscanf((char *)p, "%x", &wwin); |
| 1019 if ((Window)wwin == win) | |
| 7 | 1020 { |
| 1021 int lastHalf; | |
| 1022 | |
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1023 // Copy down the remainder to delete entry |
| 7 | 1024 entry = p; |
| 1025 while (*p != 0) | |
| 1026 p++; | |
| 1027 p++; | |
| 1028 lastHalf = numItems - (p - regProp); | |
| 1029 if (lastHalf > 0) | |
| 1740 | 1030 mch_memmove(entry, p, lastHalf); |
| 7 | 1031 numItems = (entry - regProp) + lastHalf; |
| 1032 p = entry; | |
| 1033 continue; | |
| 1034 } | |
| 1035 } | |
| 1036 while (*p != 0) | |
| 1037 p++; | |
| 1038 p++; | |
| 1039 } | |
| 1040 | |
| 1041 if (entry != NULL) | |
| 1042 { | |
| 1043 XChangeProperty(dpy, RootWindow(dpy, 0), registryProperty, | |
| 1044 XA_STRING, 8, PropModeReplace, regProp, | |
| 1045 (int)(p - regProp)); | |
| 1046 XSync(dpy, False); | |
| 1047 } | |
| 1048 | |
| 1049 if (regProp != empty_prop) | |
| 1050 XFree(regProp); | |
| 1051 } | |
| 1052 | |
| 1053 /* | |
| 1054 * Read the registry property. Delete it when it's formatted wrong. | |
| 1055 * Return the property in "regPropp". "empty_prop" is used when it doesn't | |
| 1056 * exist yet. | |
| 1057 * Return OK when successful. | |
| 1058 */ | |
| 1059 static int | |
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1060 GetRegProp( |
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1061 Display *dpy, |
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1062 char_u **regPropp, |
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1063 long_u *numItemsp, |
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1064 int domsg) // When TRUE give error message. |
| 7 | 1065 { |
| 1066 int result, actualFormat; | |
| 1067 long_u bytesAfter; | |
| 1068 Atom actualType; | |
| 819 | 1069 XErrorHandler old_handler; |
| 7 | 1070 |
| 1071 *regPropp = NULL; | |
| 819 | 1072 old_handler = XSetErrorHandler(x_error_check); |
| 1073 got_x_error = FALSE; | |
| 1074 | |
| 7 | 1075 result = XGetWindowProperty(dpy, RootWindow(dpy, 0), registryProperty, 0L, |
| 1076 (long)MAX_PROP_WORDS, False, | |
| 1077 XA_STRING, &actualType, | |
| 1078 &actualFormat, numItemsp, &bytesAfter, | |
| 1079 regPropp); | |
| 1080 | |
| 819 | 1081 XSync(dpy, FALSE); |
| 1082 (void)XSetErrorHandler(old_handler); | |
| 1083 if (got_x_error) | |
| 1084 return FAIL; | |
| 1085 | |
| 7 | 1086 if (actualType == None) |
| 1087 { | |
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1088 // No prop yet. Logically equal to the empty list |
| 7 | 1089 *numItemsp = 0; |
| 1090 *regPropp = empty_prop; | |
| 1091 return OK; | |
| 1092 } | |
| 1093 | |
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1094 // If the property is improperly formed, then delete it. |
| 7 | 1095 if (result != Success || actualFormat != 8 || actualType != XA_STRING) |
| 1096 { | |
| 1097 if (*regPropp != NULL) | |
| 1098 XFree(*regPropp); | |
| 1099 XDeleteProperty(dpy, RootWindow(dpy, 0), registryProperty); | |
| 1100 if (domsg) | |
|
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1101 emsg(_(e_vim_instance_registry_property_is_badly_formed_deleted)); |
| 7 | 1102 return FAIL; |
| 1103 } | |
| 1104 return OK; | |
| 1105 } | |
| 1106 | |
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1107 |
| 7 | 1108 /* |
| 1197 | 1109 * This procedure is invoked by the various X event loops throughout Vims when |
| 7 | 1110 * a property changes on the communication window. This procedure reads the |
|
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1111 * property and enqueues command requests and responses. If immediate is true, |
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1112 * it runs the event immediately instead of enqueuing it. Immediate can cause |
|
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1113 * unintended behavior and should only be used for code that blocks for a |
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1114 * response. |
| 7 | 1115 */ |
| 1116 void | |
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1117 serverEventProc( |
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1118 Display *dpy, |
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1119 XEvent *eventPtr, // Information about event. |
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1120 int immediate) // Run event immediately. Should mostly be 0. |
| 7 | 1121 { |
| 1122 char_u *propInfo; | |
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1123 int result, actualFormat; |
| 7 | 1124 long_u numItems, bytesAfter; |
| 1125 Atom actualType; | |
| 1126 | |
| 1127 if (eventPtr != NULL) | |
| 1128 { | |
| 1129 if (eventPtr->xproperty.atom != commProperty | |
| 1130 || eventPtr->xproperty.state != PropertyNewValue) | |
| 1131 return; | |
| 1132 } | |
| 1133 | |
| 1134 /* | |
| 1135 * Read the comm property and delete it. | |
| 1136 */ | |
| 1137 propInfo = NULL; | |
| 1138 result = XGetWindowProperty(dpy, commWindow, commProperty, 0L, | |
| 1139 (long)MAX_PROP_WORDS, True, | |
| 1140 XA_STRING, &actualType, | |
| 1141 &actualFormat, &numItems, &bytesAfter, | |
| 1142 &propInfo); | |
| 1143 | |
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1144 // If the property doesn't exist or is improperly formed then ignore it. |
| 7 | 1145 if (result != Success || actualType != XA_STRING || actualFormat != 8) |
| 1146 { | |
| 1147 if (propInfo != NULL) | |
| 1148 XFree(propInfo); | |
| 1149 return; | |
| 1150 } | |
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1151 if (immediate) |
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1152 server_parse_message(dpy, propInfo, numItems); |
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1153 else |
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1154 save_in_queue(propInfo, numItems); |
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1155 } |
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1156 |
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1157 /* |
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1158 * Saves x clientserver commands in a queue so that they can be called when |
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1159 * vim is idle. |
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1160 */ |
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1161 static void |
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1162 save_in_queue(char_u *propInfo, long_u len) |
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1163 { |
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1164 x_queue_T *node; |
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1165 |
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1166 node = ALLOC_ONE(x_queue_T); |
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1167 if (node == NULL) |
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1168 return; // out of memory |
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1169 node->propInfo = propInfo; |
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1170 node->len = len; |
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1171 |
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1172 if (head.next == NULL) // initialize circular queue |
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1173 { |
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1174 head.next = &head; |
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1175 head.prev = &head; |
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1176 } |
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1177 |
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1178 // insert node at tail of queue |
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1179 node->next = &head; |
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1180 node->prev = head.prev; |
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1181 head.prev->next = node; |
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1182 head.prev = node; |
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1183 } |
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1184 |
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1185 /* |
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1186 * Parses queued clientserver messages. |
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1187 */ |
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1188 void |
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1189 server_parse_messages(void) |
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1190 { |
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1191 x_queue_T *node; |
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1192 |
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1193 if (!X_DISPLAY) |
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1194 return; // cannot happen? |
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1195 while (head.next != NULL && head.next != &head) |
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1196 { |
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1197 node = head.next; |
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1198 head.next = node->next; |
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1199 node->next->prev = node->prev; |
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1200 server_parse_message(X_DISPLAY, node->propInfo, node->len); |
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1201 vim_free(node); |
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1202 } |
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1203 } |
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1204 |
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1205 /* |
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1206 * Returns a non-zero value if there are clientserver messages waiting |
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1207 * int the queue. |
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1208 */ |
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1209 int |
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1210 server_waiting(void) |
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1211 { |
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1212 return head.next != NULL && head.next != &head; |
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1213 } |
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1214 |
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1215 /* |
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1216 * Prases a single clientserver message. A single message may contain multiple |
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1217 * commands. |
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1218 * "propInfo" will be freed. |
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1219 */ |
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1220 static void |
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1221 server_parse_message( |
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1222 Display *dpy, |
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1223 char_u *propInfo, // A string containing 0 or more X commands |
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1224 long_u numItems) // The size of propInfo in bytes. |
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1225 { |
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1226 char_u *p; |
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1227 int code; |
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1228 char_u *tofree; |
| 7 | 1229 |
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1230 #if defined(FEAT_EVAL) |
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1231 ch_log(NULL, "server_parse_message() numItems: %ld", numItems); |
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1232 #endif |
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1233 |
| 7 | 1234 /* |
| 1235 * Several commands and results could arrive in the property at | |
| 1236 * one time; each iteration through the outer loop handles a | |
| 1237 * single command or result. | |
| 1238 */ | |
| 1880 | 1239 for (p = propInfo; (long_u)(p - propInfo) < numItems; ) |
| 7 | 1240 { |
| 1241 /* | |
| 1242 * Ignore leading NULs; each command or result starts with a | |
| 1243 * NUL so that no matter how badly formed a preceding command | |
| 1244 * is, we'll be able to tell that a new command/result is | |
| 1245 * starting. | |
| 1246 */ | |
| 1247 if (*p == 0) | |
| 1248 { | |
| 1249 p++; | |
| 1250 continue; | |
| 1251 } | |
| 1252 | |
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1253 if ((*p == 'c' || *p == 'k') && p[1] == 0) |
| 7 | 1254 { |
| 1255 Window resWindow; | |
| 3668 | 1256 char_u *name, *script, *serial, *end; |
| 7 | 1257 Bool asKeys = *p == 'k'; |
| 39 | 1258 char_u *enc; |
| 7 | 1259 |
| 1260 /* | |
| 1261 * This is an incoming command from some other application. | |
| 1262 * Iterate over all of its options. Stop when we reach | |
| 1263 * the end of the property or something that doesn't look | |
| 1264 * like an option. | |
| 1265 */ | |
| 1266 p += 2; | |
| 1267 name = NULL; | |
| 1268 resWindow = None; | |
| 1269 serial = (char_u *)""; | |
| 1270 script = NULL; | |
| 39 | 1271 enc = NULL; |
| 1880 | 1272 while ((long_u)(p - propInfo) < numItems && *p == '-') |
| 7 | 1273 { |
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1274 #if defined(FEAT_EVAL) |
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1275 ch_log(NULL, "server_parse_message() item: %c, %s", p[-2], p); |
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1276 #endif |
| 7 | 1277 switch (p[1]) |
| 1278 { | |
| 1279 case 'r': | |
| 1280 end = skipwhite(p + 2); | |
| 1281 resWindow = 0; | |
| 1282 while (vim_isxdigit(*end)) | |
| 1283 { | |
| 1284 resWindow = 16 * resWindow + (long_u)hex2nr(*end); | |
| 1285 ++end; | |
| 1286 } | |
| 1287 if (end == p + 2 || *end != ' ') | |
| 1288 resWindow = None; | |
| 1289 else | |
| 1290 { | |
| 1291 p = serial = end + 1; | |
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1292 clientWindow = resWindow; // Remember in global |
| 7 | 1293 } |
| 1294 break; | |
| 1295 case 'n': | |
| 1296 if (p[2] == ' ') | |
| 1297 name = p + 3; | |
| 1298 break; | |
| 1299 case 's': | |
| 1300 if (p[2] == ' ') | |
| 1301 script = p + 3; | |
| 1302 break; | |
| 39 | 1303 case 'E': |
| 1304 if (p[2] == ' ') | |
| 1305 enc = p + 3; | |
| 1306 break; | |
| 7 | 1307 } |
| 1308 while (*p != 0) | |
| 1309 p++; | |
| 1310 p++; | |
| 1311 } | |
| 1312 | |
| 1313 if (script == NULL || name == NULL) | |
| 1314 continue; | |
| 1315 | |
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1316 if (serverName != NULL && STRICMP(name, serverName) == 0) |
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1317 { |
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1318 script = serverConvert(enc, script, &tofree); |
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1319 if (asKeys) |
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1320 server_to_input_buf(script); |
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1321 else |
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1322 { |
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1323 char_u *res; |
| 3668 | 1324 |
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1325 res = eval_client_expr_to_string(script); |
| 3668 | 1326 if (resWindow != None) |
| 1327 { | |
| 1328 garray_T reply; | |
| 1329 | |
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1330 // Initialize the result property. |
| 3668 | 1331 ga_init2(&reply, 1, 100); |
| 7009 | 1332 (void)ga_grow(&reply, 50 + STRLEN(p_enc)); |
| 3668 | 1333 sprintf(reply.ga_data, "%cr%c-E %s%c-s %s%c-r ", |
| 39 | 1334 0, 0, p_enc, 0, serial, 0); |
| 3668 | 1335 reply.ga_len = 14 + STRLEN(p_enc) + STRLEN(serial); |
| 1336 | |
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1337 // Evaluate the expression and return the result. |
| 3668 | 1338 if (res != NULL) |
| 1339 ga_concat(&reply, res); | |
| 1340 else | |
| 1341 { | |
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1342 ga_concat(&reply, |
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1343 (char_u *)_(e_invalid_expression_received)); |
| 3668 | 1344 ga_append(&reply, 0); |
| 1345 ga_concat(&reply, (char_u *)"-c 1"); | |
| 1346 } | |
| 1347 ga_append(&reply, NUL); | |
| 1348 (void)AppendPropCarefully(dpy, resWindow, commProperty, | |
| 1349 reply.ga_data, reply.ga_len); | |
| 1350 ga_clear(&reply); | |
| 1351 } | |
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1352 vim_free(res); |
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1353 } |
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1354 vim_free(tofree); |
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1355 } |
| 7 | 1356 } |
| 1357 else if (*p == 'r' && p[1] == 0) | |
| 1358 { | |
| 39 | 1359 int serial, gotSerial; |
| 1360 char_u *res; | |
| 1361 PendingCommand *pcPtr; | |
| 1362 char_u *enc; | |
| 7 | 1363 |
| 1364 /* | |
| 1365 * This is a reply to some command that we sent out. Iterate | |
| 1366 * over all of its options. Stop when we reach the end of the | |
| 1367 * property or something that doesn't look like an option. | |
| 1368 */ | |
| 1369 p += 2; | |
| 1370 gotSerial = 0; | |
| 1371 res = (char_u *)""; | |
| 1372 code = 0; | |
| 39 | 1373 enc = NULL; |
| 1880 | 1374 while ((long_u)(p - propInfo) < numItems && *p == '-') |
| 7 | 1375 { |
| 1376 switch (p[1]) | |
| 1377 { | |
| 1378 case 'r': | |
| 1379 if (p[2] == ' ') | |
| 1380 res = p + 3; | |
| 1381 break; | |
| 39 | 1382 case 'E': |
| 1383 if (p[2] == ' ') | |
| 1384 enc = p + 3; | |
| 1385 break; | |
| 7 | 1386 case 's': |
| 1387 if (sscanf((char *)p + 2, " %d", &serial) == 1) | |
| 1388 gotSerial = 1; | |
| 1389 break; | |
| 1390 case 'c': | |
| 1391 if (sscanf((char *)p + 2, " %d", &code) != 1) | |
| 1392 code = 0; | |
| 1393 break; | |
| 1394 } | |
| 1395 while (*p != 0) | |
| 1396 p++; | |
| 1397 p++; | |
| 1398 } | |
| 1399 | |
| 1400 if (!gotSerial) | |
| 1401 continue; | |
| 1402 | |
| 1403 /* | |
| 1404 * Give the result information to anyone who's | |
| 1405 * waiting for it. | |
| 1406 */ | |
| 1407 for (pcPtr = pendingCommands; pcPtr != NULL; pcPtr = pcPtr->nextPtr) | |
| 1408 { | |
| 1409 if (serial != pcPtr->serial || pcPtr->result != NULL) | |
| 1410 continue; | |
| 1411 | |
| 1412 pcPtr->code = code; | |
| 7009 | 1413 res = serverConvert(enc, res, &tofree); |
| 1414 if (tofree == NULL) | |
| 1415 res = vim_strsave(res); | |
| 1416 pcPtr->result = res; | |
| 7 | 1417 break; |
| 1418 } | |
| 1419 } | |
| 1420 else if (*p == 'n' && p[1] == 0) | |
| 1421 { | |
| 1422 Window win = 0; | |
| 1423 unsigned int u; | |
| 1424 int gotWindow; | |
| 1425 char_u *str; | |
| 1426 struct ServerReply *r; | |
| 39 | 1427 char_u *enc; |
| 7 | 1428 |
| 1429 /* | |
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1430 * This is a (n)otification. Sent with serverreply_send in Vim |
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patch 8.0.0360: sometimes VimL is used instead of "Vim script"
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parents:
10042
diff
changeset
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1431 * script. Execute any autocommand and save it for later retrieval |
| 7 | 1432 */ |
| 1433 p += 2; | |
| 1434 gotWindow = 0; | |
| 1435 str = (char_u *)""; | |
| 39 | 1436 enc = NULL; |
| 1880 | 1437 while ((long_u)(p - propInfo) < numItems && *p == '-') |
| 7 | 1438 { |
| 1439 switch (p[1]) | |
| 1440 { | |
| 1441 case 'n': | |
| 1442 if (p[2] == ' ') | |
| 1443 str = p + 3; | |
| 1444 break; | |
| 39 | 1445 case 'E': |
| 1446 if (p[2] == ' ') | |
| 1447 enc = p + 3; | |
| 1448 break; | |
| 7 | 1449 case 'w': |
| 1450 if (sscanf((char *)p + 2, " %x", &u) == 1) | |
| 1451 { | |
| 1452 win = u; | |
| 1453 gotWindow = 1; | |
| 1454 } | |
| 1455 break; | |
| 1456 } | |
| 1457 while (*p != 0) | |
| 1458 p++; | |
| 1459 p++; | |
| 1460 } | |
| 1461 | |
| 1462 if (!gotWindow) | |
| 1463 continue; | |
| 39 | 1464 str = serverConvert(enc, str, &tofree); |
| 7 | 1465 if ((r = ServerReplyFind(win, SROP_Add)) != NULL) |
| 1466 { | |
| 1467 ga_concat(&(r->strings), str); | |
| 21 | 1468 ga_append(&(r->strings), NUL); |
| 7 | 1469 } |
| 1698 | 1470 { |
| 1471 char_u winstr[30]; | |
| 1472 | |
| 1473 sprintf((char *)winstr, "0x%x", (unsigned int)win); | |
| 1474 apply_autocmds(EVENT_REMOTEREPLY, winstr, str, TRUE, curbuf); | |
| 1475 } | |
| 39 | 1476 vim_free(tofree); |
| 7 | 1477 } |
| 1478 else | |
| 1479 { | |
| 1480 /* | |
| 1481 * Didn't recognize this thing. Just skip through the next | |
| 1482 * null character and try again. | |
| 1483 * Even if we get an 'r'(eply) we will throw it away as we | |
| 1484 * never specify (and thus expect) one | |
| 1485 */ | |
| 1486 while (*p != 0) | |
| 1487 p++; | |
| 1488 p++; | |
| 1489 } | |
| 1490 } | |
| 1491 XFree(propInfo); | |
| 1492 } | |
| 1493 | |
| 1494 /* | |
| 1495 * Append a given property to a given window, but set up an X error handler so | |
| 1496 * that if the append fails this procedure can return an error code rather | |
| 1497 * than having Xlib panic. | |
| 1498 * Return: 0 for OK, -1 for error | |
| 1499 */ | |
| 1500 static int | |
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commit https://github.com/vim/vim/commit/68c2f638e65d914dc6e84eb7ce2624f08af525c0
Christian Brabandt <cb@256bit.org>
parents:
7803
diff
changeset
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1501 AppendPropCarefully( |
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18798
f0f9692d4487
patch 8.1.2387: using old C style comments
Bram Moolenaar <Bram@vim.org>
parents:
18642
diff
changeset
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1502 Display *dpy, // Display on which to operate. |
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patch 8.1.2387: using old C style comments
Bram Moolenaar <Bram@vim.org>
parents:
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diff
changeset
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1503 Window window, // Window whose property is to be modified. |
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patch 8.1.2387: using old C style comments
Bram Moolenaar <Bram@vim.org>
parents:
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diff
changeset
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1504 Atom property, // Name of property. |
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f0f9692d4487
patch 8.1.2387: using old C style comments
Bram Moolenaar <Bram@vim.org>
parents:
18642
diff
changeset
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1505 char_u *value, // Characters to append to property. |
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patch 8.1.2387: using old C style comments
Bram Moolenaar <Bram@vim.org>
parents:
18642
diff
changeset
|
1506 int length) // How much to append |
| 7 | 1507 { |
| 1508 XErrorHandler old_handler; | |
| 1509 | |
| 1510 old_handler = XSetErrorHandler(x_error_check); | |
| 1511 got_x_error = FALSE; | |
| 1512 XChangeProperty(dpy, window, property, XA_STRING, 8, | |
| 1513 PropModeAppend, value, length); | |
| 1514 XSync(dpy, False); | |
| 1515 (void) XSetErrorHandler(old_handler); | |
| 1516 return got_x_error ? -1 : 0; | |
| 1517 } | |
| 1518 | |
| 1519 | |
| 1520 /* | |
| 1521 * Another X Error handler, just used to check for errors. | |
| 1522 */ | |
| 1523 static int | |
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commit https://github.com/vim/vim/commit/68c2f638e65d914dc6e84eb7ce2624f08af525c0
Christian Brabandt <cb@256bit.org>
parents:
7803
diff
changeset
|
1524 x_error_check(Display *dpy UNUSED, XErrorEvent *error_event UNUSED) |
| 7 | 1525 { |
| 1526 got_x_error = TRUE; | |
| 1527 return 0; | |
| 1528 } | |
| 1529 | |
| 1530 /* | |
| 1531 * Check if "str" looks like it had a serial number appended. | |
| 1532 * Actually just checks if the name ends in a digit. | |
| 1533 */ | |
| 1534 static int | |
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commit https://github.com/vim/vim/commit/68c2f638e65d914dc6e84eb7ce2624f08af525c0
Christian Brabandt <cb@256bit.org>
parents:
7803
diff
changeset
|
1535 IsSerialName(char_u *str) |
| 7 | 1536 { |
| 1537 int len = STRLEN(str); | |
| 1538 | |
| 1539 return (len > 1 && vim_isdigit(str[len - 1])); | |
| 1540 } | |
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Bram Moolenaar <Bram@vim.org>
parents:
18642
diff
changeset
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1541 #endif // FEAT_CLIENTSERVER |