1/****************************************************************************** 2 * 3 * Module Name: acgetline - local line editing 4 * 5 *****************************************************************************/ 6 7/****************************************************************************** 8 * 9 * 1. Copyright Notice 10 * 11 * Some or all of this work - Copyright (c) 1999 - 2017, Intel Corp. 12 * All rights reserved. 13 * 14 * 2. License 15 * 16 * 2.1. This is your license from Intel Corp. under its intellectual property 17 * rights. You may have additional license terms from the party that provided 18 * you this software, covering your right to use that party's intellectual 19 * property rights. 20 * 21 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 22 * copy of the source code appearing in this file ("Covered Code") an 23 * irrevocable, perpetual, worldwide license under Intel's copyrights in the 24 * base code distributed originally by Intel ("Original Intel Code") to copy, 25 * make derivatives, distribute, use and display any portion of the Covered 26 * Code in any form, with the right to sublicense such rights; and 27 * 28 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 29 * license (with the right to sublicense), under only those claims of Intel 30 * patents that are infringed by the Original Intel Code, to make, use, sell, 31 * offer to sell, and import the Covered Code and derivative works thereof 32 * solely to the minimum extent necessary to exercise the above copyright 33 * license, and in no event shall the patent license extend to any additions 34 * to or modifications of the Original Intel Code. No other license or right 35 * is granted directly or by implication, estoppel or otherwise; 36 * 37 * The above copyright and patent license is granted only if the following 38 * conditions are met: 39 * 40 * 3. Conditions 41 * 42 * 3.1. Redistribution of Source with Rights to Further Distribute Source. 43 * Redistribution of source code of any substantial portion of the Covered 44 * Code or modification with rights to further distribute source must include 45 * the above Copyright Notice, the above License, this list of Conditions, 46 * and the following Disclaimer and Export Compliance provision. In addition, 47 * Licensee must cause all Covered Code to which Licensee contributes to 48 * contain a file documenting the changes Licensee made to create that Covered 49 * Code and the date of any change. Licensee must include in that file the 50 * documentation of any changes made by any predecessor Licensee. Licensee 51 * must include a prominent statement that the modification is derived, 52 * directly or indirectly, from Original Intel Code. 53 * 54 * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 55 * Redistribution of source code of any substantial portion of the Covered 56 * Code or modification without rights to further distribute source must 57 * include the following Disclaimer and Export Compliance provision in the 58 * documentation and/or other materials provided with distribution. In 59 * addition, Licensee may not authorize further sublicense of source of any 60 * portion of the Covered Code, and must include terms to the effect that the 61 * license from Licensee to its licensee is limited to the intellectual 62 * property embodied in the software Licensee provides to its licensee, and 63 * not to intellectual property embodied in modifications its licensee may 64 * make. 65 * 66 * 3.3. Redistribution of Executable. Redistribution in executable form of any 67 * substantial portion of the Covered Code or modification must reproduce the 68 * above Copyright Notice, and the following Disclaimer and Export Compliance 69 * provision in the documentation and/or other materials provided with the 70 * distribution. 71 * 72 * 3.4. Intel retains all right, title, and interest in and to the Original 73 * Intel Code. 74 * 75 * 3.5. Neither the name Intel nor any other trademark owned or controlled by 76 * Intel shall be used in advertising or otherwise to promote the sale, use or 77 * other dealings in products derived from or relating to the Covered Code 78 * without prior written authorization from Intel. 79 * 80 * 4. Disclaimer and Export Compliance 81 * 82 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 83 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 84 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 85 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 86 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 87 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 88 * PARTICULAR PURPOSE. 89 * 90 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 91 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 92 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 93 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 94 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 95 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 96 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 97 * LIMITED REMEDY. 98 * 99 * 4.3. Licensee shall not export, either directly or indirectly, any of this 100 * software or system incorporating such software without first obtaining any 101 * required license or other approval from the U. S. Department of Commerce or 102 * any other agency or department of the United States Government. In the 103 * event Licensee exports any such software from the United States or 104 * re-exports any such software from a foreign destination, Licensee shall 105 * ensure that the distribution and export/re-export of the software is in 106 * compliance with all laws, regulations, orders, or other restrictions of the 107 * U.S. Export Administration Regulations. Licensee agrees that neither it nor 108 * any of its subsidiaries will export/re-export any technical data, process, 109 * software, or service, directly or indirectly, to any country for which the 110 * United States government or any agency thereof requires an export license, 111 * other governmental approval, or letter of assurance, without first obtaining 112 * such license, approval or letter. 113 * 114 ***************************************************************************** 115 * 116 * Alternatively, you may choose to be licensed under the terms of the 117 * following license: 118 * 119 * Redistribution and use in source and binary forms, with or without 120 * modification, are permitted provided that the following conditions 121 * are met: 122 * 1. Redistributions of source code must retain the above copyright 123 * notice, this list of conditions, and the following disclaimer, 124 * without modification. 125 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 126 * substantially similar to the "NO WARRANTY" disclaimer below 127 * ("Disclaimer") and any redistribution must be conditioned upon 128 * including a substantially similar Disclaimer requirement for further 129 * binary redistribution. 130 * 3. Neither the names of the above-listed copyright holders nor the names 131 * of any contributors may be used to endorse or promote products derived 132 * from this software without specific prior written permission. 133 * 134 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 135 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 136 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 137 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 138 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 139 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 140 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 141 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 142 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 143 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 144 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 145 * 146 * Alternatively, you may choose to be licensed under the terms of the 147 * GNU General Public License ("GPL") version 2 as published by the Free 148 * Software Foundation. 149 * 150 *****************************************************************************/ 151 152#include <contrib/dev/acpica/include/acpi.h> 153#include <contrib/dev/acpica/include/accommon.h> 154#include <contrib/dev/acpica/include/amlcode.h> 155#include <contrib/dev/acpica/include/acparser.h> 156#include <contrib/dev/acpica/include/acdebug.h> 157 158/* 159 * This is an os-independent implementation of line-editing services needed 160 * by the AcpiExec utility. It uses getchar() and putchar() and the existing 161 * history support provided by the AML debugger. It assumes that the terminal 162 * is in the correct line-editing mode such as raw and noecho. The OSL 163 * interface AcpiOsInitialize should do this. AcpiOsTerminate should put the 164 * terminal back into the original mode. 165 */ 166#define _COMPONENT ACPI_OS_SERVICES 167 ACPI_MODULE_NAME ("acgetline") 168 169 170/* Local prototypes */ 171 172static void 173AcpiAcClearLine ( 174 UINT32 EndOfLine, 175 UINT32 CursorPosition); 176 177/* Various ASCII constants */ 178 179#define _ASCII_NUL 0 180#define _ASCII_BACKSPACE 0x08 181#define _ASCII_TAB 0x09 182#define _ASCII_ESCAPE 0x1B 183#define _ASCII_SPACE 0x20 184#define _ASCII_LEFT_BRACKET 0x5B 185#define _ASCII_DEL 0x7F 186#define _ASCII_UP_ARROW 'A' 187#define _ASCII_DOWN_ARROW 'B' 188#define _ASCII_RIGHT_ARROW 'C' 189#define _ASCII_LEFT_ARROW 'D' 190#define _ASCII_NEWLINE '\n' 191 192extern UINT32 AcpiGbl_NextCmdNum; 193 194/* Erase a single character on the input command line */ 195 196#define ACPI_CLEAR_CHAR() \ 197 putchar (_ASCII_BACKSPACE); \ 198 putchar (_ASCII_SPACE); \ 199 putchar (_ASCII_BACKSPACE); 200 201/* Backup cursor by Count positions */ 202 203#define ACPI_BACKUP_CURSOR(i, Count) \ 204 for (i = 0; i < (Count); i++) \ 205 {putchar (_ASCII_BACKSPACE);} 206 207 208/****************************************************************************** 209 * 210 * FUNCTION: AcpiAcClearLine 211 * 212 * PARAMETERS: EndOfLine - Current end-of-line index 213 * CursorPosition - Current cursor position within line 214 * 215 * RETURN: None 216 * 217 * DESCRIPTION: Clear the entire command line the hard way, but probably the 218 * most portable. 219 * 220 *****************************************************************************/ 221 222static void 223AcpiAcClearLine ( 224 UINT32 EndOfLine, 225 UINT32 CursorPosition) 226{ 227 UINT32 i; 228 229 230 if (CursorPosition < EndOfLine) 231 { 232 /* Clear line from current position to end of line */ 233 234 for (i = 0; i < (EndOfLine - CursorPosition); i++) 235 { 236 putchar (' '); 237 } 238 } 239 240 /* Clear the entire line */ 241 242 for (; EndOfLine > 0; EndOfLine--) 243 { 244 ACPI_CLEAR_CHAR (); 245 } 246} 247 248 249/****************************************************************************** 250 * 251 * FUNCTION: AcpiOsGetLine 252 * 253 * PARAMETERS: Buffer - Where to return the command line 254 * BufferLength - Maximum length of Buffer 255 * BytesRead - Where the actual byte count is returned 256 * 257 * RETURN: Status and actual bytes read 258 * 259 * DESCRIPTION: Get the next input line from the terminal. NOTE: terminal 260 * is expected to be in a mode that supports line-editing (raw, 261 * noecho). This function is intended to be very portable. Also, 262 * it uses the history support implemented in the AML debugger. 263 * 264 *****************************************************************************/ 265 266ACPI_STATUS 267AcpiOsGetLine ( 268 char *Buffer, 269 UINT32 BufferLength, 270 UINT32 *BytesRead) 271{ 272 char *NextCommand; 273 UINT32 MaxCommandIndex = AcpiGbl_NextCmdNum - 1; 274 UINT32 CurrentCommandIndex = MaxCommandIndex; 275 UINT32 PreviousCommandIndex = MaxCommandIndex; 276 int InputChar; 277 UINT32 CursorPosition = 0; 278 UINT32 EndOfLine = 0; 279 UINT32 i; 280 281 282 /* Always clear the line buffer before we read a new line */ 283 284 memset (Buffer, 0, BufferLength); 285 286 /* 287 * This loop gets one character at a time (except for esc sequences) 288 * until a newline or error is detected. 289 * 290 * Note: Don't attempt to write terminal control ESC sequences, even 291 * though it makes certain things more difficult. 292 */ 293 while (1) 294 { 295 if (EndOfLine >= (BufferLength - 1)) 296 { 297 return (AE_BUFFER_OVERFLOW); 298 } 299 300 InputChar = getchar (); 301 switch (InputChar) 302 { 303 default: /* This is the normal character case */ 304 305 /* Echo the character (at EOL) and copy it to the line buffer */ 306 307 if (EndOfLine == CursorPosition) 308 { 309 putchar (InputChar); 310 Buffer[EndOfLine] = (char) InputChar; 311 312 EndOfLine++; 313 CursorPosition++; 314 Buffer[EndOfLine] = 0; 315 continue; 316 } 317 318 /* Insert character into the middle of the buffer */ 319 320 memmove (&Buffer[CursorPosition + 1], &Buffer[CursorPosition], 321 (EndOfLine - CursorPosition + 1)); 322 323 Buffer [CursorPosition] = (char) InputChar; 324 Buffer [EndOfLine + 1] = 0; 325 326 /* Display the new part of line starting at the new character */ 327 328 fprintf (stdout, "%s", &Buffer[CursorPosition]); 329 330 /* Restore cursor */ 331 332 ACPI_BACKUP_CURSOR (i, EndOfLine - CursorPosition); 333 CursorPosition++; 334 EndOfLine++; 335 continue; 336 337 case _ASCII_DEL: /* Backspace key */ 338 339 if (!EndOfLine) /* Any characters on the command line? */ 340 { 341 continue; 342 } 343 344 if (EndOfLine == CursorPosition) /* Erase the final character */ 345 { 346 ACPI_CLEAR_CHAR (); 347 EndOfLine--; 348 CursorPosition--; 349 continue; 350 } 351 352 if (!CursorPosition) /* Do not backup beyond start of line */ 353 { 354 continue; 355 } 356 357 /* Remove the character from the line */ 358 359 memmove (&Buffer[CursorPosition - 1], &Buffer[CursorPosition], 360 (EndOfLine - CursorPosition + 1)); 361 362 /* Display the new part of line starting at the new character */ 363 364 putchar (_ASCII_BACKSPACE); 365 fprintf (stdout, "%s ", &Buffer[CursorPosition - 1]); 366 367 /* Restore cursor */ 368 369 ACPI_BACKUP_CURSOR (i, EndOfLine - CursorPosition + 1); 370 EndOfLine--; 371 372 if (CursorPosition > 0) 373 { 374 CursorPosition--; 375 } 376 continue; 377 378 case _ASCII_NEWLINE: /* Normal exit case at end of command line */ 379 case _ASCII_NUL: 380 381 /* Return the number of bytes in the command line string */ 382 383 if (BytesRead) 384 { 385 *BytesRead = EndOfLine; 386 } 387 388 /* Echo, terminate string buffer, and exit */ 389 390 putchar (InputChar); 391 Buffer[EndOfLine] = 0; 392 return (AE_OK); 393 394 case _ASCII_TAB: 395 396 /* Ignore */ 397 398 continue; 399 400 case EOF: 401 402 return (AE_ERROR); 403 404 case _ASCII_ESCAPE: 405 406 /* Check for escape sequences of the form "ESC[x" */ 407 408 InputChar = getchar (); 409 if (InputChar != _ASCII_LEFT_BRACKET) 410 { 411 continue; /* Ignore this ESC, does not have the '[' */ 412 } 413 414 /* Get the code following the ESC [ */ 415 416 InputChar = getchar (); /* Backup one character */ 417 switch (InputChar) 418 { 419 case _ASCII_LEFT_ARROW: 420 421 if (CursorPosition > 0) 422 { 423 putchar (_ASCII_BACKSPACE); 424 CursorPosition--; 425 } 426 continue; 427 428 case _ASCII_RIGHT_ARROW: 429 /* 430 * Move one character forward. Do this without sending 431 * ESC sequence to the terminal for max portability. 432 */ 433 if (CursorPosition < EndOfLine) 434 { 435 /* Backup to start of line and print the entire line */ 436 437 ACPI_BACKUP_CURSOR (i, CursorPosition); 438 fprintf (stdout, "%s", Buffer); 439 440 /* Backup to where the cursor should be */ 441 442 CursorPosition++; 443 ACPI_BACKUP_CURSOR (i, EndOfLine - CursorPosition); 444 } 445 continue; 446 447 case _ASCII_UP_ARROW: 448 449 /* If no commands available or at start of history list, ignore */ 450 451 if (!CurrentCommandIndex) 452 { 453 continue; 454 } 455 456 /* Manage our up/down progress */ 457 458 if (CurrentCommandIndex > PreviousCommandIndex) 459 { 460 CurrentCommandIndex = PreviousCommandIndex; 461 } 462 463 /* Get the historical command from the debugger */ 464 465 NextCommand = AcpiDbGetHistoryByIndex (CurrentCommandIndex); 466 if (!NextCommand) 467 { 468 return (AE_ERROR); 469 } 470 471 /* Make this the active command and echo it */ 472 473 AcpiAcClearLine (EndOfLine, CursorPosition); 474 strcpy (Buffer, NextCommand); 475 fprintf (stdout, "%s", Buffer); 476 EndOfLine = CursorPosition = strlen (Buffer); 477 478 PreviousCommandIndex = CurrentCommandIndex; 479 CurrentCommandIndex--; 480 continue; 481 482 case _ASCII_DOWN_ARROW: 483 484 if (!MaxCommandIndex) /* Any commands available? */ 485 { 486 continue; 487 } 488 489 /* Manage our up/down progress */ 490 491 if (CurrentCommandIndex < PreviousCommandIndex) 492 { 493 CurrentCommandIndex = PreviousCommandIndex; 494 } 495 496 /* If we are the end of the history list, output a clear new line */ 497 498 if ((CurrentCommandIndex + 1) > MaxCommandIndex) 499 { 500 AcpiAcClearLine (EndOfLine, CursorPosition); 501 EndOfLine = CursorPosition = 0; 502 PreviousCommandIndex = CurrentCommandIndex; 503 continue; 504 } 505 506 PreviousCommandIndex = CurrentCommandIndex; 507 CurrentCommandIndex++; 508 509 /* Get the historical command from the debugger */ 510 511 NextCommand = AcpiDbGetHistoryByIndex (CurrentCommandIndex); 512 if (!NextCommand) 513 { 514 return (AE_ERROR); 515 } 516 517 /* Make this the active command and echo it */ 518 519 AcpiAcClearLine (EndOfLine, CursorPosition); 520 strcpy (Buffer, NextCommand); 521 fprintf (stdout, "%s", Buffer); 522 EndOfLine = CursorPosition = strlen (Buffer); 523 continue; 524 525 case 0x31: 526 case 0x32: 527 case 0x33: 528 case 0x34: 529 case 0x35: 530 case 0x36: 531 /* 532 * Ignore the various keys like insert/delete/home/end, etc. 533 * But we must eat the final character of the ESC sequence. 534 */ 535 InputChar = getchar (); 536 continue; 537 538 default: 539 540 /* Ignore random escape sequences that we don't care about */ 541 542 continue; 543 } 544 continue; 545 } 546 } 547} 548