12fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o/* 22fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o * argv_parse.c --- utility function for parsing a string into a 32fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o * argc, argv array. 4efc6f628e15de95bcd13e4f0ee223cb42115d520Theodore Ts'o * 52fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o * This file defines a function argv_parse() which parsing a 62fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o * passed-in string, handling double quotes and backslashes, and 72fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o * creates an allocated argv vector which can be freed using the 82fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o * argv_free() function. 92fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o * 102fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o * See argv_parse.h for the formal definition of the functions. 112fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o * 122fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o * Copyright 1999 by Theodore Ts'o. 13efc6f628e15de95bcd13e4f0ee223cb42115d520Theodore Ts'o * 142fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o * Permission to use, copy, modify, and distribute this software for 152fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o * any purpose with or without fee is hereby granted, provided that 162fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o * the above copyright notice and this permission notice appear in all 172fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o * copies. THE SOFTWARE IS PROVIDED "AS IS" AND THEODORE TS'O (THE 182fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o * AUTHOR) DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, 192fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. 202fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, 212fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER 222fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION 232fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR 242fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o * IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. (Isn't 252fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o * it sick that the U.S. culture of lawsuit-happy lawyers requires 262fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o * this kind of disclaimer?) 272fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o * 282fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o * Version 1.1, modified 2/27/1999 292fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o */ 302fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o 312fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o#ifdef HAVE_STDLIB_H 322fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o#include <stdlib.h> 332fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o#endif 342fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o#include <ctype.h> 352fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o#include <string.h> 362fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o#include "argv_parse.h" 372fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o 382fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o#define STATE_WHITESPACE 1 392fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o#define STATE_TOKEN 2 402fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o#define STATE_QUOTED 3 412fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o 422fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o/* 432fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o * Returns 0 on success, -1 on failure. 442fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o */ 452fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'oint argv_parse(char *in_buf, int *ret_argc, char ***ret_argv) 462fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o{ 472fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o int argc = 0, max_argc = 0; 482fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o char **argv, **new_argv, *buf, ch; 492fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o char *cp = 0, *outcp = 0; 502fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o int state = STATE_WHITESPACE; 512fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o 522fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o buf = malloc(strlen(in_buf)+1); 532fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o if (!buf) 542fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o return -1; 552fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o 562fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o max_argc = 0; argc = 0; argv = 0; 572fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o outcp = buf; 582fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o for (cp = in_buf; (ch = *cp); cp++) { 592fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o if (state == STATE_WHITESPACE) { 602fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o if (isspace((int) ch)) 612fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o continue; 622fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o /* Not whitespace, so start a new token */ 632fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o state = STATE_TOKEN; 642fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o if (argc >= max_argc) { 652fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o max_argc += 3; 662fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o new_argv = realloc(argv, 672fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o (max_argc+1)*sizeof(char *)); 682fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o if (!new_argv) { 6945e338f5332a54295893dba2e32cc093d1316f60Jim Meyering free(argv); 702fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o free(buf); 712fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o return -1; 722fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o } 732fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o argv = new_argv; 742fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o } 752fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o argv[argc++] = outcp; 762fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o } 772fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o if (state == STATE_QUOTED) { 782fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o if (ch == '"') 792fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o state = STATE_TOKEN; 802fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o else 812fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o *outcp++ = ch; 822fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o continue; 832fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o } 842fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o /* Must be processing characters in a word */ 852fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o if (isspace((int) ch)) { 862fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o /* 872fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o * Terminate the current word and start 882fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o * looking for the beginning of the next word. 892fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o */ 902fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o *outcp++ = 0; 912fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o state = STATE_WHITESPACE; 922fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o continue; 932fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o } 942fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o if (ch == '"') { 952fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o state = STATE_QUOTED; 962fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o continue; 972fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o } 982fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o if (ch == '\\') { 992fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o ch = *++cp; 1002fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o switch (ch) { 1012fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o case '\0': 1022fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o ch = '\\'; cp--; break; 1032fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o case 'n': 1042fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o ch = '\n'; break; 1052fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o case 't': 1062fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o ch = '\t'; break; 1072fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o case 'b': 1082fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o ch = '\b'; break; 1092fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o } 1102fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o } 1112fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o *outcp++ = ch; 1122fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o } 1132fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o if (state != STATE_WHITESPACE) 1142fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o *outcp++ = '\0'; 1152fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o if (argv == 0) { 1162fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o argv = malloc(sizeof(char *)); 1172fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o free(buf); 1182fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o } 1192fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o argv[argc] = 0; 1202fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o if (ret_argc) 1212fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o *ret_argc = argc; 1222fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o if (ret_argv) 1232fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o *ret_argv = argv; 1242fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o return 0; 1252fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o} 1262fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o 1272fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'ovoid argv_free(char **argv) 1282fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o{ 12945e338f5332a54295893dba2e32cc093d1316f60Jim Meyering free(*argv); 1302fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o free(argv); 1312fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o} 1322fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o 1332fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o#ifdef DEBUG 1342fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o/* 1352fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o * For debugging 1362fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o */ 1372fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o 1382fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o#include <stdio.h> 1392fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o 1402fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'oint main(int argc, char **argv) 1412fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o{ 1422fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o int ac, ret; 1432fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o char **av, **cpp; 1442fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o char buf[256]; 1452fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o 1462fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o while (!feof(stdin)) { 1472fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o if (fgets(buf, sizeof(buf), stdin) == NULL) 1482fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o break; 1492fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o ret = argv_parse(buf, &ac, &av); 1502fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o if (ret != 0) { 1512fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o printf("Argv_parse returned %d!\n", ret); 1522fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o continue; 1532fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o } 1542fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o printf("Argv_parse returned %d arguments...\n", ac); 1552fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o for (cpp = av; *cpp; cpp++) { 1562fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o if (cpp != av) 1572fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o printf(", "); 1582fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o printf("'%s'", *cpp); 1592fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o } 1602fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o printf("\n"); 1612fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o argv_free(av); 1622fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o } 1632fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o exit(0); 1642fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o} 1652fa9ba98337b07d6acfac52b5ee5dc8116dda866Theodore Ts'o#endif /* DEBUG */ 166