| /* Copyright © 1994-1999 Lucent Technologies Inc. All rights reserved. |
| * Portions Copyright © 1997-1999 Vita Nuova Limited |
| * Portions Copyright © 2000-2007 Vita Nuova Holdings Limited |
| * (www.vitanuova.com) |
| * Revisions Copyright © 2000-2007 Lucent Technologies Inc. and others |
| * |
| * Modified for the Akaros operating system: |
| * Copyright (c) 2013-2014 The Regents of the University of California |
| * Copyright (c) 2013-2015 Google Inc. |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a copy |
| * of this software and associated documentation files (the "Software"), to deal |
| * in the Software without restriction, including without limitation the rights |
| * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| * copies of the Software, and to permit persons to whom the Software is |
| * furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in |
| * all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| * SOFTWARE. */ |
| |
| #include <slab.h> |
| #include <kmalloc.h> |
| #include <kref.h> |
| #include <string.h> |
| #include <stdio.h> |
| #include <assert.h> |
| #include <error.h> |
| #include <cpio.h> |
| #include <pmap.h> |
| #include <smp.h> |
| #include <net/ip.h> |
| |
| static char qsep[] = " \t\r\n"; |
| |
| static char *qtoken(char *s) |
| { |
| int quoting; |
| char *t; |
| |
| quoting = 0; |
| t = s; /* s is output string, t is input string */ |
| while (*t != '\0' && (quoting || /*utfrune */ strchr(qsep, *t) == NULL)) |
| { |
| if (*t != '\'') { |
| *s++ = *t++; |
| continue; |
| } |
| /* *t is a quote */ |
| if (!quoting) { |
| quoting = 1; |
| t++; |
| continue; |
| } |
| /* quoting and we're on a quote */ |
| if (t[1] != '\'') { |
| /* end of quoted section; absorb closing quote */ |
| t++; |
| quoting = 0; |
| continue; |
| } |
| /* doubled quote; fold one quote into two */ |
| t++; |
| *s++ = *t++; |
| } |
| if (*s != '\0') { |
| *s = '\0'; |
| if (t == s) |
| t++; |
| } |
| return t; |
| } |
| |
| int tokenize(char *s, char **args, int maxargs) |
| { |
| int nargs; |
| |
| for (nargs = 0; nargs < maxargs; nargs++) { |
| while (*s != '\0' && /*utfrune */ strchr(qsep, *s) != NULL) |
| s++; |
| if (*s == '\0') |
| break; |
| args[nargs] = s; |
| s = qtoken(s); |
| } |
| |
| return nargs; |
| } |