libntfs-3g/compat.c

   1 /**
   2  * compat.c - Tweaks for Windows compatibility
   3  *
   4  * Copyright (c) 2002 Richard Russon
   5  * Copyright (c) 2002-2004 Anton Altaparmakov
   6  *
   7  * This program/include file is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License as published
   9  * by the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program/include file is distributed in the hope that it will be
  13  * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
  14  * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program (in the main directory of the NTFS-3G
  19  * distribution in the file COPYING); if not, write to the Free Software
  20  * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  21  */
  22
  23 #ifdef HAVE_CONFIG_H
  24 #include "config.h"
  25 #endif
  26
  27 #include "compat.h"
  28
  29 #ifndef HAVE_FFS
  30 /**
  31  * ffs - Find the first set bit in an int
  32  * @x:
  33  *
  34  * Description...
  35  *
  36  * Returns:
  37  */
  38 int ffs(int x)
  39 {
  40         int r = 1;
  41
  42         if (!x)
  43                 return 0;
  44         if (!(x & 0xffff)) {
  45                 x >>= 16;
  46                 r += 16;
  47         }
  48         if (!(x & 0xff)) {
  49                 x >>= 8;
  50                 r += 8;
  51         }
  52         if (!(x & 0xf)) {
  53                 x >>= 4;
  54                 r += 4;
  55         }
  56         if (!(x & 3)) {
  57                 x >>= 2;
  58                 r += 2;
  59         }
  60         if (!(x & 1)) {
  61                 x >>= 1;
  62                 r += 1;
  63         }
  64         return r;
  65 }
  66 #endif /* HAVE_FFS */
  67
  68 #ifndef HAVE_DAEMON
  69 /* ************************************************************
  70  *  From: src.opensolaris.org
  71  *  src/lib/libresolv2/common/bsd/daemon.c
  72  */
  73 /*
  74  * Copyright (c) 1997-2000 by Sun Microsystems, Inc.
  75  * All rights reserved.
  76  */
  77
  78 #if defined(LIBC_SCCS) && !defined(lint)
  79 static const char sccsid[] = "@(#)daemon.c      8.1 (Berkeley) 6/4/93";
  80 static const char rcsid[] = "$Id: compat.c,v 1.1.1.1.2.1 2008-08-16 15:17:44 jpandre Exp $";
  81 #endif /* LIBC_SCCS and not lint */
  82
  83 /*
  84  * Copyright (c) 1990, 1993
  85  *      The Regents of the University of California.  All rights reserved.
  86  *
  87  * Redistribution and use in source and binary forms, with or without
  88  * modification, are permitted provided that the following conditions
  89  * are met:
  90  * 1. Redistributions of source code must retain the above copyright
  91  *    notice, this list of conditions and the following disclaimer.
  92  * 2. Redistributions in binary form must reproduce the above copyright
  93  *    notice, this list of conditions and the following disclaimer in the
  94  *    documentation and/or other materials provided with the distribution.
  95  * 3. All advertising materials mentioning features or use of this software
  96  *    must display the following acknowledgement:
  97  *      This product includes software developed by the University of
  98  *      California, Berkeley and its contributors.
  99  * 4. Neither the name of the University nor the names of its contributors
 100  *    may be used to endorse or promote products derived from this software
 101  *    without specific prior written permission.
 102  *
 103  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 104  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 105  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 106  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 107  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 108  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 109  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 110  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 111  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 112  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 113  * SUCH DAMAGE.
 114  */
 115
 116 #ifdef HAVE_FCNTL_H
 117 #include <fcntl.h>
 118 #endif
 119 #ifdef HAVE_UNISTD_H
 120 #include <unistd.h>
 121 #endif
 122
 123 int daemon(int nochdir, int noclose) {
 124         int fd;
 125
 126         switch (fork()) {
 127         case -1:
 128                 return (-1);
 129         case 0:
 130                 break;
 131         default:
 132                 _exit(0);
 133         }
 134
 135         if (setsid() == -1)
 136                 return (-1);
 137
 138         if (!nochdir)
 139                 (void)chdir("/");
 140
 141         if (!noclose && (fd = open("/dev/null", O_RDWR, 0)) != -1) {
 142                 (void)dup2(fd, 0);
 143                 (void)dup2(fd, 1);
 144                 (void)dup2(fd, 2);
 145                 if (fd > 2)
 146                         (void)close (fd);
 147         }
 148         return (0);
 149 }
 150 /*
 151  *  End: src/lib/libresolv2/common/bsd/daemon.c
 152  *************************************************************/
 153 #endif /* HAVE_DAEMON */
 154
 155 #ifndef HAVE_STRSEP
 156 /* ************************************************************
 157  *  From: src.opensolaris.org
 158  *  src/lib/libresolv2/common/bsd/strsep.c
 159  */
 160 /*
 161  * Copyright (c) 1997, by Sun Microsystems, Inc.
 162  * All rights reserved.
 163  */
 164
 165 #if defined(LIBC_SCCS) && !defined(lint)
 166 static const char sccsid[] = "strsep.c  8.1 (Berkeley) 6/4/93";
 167 static const char rcsid[] = "$Id: compat.c,v 1.1.1.1.2.1 2008-08-16 15:17:44 jpandre Exp $";
 168 #endif /* LIBC_SCCS and not lint */
 169
 170 /*
 171  * Copyright (c) 1990, 1993
 172  *      The Regents of the University of California.  All rights reserved.
 173  *
 174  * Redistribution and use in source and binary forms, with or without
 175  * modification, are permitted provided that the following conditions
 176  * are met:
 177  * 1. Redistributions of source code must retain the above copyright
 178  *    notice, this list of conditions and the following disclaimer.
 179  * 2. Redistributions in binary form must reproduce the above copyright
 180  *    notice, this list of conditions and the following disclaimer in the
 181  *    documentation and/or other materials provided with the distribution.
 182  * 3. All advertising materials mentioning features or use of this software
 183  *    must display the following acknowledgement:
 184  *      This product includes software developed by the University of
 185  *      California, Berkeley and its contributors.
 186  * 4. Neither the name of the University nor the names of its contributors
 187  *    may be used to endorse or promote products derived from this software
 188  *    without specific prior written permission.
 189  *
 190  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 191  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 192  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 193  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 194  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 195  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 196  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 197  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 198  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 199  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 200  * SUCH DAMAGE.
 201  */
 202
 203 #ifdef HAVE_STRING_H
 204 #include <string.h>
 205 #endif
 206 #ifdef HAVE_STDIO_H
 207 #include <stdio.h>
 208 #endif
 209
 210 /*
 211  * Get next token from string *stringp, where tokens are possibly-empty
 212  * strings separated by characters from delim.
 213  *
 214  * Writes NULs into the string at *stringp to end tokens.
 215  * delim need not remain constant from call to call.
 216  * On return, *stringp points past the last NUL written (if there might
 217  * be further tokens), or is NULL (if there are definitely no more tokens).
 218  *
 219  * If *stringp is NULL, strsep returns NULL.
 220  */
 221 char *strsep(char **stringp, const char *delim) {
 222         char *s;
 223         const char *spanp;
 224         int c, sc;
 225         char *tok;
 226
 227         if ((s = *stringp) == NULL)
 228                 return (NULL);
 229         for (tok = s;;) {
 230                 c = *s++;
 231                 spanp = delim;
 232                 do {
 233                         if ((sc = *spanp++) == c) {
 234                                 if (c == 0)
 235                                         s = NULL;
 236                                 else
 237                                         s[-1] = 0;
 238                                 *stringp = s;
 239                                 return (tok);
 240                         }
 241                 } while (sc != 0);
 242         }
 243         /* NOTREACHED */
 244 }
 245
 246 /*
 247  *  End: src/lib/libresolv2/common/bsd/strsep.c
 248  *************************************************************/
 249 #endif /* HAVE_STRSEP */
 250