usr.bin/patch/mkpath.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-3-Clause
   3  *
   4  * Copyright (c) 1983, 1992, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the University nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  *
  31  * $OpenBSD: mkpath.c,v 1.2 2005/06/20 07:14:06 otto Exp $
  32  * $FreeBSD: head/usr.bin/patch/mkpath.c 326025 2017-11-20 19:49:47Z pfg $
  33  */
  34
  35 #include <sys/types.h>
  36 #include <sys/stat.h>
  37 #include <err.h>
  38 #include <errno.h>
  39 #include <string.h>
  40
  41 int     mkpath(char *);
  42
  43 /* Code taken directly from mkdir(1).
  44
  45  * mkpath -- create directories.
  46  *      path     - path
  47  */
  48 int
  49 mkpath(char *path)
  50 {
  51         struct stat sb;
  52         char *slash;
  53         int done = 0;
  54
  55         slash = path;
  56
  57         while (!done) {
  58                 slash += strspn(slash, "/");
  59                 slash += strcspn(slash, "/");
  60
  61                 done = (*slash == '\0');
  62                 *slash = '\0';
  63
  64                 if (stat(path, &sb)) {
  65                         if (errno != ENOENT || (mkdir(path, 0777) &&
  66                             errno != EEXIST)) {
  67                                 warn("%s", path);
  68                                 return (-1);
  69                         }
  70                 } else if (!S_ISDIR(sb.st_mode)) {
  71                         warnx("%s: %s", path, strerror(ENOTDIR));
  72                         return (-1);
  73                 }
  74
  75                 *slash = '/';
  76         }
  77
  78         return (0);
  79 }
  80