xbps/lib/mkpath.c

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/*
* Copyright (c) 1983, 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
* The following is a modified function from NetBSD's src/bin/mkdir/mkdir.c
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <sys/stat.h>
#include <xbps_api.h>
/**
* @file lib/mkpath.c
* @brief Generic directory creation routines
* @defgroup dircreate Generic directory creation functions
*/
int
xbps_mkpath(char *path, mode_t mode)
{
struct stat sb;
char *slash = path;
int done = 0, rv;
mode_t dir_mode;
/*
* The default file mode is a=rwx (0777) with selected permissions
* removed in accordance with the file mode creation mask. For
* intermediate path name components, the mode is the default modified
* by u+wx so that the subdirectories can always be created.
*/
if (mode == 0)
mode = (S_IRWXU | S_IRWXG | S_IRWXO) & ~umask(0);
dir_mode = mode | S_IWUSR | S_IXUSR;
for (;;) {
slash += strspn(slash, "/");
slash += strcspn(slash, "/");
done = (*slash == '\0');
*slash = '\0';
rv = mkdir(path, done ? mode : dir_mode);
if (rv < 0) {
/*
* Can't create; path exists or no perms.
* stat() path to determine what's there now.
*/
int sverrno;
sverrno = errno;
if (stat(path, &sb) < 0) {
/* Not there; use mkdir()s error */
errno = sverrno;
return -1;
}
if (!S_ISDIR(sb.st_mode)) {
/* Is there, but isn't a directory */
errno = ENOTDIR;
return -1;
}
}
if (done)
break;
*slash = '/';
}
return 0;
}