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/* mkdir_p.c - Create a directory and any missing parents.
* Copyright (C) 2015 g10 Code GmbH
*
* This file is part of GnuPG.
*
* This file is free software; you can redistribute it and/or modify
* it under the terms of either
*
* - the GNU Lesser General Public License as published by the Free
* Software Foundation; either version 3 of the License, or (at
* your option) any later version.
*
* or
*
* - the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at
* your option) any later version.
*
* or both in parallel, as here.
*
* This file is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include <config.h>
#include <sys/stat.h>
#include <errno.h>
#include <assert.h>
#include <stdarg.h>
#include "util.h"
#include "stringhelp.h"
#include "logging.h"
#include "sysutils.h"
#include "mkdir_p.h"
gpg_error_t
gnupg_amkdir_p (const char **directory_components)
{
gpg_error_t err = 0;
int count;
char **dirs;
int i;
for (count = 0; directory_components[count]; count ++)
;
/* log_debug ("%s: %d directory components.\n", __func__, count); */
dirs = xtrycalloc (count, sizeof *dirs);
if (!dirs)
return gpg_err_make (default_errsource, gpg_err_code_from_syserror ());
for (i = 0; directory_components[i]; i ++)
{
if (i == 0)
dirs[i] = xtrystrdup (directory_components[i]);
else
dirs[i] = make_filename_try (dirs[i-1], directory_components[i], NULL);
if (!dirs[i])
{
err = gpg_err_make (default_errsource, gpg_err_code_from_syserror ());
goto out;
}
/* log_debug ("%s: Directory %d: `%s'.\n", __func__, i, dirs[i]); */
}
for (i = count - 1; i >= 0; i --)
{
struct stat s;
/* log_debug ("%s: stat(%s)\n", __func__, dirs[i]); */
if (!stat (dirs[i], &s))
{
if ( ! S_ISDIR (s.st_mode))
{
/* log_debug ("%s: %s exists, but is not a directory!\n", */
/* __func__, dirs[i]); */
err = gpg_err_make (default_errsource, GPG_ERR_ENOTDIR);
goto out;
}
else
{
/* Got a directory. */
/* log_debug ("%s: %s exists and is a directory!\n", */
/* __func__, dirs[i]); */
err = 0;
break;
}
}
else if (errno == ENOENT)
/* This directory does not exist yet. Continue walking up the
hierarchy. */
{
/* log_debug ("%s: %s does not exist!\n", */
/* __func__, dirs[i]); */
continue;
}
else
/* Some other error code. Die. Note: this could be ENOTDIR
(we return this above), which means that a component of the
path prefix is not a directory. */
{
/* log_debug ("%s: stat(%s) => %s!\n", */
/* __func__, dirs[i], strerror (errno)); */
err = gpg_err_make (default_errsource, gpg_err_code_from_syserror ());
goto out;
}
}
assert (i >= -1);
/* DIRS[I] exists. Start with the following entry. */
i ++;
for (; i < count; i ++)
{
/* log_debug ("Creating directory: %s\n", dirs[i]); */
if (gnupg_mkdir (dirs[i], "-rwx"))
{
err = gpg_err_make (default_errsource, gpg_err_code_from_syserror ());
goto out;
}
}
out:
for (i = 0; i < count; i ++)
xfree (dirs[i]);
xfree (dirs);
/* log_debug ("%s: Returning %s\n", __func__, gpg_strerror (rc)); */
return err;
}
gpg_error_t
gnupg_mkdir_p (const char *directory_component, ...)
{
va_list ap;
gpg_error_t err = 0;
int i;
int space = 1;
const char **dirs;
dirs = xtrymalloc (space * sizeof (char *));
if (!dirs)
return gpg_err_make (default_errsource, gpg_err_code_from_syserror ());
dirs[0] = directory_component;
va_start (ap, directory_component);
for (i = 1; dirs[i - 1]; i ++)
{
if (i == space)
{
const char **tmp_dirs;
space = 2 * space;
tmp_dirs = xtryrealloc (dirs, space * sizeof (char *));
if (!tmp_dirs)
{
err = gpg_err_make (default_errsource,
gpg_err_code_from_syserror ());
break;
}
dirs = tmp_dirs;
}
dirs[i] = va_arg (ap, char *);
}
va_end (ap);
if (!err)
err = gnupg_amkdir_p (dirs);
xfree (dirs);
return err;
}
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