diff options
Diffstat (limited to 'common/mkdir_p.c')
| -rw-r--r-- | common/mkdir_p.c | 187 |
1 files changed, 187 insertions, 0 deletions
diff --git a/common/mkdir_p.c b/common/mkdir_p.c new file mode 100644 index 0000000..6fb98c3 --- /dev/null +++ b/common/mkdir_p.c @@ -0,0 +1,187 @@ +/* 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 <https://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] = make_filename_try (directory_components[i], NULL); + 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 (!gnupg_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; +} |