1 files changed, 111 insertions, 0 deletions
diff --git a/lib/util/mkdir_parents.c b/lib/util/mkdir_parents.c
new file mode 100644
index 0000000..2c9f446
--- /dev/null
+++ b/lib/util/mkdir_parents.c
@@ -0,0 +1,111 @@
+/*
+ * SPDX-License-Identifier: ISC
+ *
+ * Copyright (c) 2009-2017 Todd C. Miller <Todd.Miller@sudo.ws>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/*
+ * This is an open source non-commercial project. Dear PVS-Studio, please check it.
+ * PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+ */
+
+#include <config.h>
+
+#include <sys/stat.h>
+#include <stdio.h>
+#include <stdlib.h>
+#ifdef HAVE_STDBOOL_H
+# include <stdbool.h>
+#else
+# include "compat/stdbool.h"
+#endif /* HAVE_STDBOOL_H */
+#include <string.h>
+#include <unistd.h>
+#include <errno.h>
+#include <fcntl.h>
+
+#include "sudo_compat.h"
+#include "sudo_fatal.h"
+#include "sudo_gettext.h"
+#include "sudo_debug.h"
+#include "sudo_util.h"
+
+/*
+ * Create any parent directories needed by path (but not path itself).
+ * Note that path is modified but is restored before it returns.
+ */
+bool
+sudo_mkdir_parents_v1(char *path, uid_t uid, gid_t gid, mode_t mode, bool quiet)
+{
+    char *slash = path;
+    debug_decl(sudo_mkdir_parents, SUDO_DEBUG_UTIL);
+
+    /* cppcheck-suppress nullPointerRedundantCheck */
+    while ((slash = strchr(slash + 1, '/')) != NULL) {
+	struct stat sb;
+	int dfd;
+
+	*slash = '\0';
+	sudo_debug_printf(SUDO_DEBUG_DEBUG|SUDO_DEBUG_LINENO,
+	    "mkdir %s, mode 0%o, uid %d, gid %d", path, (unsigned int)mode,
+	    (int)uid, (int)gid);
+reopen:
+	dfd = open(path, O_RDONLY|O_NONBLOCK);
+	if (dfd == -1) {
+	    if (errno != ENOENT) {
+		if (!quiet)
+		    sudo_warn(U_("unable to open %s"), path);
+		goto bad;
+	    }
+	    if (mkdir(path, mode) == 0) {
+		if (uid != (uid_t)-1 && gid != (gid_t)-1) {
+		    if (chown(path, uid, gid) != 0) {
+			sudo_debug_printf(SUDO_DEBUG_ERROR|SUDO_DEBUG_ERRNO,
+			    "%s: unable to chown %d:%d %s", __func__,
+			    (int)uid, (int)gid, path);
+		    }
+		}
+	    } else {
+		if (errno == EEXIST)
+		    goto reopen;
+		if (!quiet)
+		    sudo_warn(U_("unable to mkdir %s"), path);
+		goto bad;
+	    }
+	} else {
+	    /* Already exists, make sure it is a directory. */
+	    int rc = fstat(dfd, &sb);
+	    close(dfd);
+	    if (rc != 0) {
+		if (!quiet)
+		    sudo_warn(U_("unable to stat %s"), path);
+		goto bad;
+	    }
+	    if (!S_ISDIR(sb.st_mode)) {
+		if (!quiet)
+		    sudo_warnx(U_("%s exists but is not a directory (0%o)"),
+			path, (unsigned int) sb.st_mode);
+		goto bad;
+	    }
+	}
+	*slash = '/';
+    }
+
+    debug_return_bool(true);
+bad:
+    /* We must restore the path before we return. */
+    *slash = '/';
+    debug_return_bool(false);
+}