1 files changed, 98 insertions, 0 deletions
diff --git a/libbb/make_directory.c b/libbb/make_directory.c
new file mode 100644
index 0000000..391493c
--- /dev/null
+++ b/libbb/make_directory.c
@@ -0,0 +1,98 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * parse_mode implementation for busybox
+ *
+ * Copyright (C) 2003  Manuel Novoa III  <mjn3@codepoet.org>
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ */
+
+/* Mar 5, 2003    Manuel Novoa III
+ *
+ * This is the main work function for the 'mkdir' applet.  As such, it
+ * strives to be SUSv3 compliant in it's behaviour when recursively
+ * making missing parent dirs, and in it's mode setting of the final
+ * directory 'path'.
+ *
+ * To recursively build all missing intermediate directories, make
+ * sure that (flags & FILEUTILS_RECUR) is non-zero.  Newly created
+ * intermediate directories will have at least u+wx perms.
+ *
+ * To set specific permissions on 'path', pass the appropriate 'mode'
+ * val.  Otherwise, pass -1 to get default permissions.
+ */
+
+#include "libbb.h"
+
+/* This function is used from NOFORK applets. It must not allocate anything */
+
+int FAST_FUNC bb_make_directory(char *path, long mode, int flags)
+{
+	mode_t mask;
+	const char *fail_msg;
+	char *s = path;
+	char c;
+	struct stat st;
+
+	mask = umask(0);
+	umask(mask & ~0300); /* Ensure intermediate dirs are wx */
+
+	while (1) {
+		c = '\0';
+
+		if (flags & FILEUTILS_RECUR) {	/* Get the parent. */
+			/* Bypass leading non-'/'s and then subsequent '/'s. */
+			while (*s) {
+				if (*s == '/') {
+					do {
+						++s;
+					} while (*s == '/');
+					c = *s; /* Save the current char */
+					*s = '\0'; /* and replace it with nul. */
+					break;
+				}
+				++s;
+			}
+		}
+
+		if (!c) /* Last component uses orig umask */
+			umask(mask);
+
+		if (mkdir(path, 0777) < 0) {
+			/* If we failed for any other reason than the directory
+			 * already exists, output a diagnostic and return -1. */
+			if (errno != EEXIST
+			 || !(flags & FILEUTILS_RECUR)
+			 || ((stat(path, &st) < 0) || !S_ISDIR(st.st_mode))
+			) {
+				fail_msg = "create";
+				umask(mask);
+				break;
+			}
+			/* Since the directory exists, don't attempt to change
+			 * permissions if it was the full target.  Note that
+			 * this is not an error condition. */
+			if (!c) {
+				umask(mask);
+				return 0;
+			}
+		}
+
+		if (!c) {
+			/* Done.  If necessary, update perms on the newly
+			 * created directory.  Failure to update here _is_
+			 * an error. */
+			if ((mode != -1) && (chmod(path, mode) < 0)) {
+				fail_msg = "set permissions of";
+				break;
+			}
+			return 0;
+		}
+
+		/* Remove any inserted nul from the path (recursive mode). */
+		*s = c;
+	} /* while (1) */
+
+	bb_perror_msg("cannot %s directory '%s'", fail_msg, path);
+	return -1;
+}